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Top > Releases ・ Announcements > Fukushima Daiichi NPS Prompt Report > 2014 > Recent topics:Water Leakage was identified at First Floor of Unit 3 Reactor Building at Fukushima Daiichi NPS

Fukushima Daiichi NPS Prompt Report 2014

Fukushima Daiichi NPS Prompt Report (Jan 21,2014)Recent topics:Water Leakage was identified at First Floor of Unit 3 Reactor Building at Fukushima Daiichi NPS

· WATER LEAKAGE WAS IDENTIFIED FOR THE FIRST TIME BY A ROBOT WHICH WAS REMOVING DEBRIS AT FIRST FLOOR OF UNIT 3 REACTOR BULDING.
· REACTOR STEADILY COOLED AND NO LEAKAGE TO THE OUTSIDE OF THE BUILDING.
· TEPCO WILL CONTINUE INVESTIGATING THE CAUSE AND THE SPOT OF THE LEAKAGE.
· CONTINUOUSLY, TEPCO WILL STEADILY ADDRESS THE DECOMMISSIONG WORK.

FUKUSHIMA, January 20, 2014 - Since July 2013, TEPCO has been using robotic devices to remove the debris, inside the Unit 3 Reactor Building.

On January 18, 2014, one of TEPCO's workers, who was monitoring the device's screen found out that water was leaking to the drainage ditch at the northeasts area of first floor, where the main steam isolation valve is located.

The area has proceeded with removing the debris and this was the first time inspecting the place.

The water is assumed to be flowing out from the Primary Containment Vessel and it is confirmed to be flowing to the basement of the Reactor Building where accumulated water exists and not flowing out of the building. No significant changes in the monitoring results at the power station are confirmed and the reactor is steadily cooled.

TEPCO will continue investigating and identifying the cause and the spot of the leakage.

The monitoring video is posted at
http://photo.tepco.co.jp/en/date/2014/201401-e/140118-01e.html

The result of radioactive analysis and the temperature are listed below.
[radioactive analysis: Date / January 19, 2013]
· caesium134 :7.0×102Bq/cm3
· caesium137 :1.7×103Bq/cm3
· cobalt60 :2.5×101Bq/cm3
· all beta :2.4×104Bq/cm3

[temperature: Date and Time / January 19, 2013, around 5:00 P.M.]
· Aprroximately 20 degrees celsius
*Temperature at surrounding area was approcximately 7 degrees celsius.
*Temperarure in water for coolant injection was also 7 degrees celsius.

TEPCO, Inc. is a provider of electricity to the Kanto region, which includes Tokyo and Yokohama. The company is headquartered in Tokyo. The Fukushima Daiichi Nuclear Power Station was struck by a tsunami after an earthquake that occurred in March 2011. For more information, please go to http://www.TEPCO.co.jp/en/index-e.html.