10.1. SCALE Cross Section Libraries

A. Holcomb, D. Wiarda, C. Celik, K. S. Kim, M. L. Williams, M. E. Dunn, B. T. Rearden

ABSTRACT

The cross section data libraries available in the SCALE code system are briefly described in this section. All libraries were processed from ENDF/B-VII.1 and -VIII.0 evaluated data files using the AMPX code system. Continuous-energy libraries as well as several multigroup libraries for a variety of applications are included in SCALE. Several fine-group and broad-group structures are available so that a user may select the nuclear data library based on considerations of application, accuracy, and execution time.

ACKNOWLEDGMENTS

We would like to acknowledge all those who participated in developing and implementing the SCALE cross section libraries for their assistance in preparing previous versions of this document. Special thanks go to S. Goluoglu, N. M. Greene, and L. M. Petrie for their contributions to SCALE data processing efforts, and to C. R. Daily and W. J. Marshall for their extensive validation testing of the libraries described here.

10.1.1. Introduction

SCALE includes both multigroup (MG) and pointwise continuous energy (CE) nuclear data libraries, which were processed using the AMPX code system [XSLibWWCD15]. Libraries are available for neutron and for coupled neutron-photon transport calculations. The CE libraries are used for Monte Carlo calculations with CE-KENO (criticality) and CE-Monaco (shielding), and are also used by the pointwise (PW) discrete ordinates code CENTRM to obtain PW flux spectra for computing self-shielded MG cross sections. The MG libraries are used in the MG-KENO and MG-Monaco Monte Carlo codes, and in the deterministic transport codes XSDRNPM, NEWT, and DENOVO. All cross section libraries in SCALE 6.3 and later versions are based strictly on ENDF/B-VII.1 [XSLibCHO+11] and ENDF/B-VIII.0 [XSLibDAB18], while earlier SCALE releases included libraries processed from ENDF/B-VI.8, V, and IV. The ENDF/B-VII.1 CE and MG libraries include the 423 nuclides shown in Table 10.1.1, and the ENDF/B-VIII.0 CE and MG libraries contain data for 556 nuclides (Note that while ENDF/B-VIII.0 contains data for neutron-as-a-target, this data is not useful for SCALE calculations and is thus the processed data is not released with SCALE.). ENDF does not have evaluated data for several isotopes in the SCALE Standard Composition Data; therefore the libraries do not include cross sections for these nuclides, which are listed in Table 10.1.2. If one of these isotopes is explicitly requested or if the natural element containing the isotope is requested in the SCALE input, a warning message is written saying that the nuclide is being omitted from the calculations. The most commonly encountered example of this is O-18 which has an abundance of approximately 0.2% in elemental oxygen (Note that O-18 data are available in ENDF/B-VIII.0, but not ENDF/B-VII.1.).

The ENDF/B-VII.1 libraries include 21 thermal-scattering moderators for which bound-scattering kernels [e.g., S(\(\alpha\),\(\beta\))] are provided as given in Table 10.1.3. This table also lists the temperatures available in MG and CE libraries for the materials with bound kernels. The ENDF/B-VIII.0 libraries include 34 thermal-scattering moderators for which bound-scattering kernels are provided; of particular interest are updated thermal scatter laws for HinH2O and multiple graphite compositions. The thermal scattering kernels for all other materials are based on the free-gas kernel. On the MG libraries, these nuclides have 2D scattering matrices processed from the free-gas kernel evaluated at the temperatures of 293 K, 565 K, 600 K, 900 K, 1200 K, 2000 K, and 2400 K. SCALE 6.3 includes routines that automatically interpolate the CE cross section data, as well as thermal scattering kernels to any arbitrary temperature for Monte Carlo calculations [XSLibHCML16]. Analogous procedures are available for MG data. The CE libraries do not include free gas kernel data because the transport codes internally evaluate the free gas scattering information at the specified temperature.

For each reaction and nuclide, CE data were processed from ENDF/B in the manner described in Sect. 10.1.2.5. The CE data were further processed into several generic MG libraries focused on different applications. CE data are stored as individual files for each nuclide, and an associated cross section directory file contains the names of the individual files. Furthermore, the MG libraries each contain data for all nuclides. AMPX master libraries are very general and contain essentially all reaction data available in ENDF/B, as well as several specialized cross sections used in SCALE. The master libraries also include Bondarenko shielding factors tabulated as a function of background cross section and temperature for all nuclides and groups, and the master libraries may contain intermediate resonance parameters for self-shielding. A much improved methodology in AMPX was used to process more accurate shielding factors for the most important resonance absorbers.1

The CE and MG libraries available in SCALE 6.3 are given in Table 10.1.4, which also lists the main source of data for each library. The desired MG or CE library for a computation is typically selected by specifying the appropriate mnemonic name from Table 10.1.4. The CE library mnemonic corresponds to the actual name of the cross section directory file, and the MG mnemonic is an alias for the file containing the actual master library, shown in the third column of Table 10.1.4. SCALE control modules recognize the mnemonics in the first column, or the standard MG library name in the third columns of the table. Users also may supply their own MG library by specifying the file name as the library name in the control module input (only lower case alphanumeric characters are allowed in the filename, and the filename must be eight characters or less in length). The library must be an AMPX master library and must be located in the SCALE data directory or the temporary working directory where the problem is run.

The CE data libraries do not require additional processing prior to their use in transport computations. However the MG libraries distributed with the SCALE code system contain problem-independent cross sections processed with generic weighting functions appropriate for a specified type of application (e.g., criticality safety, shielding, etc.). These data must be further processed into problem-dependent libraries by performing resonance self-shielding and other modifications. This is done by the XSProc module during the execution of a SCALE control sequence prior to executing a transport solver.

Table 10.1.1 Nuclides in CE and MG ENDF/B-VII.0 and -VII.1 libraries.

SCALE ID

Name

Gamma production dataa

Full range Bondarenko factorsb

Gamma interaction evaluationc

Notes

1001

h

yes

yes

h

1001001

h-liquid_ch4

yes

yes

h

2001001

h-solid_ch4

yes

yes

h

4001001

h-cryo_ortho

yes

yes

h

5001001

h-cryo_para

yes

yes

h

6001001

h-benzene

yes

yes

h

7001001

h-zrh2

yes

yes

h

8001001

hfreegas

yes

yes

h

9001001

h-poly

yes

yes

h

1002

d

yes

yes

h

4001002

d-cryo_ortho

yes

yes

h

5001002

d-cryo_para

yes

yes

h

8001002

dfreegas

yes

yes

h

1003

h-3

yes

h

2003

he-3

yes

he

2004

he-4

yes

he

3006

li-6

yes

yes

li

3007

li-7

yes

yes

li

4007

be-7

yes

be

4009

be-9

yes

yes

be

3004009

bebound

yes

yes

be

5004009

be-beo

yes

yes

be

5010

b-10

yes

yes

b

5011

b-11

yes

yes

b

6000

c

yes

yes

c

3006000

graphite

yes

yes

c

5006000

h-benzene

yes

yes

c

7014

n-14

yes

yes

n

7015

n-15

yes

yes

n

8016

o-16

yes

yes

o

5008016

o-beo

yes

yes

o

8017

o-17

yes

o

9019

f-19

yes

yes

f

11022

na-22

yes

na

11023

na-23

yes

yes

na

12024

mg-24

yes

yes

mg

12025

mg-25

yes

yes

mg

12026

mg-26

yes

yes

mg

13027

al-27

yes

yes

al

1013027

albound

yes

yes

al

14028

si-28

yes

yes

si

14029

si-29

yes

yes

si

14030

si-30

yes

yes

si

1014028

sibound

yes

yes

si

ENDF/B-VII.1 only

1014029

sibound

yes

yes

si

ENDF/B-VII.1 only

1014030

sibound

yes

yes

si

ENDF/B-VII.1 only

15031

p-31

yes

yes

p

16032

s-32

yes

yes

s

16033

s-33

yes

yes

s

16034

s-34

yes

yes

s

16036

s-36

yes

yes

s

17035

cl-35

yes

yes

cl

17037

cl-37

yes

yes

cl

18036

ar-36

yes

ar

18038

ar-38

yes

ar

18040

ar-40

yes

ar

19039

k-39

yes

yes

k

19040

k-40

yes

yes

k

19041

k-41

yes

yes

k

20040

ca-40

yes

yes

ca

20042

ca-42

yes

yes

ca

20043

ca-43

yes

yes

ca

20044

ca-44

yes

yes

ca

20046

ca-46

yes

yes

ca

20048

ca-48

yes

yes

ca

21045

sc-45

yes

yes

sc

22046

ti-46

yes

yes

ti

22047

ti-47

yes

yes

ti

22048

ti-48

yes

yes

ti

22049

ti-49

yes

yes

ti

22050

ti-50

yes

yes

ti

23000

v

yes

v

ENDF/B-VII.0 only

23050

v-50

yes

yes

v

ENDF/B-VII.1 only

23051

v-51

yes

yes

v

ENDF/B-VII.1 only

24050

cr-50

yes

yes

cr

24052

cr-52

yes

yes

cr

24053

cr-53

yes

yes

cr

24054

cr-54

yes

yes

cr

25055

mn-55

yes

yes

mn

26054

fe-54

yes

yes

fe

26056

fe-56

yes

yes

fe

26057

fe-57

yes

yes

fe

26058

fe-58

yes

yes

fe

1026000

febound

yes

yes

fe

27058

co-58

ENDF/B-VII.1

yes

co

1027058

co-58m

yes

co

27059

co-59

yes

yes

co

28058

ni-58

yes

yes

ni

28059

ni-59

yes

yes

ni

28060

ni-60

yes

yes

ni

28061

ni-61

yes

yes

ni

28062

ni-62

yes

yes

ni

28064

ni-64

yes

yes

ni

29063

cu-63

yes

yes

cu

29065

cu-65

yes

yes

cu

30000

zn

zn

ENDF/B-VII.0 only

30064

zn-64

yes

yes

zn

ENDF/B-VII.1 only

30065

zn-65

yes

yes

zn

ENDF/B-VII.1only

30066

zn-66

yes

yes

zn

ENDF/B-VII.1 only

30067

zn-67

yes

yes

zn

ENDF/B-VII.1 only

30068

zn-68

yes

yes

zn

ENDF/B-VII.1 only

30070

zn-70

yes

yes

zn

ENDF/B-VII.1 only

31069

ga-69

yes

ga

31071

ga-71

yes

ga

32070

ge-70

yes

yes

ge

32072

ge-72

yes

yes

ge

32073

ge-73

yes

yes

ge

32074

ge-74

yes

yes

ge

32076

ge-76

yes

yes

ge

33074

as-74

yes

yes

as

33075

as-75

yes

yes

as

34074

se-74

yes

se

34076

se-76

yes

se

34077

se-77

yes

se

34078

se-78

yes

se

34079

se-79

yes

se

34080

se-80

yes

se

34082

se-82

yes

se

35079

br-79

yes

br

35081

br-81

yes

br

36078

kr-78

ENDF/B-VII.1

yes

kr

36080

kr-80

yes

kr

36082

kr-82

yes

kr

36083

kr-83

yes

kr

36084

kr-84

yes

kr

36085

kr-85

yes

yes

kr

36086

kr-86

yes

kr

37085

rb-85

yes

rb

37086

rb-86

yes

yes

rb

37087

rb-87

yes

rb

38084

sr-84

yes

yes

sr

38086

sr-86

yes

sr

38087

sr-87

yes

sr

38088

sr-88

yes

sr

38089

sr-89

yes

sr

38090

sr-90

yes

sr

39089

y-89

yes

yes

y

39090

y-90

yes

yes

y

39091

y-91

yes

y

40090

zr-90

yes

yes

zr

1040090

zr90-zr5h8

yes

yes

zr

40091

zr-91

yes

yes

zr

1040091

zr91-zr5h8

yes

yes

zr

40092

zr-92

yes

yes

zr

1040092

zr92-zr5h8

yes

yes

zr

40093

zr-93

ENDF/B-VII.1

yes

zr

1040093

zr93-zr5h8

ENDF/B-VII.1

yes

zr

40094

zr-94

yes

yes

zr

1040094

zr94-zr5h8

yes

yes

zr

40095

zr-95

ENDF/B-VII.1

yes

zr

1040095

zr95-zr5h8

ENDF/B-VII.1

yes

zr

40096

zr-96

yes

yes

zr

1040096

zr96-zr5h8

yes

yes

zr

41093

nb-93

yes

yes

nb

41094

nb-94

yes

nb

41095

nb-95

yes

nb

42092

mo-92

yes

yes

mo

42094

mo-94

yes

yes

mo

42095

mo-95

yes

yes

mo

42096

mo-96

yes

yes

mo

42097

mo-97

yes

yes

mo

42098

mo-98

yes

yes

mo

42099

mo-99

yes

mo

42100

mo-100

yes

mo

43099

tc-99

yes

yes

tc

44096

ru-96

yes

ru

44098

ru-98

yes

ru

44099

ru-99

yes

ru

44100

ru-100

yes

ru

44101

ru-101

yes

yes

ru

44102

ru-102

yes

ru

44103

ru-103

yes

ru

44104

ru-104

yes

ru

44105

ru-105

yes

ru

44106

ru-106

yes

ru

45103

rh-103

yes

yes

rh

45105

rh-105

yes

rh

46102

pd-102

yes

yes

pd

46104

pd-104

yes

yes

pd

46105

pd-105

yes

yes

pd

46106

pd-106

yes

yes

pd

46107

pd-107

yes

pd

46108

pd-108

yes

yes

pd

46110

pd-110

yes

yes

pd

47107

ag-107

yes

yes

ag

47109

ag-109

yes

yes

ag

1047110

ag-110m

yes

ag

47111

ag-111

yes

yes

ag

48106

cd-106

yes

yes

cd

48108

cd-108

yes

cd

48110

cd-110

yes

cd

48111

cd-111

yes

yes

cd

48112

cd-112

yes

cd

48113

cd-113

yes

cd

48114

cd-114

yes

cd

1048115

cd-115m

yes

yes

cd

48116

cd-116

yes

cd

49113

in-113

yes

in

49115

in-115

yes

in

50112

sn-112

yes

sn

50113

sn-113

yes

yes

sn

50114

sn-114

yes

sn

50115

sn-115

yes

sn

50116

sn-116

yes

sn

50117

sn-117

yes

sn

50118

sn-118

yes

sn

50119

sn-119

yes

sn

50120

sn-120

yes

sn

50122

sn-122

yes

sn

50123

sn-123

yes

sn

50124

sn-124

yes

sn

50125

sn-125

yes

yes

sn

50126

sn-126

yes

sn

51121

sb-121

yes

sb

51123

sb-123

yes

sb

51124

sb-124

yes

sb

51125

sb-125

yes

sb

51126

sb-126

yes

yes

sb

52120

te-120

yes

te

52122

te-122

yes

te

52123

te-123

yes

te

52124

te-124

yes

te

52125

te-125

yes

te

52126

te-126

yes

te

1052127

te-127m

yes

te

52128

te-128

yes

te

1052129

te-129m

yes

te

52130

te-130

yes

te

52132

te-132

yes

yes

te

53127

i-127

yes

yes

i

53129

i-129

yes

i

53130

i-130

yes

yes

i

53131

i-131

yes

i

53135

i-135

yes

i

54123

xe-123

ENDF/B-VII.1

yes

xe

54124

xe-124

ENDF/B-VII.1

yes

xe

54126

xe-126

yes

xe

54128

xe-128

yes

xe

54129

xe-129

yes

xe

54130

xe-130

yes

xe

54131

xe-131

yes

yes

xe

54132

xe-132

yes

xe

54133

xe-133

yes

xe

54134

xe-134

yes

xe

54135

xe-135

yes

xe

54136

xe-136

yes

xe

55133

cs-133

yes

yes

cs

55134

cs-134

yes

cs

55135

cs-135

yes

cs

55136

cs-136

yes

cs

55137

cs-137

yes

cs

56130

ba-130

yes

ba

56132

ba-132

yes

ba

56133

ba-133

yes

yes

ba

56134

ba-134

yes

ba

56135

ba-135

yes

ba

56136

ba-136

yes

ba

56137

ba-137

yes

ba

56138

ba-138

yes

ba

56140

ba-140

yes

ba

57138

la-138

yes

la

57139

la-139

yes

la

57140

la-140

yes

yes

la

58136

ce-136

yes

yes

ce

58138

ce-138

yes

yes

ce

58139

ce-139

yes

yes

ce

58140

ce-140

yes

ce

58141

ce-141

yes

ce

58142

ce-142

yes

ce

58143

ce-143

yes

yes

ce

58144

ce-144

yes

ce

59141

pr-141

yes

yes

pr

59142

pr-142

yes

yes

pr

59143

pr-143

yes

pr

60142

nd-142

yes

yes

nd

60143

nd-143

yes

yes

nd

60144

nd-144

yes

yes

nd

60145

nd-145

yes

yes

nd

60146

nd-146

yes

yes

nd

60147

nd-147

yes

yes

nd

60148

nd-148

yes

yes

nd

60150

nd-150

yes

yes

nd

61147

pm-147

yes

pm

61148

pm-148

yes

pm

1061148

pm-148m

yes

pm

61149

pm-149

yes

pm

61151

pm-151

yes

yes

pm

62144

sm-144

yes

yes

sm

62147

sm-147

yes

yes

sm

62148

sm-148

yes

yes

sm

62149

sm-149

yes

yes

sm

62150

sm-150

yes

yes

sm

62151

sm-151

yes

yes

sm

62152

sm-152

yes

yes

sm

62153

sm-153

yes

yes

sm

62154

sm-154

yes

yes

sm

63151

eu-151

yes

eu

63152

eu-152

yes

eu

63153

eu-153

yes

yes

eu

63154

eu-154

yes

eu

63155

eu-155

yes

eu

63156

eu-156

yes

eu

63157

eu-157

yes

yes

eu

64152

gd-152

yes

yes

gd

64153

gd-153

yes

yes

gd

64154

gd-154

yes

yes

gd

64155

gd-155

yes

yes

gd

64156

gd-156

yes

yes

gd

64157

gd-157

yes

yes

gd

64158

gd-158

yes

yes

gd

64160

gd-160

yes

yes

gd

65159

tb-159

yes

tb

65160

tb-160

yes

yes

tb

66156

dy-156

yes

yes

dy

66158

dy-158

yes

yes

dy

66160

dy-160

yes

yes

dy

66161

dy-161

yes

yes

dy

66162

dy-162

yes

yes

dy

66163

dy-163

yes

yes

dy

66164

dy-164

yes

yes

dy

67165

ho-165

yes

yes

ho

1067166

ho-166m

yes

yes

ho

68162

er-162

yes

yes

er

68164

er-164

yes

yes

er

68166

er-166

yes

yes

er

68167

er-167

yes

yes

er

68168

er-168

yes

yes

er

68170

er-170

yes

yes

er

69168

tm-168

yes

yes

tm

ENDF/B-VII.1 only

69169

tm-169

yes

yes

tm

ENDF/B-VII.1 only

69170

tm-170

yes

yes

tm

ENDF/B-VII.1 only

71175

lu-175

yes

lu

71176

lu-176

yes

lu

72174

hf-174

ENDF/B-VII.1

yes

hf

72176

hf-176

ENDF/B-VII.1

yes

hf

72177

hf-177

ENDF/B-VII.1

yes

hf

72178

hf-178

ENDF/B-VII.1

yes

hf

72179

hf-179

ENDF/B-VII.1

yes

hf

72180

hf-180

ENDF/B-VII.1

yes

hf

73180

ta-180

yes

yes

ta

ENDF/B-VII.1 only

73181

ta-181

yes

yes

ta

73182

ta-182

yes

ta

74180

w-180

yes

yes

w

ENDF/B-VII.1 only

74182

w-182

yes

yes

w

74183

w-183

yes

yes

w

74184

w-184

yes

yes

w

74186

w-186

yes

yes

w

75185

re-185

ENDF/B-VII.1

yes

re

75187

re-187

ENDF/B-VII.1

yes

re

77191

ir-191

yes

yes

ir

77193

ir-193

yes

yes

ir

79197

au-197

yes

yes

au

80196

hg-196

yes

yes

hg

80198

hg-198

yes

yes

hg

80199

hg-199

yes

yes

hg

80200

hg-200

yes

yes

hg

80201

hg-201

yes

yes

hg

80202

hg-202

yes

yes

hg

80204

hg-204

yes

yes

hg

81203

tl-203

yes

yes

tl

ENDF/B-VII.1 only

81205

tl-205

yes

yes

tl

ENDF/B-VII.1 only

82204

pb-204

yes

yes

pb

82206

pb-206

yes

yes

pb

82207

pb-207

yes

yes

pb

82208

pb-208

yes

yes

pb

83209

bi-209

yes

yes

bi

88223

ra-223

yes

ra

88224

ra-224

yes

ra

88225

ra-225

yes

ra

88226

ra-226

yes

ra

89225

ac-225

ENDF/B-VII.1

yes

ac

89226

ac-226

ENDF/B-VII.1

yes

ac

89227

ac-227

ENDF/B-VII.1

yes

ac

90227

th-227

ENDF/B-VII.1

yes

th

90228

th-228

ENDF/B-VII.1

yes

th

90229

th-229

ENDF/B-VII.1

yes

th

90230

th-230

ENDF/B-VII.1

yes

th

90231

th-231

yes

yes

th

ENDF/B-VII.1 only

90232

th-232

yes

yes

th

90233

th-233

ENDF/B-VII.1

yes

th

90234

th-234

ENDF/B-VII.1

yes

th

91229

pa-229

yes

yes

pa

ENDF/B-VII.1 only

91230

pa-230

yes

yes

pa

ENDF/B-VII.1 only

91231

pa-231

yes

yes

pa

91232

pa-232

ENDF/B-VII.1

yes

pa

91233

pa-233

yes

yes

pa

92230

u-230

yes

yes

u

ENDF/B-VII.1 only

92231

u-231

yes

yes

u

ENDF/B-VII.1 only

92232

u-232

yes

yes

u

92233

u-233

yes

yes

u

92234

u-234

yes

yes

u

ENDF/B-VII.1 only

92235

u-235

yes

yes

u

92236

u-236

yes

yes

u

92237

u-237

yes

yes

u

92238

u-238

yes

yes

u

92239

u-239

yes

yes

u

92240

u-240

yes

yes

u

92241

u-241

yes

yes

u

93234

np-234

yes

yes

np

93235

np-235

ENDF/B-VII.1

yes

np

93236

np-236

ENDF/B-VII.1

yes

np

93237

np-237

yes

yes

np

93238

np-238

ENDF/B-VII.1

yes

np

93239

np-239

ENDF/B-VII.1

yes

np

94236

pu-236

ENDF/B-VII.1

yes

pu

94237

pu-237

ENDF/B-VII.1

yes

pu

94238

pu-238

yes

pu

94239

pu-239

yes

yes

pu

94240

pu-240

yes

yes

pu

94241

pu-241

yes

yes

pu

94242

pu-242

yes

yes

pu

94243

pu-243

yes

yes

pu

94244

pu-244

ENDF/B-VII.1

yes

pu

94246

pu-246

ENDF/B-VII.1

yes

pu

95240

am-240

yes

yes

am

ENDF/B-VII.1 only

95241

am-241

yes

yes

am

95242

am-242

yes

am

1095242

am-242m

yes

am

95243

am-243

yes

yes

am

95244

am-244

yes

am

1095244

am-244m

yes

am

96240

cm-240

yes

yes

cm

ENDF/B-VII.1 only

96241

cm-241

ENDF/B-VII.1

yes

cm

96242

cm-242

yes

yes

cm

96243

cm-243

ENDF/B-VII.1

yes

cm

96244

cm-244

ENDF/B-VII.1

yes

cm

96245

cm-245

ENDF/B-VII.1

yes

cm

96246

cm-246

ENDF/B-VII.1

yes

cm

96247

cm-247

ENDF/B-VII.1

yes

cm

96248

cm-248

yes

yes

cm

96249

cm-249

ENDF/B-VII.1

yes

cm

96250

cm-250

ENDF/B-VII.1

yes

cm

97245

bk-245

yes

yes

bk

ENDF/B-VII.1 only

97246

bk-246

yes

yes

bk

ENDF/B-VII.1 only

97247

bk-247

yes

yes

bk

ENDF/B-VII.1 only

97248

bk-248

yes

yes

bk

ENDF/B-VII.1 only

97249

bk-249

ENDF/B-VII.1

yes

bk

97250

bk-250

ENDF/B-VII.1

yes

bk

98246

cf-246

yes

yes

cf

ENDF/B-VII.1 only

98248

cf-248

yes

yes

cf

ENDF/B-VII.1 only

98249

cf-249

ENDF/B-VII.1

yes

cf

98250

cf-250

yes

yes

cf

98251

cf-251

yes

yes

cf

98252

cf-252

yes

yes

cf

98253

cf-253

ENDF/B-VII.1

yes

cf

98254

cf-254

ENDF/B-VII.1

yes

cf

99251

es-251

yes

yes

es

ENDF/B-VII.1 only

99252

es-252

yes

yes

es

ENDF/B-VII.1 only

99253

es-253

ENDF/B-VII.1

yes

es

99254

es-254

ENDF/B-VII.1

yes

es

1099254

es-254m

yes

yes

es

ENDF/B-VII.1 only

99255

es-255

ENDF/B-VII.1

yes

es

100255

fm-255

yes

yes

fm

a Yield data are only available in coupled MG libraries and in the CE libraries.

b Narrow and/or intermediate resonance factors are only available on MG libraries.

c Incident gamma cross sections are only available on coupled MG libraries. A separate incident gamma CE library is available

Table 10.1.2 Isotopes with no ENDF/B-VII.0 or -VII.1 nuclear data.

Element

SCALE standard composition ID

Missing Isotopes

ZA numbers

% Abundance

oxygen

8000

18

8018

0.20

neon

10000

21, 22

10021, 10022

0.27, 9.25

ytterbium

70000

All(1)

(1)

osmium

76000

All(2)

(2)

platinum

78000

All(3)

(3)

tantalum

73000

180m

1073180

0.01

  1. no data for any of the 7 naturally-occurring ytterbium isotopes

  2. no data for any of the 7 naturally-occurring osmium isotopes

  3. no data for any of the 6 naturally-occurring platinum isotopes

Table 10.1.3 Temperatures at which thermal moderator data are availablea.

ID

Name

Temperatures

1001

h-1

293.6 350.0 400.0 450.0 500.0 550.0 600.0 650.0 800.0

1001001

h-liquid_ch4

100.0

2001001

h-solid_ch4

22.0

4001001

h-cryo_ortho

20.0

5001001

h-cryo_para

20.0

6001001

h-benzene

296.0 350.0 400.0 450.0 500.0 600.0 800.0 1000.0

7001001

h-zrh2

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

9001001

h-poly

296.0 350.0

1002

h-2

293.6 350.0 400.0 450.0 500.0 550.0 600.0 650.0

4001002

d-cryo_ortho

19.0

5001002

d-cryo_para

19.0

3004009

bebound

296.0 400.0 500.0 600.0 700.0 800.0001 1000.0 1200.0

5004009

be-beo

293.6 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

3006000

c-graphite

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0 1600.0 2000.0

5006000

h-benzene

296.0 350.0 400.0 450.0 500.0 600.0 800.0 1000.0

5008016

o-beo

293.6 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

1013027

albound

20.0 80.0 293.6 400.0 600.0 800.0

1014028a

sibound

293.6 350.0 400.0 500.0 800.0 1000.0 1200.0

1014029a

sibound

293.6 350.0 400.0 500.0 800.0 1000.0 1200.0

1014030a

sibound

293.6 350.0 400.0 500.0 800.0 1000.0 1200.0

1026000

febound

20.0 80.0 293.6 400.0 600.0 800.0

1040090

zr90-zr5h8

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

1040091

zr90-zr5h8

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

1040092

zr90-zr5h8

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

1040093

zr90-zr5h8

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

1040094

zr90-zr5h8

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

1040095

zr90-zr5h8

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

1040096

zr90-zr5h8

296.0 400.0 500.0 600.0 700.0 800.0 1000.0 1200.0

a) only available in ENDF/B-VII.1

Table 10.1.4 Standard SCALE cross section libraries.

Mnemonic names

Primary data source/format

Last field of cross section library filename

v7.1-252

v7.1-252n

ENDF/B-VII.1

252-group neutron

xn252v7.1

v8.0-252

ENDF/B-VIII.0 252-group neutron library

xn252v8.0

v7-56

v7-56n

v7.1-56n

ENDF/B-VII.1 56-group

neutron library

xn56v7.1

test-8grp

TEST LIBRARY 8-group ENDF/B-VII.1 neutron library

test8g_v7.1

v7.1-200n47g

ENDF/B-VII.1 200 neutron/47 gamma library

xn200g47v7.1

v8.0-200n47g

ENDF/B-VIII.0 200 neutron/47 gamma library

xn200g47v8.0

v7.1-28n19g

ENDF/B-VII.1 28 neutron/19 gamma library

xn28g19v7.1

v8.0-28n19g

ENDF/B-VIII.0 28 neutron/19 gamma library

xn28g19v8.0

ce_v7.1_endf

ENDF/B-VII.1 Continuous-energy neutron and gamma library

ce_v8_endf

ce_v8.0

ENDF/B-VIII.0 Continuous-energy neutron and gamma library

xn302

fine_fast_e7.1

ENDF/B-VII.1 302-group neutron library

fine_fast_e8.0

ENDF/B-VIII.0 302-group neutron library

v7.1-1597

vfine_e7.1

ENDF/B-VII.1 1597-group neutron library

v8.0-1597

vfine_e8.0

ENDF/B-VIII.0 1597-group neutron library

Additional convenience mnemonics are also available to always alias to the most recent nuclear data libraries for the intended purpose. The mnemonics shown in Table 10.1.2 will allow the use of the same input files with this and future versions of SCALE, but will always access the most recent nuclear data libraries and group structures.

Table 10.1.5 SCALE convenience mnemonics.

Mnemonic name

Aliased library

broad_lwr

xn56v7.1

fine_therm

xn252v7.1

ce

ce_v7.1_endf

ce.xml

ce_v7.1_endf.xml

test_n

test8g_v7.1

10.1.2. Description of the SCALE Cross Section Libraries

10.1.2.1. The 238-group and 252-group ENDF/B-VII libraries (V7-238, v7-252)

SCALE includes a fine group structure for criticality safety and reactor physics applications: a 252-group library structure based on either ENDF/B-VII.1 or ENDF/B-VIII.0 is available for either criticality safety or reactor physics. Table 10.1.8, shows the group structure for the 252 fine-group libraries. The 252-group structure was developed to adequately capture spectral and temperature effects important for reactor systems and was processed with newer, improved procedures.

The SCALE control sequences for criticality safety and reactor physics applications normally perform self-shielding of the fine-group libraries using the BONAMI module for the unresolved resonance range; and the CENTRM/PMC modules for the resolved resonance/thermal range. However the 252-group libraries include Bondarenko self-shielding factors for the entire energy range, which provides the option of using the Bondarenko method to self-shield both the resolved and unresolved resonance ranges, as an alternative to the more rigorous (and computationally intensive) CENTRM/PMC approach. As discussed in the following section, one objective of the ENDF/B-VII.1 and ENDF/B-VIII.0 252-group and 56-group libraries was to provide a more accurate Bondarenko treatment for the resolved resonance range.

10.1.2.1.1. Differences in the 238-group and 252-group libraries

The standard weighting function described in Table 10.1.6 is typically used to create MG data for all materials in a library, and Bondarenko shielding factors can be computed using the narrow resonance (NR) approximation for the flux spectrum: \(\sigma\)t+ \(\sigma\)0)*C(E) where \(\sigma\)0 is the background cross section, and C(E) is the standard weight function. Bondarenko factors are tabulated at temperatures of at 293 K, 565 K, 600 K, 900 K, 1200 K, 2000 K, and 2400 K in the 252-group library.

Table 10.1.6 Standard weighting function for processing MG data.

Energy Range

Standard Weight Function

10-5 eV - 0.1 eV

Maxwellian, with peak at 0.025 eV

0.1 eV - 80 keV

1/E

80 keV - 10 MeV

Watt Fission spectrum at temperature of 1.273 MeV

10 MeV -20 MeV

1/E

Several enhancements were made in the MG processing procedures used to produce the 252-group library so that it would be more applicable to reactor physics as well as criticality safety applications. Some of the improvements in the 252-group library compared to the SCALE-6.2 238-group library are given below

(a) The base weighting function for processing MG data of actinide materials (Z>89) was computed by the PW transport code CENTRM for a PWR lattice at 300 K. This approach provides more representative weighted 2D scattering matrices for most cases of interest. The standard weighting function is still used for materials with Z<90.

(b) The thermal energy range which includes up-scattering reactions was extended to 5 eV, compared to 3 eV in the SCALE 6.2 238-group library

(c) Temperature-dependent thermal-scattering matrices for water-bound H, O-16, and actinide materials were processed with temperature-dependent thermal flux spectra obtained from CENTRM calculations for a PWR pincell. Actinide and O-16 MG thermal scattering kernels were weighted with the fuel zone flux at temperatures of 293 K, 600 K, 900 K, 1200 K, and 2400 K, and the water scatter kernels were weighted with the moderator flux at 293 K, 500 K, 600 K, 650 K, 900 K, and 1200 K. In the SCALE 6.2 238-group library, thermal scattering matrices at all temperatures were weighted with a temperature-independent Maxwellian spectrum.

(d) Group-dependent IR parameters (“lambdas”) were calculated for all materials and are included in the 252-group libraries. This allows the Bondarenko self-shielding method in SCALE to use the IR approximation for the 252-group libraries, while the SCALE 6.2 238-group library was limited to the NR approximation.

(e) A number of improvements were made in processing of Bondarenko self-shielding data.

  • The number of temperatures for the Bondarenko factors was increased. Shielding factors are tabulated at temperatures 292 K, 600 K, 900 K, 1200 K, and 2400 K for the 252-group libraries.

  • In addition to the Bondarenko factors normally included for capture, fission, elastic, and total cross sections, self-shielding factors are also included for the multigroup elastic within-group cross section to address the impact of resonance reactions on the scattering distribution.

  • In the unresolved resonance range, self-shielding factors were calculated using probability tables.

  • Bondarenko factors for nuclides with atomic masses Z>39 were calculated with CENTRM PW flux spectra rather than the analytical NR approximation. Two types of CENTRM models were used. Heterogeneous models of water-moderated lattices spanning the range of expected self-shielding were used to calculate shielding factors for 235U, 238U, 239Pu, 240Pu, 241Pu, 90Zr, and 96Zr. The CENTRM transport calculations were performed using the method of characteristics method for 2D unit cell models. Homogeneous models were used to compute shielding factors for the remaining nuclides with Z>39. These CENTRM calculations were performed for homogeneous media containing the absorber material mixed with hydrogen, and the hydrogen concentration was varied to obtain the desired set of background cross sections. Table 10.1.7 summarizes the processing options for the 252-group library.

Table 10.1.7 Standard weighting functions for processing 252-group library data library.

Nuclide

Base Weight Function

Bondarenko Factor

U-238, -235; Pu-239, -240, -241

PWR spectrum

CENTRM heterogeneous calculations

Other actinides Z>90

PWR spectrum

CENTRM homogeneous calculations

39<Z<90

standard

CENTRM homogeneous calculations

Z<40

standard

NR analytical spectrum

Table 10.1.8 252 Multigroup energy structure (5 eV thermal boundary).

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

1

2.000E+07

43

1.490E+05

85

1.877E+02

2

1.733E+07

44

1.283E+05

86

1.800E+02

3

1.568E+07

45

1.000E+05

87

1.700E+02

4

1.455E+07

46

8.500E+04

88

1.430E+02

5

1.384E+07

47

8.200E+04

89

1.220E+02

6

1.284E+07

48

7.500E+04

90

1.190E+02

7

1.000E+07

49

7.300E+04

91

1.175E+02

8

8.187E+06

50

6.000E+04

92

1.160E+02

9

6.434E+06

51

5.200E+04

93

1.130E+02

10

4.800E+06

52

5.000E+04

94

1.080E+02

11

4.304E+06

53

4.500E+04

95

1.050E+02

12

3.000E+06

54

3.000E+04

96

1.012E+02

13

2.479E+06

55

2.000E+04

97

9.700E+01

14

2.354E+06

56

1.700E+04

98

9.000E+01

15

1.850E+06

57

1.300E+04

99

8.170E+01

16

1.500E+06

58

9.500E+03

100

8.000E+01

17

1.400E+06

59

8.030E+03

101

7.600E+01

18

1.356E+06

60

5.700E+03

102

7.200E+01

19

1.317E+06

61

3.900E+03

103

6.750E+01

20

1.250E+06

62

3.740E+03

104

6.500E+01

21

1.200E+06

63

3.000E+03

105

6.300E+01

22

1.100E+06

64

2.500E+03

106

6.100E+01

23

1.010E+06

65

2.250E+03

107

5.800E+01

24

9.200E+05

66

2.200E+03

108

5.340E+01

25

9.000E+05

67

1.800E+03

109

5.060E+01

26

8.750E+05

68

1.550E+03

110

4.830E+01

27

8.611E+05

69

1.500E+03

111

4.520E+01

28

8.200E+05

70

1.150E+03

112

4.400E+01

29

7.500E+05

71

9.500E+02

113

4.240E+01

30

6.790E+05

72

6.830E+02

114

4.100E+01

31

6.700E+05

73

6.700E+02

115

3.960E+01

32

6.000E+05

74

5.500E+02

116

3.910E+01

33

5.730E+05

75

3.050E+02

117

3.800E+01

34

5.500E+05

76

2.850E+02

118

3.763E+01

35

4.920E+05

77

2.400E+02

119

3.727E+01

36

4.700E+05

78

2.200E+02

120

3.713E+01

37

4.400E+05

79

2.095E+02

121

3.700E+01

38

4.200E+05

80

2.074E+02

122

3.600E+01

39

4.000E+05

81

2.020E+02

123

3.550E+01

40

3.300E+05

82

1.930E+02

124

3.500E+01

41

2.700E+05

83

1.915E+02

125

3.375E+01

42

2.000E+05

84

1.885E+02

126

3.325E+01

127

3.175E+01

169

2.470E+00

211

7.500E-01

128

3.125E+01

170

2.380E+00

212

7.000E-01

129

3.000E+01

171

2.300E+00

213

6.500E-01

130

2.750E+01

172

2.210E+00

214

6.250E-01

131

2.500E+01

173

2.120E+00

215

6.000E-01

132

2.250E+01

174

2.000E+00

216

5.500E-01

133

2.175E+01

175

1.940E+00

217

5.000E-01

134

2.120E+01

176

1.860E+00

218

4.500E-01

135

2.050E+01

177

1.770E+00

219

4.000E-01

136

2.000E+01

178

1.680E+00

220

3.750E-01

137

1.940E+01

179

1.590E+00

221

3.500E-01

138

1.850E+01

180

1.500E+00

222

3.250E-01

139

1.700E+01

181

1.450E+00

223

3.000E-01

140

1.600E+01

182

1.400E+00

224

2.750E-01

141

1.440E+01

183

1.350E+00

225

2.500E-01

142

1.290E+01

184

1.300E+00

226

2.250E-01

143

1.190E+01

185

1.250E+00

227

2.000E-01

144

1.150E+01

186

1.225E+00

228

1.750E-01

145

1.000E+01

187

1.200E+00

229

1.500E-01

146

9.100E+00

188

1.175E+00

230

1.250E-01

147

8.100E+00

189

1.150E+00

231

1.000E-01

148

7.150E+00

190

1.140E+00

232

9.000E-02

149

7.000E+00

191

1.130E+00

233

8.000E-02

150

6.875E+00

192

1.120E+00

234

7.000E-02

151

6.750E+00

193

1.110E+00

235

6.000E-02

152

6.500E+00

194

1.100E+00

236

5.000E-02

153

6.250E+00

195

1.090E+00

237

4.000E-02

154

6.000E+00

196

1.080E+00

238

3.000E-02

155

5.400E+00

197

1.070E+00

239

2.530E-02

156

5.000E+00

198

1.060E+00

240

1.000E-02

157

4.700E+00

199

1.050E+00

241

7.500E-03

158

4.100E+00

200

1.040E+00

242

5.000E-03

159

3.730E+00

201

1.030E+00

243

4.000E-03

160

3.500E+00

202

1.020E+00

244

3.000E-03

161

3.200E+00

203

1.010E+00

245

2.500E-03

162

3.100E+00

204

1.000E+00

246

2.000E-03

163

3.000E+00

205

9.750E-01

247

1.500E-03

164

2.970E+00

206

9.500E-01

248

1.200E-03

165

2.870E+00

207

9.250E-01

249

1.000E-03

166

2.770E+00

208

9.000E-01

250

7.500E-04

167

2.670E+00

209

8.500E-01

251

5.000E-04

168

2.570E+00

210

8.000E-01

252

1.000E-04

1.000E-05

10.1.2.2. The 56-group library

An ENDF/B-VII.1 and an ENDF/B-VIII.0 broad group library with 56 energy groups are available mainly for light water reactor physics calculations. The group structure is shown in Table 10.1.9. This library was processed using the same PW flux spectra used to generate the 252-group libraries (i.e., for a PWR fuel lattice). This library includes the same materials and properties as the 252-group library, and the data were computed in the same manner, except for several specially weighted nuclides which have heterogeneous Bondarenko shielding factors (in addition to those given in Table 10.1.4) computed for specific LWR components. These are summarized in Table 10.1.10.

Table 10.1.9 56-Group energy structure (5 eV thermal boundary).

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

1

2.0000E+07

24

1.0500E+02

47

2.0000E-01

2

6.4340E+06

25

1.0120E+02

48

1.5000E-01

3

4.3040E+06

26

6.7500E+01

49

1.0000E-01

4

3.0000E+06

27

6.5000E+01

50

8.0000E-02

5

1.8500E+06

28

3.7130E+01

51

6.0000E-02

6

1.5000E+06

29

3.6000E+01

52

5.0000E-02

7

1.2000E+06

30

2.1750E+01

53

4.0000E-02

8

8.6110E+05

31

2.1200E+01

54

2.5300E-02

9

7.5000E+05

32

2.0500E+01

55

1.0000E-02

10

6.0000E+05

33

7.0000E+00

56

4.0000E-03

11

4.7000E+05

34

6.8750E+00

1.0000E-05

12

3.3000E+05

35

6.5000E+00

13

2.7000E+05

36

6.2500E+00

14

2.0000E+05

37

5.0000E+00

15

5.0000E+04

38

1.1300E+00

16

2.0000E+04

39

1.0800E+00

17

1.7000E+04

40

1.0100E+00

18

3.7400E+03

41

6.2500E-01

19

2.2500E+03

42

4.5000E-01

20

1.9150E+02

43

3.7500E-01

21

1.8770E+02

44

3.5000E-01

22

1.1750E+02

45

3.2500E-01

23

1.1600E+02

46

2.5000E-01

Table 10.1.10 Speciality nuclides with special shielding factors(*) in 56-group library.

Nuclide

ID

Component configuration used to compute Bondarenko factors

Zr-91

10040091

standard library weighting

Zr-96

10040096

standard library weighting

Zr-91

40091

LWR lattice cladding, with U238 resonance interference

Zr-96

40096

LWR lattice cladding, with U238 resonance interference

Ag-107

47107

PWR Ag-In-Cd control rod

Ag-109

47109

PWR Ag-In-Cd control rod

In-113

49113

PWR Ag-In-Cd control rod

In-115

49115

PWR Ag-In-Cd control rod

Cd-113

48113

PWR Ag-In-Cd control rod

10.1.2.3. The test-8grp library for code testing

The library named test-8grp is used for code testing and verification of reproducibility. It was collapsed from the fine-group v7-252 library, using the standard weight functions in Table 10.1.6. This library has all the nuclides and same types of nuclear data as in the v7-252 library; but the eight energy-group structure provides capability to test codes and input in shorter times than with the standard production libraries. Table 10.1.11 gives the eight group structure, which has four thermal groups below 3 eV, and four fast groups.

The library can also be used with the CENTRM/PMC resonance shielding methodology.

Important

THIS LIBRARY SHOULD NOT BE USED FOR REAL APPLICATIONS.

Table 10.1.11 8-Group energy structure

Group

Upper energy (eV)

1

2.000E+07

2

8.200E+05

3

2.000E+04

4

1.050E+02

5

5.000E+00

6

6.250E-01

7

1.500E-01

8

4.000E-01

1.000E-05

10.1.2.4. The 200N-47G (V7-200N47G) library for shielding

A coupled fine-group neutron-gamma library based on ENDF/B-VII.1 is available for radiation transport calculations with SCALE shielding modules. The 200 neutron and 47 gamma energy group structures are provided in Table 10.1.12 and Table 10.1.13, respectively. The neutron group structure is identical to the 199-group VITAMIN-B6 [XSLibWDP+09] structure except that an additional group has been added to extend the top energy boundary to 20 MeV. The MG neutron data were generated using the standard weighting function described in Table 10.1.6, and the MG photon data were weighted with a flat spectrum with roll-offs. Full-range Bondarenko factors are provided for all nuclides, and the default self-shielding method for this library is to use BONAMI for all energy groups, enabling faster neutron resonance self-shielding calculations. The Bondarenko shielding factors for all nuclides are computed with the NR approximation. If the Bondarenko approach is not appropriate, self-shielding calculations can be done with the CENTRM module. The 200n-47g libraries have dose factor and response function data shown in Table 10.1.14 which are consistent with previous SCALE shielding libraries.

The fine-group coupled libraries were validated by performing radiation transport calculations with the SCALE shielding sequence MAVRIC for several shielding benchmark calculations [XSLibWDP+09]. The calculated results for transmission/attenuation values and spectral results matched experimental measurements well. Overall, the results obtained with using the 200n-47g coupled library demonstrate the effectiveness of the SCALE methods and data for shielding applications.

Table 10.1.12 Energy boundaries for the 200 neutron group structure.

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

2.0000E+07 1.9640E+07 1.7332E+07 1.6905E+07 1.6487E+07 1.5683E+07 1.4918E+07 1.4550E+07 1.4191E+07 1.3840E+07 1.3499E+07 1.2840E+07 1.2523E+07 1.2214E+07 1.1618E+07 1.1052E+07 1.0513E+07 1.0000E+07 9.5123E+06 9.0484E+06 8.6071E+06 8.1873E+06 7.7880E+06 7.4082E+06 7.0469E+06 6.7032E+06 6.5924E+06 6.3763E+06 6.0653E+06 5.7695E+06 5.4881E+06 5.2205E+06 4.9659E+06 4.7237E+06 4.4933E+06 4.0657E+06 3.6788E+06 3.3287E+06 3.1664E+06 3.0119E+06 2.8651E+06

42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82

2.7253E+06 2.5924E+06 2.4660E+06 2.3852E+06 2.3653E+06 2.3457E+06 2.3069E+06 2.2313E+06 2.1225E+06 2.0190E+06 1.9205E+06 1.8268E+06 1.7377E+06 1.6530E+06 1.5724E+06 1.4957E+06 1.4227E+06 1.3534E+06 1.2874E+06 1.2246E+06 1.1648E+06 1.1080E+06 1.0026E+06 9.6164E+05 9.0718E+05 8.6294E+05 8.2085E+05 7.8082E+05 7.4274E+05 7.0651E+05 6.7206E+05 6.3928E+05 6.0810E+05 5.7844E+05 5.5023E+05 5.2340E+05 4.9787E+05 4.5049E+05 4.0762E+05 3.8774E+05 3.6883E+05

83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123

3.3373E+05 3.0197E+05 2.9849E+05 2.9721E+05 2.9452E+05 2.8725E+05 2.7324E+05 2.4724E+05 2.3518E+05 2.2371E+05 2.1280E+05 2.0242E+05 1.9255E+05 1.8316E+05 1.7422E+05 1.6573E+05 1.5764E+05 1.4996E+05 1.4264E+05 1.3569E+05 1.2907E+05 1.2277E+05 1.1679E+05 1.1109E+05 9.8037E+04 8.6517E+04 8.2503E+04 7.9499E+04 7.1998E+04 6.7379E+04 5.6562E+04 5.2475E+04 4.6309E+04 4.0868E+04 3.4307E+04 3.1828E+04 2.8501E+04 2.7000E+04 2.6058E+04 2.4788E+04 2.4176E+04

124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164

2.3579E+04 2.1875E+04 1.9305E+04 1.5034E+04 1.1709E+04 1.0595E+04 9.1188E+03 7.1017E+03 5.5308E+03 4.3074E+03 3.7074E+03 3.3546E+03 3.0354E+03 2.7465E+03 2.6126E+03 2.4852E+03 2.2487E+03 2.0347E+03 1.5846E+03 1.2341E+03 9.6112E+02 7.4852E+02 5.8295E+02 4.5400E+02 3.5357E+02 2.7536E+02 2.1445E+02 1.6702E+02 1.3007E+02 1.0130E+02 7.8893E+01 6.1442E+01 4.7851E+01 3.7266E+01 2.9023E+01 2.2603E+01 1.7604E+01 1.3710E+01 1.0677E+01 8.3153E+00 6.4760E+00

165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200

5.0435E+00 3.9279E+00 3.0590E+00 2.3824E+00 1.8554E+00 1.4450E+00 1.3000E+00 1.1253E+00 1.0800E+00 1.0400E+00 1.0000E+00 8.7643E-01 8.0000E-01 6.8256E-01 6.2506E-01 5.3158E-01 5.0000E-01 4.1399E-01 3.6680E-01 3.2500E-01 2.7500E-01 2.2500E-01 1.8400E-01 1.5000E-01 1.2500E-01 1.0000E-01 7.0000E-02 5.0000E-02 4.0000E-02 3.0000E-02 2.1000E-02 1.4500E-02 1.0000E-02 5.0000E-03 2.0000E-03 5.0000E-04 1.0000E-05

Table 10.1.13 Energy boundaries for the 47 gamma group structure.

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

1 2 3 4 5 6 7 8 9 10

2.0000E+07 1.4000E+07 1.2000E+07 1.0000E+07 8.0000E+06 7.5000E+06 7.0000E+06 6.5000E+06 6.0000E+06 5.5000E+06

11 12 13 14 15 16 17 18 19 20

5.0000E+06 4.5000E+06 4.0000E+06 3.5000E+06 3.0000E+06 2.7500E+06 2.5000E+06 2.3500E+06 2.1500E+06 2.0000E+06

21 22 23 24 25 26 27 28 29 30

1.8000E+06 1.6600E+06 1.5700E+06 1.5000E+06 1.4400E+06 1.3300E+06 1.2000E+06 1.0000E+06 9.0000E+05 8.0000E+05

31 32 33 34 35 36 37 38 39 40

7.0000E+05 6.0000E+05 5.1200E+05 5.1000E+05 4.5000E+05 4.0000E+05 3.0000E+05 2.6000E+05 2.0000E+05 1.5000E+05

41 42 43 44 45 46 47

1.0000E+05 7.5000E+04 7.0000E+04 6.0000E+04 4.5000E+04 3.0000E+04 2.0000E+04 1.0000E+04

Table 10.1.14 Available dose functions on the coupled neutron-gamma libraries.

MAT

MT

Description

999

1

1/v total cross section normalized to 1.0 at 0.0253 eV
1/v absorption cross section normalized to 1.0 at 0.0253 eV
capture, same as MT 1 and 27

Radiative capture, same as MT 1 and 27

27

101

102

900

9032

International Commission on Radiation Units and Measurements, Report 44 (ICRU-44), Table B.3 (air) Kerma (Gy/h)/(neutron/cm2/s)

9027

Henderson conversion from neutron flux to absorbed dose rate in tissue (rad/h)/(neutrons/cm2/s)

9033

ICRU-44, Table B.3 (air) Kerma (rad/h)/(neutron/cm2/s)

9034

Ambient dose equivalent (ICRU-57, Table A.42) (Sv/h)/(neutron/cm2/s)

9035

Ambient dose equivalent (ICRU-57, Table A.42) (rem/h)/(neutron/cm2/s)

9036

Effective dose (ICRU-57, Table A.41) (Sv/h)/(neutron/cm2/s)

9037

Effective dose (ICRU-57, Table A.41) (rem/h)/(neutron/cm2/s)

9029

American National Standards Institute (ANSI) standard (1977) neutron flux-to-dose rate factors (rem/h)/(neutron/cm2/s)

9031

ANSI standard (1991) neutron flux-to-dose rate factors (rem/h)/(neutron/cm2/s)

9502

Henderson conversion factors (rad/h)/(photons/cm2/s)

9503

Claiborne-Trubey conversion factors (rad/h)/(photons/cm2/s)

9504

ANSI standard (1977) gamma flux-to-dose rate factors (rem/h)/(photons/cm2/s)

9505

ANSI standard (1991) gamma flux-to-dose rate factors (rem/h)/(photons/cm2/s)

9506

ICRU-57 Table A.21 (air) Kerma (Gy/h)/(photons/cm2/s)

9507

ICRU-57 Table A.21 (air) Kerma (rad/h)/(photons/cm2/s)

9508

Ambient dose equivalent (ICRU-57 Table A.21) (Sv/h)/(photons/cm2/s)

9509

Ambient dose equivalent (ICRU-57 Table A.21) (rem/h)/(photons/cm2/s)

9510

Effective dose (ICRU-57 Table A.17) (Sv/h)/(photons/cm2/s)

9511

Effective dose (ICRU-57 Table A.17) (rem/h)/(photons/cm2/s)

10.1.2.5. The 28N-19G shielding libraries (V7.1-28N19G)

In addition to the fine-group shielding library, SCALE has a broad-group ENDF/B-VII.1 library. The ENDF/B-VII.1 library has 28 neutron and 19 gamma groups. The change in the neutron group structure (as compared with the SCALE 6.2 27 group structure) was necessary to allow for thermal up-scatter up to 5 eV; the gamma groups are identical in both libraries. The broad-group library was primarily developed to perform adjoint discrete ordinates calculations needed to prepare importance maps and biased source distributions for biasing forward Monte Carlo shielding calculations with the fine-group libraries in the MAVRIC shielding analysis sequence. The constituents of the 278n-19g library and the processing methods are the same as the 200n-47g library. The 28 neutron and 19 gamma group structures are provided in Table 10.1.15 and Table 10.1.16, respectively. The broad-group library has the same dose factor information described in Table 10.1.14 for the fine group library.

Table 10.1.15 Energy boundaries for the 28 neutron group structure.

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

1 2 3 4 5 6

2.0000E+07 6.3763E+06 3.0119E+06 1.8268E+06 1.4227E+06 9.0718E+05

7 8 9 10 11 12

4.0762E+05 1.1109E+05 1.5034E+04 3.0354E+03 5.8295E+02 1.0130E+02

13 14 15 16 17 18

2.9023E+01 1.0677E+01 5.0000E+00 3.0590E+00 1.8554E+00 1.3000E+00

19 20 21 22 23 24

1.1253E+00 1.0000E+00 8.0000E-01 4.1399E-01 3.2500E-01 2.2500E-01

25 26 27 28

1.0000E-01 5.0000E-02 3.0000E-02 1.0000E-02 1.0000E-05

Table 10.1.16 Energy boundaries for the 19 gamma group structure.

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

Grp

Energy(eV)

1 2 3 4

2.0000E+07 1.0000E+07 8.0000E+06 6.5000E+06

5 6 7 8

5.0000E+06 4.0000E+06 3.0000E+06 2.5000E+06

9 10 11 12

2.0000E+06 1.6600E+06 1.3300E+06 1.0000E+06

13 14 15 16

8.0000E+05 6.0000E+05 4.0000E+05 3.0000E+05

17 18 19

2.0000E+05 1.0000E+05 4.5000E+04 1.0000E+04

10.1.2.6. The continuous-energy libraries

The ENDF/B-VII.1 and ENDF/B-VIII.0 CE libraries are general-purpose libraries used for both criticality calculations and shielding calculations, although the former do not use the photon data in the libraries. These libraries have CE data for the same nuclides as the MG libraries. CE data for each nuclide are stored in individual files contained in the SCALE data directory. The CE libraries were generated using AMPX to an energy-mesh tolerance of 0.1%; i.e., the data value at any intermediate energy point can be interpolated linearly within an error of 0.1%. Cross section data and kinematic data are provided for all reactions given in the ENDF evaluations and are identical to the reactions available on the MG libraries. Kinematic data are given for a range of incident energies as marginal probability distributions over the exit angles and conditional probability distributions over the exit energies in the laboratory system. Usually, 32 equiprobable exit angle bins are used for the conditional probability distribution, except if the distribution is isotropic or can be described with fewer exit angles. For elastic and discrete inelastic reaction, a larger number of exit angles are used as needed to accurately describe the kinematic in the laboratory system. Gamma production kinematic data are provided if available for nuclides that provide gamma production kinematic data. If gamma production data are present, sections for each discrete photon and the continuum are given along with the yield for each of the section. The incident neutron CE libraries are generated at temperature 293 K, 565 K, 600 K, 900 K, 1200 K, 200 K, and 2400 K. The kinematic data are not temperature dependent except for thermal moderators, which are included at the temperatures provided by the evaluator (see Table 10.1.3 for a list of thermal moderator nuclides and the list of available temperatures). Probability tables for the unresolved resonance range are provided, if the evaluations included unresolved resonance data [XSLibDL04]. Probability tables are available at 293 K, 565 K, 600 K, 900 K, 1200 K, and 2400 K. For neutron transport calculations, the CE cross sections and thermal kernels are automatically interpolated to the specified temperature using the methods described in [XSLibWDP+09].

For use in CE_MONACO, CE libraries for incident gammas are also available, based on ENDF/B-VII.1 ENDF/B-VIII.0 data, respectively. Only temperature independent cross section and kinematic data are available in the incident gamma libraries.

10.1.2.7. Gleaning Data from the Multigroup Libraries

As mentioned in Section 11.1, “AMPX LIBRARY UTILITY MODULES,” the AMPX module rade can be used to print useful information, such as the available neutron targets, neutron energy group structure, and gamma energy group structure (when present). Please see the AMPX manual :cite: XSL-wiarda_ampx-2000_2015 for more detailed instructions explaining the input for the relevant AMPX modules.

References

XSLibCHO+11

M.B. Chadwick, M. Herman, P. Obložinský, M.E. Dunn, Y. Danon, A.C. Kahler, D.L. Smith, B. Pritychenko, G. Arbanas, R. Arcilla, R. Brewer, D.A. Brown, R. Capote, A.D. Carlson, Y.S. Cho, H. Derrien, K. Guber, G.M. Hale, S. Hoblit, S. Holloway, T.D. Johnson, T. Kawano, B.C. Kiedrowski, H. Kim, S. Kunieda, N.M. Larson, L. Leal, J.P. Lestone, R.C. Little, E.A. McCutchan, R.E. MacFarlane, M. MacInnes, C.M. Mattoon, R.D. McKnight, S.F. Mughabghab, G.P.A. Nobre, G. Palmiotti, A. Palumbo, M.T. Pigni, V.G. Pronyaev, R.O. Sayer, A.A. Sonzogni, N.C. Summers, P. Talou, I.J. Thompson, A. Trkov, R.L. Vogt, S.C. van der Marck, A. Wallner, M.C. White, D. Wiarda, and P.G. Young. ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data. Nuclear Data Sheets, 112(12):2887–2996, 2011. URL: https://www.sciencedirect.com/science/article/pii/S009037521100113X, doi:https://doi.org/10.1016/j.nds.2011.11.002.

XSLibDAB18

et al. D.A. Brown. ENDF/B-VIII.0: The 8th Major Release of the Nuclear Reaction Data Library with CIELO-project Cross Sections, New Standards and Thermal Scattering Data. Nuclear Data Sheets, 148(12):1–142, 2018. URL: https://www.sciencedirect.com/science/article/pii/S0090375218300206, doi:https://doi.org/10.1016/j.nds.2018.02.001.

XSLibDL04

M. E. Dunn and L. C. Leal. Calculating probability tables for the unresolved-resonance region using Monte Carlo methods. Nuclear science and engineering, 148(1):30–42, 2004. Publisher: Taylor & Francis.

XSLibHCML16

Shane WD Hart, Cihangir Celik, G. Ivan Maldonado, and Luiz Leal. Creation of problem-dependent Doppler-broadened cross sections in the KENO Monte Carlo code. Annals of Nuclear Energy, 88:49–56, 2016.

XSLibWDP+09(1,2,3)

Dorothea Wiarda, Michael E. Dunn, Douglas E. Peplow, Thomas M. Miller, and Hatice Akkurt. Development and Testing of Endf/b-vi. 8 and Endf/b-vii. 0 Coupled Neutron-gamma Libraries for Scale 6. Technical Report ORNL/TM-2008/047, Oak Ridge National Laboratory, Oak Ridge, TN (USA), 2009.

XSLibWWCD15

Dorothea Wiarda, Mark L. Williams, Cihangir Celik, and Michael E. Dunn. AMPX: A Modern Cross Section Processing System for Generating Nuclear Data Libraries. Technical Report, Oak Ridge National Laboratory, Charlotte, NC (USA), 9 2015.