Press Release
Corrosion Holes in スポーツ賭け日本 Hamaoka Nuclear Power Station Reactor No. 5 Condensate Tank Lining
March 30, 2012Chubu Electric Power Co.,Inc.
In Hamaoka Nuclear Power Station Reactor No. 5 (advanced boiling water reactor; rated output 1,380 MW; currently under periodic inspection), inspection*2 of スポーツ賭け日本 lining of スポーツ賭け日本 condensate tank*1 has been carried out since October 2011, and 40 holes have been confirmed at and around スポーツ賭け日本 interior welded part until スポーツ賭け日本 present.(Reported on March 21, 2012)
A detailed inspection was then carried out on スポーツ賭け日本 40 holes (35 in スポーツ賭け日本 floor and 5 in スポーツ賭け日本 wall). スポーツ賭け日本 35 holes in スポーツ賭け日本 floor were divided into 26 spots. Upon removal of スポーツ賭け日本 corrosion holes for repair welding and conducting of foam tests to check for leakage,*3 foam was today confirmed to be present in 11 of スポーツ賭け日本 26 spots, which were therefore judged to be eaten through.
It was also confirmed that スポーツ賭け日本 5 holes in スポーツ賭け日本 wall were not eaten through.
スポーツ賭け日本 leakage detector installed in スポーツ賭け日本 condensate tank floor did not detect a water leak going outside スポーツ賭け日本 tank.
This incident has not caused any leakage of radioactivity to スポーツ賭け日本 exterior of スポーツ賭け日本 reactor.
From now, investigation into スポーツ賭け日本 cause of スポーツ賭け日本 corrosion holes and repair of スポーツ賭け日本 holes will be carried out. Inspection results will be reported once collected.
This incident is a reportable incident to スポーツ賭け日本 nation according to Article 19, Paragraph 17 of スポーツ賭け日本 Regulations for Installation and Operation of Practical Reactors.*4 It also requires notification according to スポーツ賭け日本 Safety Agreement.
*1 スポーツ賭け日本 condensate tank stores water essential for plant operation. This water is slightly radioactive. スポーツ賭け日本 tank is also used as a water source for スポーツ賭け日本 emergency core cooling system.
*2 Inspection of スポーツ賭け日本 condensate tank was conducted as an inspection concerning desalting that accompanies seawater inflow incidents and checking of スポーツ賭け日本 soundness of facilities and fuel.
*3 スポーツ賭け日本 foam test to check for leakage is a test that detects leakage spots by checking for スポーツ賭け日本 presence of foam from foam spray applied to スポーツ賭け日本 test surface.
*4 スポーツ賭け日本 formal name of スポーツ賭け日本 Regulations for Installation and Operation of Practical Reactors is スポーツ賭け日本 Rules Governing Installation and Operation of Nuclear Reactors for Practical Power Generation. These regulations are based on スポーツ賭け日本 stipulations of laws and regulations concerning nuclear reactors in relation to スポーツ賭け日本 establishment, operation, etc. of nuclear reactors for power generation.