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Saturday, 31 August 2013

Re: Videos: Leaks and the Olympics? Dilution the Solution coming, mark my words.... (not that they haven't from the outset)

The storage tanks were only built as a 'temporary measure' and were expected to last about 5 years.

Now rubber seals are giving way.

"TEPCO says the tanks that have leaked use rubber seams that were intended to last about five years. Ono said TEPCO plans to build additional tanks with welded seams that are more watertight, but will still have to rely on ones with rubber seams."

The following article is more than a bit disturbing, noting how one of the tanks had already been sinking two years back and needed to be emptied and reassembled. The article also notes that 'about 30%' of the 1000 tanks have rubber seals that can also fail.

"All five of the temporary tanks involved in the leaks were collapsible and held together by rubber seals, meaning they were less durable than those with welded seams.

Tepco spokesman Noriyuki Imaizumi said the tank passed a water-tightness test and other safety requirements after it was reassembled, but that the leak might have started when the seals began deteriorating, leading to contortions in the tank."

When considering how much 'hotter' the site became with less than 1/3 volume of one of the over 1000 tanks already built on the site, this has the potential to deteriorate to the point where little to no maintenance can be done should other seals start leaking as well.

HOW they think they should host the Olympics in 7 years is beyond me.

This scenario of newly built tanks with rubber seals already leaking two years back, on tanks that were only built to last 5 years, rings alarm bells for me.

At least 3 new tanks need to be built each week, every week to 'temporarily' hold the ever-increasing amounts of contaminated water.

[Can someone define what they mean by 'temporary'?]

This story from 2012 highlights the storage tanks:

""It's a pressing issue because our land is limited and we would eventually run out of storage space," the water-treatment manager, Yuichi Okamura, told The Associated Press in an exclusive interview this week...

..."The water's radiation level, measured about 50 centimeters (2 feet) above the puddle, was about 100 millisieverts per hour – the maximum cumulative exposure allowed for plant workers over five years, Ono said."

And, we all know how Japan raised the 'maximum exposure levels' for industry workers after the accident.

If you look at the picture showing how close together these tanks are, at 1000 tons of water each with each gallon weighing 8 pounds:

1000 tons = 1000 X 2000 pounds = 2 million pounds at 8 pounds each = 16 million pounds.

I do not know the size of the AREA NEEDED FOR EACH TANK, but I will estimate it at approximately 40 linear ft diameter, being somewhere under 1600 square feet. That load translates to 10,000 pounds load per square foot, not counting the weight of the tank itself.

Since many of these tanks are just hundreds of feet from shore, some of it landfill, I will assume that these loads may be a problem all by themselves. The 75' X 50' property next to me was not allowed to store 8 cars, with loads somewhere around 3600 ponds per square foot. NYC only allowed 5 cars.

Of course, I am not an engineer, and I do understand that the tanks are round, so I assume that the loads are even higher, especially with some tanks appearing not to have concrete foundations to sit on, while those on foundations have cracks.

Look at these pictures to see examples: [link to]

Finally, this is the ONLY article that I found which discusses the nature of why foundations have cracked in the past: [link to]

"Fukushima 1 Nuke Plant: RO Waste Water Tank That Leaked Had Been Moved from Another Area After Ground Sank

The layer beneath the concrete platform turned out to be not the amended soil with cement mixed in but concrete bits."

Last Edited by Esoteric Morgan on 09/01/2013 02:25 PM

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