フィルタベント装置の実機高さ条件での性能評価試験

(2) 水溶性粒子の除染係数の計測

抄録

After the Fukushima Daiichi nuclear disaster, TEPCO launched a project to develop the Filtered Containment Venting System (FCVS), in which our very bitter experiences in the accident are reflected. One of the main purposes of the development of the FCVS is to enhance operability of venting under the severe plant conditions such as the SBO during progressing of severe core damage, and another is to enhance removal performance of radio-nuclides with the newly added filtering equipment, which is installed in the venting line from the PCV to the outer. The Kashiwazaki-Kariwa NPS unit 6 and 7 are the first reactors applied the FCVSs. Performance of the FCVS has been verified by an extensive test program includes scaled filter venting test under various conditions. In this paper, we show some test results on water-soluble aerosol decontamination factor (DF) under steam condition.