Headquarters Daily report DECEMBER 12, 1994 *************************************************************************** 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 I DECEMBER 12, 1994 Licensee/Facility: Notification: Public Service Electric & Gas Co. MR Number: 1-94-0132 Salem 1 Date: 12/12/94 Hancocks Bridge,New Jersey SRI PC Dockets: 50-272 PWR/W-4-LP Subject: SERVICE WATER/CIRCULATING WATER INTAKE STRUCTURES GRASS INTRUSION Reportable Event Number: N/A Discussion: At 8:30 p.m. on 12/10/94, with Salem Unit 1 at 100 percent power, control room operators received service water low pressure alarms and service water pump strainer d/p alarms. At the time, operators had one service water pump in service on each header. Header pressures dropped from approximately 130 psig to 102 psig. Operators started one additional service water pump, which restored header pressure to normal. Operations determined that a small amount of grass and mud on the service water traveling screens caused the momentary service water header pressure reduction. Service water supplied components were not affected by the reduction in service water pressure over this relatively short period of time. At 12:28 p.m. on 12/11/94, with Salem Unit 1 at 100 percent power, the No. 13A circulating water pump emergency tripped due to excessive d/p while taking the No. 13B circulating water pump out of service for cleaning the associated trash rack. Operators commenced a power decrease at 5 percent/minute. Subsequently, the 12B pump emergency tripped, followed four minutes later by an emergency trip of the No. 12A pump. Operators reduced power to 51 percent and restored the 12 A/B circulating water pumps to service. Operations determined that a small quantity of grass had intruded upon the circulating water intake structure. The licensee noted that this was a relatively short duration event. Presently, the unit is stable at 50 percent power, with five of the six circulating water pumps in service. (Operators experienced problems with high motor amps on restoring the No. 13B pump.) The licensee is troubleshooting the No. 13B pump and holding power to monitor river grass levels. Regional Action: Resident Inspectors will continue to monitor the licensee's actions in view of previous grass intrusion problems that have affected Salem operations. Contact: John White (610)337-5114 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III DECEMBER 12, 1994 Licensee/Facility: Notification: Commonwealth Edison Co. MR Number: 3-94-0236 Braidwood 1 2 Date: 12/12/94 Braceville,Illinois SRI PC Dockets: 50-456,50-457 PWR/W-4-LP,PWR/W-4-LP Subject: SITE VISIT FROM ELECTRICITE DE FRANCE (EDF) Reportable Event Number: N/A Discussion: Officials from the St. Alban Nuclear Power Plant are touring Braidwood on December 12 and 13. The visit will include an exchange of information briefing between EdF and ComEd personnel. The visiting officials include Jean-Roger Regnier (Plant Director St. Alban), Marc Gaucher (Production Manager), and Philippe Reversat (Safety Manager). Regional Action: None Contact: S.G. DUPONT (815)458-2852 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III DECEMBER 12, 1994 Licensee/Facility: Notification: Cleveland Electric Illuminating Co. MR Number: 3-94-0237 Perry 1 Date: 12/12/94 Perry,Ohio RI VIA TELECON Dockets: 50-440 BWR/GE-6 Subject: SLOW CONTROL ROD SCRAM TIMES Reportable Event Number: N/A Discussion: During quarterly control rod drive scram time surveillance over the weekend, an excessive number of "slow" CRDs were identified. Of the eighteen CRDs in the surveillance sample, six exceeded the "slow" criteria in the technical specifications. Continued operation is not allowed by the technical specifications if greater than 20 percent (four) of the surveillance sample is "slow." Four additional CRDs were tested and two of them were "slow." Enforcement discretion was granted on 12/11/94 to allow the licensee to continue operating for up to five days with greater than 20 percent "slow" CRDs to allow completion of testing. The licensee has a General Electric safety analysis which shows that an additional 70 msec conservatism exists in allowed scram times. None of the slow CRDs have exceeded the 70 msec margin. The problem appears to be associated with the scram solenoid pilot valves, and more particularly with "Viton" seating material in these valves. Seven of the eight "slow" CRDs to date contain Viton from a lot (No. 314) associated with "slow" CRDs at the Grand Gulf plant earlier in the year. Regional Action: Coordinate with NRR in following licensee actions. Resident inspectors and a RIII engineering specialist are onsite. Contact: L.R. GREGER (708)829-9628 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION IV DECEMBER 12, 1994 Licensee/Facility: Notification: Houston Lighting & Power Co. MR Number: 4-94-0142 South Texas 1 2 Date: 12/12/94 Wadsworth,Texas Senior Resident Inspector Dockets: 50-498,50-499 PWR/W-4-LP,PWR/W-4-LP Subject: TESTING OF MOLDED CASE MAGNETIC CIRCUIT BREAKERS Reportable Event Number: 28129 Discussion: On December 9, 1994, in response to questions raised by an NRC inspector concerning the adequacy of surveillance testing of containment penetration overcurrent protection devices, the licensee determined that the acceptance criteria used in the past for adjustable magnetic breaker trip testing did not meet the Technical Specification requirements. After a review of test data indicated that the instantaneous overcurrent trip setting was not verified to be within the proper tolerance for 66 breakers (total in both units), the licensee proceeded to test or replace the affected breakers under the 72-hour action statement of Technical Specification 3.8.4.1. By 7 a.m. CST on December 12, the licensee had tested or replaced 43 of the breakers, including those which supply components required by Technical Specifications or which are important for continued plant operation or safe shutdown. The remaining 23 circuits had been deenergized as required by Technical Specification 3.8.4.1. Some of these will be tested and returned to service later this week. Regional Action: Conference calls were held on December 11 and 12 with the licensee, the resident inspector, the Regional office, and NRR. The resident inspectors will monitor the licensee's subsequent actions. Contact: Bill Johnson (817)860-8148