Leakage from Piping Transferring RO-Concentrated Water to G-6 Tank Area

Print View Posted on: 18 May 2016

Event Date: 20 April 2016 Event Type: Power Reactor
Event Location: Japan, FUKUSHIMA-DAIICHI INES Rating: Not Applicable (Final)

Around 19:20 on 20 April 2016, TEPCO found that RO-concentrated water was leaking from a heat-insulating material of transfer piping to G-6 tank area.
Extent of soil contaminated by leakage was about 30 cm × 30 cm.
The leak was stopped after shut down of transferring RO-concentrated water.
The place concerned is approximately 70 meters away from the nearest drainage, and the possibility of flowing into the ocean is ruled out, so there is no impact on the environment.
The maximum amount of leakage estimated by TEPCO is 2.7 litres.

INES Rating: Not applicable (Final) as per 20 April 2016
Release beyond authorized limits? No
Overexposure of a member of the public? No
Overexposure of a worker? No
Contamination spread within the facility? No
Damage to radiological barriers (incl. fuel damage) within the facility? No
Degradation of Defence In-Depth No
Person injured physically or casualty? No
Is there a continuing problem? No

Hiromitsu Yoneyama - Nuclear Regulation Authority
Nuclear Regulation Authority
hiromitsu_yoneyama@nsr.go.jp
http://www.nsr.go.jp/english/index.html
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