LIFETIME CHARACTERISTICS AND ECONOMICS AND ECONOMICS OF SLIGHTLY ENRICHED URANIUM DIOXIDE IN WATER LATTICES. Final Report on STUDY OF SLIGHTLY-ENRICHED URANIUM-WATER LATTICES WITH HIGH CONVERSION RATIO
The fairly general use of C. H. Westcott's scheme for obtaining one- group effective cross sections especially for calculating long-term reactivity changes for low enriched uranium-fueled reactors motivated a comparison with another commonly used method, namely, MUFT and SOFOCATE. The apparentiy better agreement with plutonium critical experiments that Westcott's method yields is traced to his better Pu/sub 239/ thermal cross sections. The limitations of his method for drier and hence more epithermal spectrum cores is analyzed. Suggestions for improving the SOFOCATE, and in particular the CANDLE cross sections, are made. Thc practicai effect of West cott's method in predicting increased long-term reactivity is illustrated. It was concluded that Westcott's schemen is adequate for well-moderated reactors but that his epithermal alpha values are too optimistic and hence for drier lattices the MUFT-SOFOCATE method should be used. (auth)
- Research Organization:
- Combustion Engineering, Inc. Nuclear Div., Windsor, Conn.
- DOE Contract Number:
- AT(30-1)-2379
- NSA Number:
- NSA-16-003608
- OSTI ID:
- 4831547
- Report Number(s):
- CEND-145
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- United States
- Language:
- English
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