Takahama (Japan)

Map of Takahama

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Unit -1: 780 MW PWR ; constructed by Westinghouse
Unit -2: 780 MW PWR ; constructed by MHI
Unit -3/4: 2*830 MW PWR ; constructed by MHI

Governor Nishikawa of Fukui Prefecture has approved the restart of the controversial MOX "Pluthermal" program at Takahama nuclear power plant operated by Kansai Electric Power Company (KEPCO) on 20 March 2004. The program has been dogged with problems and was already aborted twice previously. If executed, it would be the first occasion of Japan's MOX being used in conventional reactors.

Facilities in Takahama

plantreactor typconstruction startoperation startshut down
Takahama-1PWR19701974
Takahama-2PWR19711975
Takahama-3PWR19801984
Takahama-4PWR19811984
2008-02-04

In Takahama-3, during a periodic inspection, cracks were found on the inside of the primary coolant inlet piping nozzle stubs of stem generators A, B and C.
(source:http://cnic.jp/english/)

2007-12-04

In Takahama-2, during a periodic inspection, cracks were found on the inside of the primary coolant inlet piping nozzle stubs of stem generators A, B and C.
(source:http://cnic.jp/english/)

2007-10-02

During a periodic inspection, while testing extraction and insertion of the control rods, the control rod position indication system showed one rod near the full withdrawn position, when all rods should have been fully inserted. Cause: Foreign material appeared to have fallen between the control rod cluster guide tube and the control rod, preventing it from moving into place.
(source: source: http://cnic.jp/english/)

2002-01-30

"Damage to steam generator tube found during periodic inspection."
(source: http://cnic.jp/english/)

2001-07-06

Damage to 17 steam generator tubes found during periodic inspection of Takahama-3.
(source: http://cnic.jp/english/)

2001-04-19

Reactor power of Takahama-1 manually lowered due to coolant leak caused by 2 heat exchange tube ruptures in high pressure feed water heater.
(source: http://cnic.jp/english/)

2001-03-04

Power reduction due to steam leak into high pressure fead-water heater drain line of Takahama-2.
(source: http://cnic.jp/english/)

1995-08-30

Electrical short curcuit in aux. FW pump.

1995-08-24

Marine organism found in EDG cooler. EDG removed from line.

1995-05-11

Fuel assembly support plate damaged during inspection.

1995-03-01

Steam leaked through a side tube attached to the main FW piping; reactor manually stopped

1995-02-27

Tube rupture at FW heater; restart after plugging of the ruptured and 6 surrounding tubes

1993-08-18

Coolant pump piping leak

1992-04-23

Fuel rod clad damage found during inspection

1992-01-22

Rise of coolant radioactivity concentration due to damage to fuel cladding.

1991-03-20

Inadequate fitting of anti-vibration bars of SG tubes found. Reactor manually sropped. Utility decided to replace all AVBs in th SG (534). 9 of them were found to be incorrectly installed. Inspection followed the Mihama-2 accident, which was being blamed partly on faulty positioning of ABVs.

1989-12-15

Damage to 4 bolts of RC pump outlet vane

1988-12-08

Pin hole found in fuel rod during inspection

1988-08-17

Release of radioactivity to air due to crack in SG tube; reactor manually stopped.

1988-08-15

Holes in 2 fuel rods found during inspection

1988-08-01

Thinning and expansion of CR and neutron detector guide tube claddings found during inspection.