MOPOL Development and Uncertainties Analysis in IVR Assessment

Abstract

Abstract: A program named MOPOL based on lumped parameter model was developed to assess IVR (invessel core debris retention) effectiveness according to the IVR assessment method——ROAAM (risk oriented accident analysis methodology), then the program was validated. Regarding the key parameters in IVR assessment such as break size, average effective time of irradiation and structure mass in the vessel, uncertainty analysis was made to evaluate the effects of these parameters to IVR effectiveness. The analysis results indicate that in the case of larger break accident and longer irradiation time, safety margins of the pressure vessel wall to thermal failure are smaller; in addition, properly increase structures mass in the pressure vessel can enhance IVR effectiveness.

Key words: in-vessel core debris retention (IVR), accident mitigation, 2-layer lumped parameter model, uncertainty

CLC Number:

TL 364

YANG Xiao, YANG Yan-Hua. MOPOL Development and Uncertainties Analysis in IVR Assessment[J]. Journal of Shanghai Jiaotong University, 2012, 46(09): 1498-1502.

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MOPOL Development and Uncertainties Analysis in IVR Assessment

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