Tepco started stating molten fuel might be out of pedestal of Reactor 1

(Before It's News)

Tepco has been stating the molten fuel dropped into pedestal under RPV (Reactor Pressure Vessel), but started changing their tone since the end of 2014 for some reason.

Pedestal is a part of PCV (Primary Containment Vessel) under RPV surrounded by concrete. Tepco and the government of Japan have been saying though molten fuel had a core-concrete reaction in pedestal, but it stopped sinking in the concrete.

In their report published on 3/26/2015, Tepco admits the possibility that molten fuel has reached outside of pedestal at least in Reactor 1.

In this report, they did not mention the possibility that molten fuel went outside of PCV, however if the fuel is already outside of pedestal as suggested, they cannot remove the fuel from the top of RPV.

In order to inspect the potential fuel outside of pedestal, Tepco needs to investigate the subbasement floor of Reactor 1. It is reported that the feasibility of inspection would be confirmed in the end of 2015.

http://www.tepco.co.jp/nu/fukushima-np/roadmap/images/d150326_11-j.pdf

http://www.tepco.co.jp/nu/fukushima-np/images/handouts_111130_06-j.pdf

http://www.meti.go.jp/earthquake/nuclear/pdf/131031/131031_01f.pdf

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