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首页> 外文期刊>Annals of nuclear energy >Detailed evaluation of natural circulation mass flow rate in the annular gap between the outer reactor vessel wall and insulation under IVR-ERVC
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Detailed evaluation of natural circulation mass flow rate in the annular gap between the outer reactor vessel wall and insulation under IVR-ERVC

机译：在IVR-ERVC下详细评估反应堆外壁和隔热层之间的环形间隙中的自然循环质量流量

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摘要

IVR (In-Vessel corium Retention) through ERVC (External Reactor Vessel Cooling) is known to be an effective means for maintaining the reactor vessel integrity during a severe accident in a nuclear power plant. Detailed simulations of a two phase natural circulation flow in the reactor cavity of an APR (Advanced Power Reactor) 1400 and advanced OPR (Optimized Power Reactor) 1000 under the IVR-ERVC have been conducted to determine the coolant circulation mass flow rate at the annular gap between the outer reactor vessel wall and the insulation of the reactor vessel using the RELAP5/MOD3 computer code. This coolant mass flow rate is very effective on the CHF (Critical Heat Flux) on the outer reactor vessel wall, which is a key factor to the success of the IVR-ERVC. The RELAP5 results have shown that the coolant circulation mass flow rate of a high power reactor of the APR1400 is higher than that of a low power reactor of the advanced OPR1000. Increases in the coolant injection temperature and the water level in the reactor cavity lead to an increase in the coolant circulation mass flow rate, which leads to an increase in the CHF on the outer reactor vessel wall. (C) 2015 Elsevier Ltd. All rights reserved.
机译：众所周知，通过ERVC（外部反应堆容器冷却）的IVR（容器内钙保留）是在核电站发生严重事故期间维持反应堆容器完整性的有效手段。在IVR-ERVC下，对APR（先进动力堆）1400和先进OPR（优化动力堆）1000的反应堆腔体中的两相自然循环流进行了详细的模拟，以确定环形的冷却剂循环质量流量使用RELAP5 / MOD3计算机代码在反应堆外容器壁与反应堆保温层之间形成间隙。该冷却剂质量流量对反应堆外壁的CHF（临界热通量）非常有效，这是IVR-ERVC成功的关键因素。 RELAP5结果表明，APR1400的高功率反应堆的冷却剂循环质量流量高于先进的OPR1000的低功率反应堆的冷却剂循环质量流量。冷却剂注入温度和反应堆腔中水位的增加导致冷却剂循环质量流量的增加，这导致反应堆外部容器壁上的CHF升高。 （C）2015 Elsevier Ltd.保留所有权利。

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