Currently there is much high level radioactive waste water in the 
turbine buildings of Fukushima Daiichi Nuclear Power Station. On 
April 10th, from the Minister of Economy, Trade and Industry, we 
received an order of submission of a report regarding necessity and 
safety assessment on transfer of high level radioactive water in 
Fukushima Daiichi Nuclear Power Station to the Centralized Radiation 
Waste Treatment Facility, and a principle for a permanent storage 
method and treatment facilities.    
(previously announced on April 15th, 2011)

On April 18th, a leakage block measure, etc. for the Process Main 
Building in the Centralized Radiation Waste Treatment Facility was 
completed. Based on the above order, we compiled the results and 
reported to the Minister of Economy, Trade and Industry. The contents 
of the report were confirmed by the Nuclear and Industrial Safety 
Agency.  
(previously announced on April 19th, 2011)

Since April 19th, we have continuously conducted a transfer of high 
level radioactive water from the turbine building of Unit 2 to the 
Process Main Building of the Centralized Radiation Waste Treatment 
Facility. 
After that, because the water level of the radioactive waste water in 
the turbine building of Unit 3 has increased, we have conducted a 
leakage block work for the Miscellaneous Solid Waste Volume Reduction 
Treatment Building of the Centralized Radiation Waste Treatment 
Facility to secure a temporary storage space.  
On May 16th, because we completed the leakage block work, etc. we 
compiled the results based on the above order and reported to the 
Minister of Economy, Trade and Industry. The contents of the report 
were confirmed by the Nuclear and Industrial Safety Agency. Thus we 
started to transfer the high level radioactive waste water from the 
turbine building of Unit 3 to the Centralized Radiation Waste 
Treatment Facility. 
(previously announced on May 16th, 2011)

After that, we had transferred the radio active waste water to the 
Process Main Building and the Miscellaneous Solid Waste Volume 
Reduction Treatment Building. However, because the water storage in 
the Process Main Building was almost full and we found there was a 
possibility to leak to the nearby underground passage in the 
Miscellaneous Solid Waste Volume Reduction Treatment Building, we 
interrupted the transfer work.  
Under these circumstances, the water level in the turbine buildings 
of Unit 2 and Unit 3 has increased. In order to prevent a leakage to 
the outside system, we reviewed the water storage level of the 
Process Main Building and reported to the Nuclear and Industrial 
Safety Agency. 
(previously announced on June 4th, 2011)

We started a transfer of water in the turbine building of Unit 2 to 
the main process building since 6:39 pm on June 4th, and a transfer 
of water in the turbine building of Unit 3 to the surface condenser 
of Unit 3 since 6:26 pm on June 5th.  

This time, in order to reduce risks of leakage of water in the 
turbine buildings of Unit 2 and Unit 3 to the outside system, we 
reviewed the water storage level of the Process Main Building and 
reported to the Nuclear and Industrial Safety Agency.
(previously announced on June 8th, 2011)

We stopped the transfer of water in the turbine building of Unit 2 
to the Process Main Building at 8:40 am on June 16th. 
We also stopped the transfer of water in the turbine building of 
Unit 3 to the surface condenser of Unit 3 as the water volume 
reached its planned capacity at 10:44 am on June 9th. After that, 
we started a transfer of the water to the Process Main Building at 
10:05 am on June 14th and stopped the transfer at 8:46 am on June 
16th.
This time, in order to reduce risks of leakage of water in theturbine 
buildings of Unit 2 and Unit 3 to the outside system, we conducted an 
evaluation for risks of water leakage from nearby underground passage 
which had a possibility to leak to underground water, caused by re-
start of water transfer to the Miscellaneous Solid Waste Volume 
Reduction Treatment (High Temperature Incinerator Building). (The 
water transfer to the Miscellaneous Solid Waste Volume Reduction 
Treatment has been interrupted since May 25th.) We compiled the 
results and reported to the Nuclear and Industrial Safety Agency. 
(previously announced on June 17th, 2011)

As for the leakage of water in the turbine building of Unit 2, we 
started the transfer of water to the surface condenser of Unit 1 at 
1:37 pm on June 20th, and stopped the transfer at 5:09 pm on June 
21st as the water volume reached its planned capacity. We also 
restarted the transfer of water to the Process Main Building at 9:56 
am on June 22nd.
As for the leakage of water in the turbine building of Unit 3, we 
started the transfer of water to the Miscellaneous Solid Waste Volume 
Reduction Treatment at 1:31 pm on June 18th, and stopped the transfer 
at 0:02 am on June 20th as the water volume reached its planned 
capacity. We also restarted the transfer of water to the Process Main 
Building at 3:32 pm on June 21st.

This time, in order to reduce risks of leakage of water in the 
turbine buildings of Unit 2 and Unit 3 to the outside system, we 
reviewed the water storage level of the Process Main Building and 
reported to the Nuclear and Industrial Safety Agency. 

Attachment1: Further change in the storage level of waste water  
             transferred to the Process Main Building (summary) (PDF 60.0KB)