Headquarters Daily report JUNE 01, 1995 *************************************************************************** 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 JUNE 1, 1995 Licensee/Facility: Notification: Southern Nuclear Operating Co. MR Number: 2-95-0049 Farley 2 Date: 06/01/95 Ashford,Alabama Dockets: 50-364 PWR/W-3-LP Subject: UNIT 2 MANUAL REACTOR TRIP Reportable Event Number: 28873 Discussion: On June 1, 1995, Unit 2 of the Farley Nuclear Plant was manually tripped from 30 percent power. The trip occurred at 12:58 a.m. All systems responded normally, with two minor exceptions. Operator actions were appropriate and conservative. The licensee notified NRC headquarters and the resident inspector (who responded immediately to the site). Unit 2 operators had placed the 2A Steam Generator Feedwater Pump (SGFP) in service only 5 to 10 minutes before the trip. The 2B SGFP was in standby while reactor power continued to remain on hold at 30 percent due to secondary system chemistry problems. Operators first noticed an unexpected speed reduction on the 2A SGFP and then miscellaneous alarms came in on both pumps. At the about the same time, an auxiliary operator called the control room to report that electro-hydraulic control (EHC) fluid was spraying from the 2A SGFP. (The EHC system is common to the main turbine and both SGFPs.) Due to reduced EHC fluid pressure, operators were unable to recover main feedwater flow. Furthermore, main turbine governor valves had begun to go close. Operators promptly tripped the main turbine and reactor. EHC pumps were also tripped to limit the discharge of EHC fluid. Subsequent inspection of the 2A SGFP pump skid determined that the EHC line to the high pressure governor valve had broken. The licensee is still investigating the cause of the break. There were two minor equipment malfunctions during the trip. The sequence of events computer failed just prior to the trip. The licensee suspects some power transient caused the computer to trip and reboot. Secondly, the first out annunciator for manual reactor trip did not annunciate as expected. The licensee is investigating both problems. Regional Action: The resident inspector responded to the site at the time of the event and is continuing to followup on the licensee's investigation. Contact: T. ROSS (404)331-5533 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III JUNE 1, 1995 Licensee/Facility: Notification: Iowa Electric Light & Power Co. MR Number: 3-95-0101 Duane Arnold 1 Date: 06/01/95 Palo,Iowa SRI VIA LAN Dockets: 50-331 BWR/GE-4 Subject: PLANT SHUTDOWN TO REPAIR MAIN CONDENSER TUBE LEAK Reportable Event Number: N/A Discussion: On May 31, 1995, at approximately 4:55 p.m. (CDT), the licensee elected to commence a controlled shutdown to a cold shutdown condition to identify and repair a circulating water system tube leak in the main condenser. The main turbine generator was removed from the grid on June 1 at approximately 5:28 a.m. The leak, approximately 0.5 gallons per minute, was identified on May 26, 1995, when an increase in main condenser hotwell conductivity was first identified. The outage is expected to last for 5 days, with startup planned for June 6. During the 5-day outage, the licensee also plans to perform maintenance on systems such turbine bypass valve, control rod drive cooling water, feedwater level control, and other balance of plant systems. Regional Action: Resident and regional inspectors observed portions of the plant shutdown and will continue to observe the remainder of the shutdown and the outage activities. Contact: R.D. LANKSBURY (708)829-9631