On 7/6/2014, Tepco announced the coolant system of Reactor 5 had a leakage failure to stop cooling the spent fuel pool.
Reactor 5 is shut down with Reactor 6, however they still need to keep cooling down the reactors and the spent fuel pools.
(cf, Reactor5 and 6 officially shut down as of today [URL])
From Tepco’s statement, the troubled coolant system is a seawater pump of a nuclear reactor auxiliary machine cooling system, which is to exchange the heat with the direct coolant water. They found approx. 1.3 t of coolant seawater leaked in Reactor5 building.
At 13:10 of 7/6/2014, Tepco suspended the coolant system of the spent fuel pool of Reactor 5 in order to stop the leakage.
The leaking point was a hole of 3mm diameter flow regulating valve.
The pool temperature was 23℃ when suspended. Tepco states they still have 9 days until it reaches the safety limit of 65℃.
However, it is not clear how they are going to fix the leaking point. Tepco hasn’t announced their next measures after the 10th day.Iori Mochizuki You read this now because we’ve been surviving until today.
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