|Program name||Package id||Status||Status date|
|Package ID||Orig. computer||Test computer|
|PSR-0233/01||DEC VAX 6000||DEC VAX 6000|
LSL-M2 adjusts calculated neutron spectra to make the fluence values consistent with given neutron dosimetry measurements. The primary output is a set of values for the best estimates of damage parameter values; the solution is based on a least squares fit of all input data. Several input spectra, possibly from different irradiations, can be processed simultaneously.
In an adjustment procedure, consistency is achieved by adjusting the input data in such a manner that a weighted sum of squares of adjustments is minimized. The weights are assigned according to the input uncertainties, i.e., the larger the uncertainty, the smaller the weight. This sum, which is further modified by correlations, represents the negative logarithm of the probability of the outcome of the experiment if the adjusted values are the "true" data.
The results of the adjustment are valid only if the size of the adjustment does not exceed the input uncertainties. The user should also guard against adjustments that exceed the limitations given by the linearization of the problem.
The number of spectra times the number of energy groups may not exceed 400. The number of dosimetry measurements must not exceed 100.
To compile and link source codes and execute 8 sample problems on an IBM PC required about 2 hours. Compiling LSL-M2 required more than 30 minutes. The AT is, of course, much faster.
The following Table displays the CPU time necessary to run seven out of the eight the test cases on the VAX 6000-510 machine (running OpenVMS V6.1):
Test Case # (filename)
CPU time (seconds)
ACT: Converts from dosimeter activities to reaction rates.
CALACT: Determines calculated reaction rates from fluences and cross sections.
FLXPRO: Converts fluences, cross sections, and covariances from one group structure to another.
CROSS.XSO: Dosimetry cross section file obtained from IRDF-8 as distributed with the REAL84 exercise.
DAMAGE.XSO: Contains dpa cross sections as given in AST Standard E693-79.
SPVC.XSO: Based on the determination of fluence covariances in the ORR-PSV experiment.
LSLNUC.DAT: Obtained from the Nuclear Data Guide.
|Package ID||Status date||Status|
|PSR-0233/01||24-JUL-1995||Tested at NEADB|
D.E. Cullen and P.K. McLaughlin, "The International Reactor Dosimetry File (IRDF-85)", (April 1985).
W.L. Zijp, E.M. Zsolnay, and D.E. Cullen, "Information sheet for the REAL84 exercise", Report INDC(NDC)-166 (March 1, 1985).
R.E. Maerker, J.J. Wagschal, and B.L. Broadhead, "Development and Demonstration of an Advanced Methodology for LWR Dosimetry Applications", EPRI-NP-2188 (1981).
W.L. Zijp and J.H. Baard, "Nuclear Data Guide for Reactor Neutron Metrology, Part 1 and Part 2", ECN70/71 (1979).
|Package ID||Computer language|
IBM Personal Computer Professional Fortran, Version 1.0, is required. The VAX version runs under the VMS operating system, using the VAX FORTRAN compiler.
The code was run at RSIC under PC DOS 3.1. The VAX version was tested on a VAX 6000.
The programs were installed by NEA-DB on a DEC VAX 6000/510 computer.
The source code files for the main program (LSLM2.FOR), and of the three auxiliary programs (ACT.FOR, CALACT.FOR and FLXPRO.FOR) were compiled with the DEC FORTRAN-77 compiler. The executables were run under OpenVMS V6.1.
|File name||File description||Records|
|PSR0233_01.001||LSL-M2 Information File||408|
|PSR0233_01.002||Source file of main program LSL-M2||3723|
|PSR0233_01.003||Source file of auxiliary program ACT||1245|
|PSR0233_01.004||Source file of auxiliary program CALACT||308|
|PSR0233_01.005||Source file of auxiliary program FLXPRO||893|
|PSR0233_01.006||Command file to create the executables||9|
|PSR0233_01.007||Command file to run FLXPRO (test case #1)||20|
|PSR0233_01.008||Command file to run FLXPRO (test case #2)||16|
|PSR0233_01.009||Command file to run FLXPRO (test case #3)||16|
|PSR0233_01.010||Command file to run ACT (test case #4)||10|
|PSR0233_01.011||Command file to run FLXPRO (test case #5)||22|
|PSR0233_01.012||Command file to run CALACT (test case #6)||2|
|PSR0233_01.013||Command file to run ACT (test case #7)||20|
|PSR0233_01.014||Command file to run LSL-M2 (test case #8)||20|
|PSR0233_01.015||Master file to run LSL-M2||12|
|PSR0233_01.016||File with the reaction rates (FOR020.DAT)||46|
|PSR0233_01.017||Total fluence file (FOR022.DAT)||23|
|PSR0233_01.018||20-group averaged x-sections (FOR023.DAT)||26|
|PSR0233_01.019||Reaction rate covariances file (FOR024.DAT)||12|
|PSR0233_01.020||20-group fluence covariances (FOR025.DAT)||28|
|PSR0233_01.021||20-group x-sect. covariances (FOR026.DAT)||195|
|PSR0233_01.022||Alternative file to LSLM2.XSV||28|
|PSR0233_01.023||20-group damage x-sect. file (FOR027.DAT)||17|
|PSR0233_01.024||Adjusted fluence and reaction rates||214|
|PSR0233_01.025||Damage parameters before adjustment||44|
|PSR0233_01.026||Damage parameters after adjustment||46|
|PSR0233_01.027||Covariance matrix of residuals||71|
|PSR0233_01.028||C/E ratios and response intervals||112|
|PSR0233_01.029||Cross-sections and fluence covariance||172|
|PSR0233_01.030||Mirror output for reaction rates and fluence||69|
|PSR0233_01.031||Master file to run program ACT||9|
|PSR0233_01.032||Master file to obtain irradiation times||9|
|PSR0233_01.033||Irradiation history file||23|
|PSR0233_01.035||Activity correction file||6|
|PSR0233_01.036||File with the calculated activities||52|
|PSR0233_01.037||Nuclear data file||64|
|PSR0233_01.038||Output direction file||14|
|PSR0233_01.039||Irradiation history (output file)||23|
|PSR0233_01.040||20-group fluences file||49|
|PSR0233_01.041||File to create the input to CALACT||57|
|PSR0233_01.042||Master file for cross-sections||29|
|PSR0233_01.043||Alternative file to CROSS.PRO||30|
|PSR0233_01.044||Master file for damage parameters||8|
|PSR0233_01.045||Converts fluence energy structures||40|
|PSR0233_01.046||Master file for fluence covariances||8|
|PSR0233_01.047||ENDF/B dosimetry cross-sections library file||2061|
|PSR0233_01.048||Damage cross-sections library file||116|
|PSR0233_01.049||Fluence covariances file from SPV experiment||177|
|PSR0233_01.050||Input energy groups||12|
|PSR0233_01.052||Reference energy groups file||107|
|PSR0233_01.053||Reference spectrum in 620 energy groups||65|
|PSR0233_01.054||Output energy groups file||5|
|PSR0233_01.055||Output energy groups file||10|
Keywords: least square fit, neutron spectra, nuclear damage.