APR: your source for nuclear news and analysis since April 16, 2010

Tuesday, March 15, 2011

Fukushima Daiichi No. 2

Japanese television has given an integrated time of total fuel exposure of roughly six hours.. We wonder if that's fully accurate; it may be total time suspected of having NO coolant in the core. The wording of the statement is not too clear...

At Three Mile Island, without going now into great detail, there was a continuous loss of coolant (through a stuck open relief valve) for two hours and twenty minutes; the core cooling by water was lost gradually from the top downwards until most of the core was exposed. The core was not assured fully covered in borated water until some 16 hours into the chain of events at the plant. At that time, proper heat removal from the primary plant water was achieved.

This simple comparison will indicate to the reader the seriousness of the implications of known events at Fukushima Daiichi No. 2 even with no reactor operating experience whatsoever.

6:32 AM EST Tuesday 3/15

No comments:

Post a Comment