Research on Containment Pressure Suppression and Heat Transfer of Small PWR
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摘要: 小型压水堆(PWR)采用抑压水箱和浸没式钢制安全壳的设计,冷却剂失水事故(LOCA)后短期内利用抑压水箱抑制安全壳压力上升,长期利用钢安全壳与外部水池的传热带出热量。其抑压和传热特性与传统干式安全壳存在本质区别。本文分别对抑压水箱的抑压特性和钢制安全壳壁换热特性进行了对比研究,并针对PWR安全壳抑压水箱容量和安全壳换热面积进行了需求分析。分析结果表明,抑压水箱能有效地抑制安全壳短期升压,钢安全壳换热面积增大到350 m2时,即可满足长期供热要求。Abstract: Small PWR has adopted the suppression tank and the steel containment with outside pool to mitigate the containment pressure and temperature increasing after a relevant accident. The features of suppression and heat transfer are essentially different from those of a conventional PWR.This paper studied the features of the pressure suppression through the suppression tank and the heat transfer through the steel containment, respectively. After that, the requirement of the suppression tank and the heat transfer area was studied. Analysis results demonstrated that the pressure increasing can be suppressed effectively by the suppression tank, while the requirement of the heat removal can be fully satisfied if the heat transfer area increases to 350 m2.
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Key words:
- Small PWR /
- Pressure suppression and heat transfer /
- Steel containment
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