Session No. 1 “Physics of Nuclear Reactors and Systems with Nuclear Materials, Nuclear Safety”

28.02.2019 On February 26, 2019 the scheduled meeting of Session No. 1 “Physics of Nuclear Reactors and Systems with Nuclear Materials, Nuclear Safety” of Rostechnadzor Expert Council on Validation of Computer Codes was held in SEC NRS. At the meeting the following computer codes were accepted for review:

"PRIZMA - RISK" (FSUE “RFNC-VNIITF named after Akadem. E.I. Zababakhin”) designed for calculation of the effective multiplication factor and change in the fuel isotopic composition during burnup in VVER reactors and in the process of storage;

"TIGRIS-HEX" (NRNU MEPhI and Karpov Scientific Research Institute of Physics and Chemistry (NIFKhL) JSC) designed for neutronic calculation of the research reactor VVR-ts;

"MCU-FR" (IBRAE RAS, NRC “Kurchatov Institute”) designed for neutronic calculation of multiplication factors (and its functionals) in reactors with fast neutron spectrum, as well as of dose rate from neutron or gamma rays.

At the meeting of the Session the results of the review of the following computer codes were also addressed:

"KATRIN-2.5" (JSC OKB “GIDROPRESS”, Keldysh Institute of Applied Mathematics of RAS) designed for calculation of neutron fluence accumulation rate with the power of more than 0.5 MeV onto the supporting structures of VVER reactors;

"PROKER" ("Novovoronezh NPP" Branch of Rosenergoatom Concern JSC) designed for calculations aimed to determine neutronic characteristics of VVER reactor based on measurements made in the process of the reactor operation;

"SFuel" (NRC “Kurchatov Institute”) designed for calculation of characteristics of the irradiated nuclear fuel of VVER reactors depending on the delay time.

The developers of the computer code "DINAR" (JSC “NIKIET”), designed for simulation of steady-state, transient and emergency modes in fast neutron reactor installations with liquid-metal coolant, provided the additional verification materials, developed based on recommendations given at the previous meeting of the Session.

Mr. Zaritskiy, Chairman of the Session (NRC “Kurchatov Institute”), presented information about the results of the review of validation certificates for the computer codes "PRIZMA-2017", "KATRIN-2.5" (for BREST), "KASKAD-S-3.0" (for BREST) at the meeting of the Presidium of the Expert Council, which was held on December 26, 2019.

The last issue in the meeting agenda was information about the process of works onthe review of the computer codes "KATRIN-2.5" (for multipurpose fast neutron reactor (MBIR)), "KASKAD-S-3.0" (for multipurpose fast neutron reactor), "ENOT-MBIR", "TVS-M" (Version 1.4), "BIPR-7A" (Version 1.5), "PERMAK-A" (Version 1.5).

The Expert Council on Validation of Computer Codes was founded under the auspices of Rostechnadzor for the purpose of implementation of Article 8 of the "Procedure for Review of Computer Codes Used to Build Computer Models for Processes Effecting Safety of Nuclear Facilities and(or) Activities in the Field of Atomic Energy Use" approved by the Order of Rostechnadzor of 30.07.2018 No. 325 (registered by the Ministry of Justice of Russia on 12.11.2018 under the No. 52650). The Provision on the Expert Council was approved by the Order of Rostechnadzor No. 655 of 27.12.2018. The major tasks of the Expert Council are: evaluation of the results of computer codes review, and giving proposals on the content of draft validation certificates for computer codes.

Session No. 1 “Physics of Nuclear Reactors and Systems with Nuclear Materials, Nuclear Safety” of Rostechnadzor Expert Council hosted representatives of the following organizations: Rostechnadzor, NRC “Kurchatov Institute”, SEC NRS, Rosenergoatom Concern JSC (including the branches "Kola NPP" and "Kursk NPP"), NRNU MEPhI, JSC “VNIIAES”, JSC “Atomenergoproekt”, JSC “NIKIET”, JSC ATOMPROEKT, JSC “Afrikantov ОКВМ”, JSC OKB “GIDROPRESS”, IBRAE RAS, FSUE “Alexandrov NITI”, FSUE RFNC – VNIIEF, FSUE “RFNC-VNIITF named after Akadem. E.I. Zababakhin”, JSC “SSC RIAR”, JSC “SSC RF – IPPE”, JSC "ITCP “Proryv”, PNPI.

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