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NEA-1139 UNC32/33.

UNC32/33, Covariance Matrices from ENDF/B-5 Resonance Parameter Uncertainties

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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1. NAME OR DESIGNATION OF PROGRAM:  UNC32/33.
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2. COMPUTERS
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Program name Package id Status Status date
UNC32/33 NEA-1139/01 Tested 09-SEP-1987

Machines used:

Package ID Orig. computer Test computer
NEA-1139/01 CDC CYBER 176 CDC CYBER 740
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3. DESCRIPTION OF PROGRAM OR FUNCTION

The programs UNC 32/33 read uncertainty information from cross-section libraries in the ENDF/B-V format (autocorrelations) and convert these uncertainty data to a group structure selected by the user. In the conversion procedure a  weighting neutron spectrum is needed.
The converted cross-section uncertainty data can be used in adjustment programs and to calculate the uncertainty in calculated reaction rates.
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4. METHOD OF SOLUTION

Straightforward application of uncertainty propagation relations.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:  None detected for the ENDF/B-V dosimetry file.
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6. TYPICAL RUNNING TIME

The calculation time expressed in system seconds is problem dependent. For the program UNC32 about 20 s and for the program UNC33 about 60 s are needed for a relatively complicated reaction.
NEA 1139/01: NEA-DB executed the test problems included in this package on a CDC CYBER 740 computer. The following CPU times were required: 91.1 seconds (UNC32); 128.5 seconds (UNC33).
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7. UNUSUAL FEATURES OF THE PROGRAM

The programs UNC32/33 are relatively small programs which make the cross-section uncertainty data available for calculations with neutron spectrum adjustment codes and/or for the calculation of the uncertainty in calculated reaction rates.
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8. RELATED AND AUXILIARY PROGRAMS

The programs UNC32/33 are accompanied by two small utility programs which can read and print the data of the direct access output files.
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9. STATUS
Package ID Status date Status
NEA-1139/01 09-SEP-1987 Tested at NEADB
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10. REFERENCES:
NEA-1139/01, included references:
- H.J. Nolthenius:
  Computer Programs for Calculating Group Cross-Section Covariances
  from Uncertainty Parameters in the ENDF/B-V Format - UNC 32/33
  ECN-202  (October 1987)
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11. MACHINE REQUIREMENTS:  Computer and line printer.
NEA-1139/01
To run the sample problems included in this package on  a CDC CYBER 740 computer, main storage requirements are: 65,224 (octal) words (UNC32); 110,623 (octal) words (UNC33).
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1139/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  CDC NOS/BE.
NEA-1139/01
NOS 2.5.1 (CDC CYBER 740) with compiler FTN5.1+650.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

          H.J. Nolthenius
          Netherlands Energy Research FoundatioN ECN
          Postbus 1
          1755 ZG Petten, Netherlands
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16. MATERIAL AVAILABLE
NEA-1139/01
File name File description Records
NEA1139_01.001 Information file 83
NEA1139_01.002 UNFM auxiliary program source 54
NEA1139_01.003 UNC32 source program (FORTRAN-77) 562
NEA1139_01.004 UNC32 sample problem input data 5
NEA1139_01.005 UNC32 sample problem printed output 756
NEA1139_01.006 U32 auxiliary program source 49
NEA1139_01.007 U32 sample problem printed output 792
NEA1139_01.008 UNC33 source program (FORTRAN-77) 745
NEA1139_01.009 UNC33 sample problem input data 105
NEA1139_01.010 UNC33 sample problem printed output 223
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17. CATEGORIES
  • M. Data Management

Keywords: correlations, covariance matrices, data uncertainties, evaluated data, multigroup theory, resonance absorption, resonance scattering.