Thursday, June 16, 2011

#Fukushima I Nuke Plant: Leak Found, Water Treatment System Test Run Halted

TEPCO was running the test of the entire contaminated water treatment system since 12:20AM JST, June 16, but the test has been halted because of the leak found in one of the cesium absorption towers after 19 hours of running the test. The company was planning to run the test with the low contamination water for 30 to 40 hours before the full operation of the system with the high contamination water.

It looks to be part of the Kurion system which uses a series of towers filled with zeolite to absorb radioactive cesium.

Murphy's still alive and well at Fukushima.

From Asahi Shinbun (12:30AM JST 6/17/2011):

東京電力は16日、福島第一原子力発電所にたまり続ける高濃度の放射能汚染水を浄化処理する施設の試運転中に、一部の装置から汚染水が漏れ出したこ とを明らかにした。装置は自動停止した。水が漏れた場所を見つけて修理するのに少なくとも半日はかかりそうだという。17日に予定する浄化施設の本格稼働 が遅れる可能性が高まっている。

TEPCO disclosed on June 16 that there was a leak in one of the subsystems during the test run of the entire water treatment system that will treat high contamination water at Fukushima I Nuclear Power Plant. The system was shut down automatically. According to TEPCO, it may take at least half a day to identify the location of the leak and repair. It is increasingly likely that the full-scale operation of the water treatment system, which is scheduled to start on June 17, will be delayed.

 水漏れがあったのは、施設のうち、放射性セシウムを吸着させる円筒形の装置。午後7時20分に警報が鳴って装置が自動停止した。午後8時ごろ、作業員が 直径90センチ、高さ2・3メートルほどの装置を入れた金属製の箱に30センチほど水がたまっているのを確認したという。さらに箱の外にまで汚染水が漏れ だしていた。

The leak was found in one of the cylindrical equipment to absorb radioactive cesium. The alarm sounded off at 7:20PM JST [on June 16] and the system was shut down automatically. At 8:00PM, the workers went in and visually confirmed the leaked water 30 centimeter deep inside the metal box that houses the cylinder, 90 centimeter in diameter and 2.3 meter in height. The water had spilled outside the box, too.


TEPCO said the detailed investigation was needed to figure out what had caused the leak.


netudiant said...

Not good news.
The system requires some pressure to force the water through the cesium adsorbing cartridges, plus there are lots of joints involved. Some of them will inevitably leak, as we are seeing. TEPCO will probably need to plan the maintenance accordingly, because this is not going to get dramatically better over time. Obviously, the plant will leak, so TEPCO has to adjust the facility to be able to flush that water back to a collection point for reinjection into the process. This may take some more time, maybe set up a sprinkler system over the plant to flush any leakage.

Anonymous said...

Well, in a rare instance of TEPCO foresight, the Kurion system is set up inside a building.

Anonymous said...

Not related but: Is the official TEPCO live webcamera rigged?

Anonymous said...

Not related but:
This an image from 2011-06-11
This is another one from 2011-06-12:
A square structure (reactor building?) seems to have dissapeared!

Anonymous said...

Robbie001 sez:

1200 tons a day is looking less and less likely this is probably going to be a reoccurring theme too. I can foresee major issues when they start running "hot" and I doubt it will be a half day fix. Let's hope the automatic shutoff system never fails.

Anonymous said...

Robbie001 sez:

Let's compare and contrast summits and forums.

Third nuclear forum offers bleak assessment
Duxbury panelists say Pilgrim vulnerable to a laundry list of problems:

"Lockbaum said there was more fuel damaged at Fukushima than in all prior accidents combined and the only good news, he said, was that the destroyed reactor containment vessels allowed pathways for helicopters and fire trucks to put water on spent fuel pools".

Blanch suggested that the cables at many nuclear plants had never been approved for moist conditions and, as most plants were along rivers or other bodies of water, were often submerged in water for extended periods of time.
You can have a minor accident that causes a demand for power for pumps to cool reactors, a need for high current flow,” Blanch said, “and because they have been submerged they could fail, disabling important electrical systems.”

“True story,” Gunderson said, “two weeks before Fukushima my wife asked me where the next nuclear disaster would be. I said, I don’t know, but it will be a Mark I.”

Fukushima and the Nuclear Establishment:

"Not only is this nuclear establishment seeking to make it look like the Fukushima catastrophe has not happened—going so far as to claim that there will be “no health effects” as a result of it—but it is moving forward on a “nuclear renaissance,” its scheme to build more nuclear plants.

Indeed, next week in Washington, a two-day “Special Summit on New Nuclear Energy” will be held involving major manufacturers of nuclear power plants—including General Electric, the manufacturer of the Fukushima plants—and U.S. government officials".

Anonymous said...

I'm generally pro-nuc, but this is just getting to be embarrassing. Why didn't they use double-piping from the oil industry? Any leaks would be contained. From a Japanese company none-the-less:

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