Reactivity and reaction rate ratio changes with moderator voidage in a light water high converter reactor lattice
Integral reaction rate ratios and other kinfinity-related parameters have been measured in the first three cores of the experimental program on light water high converter reactor (LWHCR) test lattices in the PROTEUS reactor. The reference tight-pitch lattice consisted of two rod types, with an average fissile-plutonium enrichment of 6% and a fuel/moderator ratio of 2.0. The moderators were H/sub 2/O, Dowtherm (simulating an H/sub 2/O voidage of 42.5%), and air (100% void). Comparisons of the measured parameters have been made with calculational results based mainly on the use of two separate codes and their associated data libraries, namely, WIMS-D and EPRI-CPM. A reconstruction of individual components of the kinfinity void coefficient has been carried out on the basis of the measured changes with voidage of the various reaction rate ratios, as well as of kinfinity itself. The subsequent more detailed comparisons between experiment and calculation should provide a useful basis for resolving the conflicting calculational results that have been reported in the past for the void coefficient characteristics of LWHCRs.
- Research Organization:
- Swiss Federal Institute for Reactor Research, 5303 Wurenlingen
- OSTI ID:
- 5952643
- Journal Information:
- Nucl. Technol.; (United States), Vol. 67:3
- Country of Publication:
- United States
- Language:
- English
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PROTEUS REACTOR
NUCLEAR REACTION KINETICS
REACTIVITY
VOID COEFFICIENT
REACTOR CORES
WATER COOLED REACTORS
AIR
BIPHENYL
COMPUTER CODES
CONTROL ELEMENTS
E CODES
MODERATORS
PHENYL ETHER
PLUTONIUM
REACTOR LATTICES
W CODES
WATER
ACTINIDES
AROMATICS
ELEMENTS
ENRICHED URANIUM REACTORS
ETHERS
FLUIDS
GASES
GRAPHITE MODERATED REACTORS
HYDROCARBONS
HYDROGEN COMPOUNDS
KINETICS
METALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
REACTIVITY COEFFICIENTS
REACTOR COMPONENTS
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
TEST REACTORS
TRANSURANIUM ELEMENTS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 - Power Reactors
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Light-Water Moderated
Nonboiling Water Cooled