Daiichi Nuclear
Power Station
Unit 1
25 Oct. 18, 2008 to May 20, 2009
(215 days)
(1) Replacement of, and associated work on the cooling system piping at
the top of the reactor pressure and containment vessels *1
(2) Inspection related to the pipe wall thickness control
(3) Inspection regarding the cracking of the piping in the core shroud and
the reactor primary loop of the re-circulator
(4) Inspection related to the measure for stress corrosion cracking caused
by chlorides of stainless steel piping such as the piping in the control
rod drive hydraulic system
(5) Inspection in accordance with the interpretation of cracks and other
defects that may cause destruction of nuclear power generation
equipment