The RMPS (Reliability Methods for Passive Systems) is a research programme sponsored by EU within the 5th European Framework Programme. Main goal of the activity, begun in the first half of 2001, is the identification of a suitable methodology capable to evaluate both qualitatively and quantitatively the reliability of passive systems. The research development foresees the application of such a methodology to study cases, e.g. passive systems of industrial interest. The working team is leaded by CEA and groups research centres (GRS, JRC, ENEA), universities (CIRTEN consortium) and industries (Technicatome). The approach moves from a previous study performed by ENEA and some CIRTEN partners. The strategy is based on the identification of all possible ways of departure of the system from the nominal behaviour, defined at the design stage. The passive system can fail its mission not only due to classical mechanical failures, but also because of physical failures, usually related to thermalhydraulic features. Moreover, the failure state of the passive system has to be defined, e.g. connected to physical parameters as natural circulation flow rate or heat transfer rate. The paper reports a preliminary roadmap proposed for the development of the RMPS method, with a brief description for each step. Then a sensitivity analysis on the results of the previous study has been performed, showing the most important parameters affecting the behavior of the passive safety system selected as a case study. The analysis revealed also a singular occurrence in the calculations and some considerations have been drew. Finally, a useful basis for a thorough Expert Judgement process, to be carried out on the identification of the characteristic parameters for the passive safety system, has been set up. Justifications for the selection of the main parameters affecting the system behavior, hence its reliability, for their ranges of variation and their probability of occurrence have been identified.
Reliability methods for passive system (RMPS) study – strategy and results / Ricotti, M. E.; Zio, E.; D'Auria, F.; Caruso, Gianfranco. - STAMPA. - (2002), pp. 149-166. (Intervento presentato al convegno NEA CSNI WGRISK Workshop on ‘Passive system Reliability tenutosi a Cadarache (Francia) nel 04-06/03/2002).
Reliability methods for passive system (RMPS) study – strategy and results
CARUSO, Gianfranco
2002
Abstract
The RMPS (Reliability Methods for Passive Systems) is a research programme sponsored by EU within the 5th European Framework Programme. Main goal of the activity, begun in the first half of 2001, is the identification of a suitable methodology capable to evaluate both qualitatively and quantitatively the reliability of passive systems. The research development foresees the application of such a methodology to study cases, e.g. passive systems of industrial interest. The working team is leaded by CEA and groups research centres (GRS, JRC, ENEA), universities (CIRTEN consortium) and industries (Technicatome). The approach moves from a previous study performed by ENEA and some CIRTEN partners. The strategy is based on the identification of all possible ways of departure of the system from the nominal behaviour, defined at the design stage. The passive system can fail its mission not only due to classical mechanical failures, but also because of physical failures, usually related to thermalhydraulic features. Moreover, the failure state of the passive system has to be defined, e.g. connected to physical parameters as natural circulation flow rate or heat transfer rate. The paper reports a preliminary roadmap proposed for the development of the RMPS method, with a brief description for each step. Then a sensitivity analysis on the results of the previous study has been performed, showing the most important parameters affecting the behavior of the passive safety system selected as a case study. The analysis revealed also a singular occurrence in the calculations and some considerations have been drew. Finally, a useful basis for a thorough Expert Judgement process, to be carried out on the identification of the characteristic parameters for the passive safety system, has been set up. Justifications for the selection of the main parameters affecting the system behavior, hence its reliability, for their ranges of variation and their probability of occurrence have been identified.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
