Headquarters Daily Report NOVEMBER 27, 1995 *************************************************************************** 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 III NOV. 27, 1995 Licensee/Facility: Notification: MR Number: 3-95-0176 Advanced Medical Systems, Inc. Date: 11/27/95 Cleveland,Ohio LICENSEE NOTIFIED NRC ON 11-26 Dockets: 03016055 License No: 34-19089-01 Subject: BREAK-IN AT ADVANCED MEDICAL SYSTEMS, INC. LICENSEE NOTIFIED NRC ON 11-26-95 AND 11-27-95 BY TELEPHONE. Discussion: At approximately 8:00 a.m. (CDT) on November 26, 1995, the Radiation Safety Officer (RSO) at Advanced Medical Systems (AMS) contacted Region III to inform NRC of a break-in which had occurred at the AMS facility earlier that morning. According to the RSO, at 4:25 a.m. (EDT), a motion detector inside the AMS building triggered, which resulted in an alarm at AMS' security company. The security company immediately called the Cleveland Police Dept. and AMS' RSO and Alternate RSO (ARSO), and sent a guard to the site. At 4:58 a.m., the guard and the ARSO arrived at the site, entered the building, and saw an intruder, who quickly fled. At 6:00 a.m., the police arrived, and a search of the building commenced. The intruder was not located. The search revealed that the intruder entered the building by breaking a panel of the roll-up door at the back loading dock area. All interior locked doors remained locked. During a search of the grounds, a cart loaded with AMS' computer, fax machine, and some food items, was found next to a chain linked fence next to AMS' back parking lot. Nothing else, other than some additional food items, was found missing in subsequent searches. Regional Action: This information is current as of 8:00 a.m. (CDT) November 27, 1995. Contact: JOHN MADERA (708)829-9834 MICHAEL WEBER (708)829-9825 _ REGION IV MORNING REPORT PAGE 2 NOVEMBER 27, 1995 Licensee/Facility: Notification: Entergy Operations, Inc. MR Number: 4-95-0149 Arkansas Nuclear 2 Date: 11/27/95 Russelville,Arkansas Resident Inspector Dockets: 50-368 PWR/CE Subject: UNIT POWER REDUCTION TO REPAIR HYDROGEN LEAK IN TURBINE GENERATOR Discussion: On November 22, 1995, during power ascension from their 11th refueling outage, the licensee identified excessive hydrogen leakage from Bearing Seal 8 of the turbine generator. Reactor power had been raised to 29 percent when power ascension was curtailed. Power was reduced, the turbine generator was taken off line, and at 5:14 p.m. CST the licensee entered Mode 2 to repair the leak. The unit remains in Mode 2, and reactor power is currently at 1 1/2 percent. The licensee expects to return the turbine generator to service on November 28, 1995. Regional Action: The resident inspectors will perform routine monitoring of the power ascension. Contact: Terry Reis (817)860-8185 _ REGION IV MORNING REPORT PAGE 3 NOVEMBER 27, 1995 Licensee/Facility: Notification: Arizona Public Service Co. MR Number: 4-95-0150 Palo Verde 1 Date: 11/27/95 Wintersburg,Arizona Senior Resident Inspector Dockets: 50-528 PWR/CE80 Subject: AUTOMATIC REACTOR TRIP OF PALO VERDE UNIT 1 Reportable Event Number: 29642 Discussion: At approximately 9 p.m. (MST), the Palo Verde Unit 1 turbine tripped as a result of a malfunction of a condenser vacuum breaker, which opened and caused a loss of condenser vacuum. In response to the turbine trip, a reactor cutback to 35 percent was automatically initiated, and the steam bypass control system automatically actuated to control steam generator pressure. Only two of eight steam bypass control valves actuated, since six of the valves which dump to the condenser were automatically blocked due to the low condenser vacuum condition. The two steam bypass control valves which dump to atmosphere were not alone sufficient to reject core decay heat, resulting in four of twenty main steam safety valves lifting at 1250 psig (the atmospheric steam dump valves at Palo Verde are manually operated and are not designed to automatically actuate to prevent main steam safety valve lifting). The large increase in steam flow caused by the open safety valves resulted in swell of steam generator level, and caused an automatic reactor trip on high steam generator level at approximately 9:07 p.m. (MST). The high steam generator level also automatically actuated main steam isolation valve closure. Following the main steam safety valves lifting, one of the valves did not close until approximately 1170 psig and, subsequently, reopened briefly at 1170 psig, before plant operators took manual control of the atmospheric dump valves to control steam pressure below 1170 psig. The following anomalies are being investigated by the licensee as part of its post trip review: (1) malfunction of the condenser vacuum breaker, (2) low setpoint shift of one of the main steam safety valves, (3) some rod bottom lights were slow to activate following the reactor trip (proper rod insertion was independently verified), (4) one main steam isolation valve appeared to dump more oil than expected during actuation, (5) steam generator level and pressure indicated minor cycling following main steam isolation, (6) the nonsafety related auxiliary feedwater pump tripped (apparently involving a newly installed low suction pressure trip circuit), and (7) the Train B emergency chiller tripped due to a sticking float switch. The licensee expects to correct the identified problems and restart within 72 hours. Regional Action: The Resident Inspector was at the site and responded upon notification of the reactor trip. The resident inspectors are following the licensee's investigation. Contact: R. Huey (510)975-0342 K. Johnston (602)386-3638 _