Morning Report for June 18, 1999
Headquarters Daily Report JUNE 18, 1999 *************************************************************************** REPORT NEGATIVE NO INPUT ATTACHED INPUT RECEIVED RECEIVED HEADQUARTERS X REGION I X REGION II X REGION III X REGION IV X PRIORITY ATTENTION REQUIRED MORNING REPORT - HEADQUARTERS JUNE 18, 1999 MR Number: H-99-0053 NRR DAILY REPORT ITEM GENERIC COMMUNICATIONS Subject: Information Notice 99-19, issuing NRC INFORMATION NOTICE 99-19: Rupture of the Shell Side of a Feedwater Heater at the Point Beach Nuclear Plant, dated June 23, 1999 The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice to alert addressees to the recent rupture of the shell side of a feedwater heater at the Point Beach Nuclear Plant. Technical contact: K. Parczewski, NRR Nick Fields, NRR 301-415-2705 301-415-1173 E-mail:kip@nrc.gov E-mail: enf@nrc.gov _ REGION IV MORNING REPORT PAGE 2 JUNE 18, 1999 Licensee/Facility: Notification: Entergy Operations, Inc. MR Number: 4-99-0018 Waterford 3 Date: 06/18/99 Killona,Louisiana Dockets: 50-382 PWR/CE Subject: AUTOMATIC REACTOR TRIP AT WATERFORD 3 Discussion: On June 14, 1999, the Waterford 3 plant experienced an automatic reactor trip when the supply breaker to a nonsafety 6.9kV electrical bus tripped open, causing it to deenergize (Event Notification 35820). Loss of the bus resulted in loss of power to two of the four reactor coolant pumps and a subsequent reactor trip. The plant responded as expected following the loss of the electrical bus and the reactor trip. Following the trip, the licensee performed diagnostic testing and troubleshooting on circuits and components that could have caused the loss of the electical bus. These activities did not reveal any condition or component failure that could have caused the 6.9kV electrical bus to deenergize. The licensee was unable to identify the root cause of the event. The resident inspectors monitored the licensee's activities and reviewed their conclusions. No issues were identified. The licensee restarted the plant and connected the main turbine generator to the electrical grid on June 16. On June 17, Region IV conducted a conference call with plant personnel to discuss the scope and results of the root cause evaluation. No issues were identified. Regional Action: Resident inspectors will continue to monitor licensee followup activities associated with the reactor trip. Contact: PHIL HARRELL (817)860-8250 _
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Page Last Reviewed/Updated Wednesday, March 24, 2021