Analysis of Fukushima unit 2 accident considering the operating conditions of RCIC system
| Autor: | Kwang Soon Ha, Song-Won Cho, Sung Il Kim, JinHo Song, Jong Hwa Park |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Nuclear and High Energy Physics
Engineering Nuclear fission product Waste management business.industry 020209 energy Mechanical Engineering Nuclear engineering System safety 02 engineering and technology Accident analysis 01 natural sciences 010305 fluids & plasmas Nuclear Energy and Engineering Nuclear reactor core MELCOR 0103 physical sciences 0202 electrical engineering electronic engineering information engineering General Materials Science Electricity Decay heat Safety Risk Reliability and Quality business Waste Management and Disposal |
| Zdroj: | Nuclear Engineering and Design. 298:183-191 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2015.12.024 |
| Popis: | A severe accident in Fukushima occurred on March 11, 2011 and units 1, 2 and 3 were damaged severely. A tsunami following an earthquake made the supply of electricity power stop, and the safety systems, which use AC or DC power in plants could not operate properly. It is supposed that the degree of core degradation of unit 2 is less serious than in the other plants, and it was estimated that the operation of reactor core isolation cooling (RCIC) system at the initial stage of the accident minimized the core damage through decay heat removal. Although the operating conditions of the RCIC system are not known clearly, it can be important to analyze the accident scenario of unit 2. In this study, best case of the Fukushima unit 2 accident was presented considering the operating conditions of the RCIC system. The effects of operating condition on core degradation and fission product release rate to environment were also examined. In addition, importance of torus room flooding level in the accident analysis was discussed. MELCOR 1.8.6 was used in this research, and the geometries of plant and operating conditions of safety system were obtained from TEPCO through OECD/NEA BSAF Project. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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