Tuesday, April 26, 2011

#Fukushima I Nuke Plant: Reactor 4 Spent Fuel Pool May Be Leaking

Uh oh. The water level in the Reactor 4 Spent Fuel Pool is not rising enough, and TEPCO suspects a leak.

That's by the way what AREVA said in their presentation in March.

From Mainichi Shinbun (9:57PM JST 4/26/2011; links, emphasis added):


TEPCO disclosed on April 26 that there was a possibility of water leaking from the Reactor 4 Spent Fuel Pool. TEPCO has been injecting water into the Pool, but the water level hasn't risen to the level that they anticipated. [If there is a leak] it would require additional works to remedy the problem, and that may affect the "roadmap" to wind down the crisis.

 東電によると、プールには、使用済み核燃料集合体が1~3号機より多い1331体入っている。コンクリート圧送車での放水は、24日165トン、 25日210トン、26日160トン。しかし、1日の推定蒸発量約70トンを差し引いても水量が想定より12~48トン少ないという。東電は「格納容器へ 流れ出している可能性もある」と説明している。

According to TEPCO, the Reactor 4 Spent Fuel Pool contains 1,331 spent nuclear fuel rods, more than the Spent Fuel Pools in the Reactors 1 through 3. Using the concrete pump, 165 tons of water was injected on April 24, 210 tons on April 25, and 160 tons on April 26. Subtracting the daily estimated evaporation of 70 tons, the amount of water in the pool is 12 to 48 tons less than expected. TEPCO says it is possible that [the leaked] water is going into the Containment Vessel.


Earlier this month, the Reactor 4's reactor building's basement was found to be almost completely flooded with 5-meter deep contaminated water. Radioactive materials in the contaminated water in the turbine building was found to be 250 times as much as 1 month ago. The large amount of contaminated water [in the Reactor 4] poses a new challenge.


Anonymous said...

Robbie001 sez

I think there has always been a leak and the leak has gotten worse since Areva first mentioned it. Remember the NRC's original assessment was that SPF#4 was dry. I think the Hydrogen explosion damaged the pool and the subsequent aftershocks have made it worse. That's why TEPCO has become so concerned about the weight of water they are pumping. I just saw on NHK that TEPCO is going to shore up the pool with "concrete pillars" some time in.... July!!! Why don't they just start tossing in diapers and bath salts to control the leak?

It reminds me of a song:

The sun'll come out, tomorrow,
Bet your bottom dollar, that tomorrow,
There'll be sun.

Just thinkin' about, tomorrow,
Clears away the cobwebs and the sorrow, till' there's none,

Tomorrow tomorrow, I love you tomorrow,
You're always a day away.

Oh, the sun'll come out tomorrow,
So you gotta' hang on till' tomorrow,
Come what may.

Tomorrow tomorrow, I love you tomorrow,
You're only a day (or 3 months) away. (x10)

BTW, I've read they only have 50 of those little blue debris containers on-site!?!? What is it with these guys and the number 50? Anyway the article said they are being stored on-site and they have more containers on order.

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