Morning Report for September 6, 2001
Headquarters Daily Report SEPTEMBER 06, 2001 *************************************************************************** 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 - REGION II SEP. 06, 2001 Licensee/Facility: Notification: Tennessee Valley Authority MR Number: 2-01-0017 Watts Bar 1 Date: 09/06/01 Spring City,Tennessee Dockets: 50-390 PWR/W-4-LP Subject: MANUAL REACTOR TRIP DUE TO STEAM GENERATOR LEVEL APPROACHING LO-LO LEVEL SETPOINT Discussion: The licensee has completed troubleshooting activities and corrective actions in response to the September 4, 2001, manual reactor trip. Unit 1 achieved criticality at 12:39 a.m., on September 6, 2001. The licensee's investigation determined that the loss of normal feedwater flow to the #1 SG occurred when the #1 SG feedwater regulating valve shut due to loss of a Vital AC Inverter. It was determined that an electronic card failure caused the loss of output from the vital inverter. The turbine driven AFW pump did start and inject feedwater into all SGs during the event. The 1A motor driven auxiliary feedwater pump (MDAFW) auto started, but did not provide feedwater flow to the SGs because the pump discharge pressure control valve failed closed due to the loss of power from the vital inverter. Plant operators secured the pump until power was restored to the vital AC bus from a maintenance power supply. Additionally, the 1B MDAFW pump did not automatically start, but was promptly started by a control room operator. During subsequent troubleshooting, the licensee physically inspected the most likely causes of the failure of the 1B MDAFW pump to auto start. In addition the pump was successfully stared twice using simulated automatic start signals. The licensee also conducted a test which included initiation of a loss of feedwater pumps actuation signal (same as for the event). All three AFW pumps successfully started. Despite this review and testing, the licensee was unable to determine the cause of the 1B MDAFW auto start failure. Reactor power level is currently at 20% and the unit is proceeding to full power operations. Regional Action: The residents are monitoring restart activities. Contact: Paul Fredrickson (404)562-4530 _ REGION II MORNING REPORT PAGE 2 SEPTEMBER 6, 2001 Licensee/Facility: Notification: Duke Power Co. MR Number: 2-01-0018 Catawba 1 2 Date: 09/06/01 York,South Carolina Dockets: 50-413,50-414 PWR/W-4-LP,PWR/W-4-LP Subject: MANAGEMENT CHANGES Discussion: Duke Energy Corporation announced that Mr. Mike Glover (currently Catawba's Operations Superintendent) will succeed Mr. Ron Jones as the Station Manager at Catawba. As previously indicated in Morning Report 2-01-0014, dated August 16, 2001, Mr. Ron Jones will be assuming the position of Station Manager at Oconee as of October 1, 2001. Mr. Glover's successor has not been announced. Regional Action: For information only. Contact: ROBERT CARROLL (404)562-4511 _
Page Last Reviewed/Updated Wednesday, March 24, 2021
Page Last Reviewed/Updated Wednesday, March 24, 2021