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Title: Modeling of melt retention in EU-APR1400 ex-vessel core catcher

Abstract

A core catcher is adopted in the EU-APR1400 reactor design for management and mitigation of severe accidents with reactor core melting. The core catcher concept incorporates a number of engineering solutions used in the catcher designs of European EPR and Russian WER-1000 reactors, such as thin-layer corium spreading for better cooling, retention of the melt in a water-cooled steel vessel, and use of sacrificial material (SM) to control the melt properties. SM is one of the key elements of the catcher design and its performance is critical for melt retention efficiency. This SM consists of oxide components, but the core catcher also includes sacrificial steel which reacts with the metal melt of the molten corium to reduce its temperature. The paper describes the required properties of SM. The melt retention capability of the core catcher can be confirmed by modeling the heat fluxes to the catcher vessel to show that it will not fail. The fulfillment of this requirement is demonstrated on the example of LBLOCA severe accident. Thermal and physicochemical interactions between the oxide and metal melts, interactions of the melts with SM, sacrificial steel and vessel, core catcher external cooling by water and release of non-condensable gases aremore » modeled. (authors)« less

Authors:
; ; ;  [1]; ; ;  [2];  [3];  [4]; ; ;  [5]
  1. Alexandrov Research Inst. of Technology NITI, Sosnovy Bor (Russian Federation)
  2. Saint Petersburg State Technological Univ. SPbSTU, St.Petersburg (Russian Federation)
  3. KTH, Stockholm (Sweden)
  4. KHNP, 1312 Gil 70, Yuseongdaero, Yuseong-gu, Daejeon (Korea, Republic of)
  5. KAERI, 989 Gil 111, Daedeokdaero, Yuseong-gu, Daejeon (Korea, Republic of)
Publication Date:
Research Org.:
American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
OSTI Identifier:
22107749
Resource Type:
Conference
Resource Relation:
Conference: ICAPP '12: 2012 International Congress on Advances in Nuclear Power Plants, Chicago, IL (United States), 24-28 Jun 2012; Other Information: Country of input: France; 33 refs.; Related Information: In: Proceedings of the 2012 International Congress on Advances in Nuclear Power Plants - ICAPP '12| 2799 p.
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; CONTAINERS; COOLING; CORE CATCHERS; CORIUM; DESIGN; ELECTRON SPIN RESONANCE; HEAT FLUX; MELTING; NUCLEAR POWER PLANTS; OXIDES; REACTOR ACCIDENTS; REACTOR CORES; SIMULATION; STEELS; THIN FILMS; WATER; WATER COOLED REACTORS; WWER TYPE REACTORS

Citation Formats

Granovsky, V. S., Sulatsky, A. A., Khabensky, V. B., Sulatskaya, M. B., Gusarov, V. V., Almyashev, V. I., Komlev, A. A., Bechta, S., Kim, Y. S., Park, R. J., Kim, H. Y., and Song, J. H. Modeling of melt retention in EU-APR1400 ex-vessel core catcher. United States: N. p., 2012. Web.
Granovsky, V. S., Sulatsky, A. A., Khabensky, V. B., Sulatskaya, M. B., Gusarov, V. V., Almyashev, V. I., Komlev, A. A., Bechta, S., Kim, Y. S., Park, R. J., Kim, H. Y., & Song, J. H. Modeling of melt retention in EU-APR1400 ex-vessel core catcher. United States.
Granovsky, V. S., Sulatsky, A. A., Khabensky, V. B., Sulatskaya, M. B., Gusarov, V. V., Almyashev, V. I., Komlev, A. A., Bechta, S., Kim, Y. S., Park, R. J., Kim, H. Y., and Song, J. H. 2012. "Modeling of melt retention in EU-APR1400 ex-vessel core catcher". United States.
@article{osti_22107749,
title = {Modeling of melt retention in EU-APR1400 ex-vessel core catcher},
author = {Granovsky, V. S. and Sulatsky, A. A. and Khabensky, V. B. and Sulatskaya, M. B. and Gusarov, V. V. and Almyashev, V. I. and Komlev, A. A. and Bechta, S. and Kim, Y. S. and Park, R. J. and Kim, H. Y. and Song, J. H.},
abstractNote = {A core catcher is adopted in the EU-APR1400 reactor design for management and mitigation of severe accidents with reactor core melting. The core catcher concept incorporates a number of engineering solutions used in the catcher designs of European EPR and Russian WER-1000 reactors, such as thin-layer corium spreading for better cooling, retention of the melt in a water-cooled steel vessel, and use of sacrificial material (SM) to control the melt properties. SM is one of the key elements of the catcher design and its performance is critical for melt retention efficiency. This SM consists of oxide components, but the core catcher also includes sacrificial steel which reacts with the metal melt of the molten corium to reduce its temperature. The paper describes the required properties of SM. The melt retention capability of the core catcher can be confirmed by modeling the heat fluxes to the catcher vessel to show that it will not fail. The fulfillment of this requirement is demonstrated on the example of LBLOCA severe accident. Thermal and physicochemical interactions between the oxide and metal melts, interactions of the melts with SM, sacrificial steel and vessel, core catcher external cooling by water and release of non-condensable gases are modeled. (authors)},
doi = {},
url = {https://www.osti.gov/biblio/22107749}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {7}
}

Conference:
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