Morning Report for April 29, 2003
Headquarters Daily Report APRIL 29, 2003 ******************************************************* REPORT NEGATIVE ATTACHED INPUT RECEIVED HEADQUARTERS X REGION I X REGION II X REGION III X REGION IV X PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION II APRIL 29, 2003 Licensee/Facility: Notification: Duke Power Co. MR Number: 2-03-0004 Oconee 3 Date: 04/29/03 Seneca,South Carolina Dockets: 50-287 PWR/B&W-L-LP Subject: INITIATION OF SPECIAL INSPECTION AT OCONEE NUCLEAR STATION Discussion: On April 21, 2003, while testing atmospheric dump valves (ADVs) in Unit 3 prior to shutting down for its scheduled refueling outage, the licensee identified a steam leak in the bonnet of the "A" main steam header ADV isolation valve (3MS-153). In addition, the "B" main steam header ADV isolation valve (3MS-155) could not be opened when initially tested. Approximately 1.5 hours later the licensee was able to open 3MS-155; however, this was outside the 40 minute window that the ADVs are required to be operated for certain accident mitigation sequences. Compensatory actions were implemented until the ADV function was no longer required following the Unit 3 shutdown on April 26, 2003. Historically, the manual valves which comprise the ADV flowpath in all three Oconee units have experienced problems that have impacted the operation of the ADVs. Regional Action: Region II, under the guidance of NRC management Directive 8.3, initiated a Special Inspection at the site on April 29, 2003, based on the repetitive failures and problems which have occurred with the manual valves that comprise the ADV flowpath. Contact: Robert Haag (404)562-4550
Page Last Reviewed/Updated Wednesday, March 24, 2021
Page Last Reviewed/Updated Wednesday, March 24, 2021