Impacts of data covariances on the calculated breeding ratio for CRBRP

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5867850

Liaw, J R; Collins, P J; Henryson, H II; Shenter, R E

In order to establish confidence on the data adjustment methodology as applied to LMFBR design, and to estimate the importance of data correlations in that respect, an investigation was initiated on the impacts of data covariances on the calculated reactor performance parameters. This paper summarizes the results and findings of such an effort specifically related to the calculation of breeding ratio for CRBRP as an illustration. Thirty-nine integral parameters and their covariances, including k/sub eff/ and various capture and fission reaction rate ratios, from the ZEBRA-8 series and four ZPR physics benchmark assemblies were used in the least-squares fitting processes. Multigroup differential data and the sensitivity coefficients of those 39 integral parameters were generated by standard 2-D diffusion theory neutronic calculational modules at ANL. Three differential data covariance libraries, all based on ENDF/B-V evaluations, were tested in this study.

• Research Organization: Argonne National Lab., IL (USA); Hanford Engineering Development Lab., Richland, WA (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5867850
• Report Number(s): CONF-831047-25; ON: DE83014715
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210500* -- Power Reactors
Breeding
BREEDER REACTORS
BREEDING RATIO
CLINCH RIVER BREEDER REACTOR
CONVERSION RATIO
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
KINETICS
LIQUID METAL COOLED REACTORS
LMFBR TYPE REACTORS
NUCLEAR DATA COLLECTIONS
POWER REACTORS
REACTOR KINETICS
REACTORS
SODIUM COOLED REACTORS