非常用復水器を用いた過酷事故防止策に関する研究

英字タイトル:
Study of Easing Severe Accident by Using Isolation Condenser
著者:
下江知弘 Tomohiro SHIMOE 奈良林直 Tadashi NARABAYASHI 辻雅司 Masashi TUJI 千葉豪 Go CHIBA
発刊日: 2013年7月24日
公開日: 2019年6月28日

カテゴリ: 第10回

キーワードタグ:
Core CoolingFukushima Daiichi Nuclear Plant Unit 1Isolation CondenserTRAC code

概要

In this study, we aimed to quantitatively evaluate cooling capacity of isolation condenser (IC) for core cooling in Fukushima Daiichi Nuclear Plant Unit 1. In order to evaluate cooling capacity, we calculated decay heat which was emitted from core. We used the data of nuclear fuel and rated thermal power which is released by TEPCO. Analysis was conducted with TRAC code. We made an experiment in order to check input data for IC. Because analysis data was close to experimental data, we made sure of validity of input data. We analyzed IC under conditions which were recorded when IC started up and tsunami rushed toward plant. As a result of analysis, we confirmed that cooling capacity exceed decay heat under both conditions. In conclusion, IC had a capacity to prevent core meltdown accident in Fukushima Daiichi Nuclear Plant Unit 1.