Kaynar Su Reaktörü Kullanılmış Yakıt Depolama Havuzunda Akış Kaybı Kazası Analizi

Abstract

In March 2011, Japan was faced with the greatest natural disaster of its history. According to the Richter scale, the great earthquake magnitude of 8.9 was followed by a devastating tsunami, reaching 10-15 meters. After the earth quake and tsunami disaster in Japan, major accident (INES-7 level 7) had happened in Fukushima Daiichi Nuclear Power Plant. When the earthquake and tsunami occurred, Fukushima Unit 4 was in its periodic shut-down stage, and all fuel bundles in the core had been moved to the spent fuel pool. Approximately four days after the station black out, there was an explosion observed at Unit 4, then all focused on the spent fuel storage pool. This study focus on the loss of coolant flow accident in spent fuel storage pool which is modeled by using RELAP5/SCDAP code, designed to analyze the behavior of reactor systems under normal operating conditions or in the event of an accident to observe the coolant level reduction and fuel uncovery because of decay heat of the fuel in the pool.