DLC-0138 ZZ-COVFILS-2-I.

1. NAME OR DESIGNATION OF PROGRAM:  ZZ-COVFILS-2-I.

3. DESCRIPTION OF PROGRAM OR FUNCTION


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  FORMAT: ENDF/B order

  NUMBER OF GROUPS: 74-group library

  NUCLIDES: H, Li-6, Be, C.

ORIGIN: ENDF/B-V (It is a subset of the Los Alamos 187-group structure used in MATXS8).

  WEIGHTING SPECTRUM: Fusion peak at high temperatures
                      Fission spectrum near 1 MeV
1/E slowing-down spectrum in the eV-keV region                       Room-temperature Maxwellian below 0.15 eV

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COVFILS-2-I is a library of multigroup neutron cross sections, scattering matrices and covariances. This 74-group library is primarily intended for use in the sensitivity and uncertainty analysis of fusion integral experiments and fusion reactor systems.

4. METHOD OF SOLUTION

COVFILS-2-I is largely based on data evaluation from the ENDF/B-V library, although some minor corrections and improvements were incorporated. In cases where the covariance evaluation is missing (as in the case of Be) or judged to be inadequate, private Los Alamos evaluations, such as LA-7932-MS, are  employed. The COVFILS-2-I group structure was chosen to give good energy resolution at high energies. It is a subset of the Los Alamos 187-group structure used in MATXS8.The groups are ordered in ENDF/B  order (low-to-high) for all vector data and for the covariance matrices. Full (P0-P3) transfer matrices in normal high-to-low order for all scattering reactions present in the library are also included. The elements included are: H, Li6, Be, C.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

6. TYPICAL RUNNING TIME

The sample problem for only one material took 14 seconds on the IBM 3033 under the MVS operating system.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS:

BOXR                Reconstructs complete matrix from compressed
                    format

10. REFERENCES

- D. W. Muir, " The Evaluation and Application of Redundant
  Cross-Section Covariances", LA-UR-86-3786-Rev (Nov. 1986)

- D.W. Muir :
  COVFILS-2 : Neutron Data and Covariances for Sensitivity and
  Uncertainty Analysis
  Fusion Technology 10(3) Part 2B, pp. 1461-1465 (November 1986)
- J.W. Davidson, D.J. Dudziak et al. :
  Recent Joint Developpements in Cross_Section Uncertainty Analysis
  at Los Alamos and EIR
  LA-UR-87-219 (Jnuary 1987)
- D.W. Muir,
  The Evaluation and Application of Redundant-Cross-Section
  Covariances.
  LA-UR-86-3786-Rev (November 1986)

11. MACHINE REQUIREMENTS:

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.
Developed by: Los Alamos National Laboratory
              Los Alamos, New Mexico, U. S. A.

File name	File description	Records
DLC0138_01.001	information file	85
DLC0138_01.002	information file in original package	172
DLC0138_01.003	BOXR FORTRAN-77 source	194
DLC0138_01.004	74-grp neutron library	16400
DLC0138_01.005	IBM JCL	16
DLC0138_01.006	Full BOXR input	987
DLC0138_01.007	Test problem BOXR input	3
DLC0138_01.008	Test problem BOXR output	26