Analysis of the damage domains of sbo sequences with rcp passive thermal shutdown

Queral Salazar, José Cesar and Mena-Rosell, L. and Jiménez Varas, Gonzalo and Sánchez-Perea, M. and Hortal, J. and Gómez-Magán, J. (2014). Analysis of the damage domains of sbo sequences with rcp passive thermal shutdown. In: "ICONE22.Proceedings of the 22th International Conference on Nuclear Engineering", 7-11 Julio 2014, Praga. pp. 1-8.

Description

Title: Analysis of the damage domains of sbo sequences with rcp passive thermal shutdown
Author/s:
  • Queral Salazar, José Cesar
  • Mena-Rosell, L.
  • Jiménez Varas, Gonzalo
  • Sánchez-Perea, M.
  • Hortal, J.
  • Gómez-Magán, J.
Item Type: Presentation at Congress or Conference (Article)
Event Title: ICONE22.Proceedings of the 22th International Conference on Nuclear Engineering
Event Dates: 7-11 Julio 2014
Event Location: Praga
Title of Book: ICONE 22.Proceedings of the 22th International Conference on Nuclear Engineering
Date: 2014
Subjects:
Faculty: E.T.S.I. de Minas y Energía (UPM)
Department: Energía y Combustibles
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The integrated Safety Assessment (ISA) methodology, developed by the Spanish Nuclear Safety Council (CSN), has been applied to a thermal-hydraulic analysis of PWR Station Blackout (SBO) sequences in the context of the IDPSA (Integrated Deterministic-Probabilistic Safety Assessment) network objectives. The ISA methodology allows obtaining the damage domain (the region of the uncertain parameters space where the damage limit is exceeded) for each sequence of interest as a function of the operator actuations times. Given a particular safety limit or damage limit, several data of every sequence are necessary in order to obtain the exceedance frequency of that limit. In this application these data are obtained from the results of the simulations performed with MAAP code transients inside each damage domain and the time-density probability distributions of the manual actions. Damage limits that have been taken into account within this analysis are: local cladding damage (PCT>1477 K); local fuel melting (T>2499 K); fuel relocation in lower plenum and vessel failure. Therefore, to every one of these damage variables corresponds a different damage domain. The operation of the new passive thermal shutdown seals developed by several companies since Fukushima accident is considered in the paper. The results show the capability and necessity of the ISA methodology, or similar, in order to obtain accurate results that take into account time uncertainties.

More information

Item ID: 36321
DC Identifier: http://oa.upm.es/36321/
OAI Identifier: oai:oa.upm.es:36321
Official URL: http://www.asmeconferences.org/icone22/
Deposited by: Memoria Investigacion
Deposited on: 02 Jul 2015 08:42
Last Modified: 01 Mar 2017 16:40
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