Analysis of the Clean Bucklings of 1.3 Per Cent Enriched Uranium-Water Lattices
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
The experimental results on the relaxation lengths of the clean, 0.6" diameter, 1.3 per cent U235 enriched uranium-water lattices have been completed for the 2:1, 3:1, and 4:1 water to fuel volume ratios. A re-determination of the relaxation lengths of the 1.5:1 lattices as a function of the size of the assembly is presently being carried out. Similar work for the 1:1 water-uranium hexagonal lattices is awaiting the fabrication of the appropriate tube sheets. On the basis of the experimental results obtained to date, we have investigated some of the questions relating to the accuracy with which the bucklings of these water lattices can be determined. The standard method of finding the buckling of thermal reactors in the past has involved the fitting of radial flux traverses to determine the lateral reflector savings of the assembly. The method has thus far proved impractical in view of the small size of our enriched uranium-water assemblies. Experimental values are required of the reflector savings correct to about 0.1 cm as a function of loading, azimuth and distance from the source plane. The variation with azimuth is expected because of the irregular loading patterns, and radial flux harmonics will exist near the bottom and top of the assemblies. However, with the recent foil techniques perfected by Kouts and his group, it may prove feasible to use this method of analysis on some of our larger assemblies.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AC02-76CH00016
- NSA Number:
- NSA-10-006372
- OSTI ID:
- 4363786
- Report Number(s):
- BNL-1578
- Country of Publication:
- United States
- Language:
- English
Similar Records
Buckling of Light Water Lattices (.600" Diameter Rods, 1.3% and 1.15% 25)
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
22 GENERAL STUDIES OF NUCLEAR REACTORS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Analysis
BUCKLING
CONFIGURATION
CRITICAL ASSEMBLIES
Critical Assemblies
Criticality
NEUTRON FLUX
Nuclear Criticality Safety Program (NCSP)
REACTORS
Safety
URANIUM
Uranium-Water Lattices
WATER
WATER MODERATOR
22 GENERAL STUDIES OF NUCLEAR REACTORS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Analysis
BUCKLING
CONFIGURATION
CRITICAL ASSEMBLIES
Critical Assemblies
Criticality
NEUTRON FLUX
Nuclear Criticality Safety Program (NCSP)
REACTORS
Safety
URANIUM
Uranium-Water Lattices
WATER
WATER MODERATOR