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- NARABAYASHI Tadashi
- Hokkaido University
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- CHIBA Go
- Hokkaido University
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- KAWAMURA Shinichi
- TEPCO
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- MAKI Hideo
- Hitachi Ltd.
Bibliographic Information
- Other Title
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- 福島第一原子力発電所事故の考証
- (3)サポート系の機能喪失によるベント失敗
- (3)Vent failure by loss of support system function
Abstract
<p>Many lessons can be learned from the Fukushima Daiichi Nuclear Power Plant (NPP) accident. After the loss of Emergency Core Cooling System (ECCS) and IC core cooling, fuels in the core melted down. Leak of fission product and hydrogen began because of high-temperature damage to the PCV packing. A hydrogen explosion occurred in the upper floor in the reactor building in Units 1, 3 and 4. At Unit 2, reactor core isolation cooling (RCIC) continued to function for about 3 days. Soon after the loss of RCIC water injection, the water level in the RPV declined. Drywell pressure increased from 400 kPa to 750 kPa, and PCV top flange might leak began through silicon rubber O-ring. It was an initiation of severe contamination around the NPS. In the afternoon on March 15, wind blew toward Iidate village. Melted core relocation into lower plenum caused the radiation level increased. The radiation level was measured by containment atmospheric monitoring system (CAMS).</p>
Journal
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- The Proceedings of the National Symposium on Power and Energy Systems
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The Proceedings of the National Symposium on Power and Energy Systems 2016.21 (0), B133-, 2016
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390282680861702784
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- NII Article ID
- 130007142856
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- ISSN
- 24242950
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed