Headquarters Daily Report FEBRUARY 23, 1996 *************************************************************************** REPORT NEGATIVE NO INPUT ATTACHED INPUT RECEIVED RECEIVED HEADQUARTERS û REGION I û REGION II û REGION III û REGION IV û PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION II FEB. 23, 1996 Licensee/Facility: Notification: Tennessee Valley Authority MR Number: 2-96-0015 Browns Ferry 1 2 3 Date: 02/23/96 Decatur,Alabama Dockets: 50-259,50-260,50-296 BWR/GE-4,BWR/GE-4,BWR/GE-4 Tennessee Valley Authority Watts Bar 1 2 Spring City,Tennessee Dockets: 50-390,50-391 PWR/W-4-LP,PWR/W-4-LP Subject: INTERIM TENNESSEE VALLEY AUTHORITY NUCLEAR (TVAN) ORGANIZATIONAL CHANGES Discussion: On February 21, 1996, Oliver D. Kingsley, Jr., President and Chief Nuclear Officer, announced the following interim TVA Corporate organizational changes to become effective March 4, 1996: Mark Medford, Vice President, Engineering and Technical Services, will become Acting Senior Vice President of the Customer Group. Dave Stinson, General Manager, Nuclear Projects, will become Acting Vice President, Engineering and Projects. John Maciejewski, General Manager of Nuclear Assurance and Licensing, will assume responsibility for all other functions of Engineering and Technical Services, including Nuclear Assurance and Licensing. Raul Baron will report to Mr. Maciejewski as Manager of Nuclear Licensing. Regional Action: None Contact: S. SHAEFFER (404)331-5583 _ REGION II MORNING REPORT PAGE 2 FEBRUARY 23, 1996 Licensee/Facility: Notification: Florida Power & Light Co. MR Number: 2-96-0016 Saint Lucie 1 Date: 02/23/96 Florida Dockets: 50-335 PWR/CE Subject: UNIT 1, DROPPED ROD AND MANUAL REACTOR TRIP Discussion: On February 22, 1996, at 10:03 a.m., while operators were performing CEA Periodic Exercise of CEA #57 (Group 4), CEA #20 (Group 2) dropped. Operators implemented the Off-Normal Procedure for a dropped CEA and rapidly reduced power from 100 percent to approximately 93 percent. Unit 1 entered TS Action Statement 3.1.3.1.e which allows one hour to investigate and reestablish CEA #20 within 7.5 inches indicated position of other CEAs in Group 2 (total of 8). A preliminary evaluation by I&C discovered that both 15V power supplies to CEA #20 were tripped due to blown fuses. At 11:05 a.m., Unit 1 transitioned to TS Action Statement 3.1.3.1.f which required operators to reduce power to <70 percent. CEA #20 was declared inoperable after fuse replacement and attempts to move the CEA were unsuccessful. Post trip investigations indicated that attempts to move the CEA were unsuccessful because the 'A' phase silicon control rectifier (SCR) for the CEA 20 Upper Gripper shorted. The shorted condition resulted in a phase overcurrent condition which blew fuses and deenergized the gripper coil allowing the CEA to drop. TS Action Statement 3.1.3.1.f allows for continued operation with an inoperable CEA provided all CEAs in that group can be aligned to within 7.5 inches indicated position of each other in one hour. Since the licensee was unable to comply with this action statement, this placed Unit 1 in TS Action Statement 3.0.3 as of 12:00 noon with a declaration of an Unusual Event at 12:05 p.m. due to operation beyond the time constraints of the TS Action Statement. The licensee noted that TS 3.1.3.1.e does not explicitly require shutdown for 1 CEA misaligned by 15 inches or more. A controlled shutdown was commenced with the unit anticipated offline by 2:00 p.m. At 1:00 p.m., operators received a low instrument air pressure alarm to the Feed Reg Valves (FRV). The NWE sent to investigate reported an air leak on the "A" FRV pneumatic supply line. At approximately 30 percent power, operators were unable to limit an increasing water level in the "1A" steam generator due to the instrument air leak which resulted in a loss of motive force for FRV control, accounting for unreliable FRV response. At 1:13 p.m., the NPS directed operators to initiate a manual reactor and turbine trip. The main feedwater pumps were tripped and the feedwater isolation block valves closed to prevent overfeeding the steam generators. Following the trip, both motor driven AFW pumps were started to maintain steam generator inventory with decay heat rejected to the main condenser. Other equipment problems identified during this transient included a failed narrow range steam generator water level indicator and cycling of the 5 percent steam bypass valve with the controller in auto. Unit 1 exited the Unusual Event at 1:30 p.m. with the unit stable in Mode 3. REGION II MORNING REPORT PAGE 3 FEBRUARY 23, 1996 MR Number: 2-96-0016 (cont.) Regional Action: The resident inspectors were onsite and reported to the control room shortly after the rod dropped to independently monitor plant performance. The residents are continuing to follow the licensee's corrective actions. Contact: E. LEA (404)331-3641 K. LANDIS (404)331-5509 _