THERMAL NEUTRON SPECTRAL AND SPATIAL DISTRIBUTIONS IN LIGHT WATER MODERATED URANIUM LATTICES
Technical Report
·
OSTI ID:4635087
The thermal disadvantage factors for cylindrical U rods in hexagonal lattices were measured by activation techniques. Monte Carlo calculated factors obtained for these arrays with the Nelkin kernel were 4.3% lower than those obtained with the Radkowsky (free proton) kernel for a wide range of H/sub 2/O: U volume ratios. For an 8:1 ratio, the measured value agreed with the Nelkin kernel value, but for 1: 1 to 2.1, this calculated value was too high. The thermal ffux distribution measured in water poisoned with Cd was successfully calculated with the Nelkin kernel. The Radkowsky kernel gave a softer spectrum in disagreement with the measurements. (D.C.W.)
- Research Organization:
- Westinghouse Electric Co. Bettis Atomic Power Lab., Pittsburgh
- DOE Contract Number:
- AT(11-1)-GEN-14
- NSA Number:
- NSA-17-038493
- OSTI ID:
- 4635087
- Report Number(s):
- WAPD-T-1594; CONF-133-2
- Country of Publication:
- United States
- Language:
- English
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