Key Components of the Jet Active Gas Handling System – Experimental Programme and Test Results

Hemmerich, J.L.; Dombra, A.H.; Gowman, J.; Groskopfs, E.; Haange, R.; Konstantellos, A.; Küssel, E.; Lässer, R.; Milverton, P.; Walker, Ken; Walter, K.; Komarek, P.

doi:10.1016/b978-0-444-87369-9.50013-5

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Fmea Failure Rate Data1

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“…Given this information, there is no radiation damage k factor estimated for the valve seal. It is noted that vespel has been used as a valve seat seal in gas systems at the Joint European Torus with success; the researchers there tested vespel valve stem tips for stainless steel gas valves to 50,000 openclose cycles of the valves and there was no detectable gas leak across the valve seat (Hemmerich, 1989); the vespel seal valves also gave good service over several years (Hemmerich, 1992). Using the reported test data to apply to the DM valve, an estimate of 200 demands/3,000 hours is used.…”

Section: Fmea Failure Rate Datamentioning

confidence: 99%

Preliminary Failure Modes and Effects Analysis of the US Massive Gas Injection Disruption Mitigation System Design

Cadwallader

2013

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This report presents the results of a preliminary failure modes and effects analysis (FMEA) of a candidate design for the ITER Disruption Mitigation System. This candidate is the Massive Gas Injection System that provides machine protection in a plasma disruption event. The FMEA was quantified with "generic" component failure rate data as well as some data calculated from operating facilities, and the failure events were ranked for their criticality to system operation. v CONTENTS ABSTRACT

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Section: Fmea Failure Rate Datamentioning

confidence: 99%