MOST IMPORTANT ACTIONS OF NUCLEAR POWER PLANT AT EARTHQUAKE ARE STOPPING COOLING CONFINING RADIOACTIVE MATERIALS
On July 16th2007, Niigataken Chuetsu Oki earthquake with M6.8, h=17km, hit directly Kashiwazaki Kariwa nuclear power plant (8.2GW) of Tokyo Electric Power Co.. A transformer outside of a plant building had a fire due to the leakage of insulation oil caused by the ground subsidence. The water containing extremely little radioactive material overflowed the storage pool for the used nuclear fuel by the sloshing and it went out to the sea. These are not serious accidents as a result. In spite of these accidents, the nuclear power plant succeeded to do Emergency stop, Cooling from 280℃ to 100℃, and Confining in the radioactive materials. Although the nuclear power plant was hit by the strong earthquake ground motion the maximum acceleration of which amounts to 680gals on the underground bedrock, three actions, Stop, Cooling, and Confining were successfully carried out. The reason of success might be that the most important facilities have the earthquake resistance 3 times of the general RC buildings in Japan and sufficient ductility.
Nuclear power plant earthquake earthquake resistant design safety allowance
Motohiko Hakuno
Professor, Kogyokusha College of Technology Tokyo ,Japan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）