ABSTRACT

In February 2019, TEPCO and TOSHIBA designed a robot that can handle the debris, performed a trial investigation of primary containment vessel (PCV) of the Fukushima Dai-Ichi (1F) Unit 2 and published a video. The video contained lots of valuable information which can be compared with results of BWR control blade degradation tests recently performed in Japan Atomic Energy Agency (JAEA). During the test under postulated 1F Unit 2 simulated conditions a complex behaviour of the test sample with the formation of mostly three types of debris was observed. Possible mechanisms governing the 1F Unit 2 debris formation and possible ways of their relocation are discussed.

摘要

2019年2月，东京电力公司和东芝公司设计了一种可以处理碎片的机器人，对福岛第一核电站（1F）2号机组的初级安全壳（PCV）进行了试验研究，并发布了视频。该视频包含许多有价值的信息，可以与日本原子能机构（JAEA）最近进行的BWR控制叶片退化测试的结果进行比较。在假定的1F 2号单元模拟条件下进行测试期间，观察到测试样品的行为复杂，主要形成三种类型的碎屑。讨论了控制1F 2号机碎片形成的可能机制及其迁移方式。