- 著者
- 玉井 秀定 秋本 肇 高瀬 和之
- 出版者
- Atomic Energy Society of Japan
- 雑誌
- 日本原子力学会和文論文誌 (ISSN:13472879)
- 巻号頁・発行日
- vol.11, no.1, pp.8-12, 2012 (Released:2012-02-15)
- 参考文献数
- 5
- 被引用文献数
- 1 1
The Fukushima Daiichi Nuclear Plant Unit 1 accident was investigated with the TRAC-BF1 code in order to confirm the effect of an isolation condenser (IC) on core cooling analytically. The analysis shows that the formation of two-phase natural-circulation flow is a key phenomenon for core cooling. Therefore, it is too late to cool fuel rods, once the core is heated up because of the lack of coolant. It also shows that the early start-up of the IC is essential for avoiding the core meltdown under station blackout conditions.
- 著者
- 玉井 秀定 秋本 肇 高瀬 和之
- 出版者
- Atomic Energy Society of Japan
- 雑誌
- 日本原子力学会和文論文誌 (ISSN:13472879)
- 巻号頁・発行日
- pp.1201280043, (Released:2012-01-31)
- 参考文献数
- 5
- 被引用文献数
- 1 1
The Fukushima Daiichi Nuclear Plant Unit 1 accident was investigated with the TRAC-BF1 code in order to confirm the effect of an isolation condenser (IC) on core cooling analytically. The analysis shows that the formation of two-phase natural-circulation flow is a key phenomenon for core cooling. Therefore, it is too late to cool fuel rods, once the core is heated up because of the lack of coolant. It also shows that the early start-up of the IC is essential for avoiding the core meltdown under station blackout conditions.
- 著者
- 永武 拓 玉井 秀定 秋本 肇 吉田 啓之 高瀬 和之
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 計算力学講演会講演論文集 (ISSN:1348026X)
- 巻号頁・発行日
- vol.2012, no.25, pp.718-719, 2012-10-06
The Fukushima Daiichi Nuclear Plant, Unit No.1, 2 and 3 which were under operation were automatically shut down when the earthquake occurred. After the earthquake, the tsunami reached the planst and all AC power was lost. This loss of AC power made it impossible to supply cooling water into the pressure vessel. After that, the water level in the pressure vessel became less and the meltdown occurred. But the loss of coolant and core uncovery process is unclear, because the plant parameters (water level, pressure, etc) could not be checked in the situation of loss of electric power. Now we are performing the numerical evaluation regarding to the core uncovery process in the Fukushima Daiichi Nuclear Plant Unit No.1 accident with the TRAC-BF1 code. In this study, the core uncovery process and the effect of isolation condenser for the reactor core cooling were investigated. This paper describes the results of the numerical evaluation on the core uncovery process.