Headquarters Daily Report MAY 29, 1997 *************************************************************************** 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 - HEADQUARTERS MAY 29, 1997 MR Number: H-97-0057 NRR DAILY REPORT ITEM GENERIC COMMUNICATIONS NRC Information Notice 97-28, "Elimination of Instrument Response Time Testing Under the Requirements of 10 CFR 50.59," dated May 30, 1997. The NRC is issuing this information notice to alert addressees to changes to licensee-controlled documents made in accordance with Section 50.59 of Title 10 of the Code of Federal Regulations (10 CFR 50.59) that resulted in improper elimination of a technical specification surveillance test. Technical contacts: P. J. Loeser, NRR 301-415-2825 C. S. Schulten, NRR 301-415-1192 NRC Information Notice 97-29, "Containment Inspection Rule," dated May 30, 1997. The NRC is issuing this information notice to clarify for addressees the containment inspection rule in accordance with 10 CFR 50.55a(a), which in part endorses Subsections IWE and IWL of Section XI of the American Society of Mechanical Engineers' Boiler and Pressure Vessel Code (ASME Code). Technical contacts: Seung Lee, NRR 301-415-2737 Hans Ashar, NRR 301-415-2851 _ REGION IV MORNING REPORT PAGE 2 MAY 29, 1997 Licensee/Facility: Notification: Entergy Operations, Inc. MR Number: 4-97-0046 Waterford 3 Date: 05/28/97 Killona,Louisiana Senior Resident Inspector Dockets: 50-382 PWR/CE Subject: LOSS OF STARTUP TRANSFORMER B DURING MIDLOOP OPERATIONS Discussion: On May 28, 1997, at approximately 9 a.m. (CDT), Waterford Steam Electric Station experienced a loss of Startup Transformer B, which resulted in a loss of offsite power to the Train B electrical buses. Emergency Diesel Generator B started and energized the safety-related Train B buses. Prior to the transient, the plant was in Mode 5 with reactor coolant temperature at approximately 100 degrees F. Both trains of shutdown cooling were in operation and the reactor vessel water level was at midloop to support replacement of reactor coolant pump seals. The loss of Startup Transformer B resulted in a loss of Train B electrical loads, including Train B shutdown cooling and spent fuel pool cooling pumps. Reactor coolant temperature increased by 2 degrees F before Train A shutdown cooling stabilized the temperature. Within 1 hour, spent fuel pool cooling was restored. The licensee took immediate action by suspending all work activities that could impact electrical power and began actions to supply offsite power to Train B buses by backfeeding through the main transformer. In addition, the licensee restored the Train A spent fuel pool cooling pump to an operable status. At this time, the licensee has not identified the cause of the transformer loss. Regional Action: The Senior Resident Inspector monitored the licensee's response to the event from the control room. The resident staff will review the root cause of the transformer loss and associated corrective actions. Contact: Lee Keller (504)783-6253 Greg Werner (817)860-8269 _ REGION IV MORNING REPORT PAGE 3 MAY 29, 1997 Licensee/Facility: Notification: Omaha Public Power District MR Number: 4-97-0047 Ft Calhoun 1 Date: 05/28/97 Fort Calhoun,Nebraska Telephone call from SRI Dockets: 50-285 PWR/CE Subject: POWER REDUCTION TO REPAIR STEAM LEAK Discussion: On May 27, 1997, at approximately 3 p.m. (CDT), the licensee identified a steam leak on the drain line from Moisture Separator D. The leak was determined to be from a crack, approximately 1" in length, in a weld at the junction of a 6" and 14" pipe on the Moisture Separator D drain line. Reactor power was reduced to approximately 10 percent and the main turbine was taken off-line to perform the repair. The licensee determined that the cause of the leak was that a saddle and fillet weld were used to connect the piping sections when a full penetration weld should have been used. This weld was performed during initial construction approximately 25 years ago. The licensee repaired the leaking weld by grinding and rewelding the junction. Additionally, the licensee inspected the same location on the other three moisture separators and found that Moisture Separators A and B had full penetration welds as required. Moisture Separator C had the same weld configuration as D and a weld buildup was performed at that location. On May 29, as of 9:15 a.m., the licensee had synchronized the main generator to the grid and was increasing power. Regional Action: The resident inspectors are monitoring the licensee's activities. Contact: Wayne Walker (402)426-9611 _