Exploration of reliability databases and comparison of former IFMIF's results

RAMI analyses of the IFMIF accelerator facility and first availability allocation between systems

“…The data used to develop these calculations come from previous reliability data research done in the Fusion Energy Engineering Laboratory [9] and from specific accelerator reliability documents [5,[10][11][12].…”

IFMIF accelerator: Database, FMEA, fault tree and RAM

“…The elaboration of an independent reliability database was the first issue in the RAM analysis [6]. There is not a wide range of reliability data on this technology available.…”

“…The failure rates have been modeled into lognormal distributions. The data used together with their sources are described in a paper with the same title as [6] published in the present journal.…”

“…The most critical basic events (component/system failure that end in beam loss) are the failures of heat exchanger of the RFQ, the vacuum pumping system of the same part, and the diagnostics of both, the HEBT and the LEBT. There are high error factors in the heat exchangers and in the electric connections due to the high variability in the data of the operational failure rates found in [6].…”

“…Since there is a low uncertainty about their failure rates (see paper [6] published in the present journal), the two sensitive values under consideration are their repair times.…”