Authors & Affiliations
Nikolaev A.L., Uvakin M.A.
Experimental and Design Organization "GIDROPRESS", Podolsk, Russia
Uvakin M.A. – Leading Engineer-designer, Cand. Sci. (Phys.-Math.), Experimental and Design Organization "GIDROPRESS".
The numerical simulation of accident with uncontrolled withdrawal of the most efficient group of control and protection system control rods at the initial states of power levels less than minimum controlled power level were realized. Analysis of this accident were perfomed for different initial states of reactor: for critical state and for a few states with various values of subcriticality. Beginning and the end of cycle for first and stationary fuel loading were considered in calculations. All calculations were done for AES-2006 project reactor plant VVER. The most important results obtained from the multivariate calculations with various combinations of initial power level, value of subcriticality, group of control and protection system control rods, No. of fuel loading, moment of fuel cycle were analyzed in more details. Consequences on the calculation results were done in conclusions. Similarly practical significant recommendations for safety analyzes that may be used for complement traditional calculations for minimum controlled power level were proposed. The calculations were performed by KORSAR/GP code with three-dimensional model of neutron kinetics.
VVER, reactivity, minimum controlled power level, the uncontrolled withdrawal of the group
1. Programmnyy kompleks KORSAR/GP [The program complex CORSAR/GP]. Attestation passport, no. 263. Moscow, Rostekhnadzor Publ., 2012.
2. Petkevich I.G., Uvakin M.A. Analiz neopredelennostey rezul'tatov rascheta rezhima s razryvom paroprovoda na ustanovke AES-2006 po kodu KORSAR/GP s primeneniem programmy LINQUAD [Uncertainly analysis of main steam line break calcuations for AES-2006 power unit by KORSAR/GP code with LINQUAD program using]. Voprosy atomnoy nauki i tekhniki. Seriya: Fizika yadernykh reaktorov - Problems of atomic science and technology. Series: Physics of Nuclear Reactors, 2013, no. 2, pp. 51—60.
3. Sergeev I.A., Gorbarev V.A., Terekhov D.V. Apparatura kontrolya neytronnogo potoka v proekte Novovoronezhskoy AES-2 [Neutron flux monitoring equipment in the Design of Novovoronezh NPP-2]. Izvestiya vuzov. Yadernaya energetika - Proseedings of Universities. Nuclear Power Engineering, 2017, no. 3, pp. 108—120.
4. NP-001-15. Obshchie polozheniya obespecheniya bezopasnosti atomnykh stantsiy [Federal rules and regulations in the field of nuclear energy use “General safety provisions for nuclear power plants”]. Moscow, Rostekhnadzor Publ., 2015. 13 p.