Headquarters Daily Report JULY 08, 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 - HEADQUARTERS JULY 8, 1996 MR Number: H-96-0053 NRR DAILY REPORT ITEM GENERIC COMMUNICATIONS NRC Bulletin 96-04, "Chemical, Galvanic, or Other Reactions in Spent Fuel Storage and Transportation Casks," dated July 5, 1996. The NRC is issuing this bulletin to: (1) notify addressees about the potential for chemical, galvanic, or other reactions among the materials of a spent fuel storage or transportation cask, its contents, and the environments the cask may encounter during use, that may produce adverse conditions in cask loading/unloading/handling operations or degrade the integrity and performance of the cask; (2) request that all action addressees implement the actions described herein; and (3) require that all action addressees provide, to NRC, written responses to this bulletin, relating to implementation of the requested actions. Technical contact: Marissa Bailey, NMSS (301) 415-1314 _ REGION III MORNING REPORT PAGE 2 JULY 8, 1996 Licensee/Facility: Notification: Commonwealth Edison Co. MR Number: 3-96-0074 Byron 1 Date: 07/05/96 Byron,Illinois TELEPHONE CALL WITH SENIOR RESIDENT Dockets: 50-454 PWR/W-4-LP Subject: U1 MAIN TURBINE SYNCH. FAILURE, MAIN TURBINE OIL SEAL FAILURE, & 3 FWP. MALFUNCTIONS DURING PLANT STARTUP Discussion: On July 1, a main turbine teflon oil seal failed when it was extruded from its location when the turbine was rolled with steam, during a plant startup. The main turbine was manually tripped. On July 2, at 3:16 a.m. (CDT), the Unit 1 reactor was manually tripped in response to a loss of feedwater when the feedwater supply valve failed closed due to a faulty air supply line solder connection. The air line was repaired and the oil seal was replaced. At 6:30 p.m., criticality was achieved on Unit 1. On July 3, the operating main feedwater pump (1B) high pressure stop valve unexpectedly drifted closed. Operators started a motor driven feedwater pump, and continued the startup. Later that day, the licensee attempted to synchronize the main turbine generator onto the grid. When the licensee closed the generator output breaker 4-5, the West Main Power Transformer overcurrent relay actuated and caused an automatic trip of the main turbine. Ninety minutes later after the Unit 1 main turbine trip, a one inch steam drain pipe for the 1C feedwater pump broke apart causing a steam leak. The licensee performed an orderly shutdown of the 1C feedwater pump. (On July 4, 1996, after repairs to the broken drain line, the same drain line on the 1C feedwater pump broke apart at another location.) Licensee operators responded appropriately to each of these malfunctions, and the plant response was as expected and analyzed. On July 3, 1996, at 11:49 p.m. (CDT), the Unit 1 main turbine generator was successfully synchronized to the grid. Unit 1 is currently at 30 percent power with the main turbine generator on the grid. The licensee is continuing repairs on both the 1B and 1C steam driven feedwater pumps, and will remain below 30 percent power until one of the turbine driven feedwater pumps is repaired. The licensee is inspecting the steam drain pipes on both steam driven feedwater pumps. Regional Action: The resident inspectors have followed up on each of these malfunctions as they have occurred. The residents will continue to assess the licensee's corrective actions. Contact: LEW MILLER (708)829-9629 _