http://fukushima-diary.com/2013/06/co-60-corrosion-product-detected-from-gas-samples-of-reactor1-2-and-3/
Co-60, corrosion product detected from gas samples of reactor1, 2 and 3
Posted by Mochizuki on June 9th, 2013 · 1 Comment
Related to this article..Ag-110m detected from gas sample of reactor1 and 3, “The boiling point is 2,164℃” [URL]
According to Tepco, they also detected Co-60 from the gas samples of reactor1, 2 and 3.
They state it’s a main corrosion product made from activation of structure material.
From the concentrated water of reactor3, they also measured 98,000 Bq/m3 of Mn-54 (Half-life : 312 days), which is also a corrosion product. Tepco announced the corrosion products from structural material activation, Co-60 and Mn-54 are detected from retained water as well.
Data
Reactor 1 : Co-60, 0.57 Bq/m3 from particulates filter
Reactor 2 : Co-60, 68,000 Bq/m3 from concentrated water
Reactor 3 : Co-60, 420,000 Bq/m3 from concentrated water
Mn-54, 98,000 Bq/m3 from concentrated water
Ag-110m detected from gas sample of reactor1 and 3, “The boiling point is 2,164℃”
Posted by Mochizuki on June 9th, 2013 · No Comments
According to Tepco, radioactive silver, Ag-110m was detected from air sample of the PCV of reactor1 and 3.
From late April to mid May in 2013, Tepco analyzed the PCV gas of reactor1 ~ 3. The samples are the concentrated water of the gas and the air filters.
As a result, they measured 0.92 Bq/m3 of Ag-110m from the particulates filter of reactor1 and1,000,000 Bq/m3 of Ag-110m from the concentrated water of reactor3.
The boiling point of Ag-110m is 2,164℃, half-life is 252 days.
As to this measurement, Tepco comment volatility of Ag-110m is big for silver iodide, it’s detected even from the environment.
http://ex-skf.blogspot.com/2013/06/fast-breeder-reactor-monjus-coolant.html
( This is a disaster in the making..... )
SATURDAY, JUNE 8, 2013
Fast Breeder Reactor Monju's Coolant Heating System Accidentally Switched Off for 30 Minutes, No Effect on the Environment, Says JAEA
JAEA again, this time on the fast breeder reactor Monju that this agency "operates" (if it can be called "operating").
Coolant for Monju, sodium, is supposed to be kept at 200 degrees Celsius.
So what's the excuse this time?
Their manual was not well written!
Do you trust these people to run a nuclear reactor, not to mention fast breeder reactor that uses liquid metal that explodes on contact with water and ignites on contact with air?
Do you trust these people to export nuclear reactors all over the world, claiming the superior technology and know-hows, including know-hows from "lessons learned from the Fukushima I Nuke Plant accident"?
Good luck, Czech Republic. Good luck, India, Vietnam, and Turkey.
From Kyodo News (6/8/2013):
もんじゅ、ヒーター停止 ナトリウム一時保温できず
Monju's heater stopped, sodium wasn't kept warm enough temporarily
日本原子力研究開発機構は７日、高速増殖炉原型炉もんじゅ（福井県敦賀市）で２日、電源設備の点検作業中に、２次系冷却材ナトリウムの温度を保つヒーターを誤って約３０分間停止させたと発表した。手順書の不備による作業ミスなどが原因とみられる。
Japan Atomic Energy Agency (JAEA) announced on June 7 that at Fast Breeder Reactor Monju (Tsuruga City, Fukui Prefecture) the heater to keep the secondary coolant, sodium, warm was switched off accidentally for about 30 minutes during the inspection of electric systems on June 2. The cause is attributed to human error due to poor instructions in the manual.
一部の配管で、ナトリウムは本来の２００度から約４０度下がったが、環境や原子炉への影響はなかったとしている。ナトリウムの融点は９８度程度。
In certain part of the pipe, the temperature dropped 40 degrees Celsius from the normal 200 degrees Celsius, but there was no effect on the environment or the reactor, according to JAEA. Melting point of sodium is about 98 degrees Celsius.
原子力規制庁や福井県、敦賀市には３日に通報した。公表が遅れた理由について原子力機構は「内規で通報が不要な軽微以下の事案だったため」としている。
JAEA reported to the Nuclear Regulatory Agency, Fukui Prefecture and Tsuruga City on June 3. The reason for the delay in reporting was, according to JAEA, because "it was the very minor incident that didn't require reporting, according to our internal [i.e. unofficial] rules".
So they blame the manual for the incident, but abide by the other, unofficial manual and decide they don't need to report it.
If they didn't notice the heater was off for another hour, they would have been in a big trouble (assuming the temperature drop is linear).
The footage of 1995 sodium leak accident is still there on the net, despite TV Asahi's copyright claim.
The Nuclear Regulatory Authority has already ordered JAEA to stop all the work for preparation for the restart, as 10,000 parts and equipments weren't maintained according to the schedule.
Again, good luck Czech Republic, India, Vietnam, Turkey. And many others, no doubt, now that Japan's Prime Minister Abe and President Francois Hollande of France have formed a formidable team to sell nuclear plants all over the world...
If they didn't notice the heater was off for another hour, they would have been in a big trouble (assuming the temperature drop is linear).
The footage of 1995 sodium leak accident is still there on the net, despite TV Asahi's copyright claim.
The Nuclear Regulatory Authority has already ordered JAEA to stop all the work for preparation for the restart, as 10,000 parts and equipments weren't maintained according to the schedule.
Again, good luck Czech Republic, India, Vietnam, Turkey. And many others, no doubt, now that Japan's Prime Minister Abe and President Francois Hollande of France have formed a formidable team to sell nuclear plants all over the world...
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