RIA Novosti, the Russian Internation News Agency, reported yesterday:
Tokyo Electric Power Company (TEPCO) on Friday found debris releasing 1,000 millisieverts per hour in an area south of the Number 3 reactor. This is the highest level of radiation found in debris left outside.
However, this was not the hottest debris TEPCO found:
Materials emitting 900 millisieverts of radiation per hour have also been found in the plant’s compound. The materials are believed to be part of the large amount of debris contaminated with radioactive substances that had been blown off in hydrogen explosions….
Here’s a link: http://en.rian.ru/world/20110522/164162389.html