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Why Tokai No. 2 Nuclear Power plant survived march

Kyusaku Natsume (1098) writes | more than 2 years ago

Japan 1

Kyusaku Natsume (1098) writes "In a potentially damning report, the japanese government panel probing the Fukushima Daiichi meltdown as learnt that the nuclear power plant Tokai No.2 avoided station blackout thanks to making a 6.1 m high seawall ended in September 2010, but TEPCO failed to do the same in Fukushima. From the article:
"The tsunami that hit the Tokai plant on March 11 were 5.3 to 5.4 meters in height, exceeding the company's earlier estimate but coming in around 30 to 40 cm lower than its revised projection.

After the tsunami hit, the Tokai plant lost external power just like Fukushima No. 1 did, because the sea wall was overrun, knocking out one of its three seawater pumps.

But its reactors succeeded in achieving cold shutdown because the plant's emergency diesel generator was being cooled by the two seawater pumps that survived intact.""

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It might have survived but just barely (1)

TheInternetGuy (2006682) | more than 2 years ago | (#37827168)

It may have survived, but it did so hanging on by a hair. The article only mentions the pumps, but in fact two of the three diesel generators were also out of order. These could easily have turned bad fast. Quoting Wikipedia. http://en.wikipedia.org/wiki/T%C5%8Dkai_Nuclear_Power_Plant#Incidents [wikipedia.org]

Following the 2011 TÅhoku earthquake and tsunami the number 2 reactor was one of eleven nuclear reactors nationwide to be shut down automatically.[4] It was reported on 14 March that a cooling system pump for the number 2 reactor had stopped working.[5] Japan Atomic Power Company stated that there was a second operational pump and cooling was working, but that two of three diesel generators used to power the cooling system were out of order.[6]

Also it remains to see if the reactor will survive politically. The Mayor of Tokai Mura has called on the government to decommission the number 2 reactor which is over 30 years old. There is a population of over one million people living within a 30km radius of the plant. And they have lost their confidence in the governments ability to safely run the plant. The well known Tokai Mura critically accidents a number of years ago probably didn't do much to boost their confidence either.

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