An Experimental Study on Coolability of Volumetrically Heated Particulate Beds of Prototypical Characteristics
This paper is concerned with debris bed coolability in a hypothetical severe accident of light water reactors (LWRs), when the molten corium is relocated into a water pool, fragmenting and forming a particulate debris bed on the water pool bottom. A test facility named POMECO-FL is designed and set up to obtain the effective particle diameter of a particle bed which has some selected characteristics of the prototypical debris bed, such as packed with particles of multiple sizes and irregular shapes. Another test facility POMECO-HT is designed and constructed to investigate the coolability of the bed. The facility features flexibility of reconfiguration and a maximum heat flux of 2.1 MW/m2 at the bed’s top surface, which enables coolability investigation on various beds of a broad range of particulate beds with both top-flooding and bottom-fed schemes. The designs of the facilities and their capabilities are presented here. The preliminary results show that given the effective particle diameter obtained from single-phase flow through a packed bed with multi-size irregular particles, both the pressure drop and the dryout heat flux of two-phase flow through the bed can be predicted by the Reed’s model. After the commissioning work, the two facilities are ready for a comprehensive experiment campaign to obtain insights interpreting the safety margins of prototypical debris beds, as well as to provide high-quality data for the validation of coolability analysis models and codes.
Severe accident debris bed two-phase flow dryout heat flux coolability
Weimin Ma Liangxing Li Aram Karbojian
Division of Nuclear Power Safety, Royal Institute of Technology (KTH) Roslagstullsbacken 21, 106 91 Stockholm, Sweden
国际会议
上海
英文
1552-1563
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）