Argonne National Laboratory
Reduced Enrichment for Research and Test Reactors
Nuclear Science and Engineering Division at Argonne
U.S. Department of Energy

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Abstracts and Available Papers Presented at the
2002 International RERTR Meeting


Yu. V. Petrov, A. N. Erykalov and M. S. Onegin

Petersburg Nuclear Physics Institute of RAS
188350, Gatchina, Leningrad district, Russia


A neutron feasibility study for HEU (90%)-MEU (36%) conversion of the reactor PIK was performed. The weak absorbing aluminum matrix was proposed in meat of the new   PIK-2 FE instead of copper in reference case of standard PIK. The stainless steel cladding was left the same. For the additional gain in reactivity the stainless steel vessel and housing were changed for aluminum ones. The neutronics of the full scale computer model of PIK reactor core was computed with Russian Monte Carlo code MCU PR. Calculations show that a uranium density of 3.64 gU/cm3 of MEU (36%) fuel leads to better core parameters. Compared to reference case, the PIK-2 FE with MEU fuel and 1/3 lower loading by 235U have a longer equilibrium fuel cycle (27 fpd instead of 24 fpd) and higher burnup (37.3% instead of 23.7%). Due to lower neutron absorption in aluminum vessel and housing, all thermal neutron fluxes in D2O-reflector increased about 1.4 times. The worth of control regulators increased several times. This neutronic feasibility study of fuel enrichment reduction of PIK reactor is sufficient to start the fabrication feasibility study and subsequent in-pile irradiation tests of PIK-2 FE with MEU (36%) fuel.

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Mr. Yuri V. Petrov

Professor, Principal Researcher
Petersburg Nuclear Physics Institute
188350 Gatchina
St. Petersburg, Russia
Phone:  7 (812) 714-6096
Fax:      7 (812) 713-1963
E-mail:  [email protected]

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Last modified on July 29, 2008 11:33 +0200