Grand Gulf (USA)

Map of Grand Gulf

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BWR 1300 MW constructed by General Electric; grid connection in 1984

Facilities in Grand Gulf

plantreactor typconstruction startoperation startshut down
Grand Gulf-1BWR19741984
1993-09-01

date?? jet pump failure due to air leakage from MSR valve flange

1991-12-01

Replacement of recirculation pump shaft. because of a full circumferential crack which was throughwall at 2 points. Cracking of the shaft is believed to be caused by thermal cycling. The shaft was replaced 3 times since initial operation.

1990-12-10

loss of instrument air caused the feedwater pump minimum flow valve to fail open causing a decrease in reactor vessel water level -> scram, HPCS and RCIC started to maintain water level Cause: FAILED INSTRUMENT AIR SYSTEM PIPING JOINT (DEFECTIVE WORKMANSHIP).

1990-07-24

unit lost control of 1 of RFP´s , caused by a failed circuit in the controller, pump overfed the reactor -> scram

1990-07-24

Design error regarding the 125 VDC system may prevent loads from receiving sufficient energy to start and operate under DBA conditions, condition existed since initial operation

1990-07-06

availability of the HPCS system for long-term cooling could not be ensured. design error regarding the capability of the HPCS pump room cooler, condition existed since initial operation

1989-08-14

Failure of the condenser boot seals resulted in a scram with complications. One MSIV failed to close on manual and auto demand. One control rod failed to insert fully. scram discharge volume failed to drain.

1988-10-10

scram after HPCS injected, when operator keyed a radio near the low level transmitter

1988-09-15

potential failure of both emergency diesels, ruptured tubes discovered (intercooler adapter plate)

1988-09-15

Internal diffuser plate (guide vane) dropped into the intercooler causing it to leak .