Comparison of the observed Fukushima Dai-ichi Unit 2 debris with simulated debris from the CLADS-MADE-01 control blade degradation test

Pshenichnikov, A. ; 永江 勇二 ; 倉田 正輝 

Pshenichnikov, A.; Nagae, Yuji; Kurata, Masaki

The paper describes the attempt of comparison of the simulated test CLADS-MADE-01 debris with the observed in the Unit 2. Similarities between them allowed to make conclusions on their possible source. During the test under postulated 1F Unit 2 simulated conditions a complex behaviour of the test sample with formation of mostly three types of debris was observed. A possible mechanism of stone-like debris formation in 1F case is discussed. The results of this paper broaden our understanding of the metallic debris properties after core degradation for a special case of steam-starved conditions at 1F Unit 2.