Friday, April 13, 2012

"when the devil had ended all the temptation" - What Should Have Been Done in Fukushima

The Tokyo Station
Tokyo, Japan


What Should Have Been Done in Fukushima Daiichi

A Japanese scientist reviewed the Fukushima Daiichi accident to find what should have been done in the Fukushima Daiichi plant after the 3/11 Disaster of 2011.

1. Continue full efforts to have emergency engines run.

2. Add 1600 tons of water in the Isolation Steam Condenser (IC) to the cooling water.

3. Recover the sea-water pumps, damaged by the huge tsunami, so as to make them work and cool the water, from the Isolation Steam Condenser (IC), running through the pressure reactors.

4. Connect to external power supply to move the sea-water pumps.

http://jimnishimura.jp/tech_soc/chem_today1106/chem_todasy1106.pdf

In other word, cooling water must have been circulated by any means into and out of the pressure vessels of the reactor units No.1 to No.4 of the Fukushima Daiichi plant.   Then meltdowns of nuclear fuel must have been avoided.  As a result, hydrogen-gas explosions must have  been avoided.  And, to have the cooling water run, external power sources should be secured if emergency diesel generators inside the Fukushima Daiichi plant could not be used.

But in fact, an emergency grid line to the Fukushima Daiichi plant was cut off due to the M9.0 earthquake.  This grid was run by Tohoku Electric Power Company to distribute electricity from other generating plant, while electricity generated in the Fukushima Daiichi plant was transmitted to the Tokyo area through another grid run by Tokyo Electric Power Company (TEPCO).  The emergency grid line was prepared by Tohoku Electric Power Company to the Fukushima Daiichi as an emergency power source to various equipment in the Fukushima Daiichi for use when turbines for generating electricity from nuclear reactors were stopped and all the other diesel generators were also stopped in the Fukushima Daiichi.

The Japanese scientist also pointed a fact that then Japanese Prime Minister Mr. Naoto Kan refused to accept proposed help from the US immediately after the occurrence of the 3/11 Disaster.  The US reportedly offered help with a plan to fix the nuclear accident by decommissioning reactors of the Fukushima Daiichi plant.  Mr. Kan probably did not want to  scrap Fukushima Daiichi reactors.  But as days passed by without improvement of the situation, PM Mr. Kan began to accept support from the US, since the No.1 Reactor Unit of the Fukushima Daiichi plant was originally designed by US GE.

So, the nuclear accident could have been prevented if TEPCO and PM Mr. Kan had taken reasonable measures immediately after the reactor units of  the Fukushima Daiichi plant lost all the power sources, due to the big earthquake and the huge tsunami, needed to have pumps and other equipment run for cooling nuclear fuel inside the pressure vessels.

http://ja2gfg.jimdo.com/%E5%9C%B0%E9%9C%87%E7%99%BA%E7%94%9F11%E6%9C%88%E3%81%BE%E3%81%A7/
IC: Isolation Steam Condenser

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Luk 4:13 And when the devil had ended all the temptation, he departed from him for a season.