Tepco started manipulating dosage of nuclear workers

On 4/26/2012, Tepco announced their new treatment about the seismic isolated building.



Press Releases

Press Release (Apr 26,2012)
Report submitted to NISA requesting a switchover to “Uncontrolled” status of certain areas at Fukushima Daiichi Nuclear Power Station’s Seismic Isolated Building

Following the March 11, 2011 Tohoku-Pacific Ocean Earthquake, we have designated the entire area of the damaged Fukushima Daiichi Nuclear Power Station as a “Controlled Area” in accordance with the standard set for “Radiation Controlled Areas”, and have conducted containment works. Furthermore, given the state of the radiation-infested outside air as well as the radioactive particles that found its way into the building through windows at the early stages of the accident, the Seismic Isolated Building has also been designated a “Controlled Area”.

Thus far, in order to improve the safety of the working environment at the Seismic Isolated Building where containment and decommissioning works are being implemented, we have worked to lower the radiation dose rate and improve the level of contamination in the area.

In particular, given the extreme importance of having experienced workers with field experience and specialized knowledge continue on with their supervisory work regardless of whether or not exposure dosage levels exceed 100msV from a safety perspective, we have implemented decontamination countermeasures targeting areas of the Seismic Isolated Building deemed necessary to reduce radiation dosage levels with the goal of finishing such work by the end of the transition period of the special ministerial ordinance*1 (April 30, 2012). As a result, we have confirmed that for the present time, certain areas of the Seismic Isolated Building are able to be treated as an “Uncontrolled area*2.

Thus, as a result of much deliberation, in accordance with the standard set for “Radiation-Controlled Areas we have established certain areas of the Seismic Isolated Building to be treated as “uncontrolled” during operations and prepared a report titled “Treating Certain Areas of Fukushima Daiichi Nuclear Power Station’s Seismic Isolated Building as Uncontrolled” that was today submitted to NISA.

We are planning to implement the new rule of treating certain areas of the Seismic isolated building as “Uncontrolled” following arrangements with relevant organizations.

We will continuously work to maintain the stable status of the Fukushima Daiichi Nuclear Power Station, reduce radiation dosage levels in the site and expand the number of “Uncontrolled areas”.

*1 Special ministerial ordinance
The special ministerial ordinance (“Special ministerial ordinance for special provisions of the “Regulation concerning Prevention from Radiation Hazards due to Ionizing Radiation” to respond to the situation caused by the Tohoku – Pacific Ocean Earthquake”) was set up to permit the temporary increase of the upper limit of the radiation dose level for workers engaged in emergency works to 250 mSv as long as deemed necessary to prevent the expansion of nuclear damage, in light of the situation at Fukushima Daiichi Nuclear Power Station.

*2 Uncontrolled area
The “Controlled area” is the area, where certain values (radiation dose of external radiation, surface concentration of contamination, radioactive concentration in the air) will exceed or likely exceed the limits specified in the law and requires special control of the radiation exposure. The “Uncontrolled area” is the area other than the “Controlled area”.



Tepco started manipulating dosage of nuclear workers

Actual Fukushima worker Happy11311 tweeted like these below,



Tepco decided to treat the second floor of the seismic isolated building as uncontrolled area, I finally figured out why by their press conference of today. It’s to make well experienced nuclear workers continue to work even after their total dosage exceeds 100mSv.





If their total dosage exceeds 100mSv, they can not be registered as nuclear worker until 3/31/2016. In other word, it means Tepco doesn’t have human resource to be familiar to Fukushima plants anymore. Those workers also get exposed in the hazard area and inside of the Fukushima plant area to get to the “uncontrolled area” of seismic isolated building, but Tepco ignores the dosage. hmmm..?





(*Context confused*)..anyway, it seems like a manipulation to make those workers keep working. Even the engineers from subcontract companies who had their total dosage exceed or exceeding 100mSv and can no longer be registered as nuclear worker in one year are many..



Source 1 2

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This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.


May 2012