Fukushima Daiichi Unit 5 Begins Fuel Removal

TEPCO has begun work to remove fuel from the reactor to the spent fuel pool at unit 5 Fukushima Daiichi. Prior to fuel removal, work was conducted to test equipment and prepare for the work. Fuel will remain in the spent fuel pool.
http://www.tepco.co.jp/nu/fukushima-np/handouts/2014/images/handouts_141031_04-j.pdf
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Source: Fukushima Sub

Fukushima Unit 1 Had Part Of Cover Removed

In an unannounced move TEPCO removed one of the cover panels for the unit 1 building cover. They told the press they would leave it like this to see if the dispersal agents they sprayed earlier in the week were working. TEPCO’s current plant monitoring was insufficient to detect the massive release of radioactive dust during unit 3′s demolition work. No additional monitoring has been added at the plant or nearby to attempt to catch radioactive dust releases. TEPCO has used brief dust monitoring near the reactor buildings by dangling a dust monitoring unit briefly over the reactor building. This is not done during actual demolition work and is only for a brief time, making it ineffective to actually “see” the true picture of what is going on. Normally a dust monitor runs for a long period of time (days, weeks) to obtain a sample.
http://photo.tepco.co.jp/date/2014/201410-j/141031-01j.html
http://www.japantimes.co.jp/news/2014/10/31/national/tepco-cracks-open-weather-shield-covering-reactor-building-fukushima-1/#.VFOkP_nF8rk
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Source: Fukushima Sub

4 Nuclear Stories This Week That Will Make You Sleep With The Lights On

Hanford’s Toxic Mystery Gas
Workers have been complaining for a long time about exposure to toxic gasses from the decaying tank farm at the Hanford nuclear site in Washington state. In the last year multiple workers had been taken to the hospital after smelling odd smells while working at the tank farm. A some workers have come forward after being so disabled and ill they could not longer work. Meanwhile DOE and the contractor that manages the work on the tank farm insisted there was no risk and that they were not liable because gas masks were available on site.
A new study by a 3rd party group of experts from the Savannah River nuclear site found that there is a risk and that workers were likely exposed to toxic gasses that were either not properly detected or were explained away by the process the contractor used to record monitoring data.
King 5, …

Source: Fukushima Sub

Fukushima Unit 1 Fuel Removal Delayed

TEPCO announced they would delay the removal of both spent fuel from the pool and from the reactor vessel at unit 1, Fukushima Daiichi. What is not clear is exactly why. TEPCO cited having to remove excessive debris from the buildings. They have known the conditions inside the building and the refueling floor for a number of years. Investigations into the building and refueling floor began as early as 2011 with an in depth screening of the refueling floor done in 2013. No detailed recent investigative work at unit 1 has been admitted and no new findings about the condition of the building have been released in recent months.
There has been some delay while they spray fixative and take a more cautious approach to removing the building cover, but that is currently only expected to cause about a 6 month delay. This new schedule puts spent fuel removal at 2019 …

Source: Fukushima Sub

Bypass water discharge increased groundwater level in Fukushima plant

Related to this article.. Tepco announced bypass project decreased 130 t / d of water / Worker “No supportive data” [URL]

Contrary to expectation, bypass water project increased a part of the groundwater level, from Tepco’s report released on 9/25/2014.

On 9/16/2014, Tepco compared the groundwater level at 3 sub-drains beside the reactor buildings to the water level before bypass water project.

As a result, in 2 sub-drains the recent water levels didn’t show significant improvements from the regression line based on the data from 4/1/2012 to 5/20/2014, which Tepco concluded that “Water level decreased at least by 10 ~ 15cm due to bypass water project”.

In the 3 rd sub-drain, the recent water levels were above the regression line for some reason, which means the water level went higher than before. Regarding this data, Tepco stated “No decrease of groundwater level was observed” however Professor, Okamoto from Tokyo University, a member of contaminated water task force commented Tepco should clearly state the water level INCREASED due to the bypass project.

The exact cause is not identified yet, however Tepco simulated groundwater bypass would end up gathering water from the surrounding areas in 2013 by themselves.

http://www.tepco.co.jp/nu/fukushima-np/roadmap/images/d140925_07-j.pdf

http://www.tepco.co.jp/nu/fukushima-np/roadmap/images/d141030_03-j.pdf

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Français :

Dans la centrale de Fukushima, la dérivation des eaux souterraines a fait monter leur niveau

Article lié : Tepco annonce que la dérivation a fait baisser l’eau de 130 t/j : Un travailleur : “pas de données pour le prouver”

Selon un rapport de Tepco du 25 septembre 2014 et contrairement aux attentes, la dérivation des eaux souterraines a fait monter le niveau d’une partie des eaux souterraines.
Le 16 septembre 2014, Tepco avait comparé le niveau des eaux souterraines de 3 sous-drains à côté des bâtiments des réacteurs par rapport à ce qu’il était avant le projet de dérivation.

Au final, dans 2 des sous-drains les niveaux récents ne présentent pas d’amélioration suivant la ligne de régression basée sur les données établies entre le 1er avril 2012 et le 20 mai 2014 sur lesquelles Tepco avait conclu que “le niveau de l’eau a diminué d’au moins 10 à 15 cm grâce au projet de dérivation des eaux.”
Dans le 3e sous-drain, les derniers niveaux relevés étaient au-dessus de la ligne de régression, ce qui signifie que le niveau de l’eau est monté au-dessus des précédents relevés. Concernant ce résultat, Tepco affirme que “aucune diminution du niveau des eaux souterraines n’a été observé” et le professeur Okamoto de l’Université de Tokyo, membre du groupe de travail sur les eaux extrêmement radioactives, a déclaré que Tepco devrait clairement affirmer qu’à cause du projet de dérivation le niveau de l’eau est MONTÉ.

La cause exacte de cette montée n’est pas encore établie, néanmoins en 2013 Tepco avait fait leur propre simulation de la dérivation des eaux souterraines et elle montrait que la dérivation finirait par drainer à elle les eaux des alentours.

http://www.tepco.co.jp/nu/fukushima-np/roadmap/images/d140925_07-j.pdf
http://www.tepco.co.jp/nu/fukushima-np/roadmap/images/d141030_03-j.pdf

The post Bypass water discharge increased groundwater level in Fukushima plant appeared first on Fukushima Diary.

Source: Fukushima

Fukushima US Sailor Lawsuit Upheld, Now Includes GE, Hitachi, Ebasco, Toshiba

A US court upheld the lawsuit brought by hundreds of sailors exposed to radiation as part of the response to the Fukushima Daiichi disaster. The lawsuit originally was just against TEPCO. Along with this news that the district court has upheld the suit so it can move forward, the cause now includes GE, Hitachi, Ebasco and Toshiba as defendants. The list of new defendants includes all the parties involved in the design and construction of the reactors at Fukushima Daiichi. Greenpeace had previously brought this issue up, that the designers and construction companies responsible for the failed plant should be held liable for the massive failure during the disaster.

(Press Release via Nuclear Hotseat from the lawyers handling the case)

PRESS RELEASE FOR IMMEDIATE RELEASE
Contacts: Charles Bonner & Cabral Bonner & Paul Garner, Esq.
760.671.8183 pcg@garnerlaw.com c/o
The Law Offices of Bonner & Bonner
charles@bonnerlaw.com cabral@bonnerlaw.com
475 Gate Five Road, Suite 212, Sausalito, CA 94965
Ph: 415.331.3070; …

Source: Fukushima Sub

Fukushima; Radiation Spike In Unit 1 Discharge Canal

TEPCO hasn’t released radiation readings for the set of discharge canals for well over a year. This location has been historically quite high when they sampled it before. TEPCO announced that the sampling location in the discharge canal was again quite high while a downstream location was not. They provided no explanation where they assume the highly contaminated water is migrating to.
Beta radiation: 120,000 bq/liter
Cesium 134: 31,000 bq/liter
Cesium 137: 95,000 bq/liter
TEPCO closed off the end of the discharge canal early on in the disaster during attempts to block highly contaminated water from continuing to leave the plant. This admission comes soon after admissions of high level land side leaks from the unit 2 reactor building and increases in the sea front monitoring locations in the path of the unit 1 contaminated water plume.
http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/around_1u_14102901-j.pdf

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Source: Fukushima Sub

Fukushima Groundwater Contamination Rises To Nearly Double Previous Reading

Seafront well 1-6 began to rise again after it had begun to drop after the most recent typhoon. It nearly doubled, from 1.4 million bq/liter of beta radiation on the 23rd up to 2.5 million bq/liter on the 27th. TEPCO gave no reason for the jump.
This grouping of monitoring wells is assumed to be located in the path of the underground plume of highly contaminated water from unit 1. They are also located near the trench full of contaminated water near unit 2′s intake canal.
These ongoing findings of contamination spikes add to the understanding of how the damaged reactors are leaking. They also show how little TEPCO actually knows or admits about the extent of those leaks.
http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/2tb-east_14102801-j.pdf
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Source: Fukushima Sub