NEA-1676 ERRORJ 2.

1. NAME OR DESIGNATION OF PROGRAM:  ERRORJ and ERRORJ2.

3. DESCRIPTION OF PROGRAM OR FUNCTION

ERRORJ produces multigroup covariance matrices from ENDF-6 format following mainly the methods of the ERRORR module in NJOY94.105.
  
NEW VERSION DIFFERS FROM PREVIOUS VERSION IN THE FOLLOWING FEATURES
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Additional features in ERRORJ with respect to the NJOY94.105/ERRORR module:
- expands processing for the covariance matrices of resolved and unresolved resonance parameters
- processes average cosine of scattering angle and fission spectrum
- treats cross-correlation between different materials and reactions
- accepts input of multigroup constants with various forms (user input, GENDF, etc.)
- outputs files with various formats through utility NJOYCOVX (COVERX format, correlation matrix, relative error and standard deviation)
- uses a 1% sensitivity method for processing of resonance parameters
- ERRORJ can process the JENDL-3.2 and 3.3 covariance matrices.
  
Additional features of the version 2 with respect to the previous version of ERRORJ:
- Since the release of version 2, ERRORJ has been modified to increase its reliability and stability,
- calculation of the correlation coefficients in the resonance region,
- Option for high-speed calculation is implemented,
- Perturbation amount is optimised in a sensitivity calculation,
- Effect of the resonance self-shielding can be considered,
- a compact covariance format (LCOMP=2) proposed by N. M. Larson can be read.
  
Additional features of the version 2.2.1 with respect to the previous version of ERRORJ:
- Several routines were modified to reduce calculation time. The new one needs shorter calculation time (50-70%) than the old version without changing results.
- In the U233 and Pu241 files of JENDL-3.3 an inconsistency between resonance parameters in MF=32 and those in MF=2 was corrected.

This version differs from the previous one (NEA-1676/05) in the following: ERRORJ2.2.1 was modified to treat the self-shielding effect accurately.

This version differs from the previous one (NEA-1676/06) in the following: ERRORJ2.2.1 was modified to reduce the calculation time and to make it easy to incorporate ERRORJ into the NJOY code system.
In May 2010, two bugs were found in the FORTRAN source. This information was documented/reported to the author.

4. METHODS

ERRORJ
- expands processing for the covariances of resolved and unresolved resonance parameters
- processes average cosine of scattering angle and fission spectrum
- it accepts input of multigroup constants with various forms (user input, GENDF, etc)
- outputs files with various formats through utility NJOYCOVX (COVERX format, correlation matrix, relative error and standard deviation)
- uses a 1% sensitivity method for processing of resonance parameters
  
ERRORJ 2
- calculation of correlation coefficients in the resonance region

Running time is case dependent. (e.g. TEST U238: 177.4s in PC-Windows/XP Intel Pentium 3.2GHz).

8. RELATED OR AUXILIARY PROGRAMS

NJOYCOVX: this program produces the coverx format file of covariance data from the output covariance file of errorr module, developed by K.Kosako (SAEI).

10. REFERENCES

- "Preparation of a Covariance Processing System for the Evaluated Nuclear Data File, JENDL ", PNC  PJ9037  97-001  (1997), PNC  TJ9037  98-001  (1998), JNC  TJ9440  99-003  (1999)
- K. Kosako: Covariance Data processing Code: ERRORJ, Specialist's  meeting of reactor constants, Tokai, February 22-23, 2001
- R.E. MacFarlane & D.W. Muir:  The NJOY Nuclear Data Processing System, Version 91.   LA-12740-M (October 1994)

- Viewgraphs: K. Kosako: Covariance Data processing Code: ERRORJ
Specialist's  meeting of reactor constants, Tokai, February 22-23, 2001
- Input instructions taken from the errorj Fortran Source
- Go Chiba:
ERRORJ - Covariance Processing Code, Version 2.2 (Manual),
JNC TN9520 2004-003 (July 2004)
- K. Shibata et al.:
JENDL-3.2 Covariance File
Proc. Nuclear Data Covariance Workshop, BNL 1999-p.111 ORNL/TM-2000/19
- T. Kawano, K. Shibata:
Evaluation of Covariances for Resolved Resonance Parameters of U-235, U-238 and
Pu-239 in JENDL-3.2 (JAERI-Research 2003-001, Feb. 2003)
- Go Shiba:
ERRORJ - A Code to Process Neutron-nuclide Reaction Cross Section Covariance,
Version 2.3 (JAEA-Data/Code 2007-007, January 2007)

ERRORJ-2.3 has been tested at the NEA Databank on on PC-linux/windows operating systems.

13. SOFTWARE REQUIREMENTS:  A Fortran 77 compiler is required to compile the codes.

NEA Data Bank tested ERRORJ-2.3 on PC-Windows/XP using Compaq Visual Fortran 6.6A and PC-linux/Fedora12 using Intel Fortran Compiler V10.1. No executables are included with the package.

15. NAME AND ESTABLISHMENT OF AUTHORS

Go Chiba
Reactor Physics Research Group
Japan Atomic Energy Agency
2-4, Shirane, Shirakata, Tokai-mura
Ibaraki, 319-1195
Japan

- Viewgraphs
- covariance file of JENDL-3.2: Mn55, Na23, Ni0, Pu239, Cr0, O16, Pu240,U233,
U238, B11, U235, B10, Fe0
- covariance file of JENDL-3.2 (newer): H1, Zr0, U238, Pu239
- utilities errorj, njoycovx, viewcvx, editcvx source programs
- shell and output files
- 19 group processed covariance matrices per element and reaction
- GENDF file used in processing ERRORJ

ERRORJ-2.2 Manual
Report on JENDL 3.2 covariance matrices
JAERI-Research 2003-001 Report
covariance files in JENDL-3.2
covariance files in JENDL-3.3
utility programs
ERRORJ source codes
shell scripts, input files, output files
njoycovx: A program to convert output file

ERRORJ-2.3 Manual
test input (including data files) and output for U238
ERRORJ source codes
njoycovx: A program to convert output file