Braidwood (USA)

Map of Braidwood

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2 * 1100 MW PWR constructed by Westinghouse; in operation since 1987/88

Facilities in Braidwood

plantreactor typconstruction startoperation startshut down
Braidwood-1PWR19751987
Braidwood-2PWR19751988
1995-11-15

Commonwealth Edison has decided that re-routing electrical cables at Braidwood will be cheaper than upgrading defective Thermo-Lag fire barriers to meet NRC requirements. NRC declared the Thermo-Lag barriers across the industry inoperable in 1992.
ComEd has been working with Transco Products Inc. and Darchem Engineering to adapt a different fire barrier, known as Darmatt, to upgrade/replace Thermo-Lag at its LaSalle, Braidwood, and Byron stations.
But the Darmatt job at LaSalle turned out to be expensive, approximately $ 21600 per meter installed.
ComEd spokesman Gary Wald said that after a "small scale, pilot project" at Braidwood, it was decided that re-routing would be "more cost effective".

1995-03-07

Mid-cycle inspection of SG found the tubes continuing to degrade at the rate predicted. Tubes plugged range from 2% to about 15% in the 4 SG.
SG replacement is planned for 1998 - ( also for Byron-1)

1993-10-23

SG tube leak: 1140 liters per day reached within 6 hours.

1990-10-04

Coolant leak outside containment during testing when RHR isolation valve was opened.

1990-09-06

Failure in the steam line break analysis, regarding the ability of the valves to isolate auxiliary feed flow to a faulted SG.

1990-04-16

One EDG inoperable because of a failed dropping resistor in the governor unit. Similar failures have ocurred at Braidwood-2 and Byron.

1989-12-01

260.000 liters of RCS water leaked through the suction relief valve of one of the RHR's trains. Unit was restarted after refueling outage; Relief valve opened below setpoint.