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Reliability methods for passive safety functions

Objective

The functions of the passive B systems are based on thermal-hydraulic (T-H) principles, which are not currently considered to be subject to any kind of failure. But due to the environment and to the physical phenomena that may deviate from expectation, the passive system may fail to meet its required passive function. The quantification of the T-H unreliability is often still a difficult process due to the numerous uncertainties.

The methodology that we propose to develop will bring answers to the following problems:
- Identification and quantification of the sources of uncertainties and determination of the important vanables,
- Propagation of the uncertainties through a T-H model and reliability assessment of the T-H passive system,
- Introduction of passive system unreliability in the accident sequence analysis.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

COMMISSARIAT A L'ENERGIE ATOMIQUE
Address
Cea Cadarache, Bat. 238
13108 St.paul Les Durance
France

Participants (6)

COMMISSION OF THE EUROPEAN COMMUNITIES
Netherlands
Address
Westerduinweg 3
1755 ZG Petten
CONSORZIO INTERUNIVERSITARIO PER LA RICERCA TECNOLOGICA NUCLEARE
Italy
Address
Via Flavia 104
Roma
GESELLSCHAFT FUER ANLAGEN- UND REAKTORSICHERHEIT (GRS) MBH
Germany
Address
Forschungsgelaende
85739 Garching
ITALIAN AGENCY FOR NEW TECHNOLOGY, ENERGY AND THE ENVIRONMENT
Italy
Address
Via Martiri Di Monte Sole 4
40129 Bologna
TECHNICAL UNIVERSITY OF SOFIA
Bulgaria
Address
8, Kl. Ohridski Blvd. Block 12, Office 12440
1797 Sofia
TECHNICATOME SA
France
Address
Avenue Jean-rené Guillibert Gautier De La Lauziere
13791 Aix En Provence