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Considerations concerning the reliability of reactor safety equipment; Considerations sur la fiabilite des ensembles de securite de reacteurs

Abstract

A review is made of the circumstances which favor a good collection of maintenance data at the C.E.A. The large amount of data to be treated has made necessary the use of a computer for analyzing automatically the results collected. Here, only particular aspects of the reliability from the point of view of the electronics used for nuclear reactor control will be dealt with: sale and unsafe failures; probability of survival (in the case of reactor safety); availability. The general diagrams of the safety assemblies which have been drawn up for two types of reactor (power reactor and low power experimental reactor) are given. Results are presented of reliability analysis which could be applied to the use of functional modular elements, developed industrially in France. Improvement of this reliability appears to be fairly limited by an increase in the redundancy; on the other hand it is shown how it may be very markedly improved by the use of automatic tests with different frequencies for detecting unsafe failures rates of measurements for the sub-assemblies and for the logic sub-assemblies. Finally examples are given to show the incidence of the complexity and of the use of different technologies in reactor safety equipment  More>>
Authors:
Furet, J; Guyot, Ch [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1967
Product Type:
Technical Report
Report Number:
CEA-R-3292
Resource Relation:
Other Information: 7 refs
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; DATA ACQUISITION SYSTEMS; MAINTENANCE; MEASURING INSTRUMENTS; NUCLEAR INSTRUMENT MODULES; PROBABILISTIC ESTIMATION; REACTOR CONTROL SYSTEMS; RELIABILITY; SAFETY ANALYSIS
OSTI ID:
20726928
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR06R3292038373
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
[39] pages
Announcement Date:
May 24, 2006

Citation Formats

Furet, J, and Guyot, Ch. Considerations concerning the reliability of reactor safety equipment; Considerations sur la fiabilite des ensembles de securite de reacteurs. France: N. p., 1967. Web.
Furet, J, & Guyot, Ch. Considerations concerning the reliability of reactor safety equipment; Considerations sur la fiabilite des ensembles de securite de reacteurs. France.
Furet, J, and Guyot, Ch. 1967. "Considerations concerning the reliability of reactor safety equipment; Considerations sur la fiabilite des ensembles de securite de reacteurs." France.
@misc{etde_20726928,
title = {Considerations concerning the reliability of reactor safety equipment; Considerations sur la fiabilite des ensembles de securite de reacteurs}
author = {Furet, J, and Guyot, Ch}
abstractNote = {A review is made of the circumstances which favor a good collection of maintenance data at the C.E.A. The large amount of data to be treated has made necessary the use of a computer for analyzing automatically the results collected. Here, only particular aspects of the reliability from the point of view of the electronics used for nuclear reactor control will be dealt with: sale and unsafe failures; probability of survival (in the case of reactor safety); availability. The general diagrams of the safety assemblies which have been drawn up for two types of reactor (power reactor and low power experimental reactor) are given. Results are presented of reliability analysis which could be applied to the use of functional modular elements, developed industrially in France. Improvement of this reliability appears to be fairly limited by an increase in the redundancy; on the other hand it is shown how it may be very markedly improved by the use of automatic tests with different frequencies for detecting unsafe failures rates of measurements for the sub-assemblies and for the logic sub-assemblies. Finally examples are given to show the incidence of the complexity and of the use of different technologies in reactor safety equipment on the reliability. (authors) [French] On rappelle les circonstances qui favorisent au C.E.A. la collecte d'une information valable des resultats de la maintenance. L'importance des donnees a traiter a rendu necessaire l'utilisation d'une calculatrice poux l'analyse automatique des resultats recueillis. On se limitera ici aux aspects particuliers de la fiabilite du point de vue de l'electronique pour le controle et la commande de reacteurs nucleaires: pannes sures et pannes non sures; probabilite de survie dans le cas de la securite des reacteurs; facteur de disponibilite. Les schemas de principe des ensembles de securite definis pour deux types de reacteurs (reacteur de puissance et reacteur experimental de faible puissance) sont indiques. On donne les resultats d'une analyse de fiabilite previsionnelle lorsque l'on utilise les elements fonctionnels en boitiers modulaires developpes industriellement en France. L'amelioration de cette fiabilite semble assez limitee par une augmentation de la redondance, par contre, on montre comment elle peut etre tres nettement amelioree par l'emploi de systemes de recherche automatique de pannes a des frequences tres differentes pour les sous-ensembles de mesure et les sous-ensembles logiques. Enfin, on montre sur des exemples l'incidence sur la fiabilite de la complexite et de l'emploi de technologies differentes dans les ensembles de securite de reacteurs. (auteurs)}
place = {France}
year = {1967}
month = {Jul}
}