Tokyo Elec. Power : (Jan 20,2012)Receipt of the further directive document regarding the response to the accumulated water containing radio active materials in the trench at Fukushima Daiichi Nuclear Power Station

We have received directive document from NISA "Regarding Response to the

Accumulated Water Containing Radioactive Materials Found in Trench at

Fukushima Dai-ichi Nuclear Power Station (Direction)" on December 19 with

regards to the fact that we found the accumulated water in the trench

between process main building and miscellaneous solid waste volume

reduction treatment building(high temperature incinerator building) in the

centralized radiation waste treatment facility at Fukushima Daiichi

Nuclear Power Station on December 18, which contains radioactive materials.*1

(Previously reported on December 19, 2011)

In accordance with the directive document, on January 6, we have reported

to NISA regarding the situation of "1. To promptly transfer the water

accumulated in the trench to the equipment that can appropriately manage

the water", "2. To investigate the inflow route of the water accumulated

in the trench and to consider the water stoppage measures" and "4. To

formulate and implement the patrolling visual inspection and checkup plan

to check the existence of accumulated water containing radioactive

materials in other trenches".

(Previously reported on January 6, 2012)

Thereafter, while we have been implementing inspection of trenches within

the site of Fukushima Daiichi Nuclear Power Station and have been

determining existence of accumulated water and have been investigating

water level and density of radio active materials, today, we have received

directive document from NISA "Regarding Response to the Accumulated Water

Containing Radioactive Materials Found in Trench at Fukushima Dai-ichi

Nuclear Power Station (Further Direction)"*2

In accordance with the further direction, we will take smooth response and

report to NISA in a timely manner.

End

*1 "Regarding Response to the Accumulated Water Containing Radioactive

Materials Found in Trench at Fukushima Dai-ichi Nuclear Power Station

(Direction)"

(19.12.2011 NA No. 6)

On December 18, 2011, the Nuclear and Industrial Safety Agency (NISA)

received a report from your company stating that the accumulated water

containing radioactive materials was found in a trench at Fukushima

Dai-ichi Nuclear Power Station.

In light of the event of a large amount of water containing radioactive

materials accumulated in the trench, NISA requests your company to take

measures as described below and to promptly report the results of the

measures to NISA in order of implementation.

Required Items

1.To promptly transfer the water accumulated in the trench to the

equipment that can appropriately manage the water;

2.To investigate the inflow route of the water accumulated in the trench

and to consider the water stoppage measures;

3.To investigate the cause of the event that radioactive materials are

contained in the water accumulated in the trench as well as to take

recurrence prevention measures to prevent the water containing

radioactive materials from flowing into the trench;

4.To formulate and implement the patrolling visual inspection and checkup

plan to check the existence of accumulated water containing radioactive

materials in other trenches.

*2 "Regarding Response to the Accumulated Water Containing Radioactive

Materials Found in Trench at Fukushima Dai-ichi Nuclear Power Station

(Further Direction)"

(20.01.2012 NA No. 4)

[We have provided a Japanese press release version of the instruction

document received from NISA. However, at this time we have reserved the

right not to provide an English version due to potential misunderstandings

that may arise from an inaccurate rendering of the original Japanese text.

We may provide the English translation that NISA releases in our press

releases. However, in principle we would advise you to visit the NISA

website for timely and accurate information.]