Nuclear fuel debris retrieval: Recommendation of using method of hardening with filler and retrieving. TEPCO plans to examine its feasibility over the next one to two years and decide on a method for retrieving the debris.
Shunichi Suzuki, a senior researcher at the University of Tokyo, has been researching this for eight years. In January this year, using a cement-based material called geopolymer which has a high ability to block radiation and is resistant to high temperatures, he simulated the size of the actual device 1/6.