[1A15-20] 1F fuel debris 2

4:20 PM - 4:35 PM JST(7:20 AM - 7:35 AM UTC)

[1A15] Analysis of fuel debris obtained from inside the pedestal of Unit 2 of Fukushima Daiichi Nuclear Power Station(15) Estimation of formation process of fuel debris based on the results of sample analysis

*Hirotomo Ikeuchi¹, Hideki Ogino¹, Masato Mizokami², Shinya Mizokami² (1. JAEA, 2. TEPCO HD)

Keywords:

Fukushima Daiichi Nuclear Power Station accident,Fuel debris,Solid analysis,Solution analysis

Fuel debris samples were retrieved from Unit 2 of the Fukushima Daiichi Nuclear Power Station through two trial retrieval campaigns (the first in November 2024 and the second in April 2025). Those samples were subjected to a variety of analyses at JAEA facilities. The primary objective is to improve the understanding of accident progression and thereby to clarify conditions inside the PCV and RPV. This presentation briefly summarizes the findings derived from the sample analyses so far, focusing on the conditions at the sampling locations and the formation processes of the fuel debris.