Wednesday, June 20, 2012

Ooi Nuke Plant: KEPCO Waited 10 Hours Before Announcing the Alarm and Leak, with NISA's Approval


Certain things will never change, nuclear accident or not.

From Jiji Tsushin (6/21/2012):

警報出ればすぐ公表=大飯原発、遅れ批判で-保安院
Responding to the criticism in delay in announcement regarding Ooi Nuke Plant, NISA says if an alarm sounds it will be promptly announced

 再稼働の準備が進む関西電力大飯原発3号機(福井県おおい町)で、発電機冷却系の警報の公表が遅れた問題で、経済産業省原子力安全・保安院は21日、「予期されていない警報などが出た場合は、安全への影響にかかわらず速やかに公表する」とのルールを決めた。

About the delay in announcing the alarm at the generator cooling system of Reactor 3 at Kepco's Ooi Nuclear Power Plant which is being prepared for the restart, the Nuclear and Industrial Safety Agency under METI decided on a new rule on June 21 that "if an unexpected alarm sounds, it will be promptly announced regardless of the effect on safety".

 大飯原発では19日午後9時50分ごろ、発電機冷却系のタンク水位低下を示す警報が鳴ったが、関電は安全上の影響はないとして、保安院の了解を得た上で10時間以上たった翌20日朝に公表した。

At Ooi Nuclear Power Plant, an alarm sounded at about 9:50PM on June 19 indicating the water level decreased in the tank of the generator cooling system. KEPCO decided that there was no effect on safety, and obtaining the consent from the NISA to do so announced the event in the morning of June 20, more than 10 hours after the event.


There was also a leak at the pump in the cooling system at Reactor 3 on June 19, and KEPCO also waited until June 20 to announce. According to Sankei Shinbun (6/21/2012):

関西電力は20日、大飯原子力発電所3号機(おおい町)で、発電機を冷やす水をタンクから送り出すポンプの一部から、わずかに水漏れしていたと発表した。前日19日夜のタンクの水位低下には影響なく、環境への影響はなかった。

KEPCO announced on June 20 that there was a slight leak of water from the part of the pump that transfers water from the generator cooling system tank. [According to KEPCO,] the leak had no effect on the water level decrease in the tank on the night of June 19, and there was no effect on the environment.

 関電によると、19日午後10時ごろ、水位低下が見つかった同3号機の発電機の冷却水タンク周辺を調べている際、現場作業員が微量の水漏れを発見したとしている。

According to KEPCO, a worker was inspecting the area around the generator cooling system tank of Reactor 3 at about 10PM on June 19, when he noticed a minute amount of leak.

 水漏れは、ポンプの部品を通った水に含まれる不純物を除去するチューブ部分。

The water leak was from the tube that removes foreign matters in the water running through the pump.

 関電は、チューブ接続部のボルトを締め、交換も検討している。

KEPCO has tighten the bolt at the connection of the tube, and is considering replacing it.


According to KEPCO's press release, the leak was 0.02cc/second. The press release has a PDF file with a diagram of the system, but it is hard for me to figure out what is what. The location of the leak is not immediately clear, and there is no photograph of the actual leak. It looks KEPCO needs to learn a little bit from TEPCO when it comes to communicating with the outside world. TEPCO's communication skills have improved over the past year under the unfortunate circumstance.



(I don't want to be too familiar with a pressurized water reactor. I don't want to do a self-inflicted crash course on one, like I did on the boiling water reactors in Fukushima as they blew up. Don't start Ooi Nuke Plant. I don't have time to learn a new reactor type. I don't want to even learn about a turbine generator. Don't do it. Learning a little about Mitsubishi's steam generators is already too much...)

15 comments:

Anonymous said...

This just proves the Japanese cannot be trusted with nuclear, a culture of cover up and downplaying things that are urgent...

Boy howdy said...

Let me tell you, these plants have so many pipes, pumps, wires, tanks, valves, switches, dipsticks, dingalings, doodads, dingledorps and dingdongs, that if their operating procedure was to tell the public all that's "out of order" all the time, they'd need a 24hr dedicated t.v channel broadcasting 24/7 for it.

Anonymous said...

It's the same in every human enterprise. People tend to delay reporting their own mistakes as long as they can.

This is one of the many reasons human beings are NOT COMPETENT to operate nuclear power plants. Men (and women) make mistakes, they sometimes cheat, they cut corners when they don't have enough money to fund perfect safety, they like to hide their mistakes, and they are often inclined to try to shift or escape blame when they are at fault.

Nuclear power requires perfection, and is extremely dangerous when perfection is not achieved. We as a species are incapable of perfection. Mankind has no business operating nuclear reactors. This is the MOST IMPORTANT LESSON Japan government should learn from TEPCO's disaster.

See the excellent Japanese and English essay Jonathan Schell at:
http://peacephilosophy.blogspot.jp/2011/06/nuclear-power-requires-perfection.html

This essay makes the argument very clearly and eloquently. Share it with everyone you know.

Lord Metroid said...

You can rest assured, most reactors build on the same principle on how the nuclear fuel is managed, the difference between the different types are mostly how the electricity is generated.

Anonymous said...

it is simple:
PWR = "we take this sh1t serious!"
BWR(*) = "got a heat-sink? let's put some pipes together."
-
(*)the generator and turbine get radioactive in a BWR and even if chain-reaction stops, you have to wait before you can approach them, because some stuff is still decaying with a 8 minute half-life there.

Anonymous said...

Leaking before powering up to 100%. That's a good thing, right?
arevamirpal, maybe just for one day you can be idle and gaze at the NRC animation for students...

http://www.nrc.gov/reading-rm/basic-ref/students/animated-pwr.html

Anonymous said...

Well they are to resume burning of radioactive debris in Kita Kyushu, crazy..

http://cinemaforumfukushima.org/2012/06/20/kitakyushu-city-proceeds-burning-radioactive-disaster-debris/


.....

Anonymous said...

you made me laugh. you are so right about having to learn yet another nuclear reactor.

not that it's a laughing matter.

the nukers have used our lack of interest and education to sneak all the craziness behind our backs.

but now, the cards are turning, the people have had enough, getting educated about the poison and getting dosimeters to protect themselves and be aware of the poison call radiation.

we've been forced by their dishonesty to become the new nuke police force. sharpen our pencils cos we need to protect ourselves against the stealth.

as ever, great effort mr ex-skf - hopefully you don't have to learn every reactor in the world.

Beppe said...

One problem with learning about npps is that you have to weed out all the bs that the pro nukers feed you; however the reward of learning how appalling this technology is is limitless.
For example, npps can not be completely turned off quickly: the nuclear reaction continues to generate a large amount of heat for days. Would you buy a car you can't turn off?
In a BWR control rods are inserted from the *bottom* so you have a huge numger of holes already open to let the fuel escape in case of a meltdown! Fukushima 1 were BWR, Oi is not.
cont'd

Atomfritz said...

To be prepared, just in case of a blow-up or blowout...

Does there exist an Ooi webcam?

Psalm Joseph said...

This is my first time I visited here. I found so many entertaining stuff in your blog, especially its discussion. From the tons of comments on your articles, I guess I am not the only one having all the leisure here! Keep up the good work.
protect america review

Soledad Knight said...

Considerably, this post is really the sweetest on this notable topic. I harmonies with your conclusions and will thirstily look forward to your incoming updates. Saying thanks will not just be sufficient, for the phenomenal clarity in your writing.
frontpoint security review

martha drewes said...

I would like to thank you for the efforts you have made while writing this post. I am hoping for the best work of the same from you in future.This is a really nice blog.Keep going your blog.Good article thanks for sharing.
frontpoint security review

Barbara Lee said...


I feel this blog is very well organized and is quite interesting. I really want to join this kind of events.Thanks for the post.

Security Glass

Judy Taylor said...

I wonder how you got so good. This is really a fascinating blog, lots of stuff that I can get into. One thing I just want to say is that your Blog is so perfect!
security systems reviews

Post a Comment