Behaviour of electrical cables under fire conditions
-
R. Bertrand
Abstract
A Fire Probabilistic Safety Assessment – called the Fire PSA – is being carried out by the French Institute of Radiological Protection and Nuclear Safety (IRSN) to be used in the framework of the safety assessment of operating 900 MWe PWRs. The aim of this study is to evaluate the core damage conditional probability which could result from a fire. A fire can induce unavailability of safety equipment, notably damaging electrical cables introducing a significant risk contributor. The purpose of this paper is to present the electrical cable fire tests carried out by IRSN to identify the failure modes and to determine the cable damage criteria. The impact of each kind of cable failure mode and the methodology used to estimate the conditional probability of a failure mode when cable damage occurred is also discussed.
Abstract
Eine probabilistische Sicherheitsanalyse zum Brand, kurz Brand-PSA, ist beim französischen Institut IRSN im Rahmen der Sicherheitsbeurteilung der in Betrieb befindlichen 900 Mwe Druckwasserreaktoren durchgeführt worden. Ziel dieser Studie ist die Ermittlung der bedingten Wahrscheinlichkeit für einen Kernschaden aufgrund eines Brandes. Ein Brand kann zur Unverfügbarkeit der Sicherheitssysteme führen, z. B. durch beträchtliche Beschädigung elektrischer Kabel, und dadurch einen signifikanten Risikobeitrag liefern. Ziel dieses Beitrags ist eine Beschreibung der elektrischen Kabelbrandversuche, die bei IRSN durchgeführt wurden, um Fehlerraten zu identifizieren und Kriterien für Kabelschäden festzulegen. Der Einfluss der verschiedenen Fehlerraten bei Kabeln und die verwendete Methode zur Berechnung der bedingten Wahrscheinlichkeit für einen Kabelschaden bezogen auf die jeweilige Fehlerart wird ebenfalls dargestellt.
References
1 Bertrand, R.; Bonneval, F.; Lamuth, P.: Estimation of Fire Frequency from PWR Operating Experience; PSA 95, 1995Search in Google Scholar
2 Bertrand, R.; Bonneval, F.: A computerized Fire PSA; PSA 96 (1996)Search in Google Scholar
3 Bertrand, R.; Bonneval, F.; Roy, F.; Casselman, C.; Such, J. M.: Studies of Fire Development; Development of FLAMME-S Computer Code. ICONE 5; May 25–29, 1997, Nice, FranceSearch in Google Scholar
4 Bertrand, R.; Bonneval, F.; Mattei, J. M.: Fire Probability Safety Analysis in France for 900 MWe NPP. Kerntechnik 65 (2000) 11110.1515/kern-2000-652-316Search in Google Scholar
© 2002 Carl Hanser Verlag, München
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Articles in the same Issue
- Frontmatter
- Calendar of Events
- Calendar of events . Veranstaltungskalender
- Summaries
- Summaries
- Books
- Safety Assessment and Verification for Nuclear Power Plants
- 3D numerical investigation of natural circulation between the reactor pressure vessel and the cooling pond of a VVER-440 type reactor in incidental conditions during maintenance
- A process-oriented simulation model for common cause failures
- Books
- Books · Bücher
- Simulation of pulsed neutron activation for determination of water flow in pipes
- Books
- Books · Bücher
- Adjoint P1 equations for neutron slowing down
- Books
- Bücher · Books
- Experimental and numerical investigation of sub-cooled boiling, condensation, and void flashing in nuclear heating reactor test loop
- Analytical study of flow instability behaviour in a boiling two-phase natural circulation loop under low quality conditions
- Books
- Bücher · Books
- Thermal hydraulic analysis and design of the WWR-M2 nuclear research reactor – power upgrading
- Books
- Books · Bücher
- Simulation of the gamma dose rate in a loss of pool water accident of the second Egyptian research reactor ET-RR-2
- Behaviour of electrical cables under fire conditions
- Books
- Better integration of radiation protection in modern society.
- Berechnungsverfahren für Temperaturen im Brandnahbereich
- Books
- Modifications to Nuclear Power Plants
- Alerting procedures for scenarios without warning times
- Technical Note
- Approximation of solitary burn-up waves by generalized Gompertz functions
- Advances · Patente
- Patent
- Note · Mitteilung
- Notes
