Reference critical experiments. Progress report, October 1, 1976--December 31, 1976
Updated information for areas where benchmark measurements are needed was solicited from various organizations. This information is compiled into a new listing. Significant changes include de-emphasis in areas dealing with HTGR-type fuel cycles; priority changes are also included. Single vessel and multiple cylinder arrays surrounded by a 25.4-cm-thick concrete reflector have been completed. About 76 experiments were performed in the concrete enclosure. Monte Carlo calculations are presented for single cylinders in the concrete enclosure. These calculations, using Hansen-Roach 16-group cross section sets, were within acceptable limits of errors for dilute solution, but were 2 to 2.5 percent low in k/sub eff/ for the approximately 350 g U/liter solutions. This trend is consistent with that found for minimally reflected vessels. A 20.3-cm-thick plexiglas enclosure was constructed so that the criticality of single and multiple vessel arrays can be compared with the concrete-reflected arrays. Work continues in setting up the 4.5 percent /sup 235/U fuels experiments. 4 tables.
- Research Organization:
- Atomics International Div., Golden, CO (USA)
- DOE Contract Number:
- EY-76-C-04-3533
- OSTI ID:
- 7117263
- Report Number(s):
- RFP-NUREG-2622
- Country of Publication:
- United States
- Language:
- English
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