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.

Programme(s)

• FP5-EAECTP C - Research and training programme (Euratom) in the field of nuclear energy (1998 to 2002)

Topic(s)

• 2.1.2.-1.3.1 - Evolutionary safety concepts

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