In-Cell Reaction Rate Distributions and Cell-Average Reaction Rates in Fast Critical Assemblies

Autor:	S. B. Brumbach, J. M. Gasidlo
Rok vydání:	1985
Předmět:	inorganic chemicals Nuclear reaction Chemistry Fission Monte Carlo method technology industry and agriculture complex mixtures Molecular physics Nuclear physics Reaction rate Uranium-238 Uranium-235 FOIL method Plutonium-239
DOI:	10.2172/6496285
Popis:	Measurements are described for determining average values of fission rates in uranium-235, uranium-238 and plutonium-239 and capture rates in uranium-238 for heterogeneous cells used to construct fast critical assemblies. The measurements are based on irradiations of foils of uranium-238, uranium-235 and plutonium-239 with counting of fission and capture products using gamma-ray spectroscopy. Both plate and pin cells are considered. Procedures are described for inferring cell-average reaction rate values from a single foil location based on a cell using a quantity called a cell factor. Cell factors are determined from special measurements in which several foils are irradiated within a cell. Comparisons are presented between cell factors determined by measurements and by Monte Carlo calculations which lend credibility to the measurement procedures.
Databáze:	OpenAIRE
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