Hatch (USA)

Map of Hatch

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2 BWR units 780 and 800 MW constructed by General Electric; grid connection in 1974 and 1978

Facilities in Hatch

plantreactor typconstruction startoperation startshut down
Hatch-1BWR19681974
Hatch-2BWR19721978
1993-11-01

date?? increased leakage into the drywell floor drain -> scram for investigation

1993-03-01

Search for a leaking fuel bundle, remove and inspection if other fuel bundles ar damaged.

1992-04-24

Single failure of a thermostat could result in a loss of ventilation to the service water intake structure could result in the loss of all 3 ventilation fans and subsequent Failure of the service water pumps and RHR pumps.

1992-04-24

Single failure of a thermostat could result in a loss of ventilation to the service water intake structure could result in the loss of all 3 ventilation fans and subsequent failure of the service water pumps and RHR pumps.

1992-03-28

scram on low vessel levelectrical a shift supervisor´s error had resulted in a momentary loss of power to the RX feed pump control system. pump flow fluctuated and the operators could not stabilize vessel levelectrical

1991-12-30

HPCI SYSTEM: oscillations during testing, caused by intermittent failures of relays in the HPCI control unit

1990-07-30

HPCI system inoperable because of a malfunctioning controller, due to a defective amplifier.

1990-06-10

Fire in 1 of 12 charcoal beds in the absorption system caused by a malfunctioning recombiner . The fire was indicated by increased levels of CO and CO-2. The charcoal absorber reached a temperature of 560 °C.

1990-01-12

MSIV´s closed while repairing a main condenser low vacuum switch , the swich failure caused the MSIV´s to go shut, resulted in scram, low reacor level caused HPCI injection, but injection valve failed in the closed position during a subsequent manual HPCI restart. cause a relay failure)

1988-05-27

scarm on low water level, RCIC failed to inject into the vessel; auto and manual turbine speed control failed