Semantic search
Jump to navigation
Jump to search
| Entered date | Event description | |
|---|---|---|
| ENS 42199 | 13 December 2005 06:42:00 | Point Beach Unit 1 was manually tripped at 0339 CST on 12/13/05 due to a loss of condenser vacuum caused by a mechanical failure of the running circulating water pump. All plant systems responded normally, including an auxiliary feedwater actuation. The trip was uncomplicated. All rods fully inserted. MSIVs were isolated due to the loss of condenser vacuum so decay heat is being removed by the atmospheric dump valves. The licensee indicated that there are no known steam generator tube leak issues. All systems functioned as required. The licensee was not in any significant LCO at the time of the trip. The trip had no impact on the electrical lineup or on Unit 2 operations. The cause of the circ water pump failure is still under investigation but there is evidence of sheared bolts on the pump coupling. The licensee noted the turbine condenser rupture disks blew due to high pressure. The licensee notified the NRC Resident Inspector. |
| ENS 40754 | 15 May 2004 15:12:00 | A Unit 2 manual reactor trip was initiated when the control room was notified that a diver was entangled in the intake crib. Divers were being used to inspect the intake crib, install buoys, and the fish deterrent system. The diver's umbilical cord became snagged and attempts to free it were unsuccessful. The Unit 2 circulating water system was secured to aid in removing the diver from the water. The diver still had breathing air available during the transient. The diver was subsequently removed from the water unhurt. Plant systems functioned as required, including the Reactor Protection and Auxiliary Feedwater Systems. There was no Emergency Core Cooling System actuation. Note: The condenser was unavailable because circulating water was secured. This caused a loss of condenser vacuum and its use as a heat sink. The atmospheric steam dumps are currently being used for heat removal from the steam generators. The circulating water system was subsequently restored to service. This event is reportable pursuant to 50.72(b)(2)(iv)(B), any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical and 50.72(b)(3)(iv)(A), PWR auxiliary feedwater system. All control rods inserted into the core. The electrical busses are in a normal shutdown line up. The licensee notified the NRC Resident inspector. |
| ENS 40743 | 13 May 2004 16:47:00 | A non-active licensed employee was determined to be under the influence of alcohol during for cause testing. The employee's access has been suspended to the Point Beach Nuclear Plant and all other Nuclear Management Company, LLC (NMC) sites. Contact the Headquarters Operations Officer for additional details. The licensee notified the NRC Resident Inspector. |
| ENS 40630 | 31 March 2004 18:02:00 | A non-licensed supervisor tested positive for alcohol during a "for cause" test. A review of the employee's work concluded that the individual had not been engaged in safety-related activities. The individual has been denied access to Point Beach Nuclear Plant and to all other Nuclear Management Company, LLC (NMC) sites. Contact the Headquarters Operations Officer for additional details. The licensee notified the NRC Resident Inspector. |
| ENS 40174 | 19 September 2003 01:22:00 | The licensee is implementing a limited suspension of Interim Compensatory Measures (ICMs) due to high sustained winds. The licensee will inform the NRC Resident Inspector. Contact the Headquarters Operations Officer for additional details.
The licensee has reimplemented all ICMs due to abatement of the adverse weather conditions. The licensee will inform the NRC Resident Inspector. Notified R1DO(Gray). |