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《Nuclear Science and Engineering》 2012-01
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FMECA about pre-treatment system for purge gas of test blanket module in ITER

FU Wan-fa,LUO De-li,TANG Tao(National Surface Physics and Chemistry Laboratory,Mianyang of Sichuan Prov.621907,China)  
The pre-treatment system for purge gas of TBM will be installed in Port Cell for installing TBM in ITER,the function of which includes filtering purge gas,removing HTO,cooling,and adjusting flow rate,etc.The purge gas treated will be conveyed into TES(Tritium Extraction System).The technological process and system components in pre-treatment system were introduced.Tritium releasing risk was regarded as failure criterion;failure mode,effects and criticality analysis(FMECA) were carried out and several weaknesses or failure mode in the system were found.Besides,risk priority number(RPN) and failure mode criticality were calculated.Finally,some design improvement measures and usage compensation measures were given.At last,four important potential failure modes were found out.The analysis will provide the design basis for reducing risk of excessive tritium releasing,which is also a useful assist for safety analysis about other tritium system.
【Fund】: 国家磁约束核聚变能研究专项(2010GB112001)
【CateGory Index】: TL67
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