The Proceedings of the International Conference on Nuclear Engineering (ICONE)
Online ISSN : 2424-2934
2011.19
Session ID : ICONE19-43296
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ICONE19-43296 The ASME pressurization transient analyses for Lungmen ABWR
Chiung-Wen TsaiChunkuan ShihJong-Rong WangHao-Tzu LinSu-Chin ChengFong-Lun Lin
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
The ASME pressurization transient analyses are performed by the TPC/INER Transient Analysis Methodology (TITRAM). Three typical ASME pressurization transients including main steam isolation valves closure (MSIVC), load rejection (LR), and turbine trip (TT) are analyzed to evaluate the maximum vessel pressure. The conservative assumptions including failure of direct scram signals, relief valve function, and 7 of 18 safety valves, and larger initial core power and pressure are utilized for conservatism. The analysis results indicate that MSIVC event leads to largest maximum vessel pressure of 9.17 MPaG, which is below the acceptance criterion of 9.48 MPaG. The sensitivity analysis is conducted to identify the sensitive parameters associated with ASME pressurization by MSIVC. The sensitivity analysis results indicate that SV setpoint is the most sensitive parameters among the input parameters for ASME pressurization with MSIVC. It is concluded that the performance of SVs is capable of preventing the vessel pressure from reaching safety limit (9.48MPaG).
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© 2011 The Japan Society of Mechanical Engineers
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