The determination of neutron energy spectrum in reactor core C1 of reactor VR-1 Sparrow

Conference · Tue Jul 15 04:00:00 EDT 2008

OSTI ID:21113487

This contribution overviews neutron spectrum measurement, which was done on training reactor VR-1 Sparrow with a new nuclear fuel. Former nuclear fuel IRT-3M was changed for current nuclear fuel IRT-4M with lower enrichment of 235U (enrichment was reduced from former 36% to 20%) in terms of Reduced Enrichment for Research and Test Reactors (RERTR) Program. Neutron spectrum measurement was obtained by irradiation of activation foils at the end of pipe of rabit system and consecutive deconvolution of obtained saturated activities. Deconvolution was performed by computer iterative code SAND-II with 620 groups' structure. All gamma measurements were performed on Canberra HPGe. Activation foils were chosen according physical and nuclear parameters from the set of certificated foils. The Resulting differential flux at the end of pipe of rabit system agreed well with typical spectrum of light water reactor. Measurement of neutron spectrum has brought better knowledge about new reactor core C1 and improved methodology of activation measurement. (author)

• Research Organization: Argonne National Laboratory, Nuclear Engineering Division, RERTR Department, Argonne, IL (United States); Czech Technical University, Prague (Czech Republic)
• OSTI ID: 21113487
• Report Number(s): INIS-US--08N0001
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
COMPUTERS
ENERGY SPECTRA
ENRICHMENT
FOILS
IRRADIATION
ITERATIVE METHODS
MODERATELY ENRICHED URANIUM
NEUTRON SPECTRA
NEUTRONS
NUCLEAR FUELS
REACTOR CORES
TRAINING REACTORS
URANIUM 235
WATER COOLED REACTORS
WATER MODERATED REACTORS