Oyster Creek (USA)

Map of Oyster Creek

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620MW BWR constructed by General Electric; grid connection in 1969.

Facilities in Oyster Creek

plantreactor typconstruction startoperation startshut down
Oyster CreekBWR19641969

The NPP will very likely be the next unit designated for shutdown before its operating license expires.
Oyster Creek´s owner, GPU, Inc., announced that it couldn´t find a buyer for the 29-year-old BWR.
GPU has argued that it is in its costumers´ best interest to shut down Oyster Creek in 2000 - nine years before its operating license expires - because the unit simply isn´t economically competitive.
If, Oyster Creek is shut down in 2000, GPU will immediately start decommissioning it. Prompt removal and dismantlement is cheaper than putting the plant in monitored storaged and going with other decommissioning options that delay the start of the process.


Refueling and maintainance outage: since its last outage in December 1994 unit had operated with a capacity factor of 95%. During the outage it is planned to replace one of the three LP- turbines, 28 control blades. The RPV and core spray piping will be inspected.

The plants spent fuel pool will be full in 2000 unless some assemblies are moved to dry casks. The owner bought 10 Nuhoms casks, but it is not allowed to fill the casks during reactor operation: the reactor building crane is notlicensed to move anything heavier than one fuel assembly over irradiated fuel during operation.


SCRAM from full power when the water level in the reactor rose above the operating range.electronic fault caused a false indication of steam flow.


On 59th day of its refueling outage, vessel had been shut after refueling, an incident occured, in which the temperature of the reactor coolant rose above100°C for 6 hours without operators being aware of it. Inadequate procedure was the cause of the event which lowered the flow rate of the shutdown cooling pumps to 13.000 liters/min when 27.000 liters/min were required for adequate cooling.


Potential loss of power: during refueling one safety bus and one EDG were out of service for maintenance. No back feed was available because the main transformer was out of service.


Ground fault in a transformer cable led to a loss of power to half of the safety systems, included containment spray , core spray and several control systems. The cable failure led also to a leak in the drywell that exceeded 20 liters /min because certain pumps did not operate.


Fault on one side of el distribution panel caused loss of several pumps used for shutdown cooling (power:0)


Both isolation condensers inoperable due to water in the steam lines, could result in tube rupture if condenser required to perform RHR function.