Headquarters Daily report DECEMBER 14, 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 III DECEMBER 14, 1994 Licensee/Facility: Notification: Detroit Edison Co. MR Number: 3-94-0240 Fermi 2 Date: 12/14/94 Newport,Michigan resident office pc Dockets: 50-341 BWR/GE-4 Subject: fermi 2 readiness form restart - update Reportable Event Number: N/A Discussion: THE RESTART PANEL CHAIRMAN AND SEVERAL PANEL MEMBERS ARE ONSITE TO EVALUATE THE LICENSEE'S FINAL PREPARATIONS FOR RESTART. ONCE THE LICENSEE COMPLETES ITS RESTART CERTIFICATION CHECKLIST, WITH THE EXCEPTION OF SOME TURBINE WORK, DETROIT EDISON WILL PROVIDE A LETTER TO THE NRC DOCUMENTING COMPLETION OF WORK NECESSARY TO RESTART THE REACTOR. IF ALL RESTART ISSUES AND EMERGENT EQUIPMENT PROBLEMS HAVE BEEN SATISFACTORILY RESOLVED, THE RESTART PANEL CHAIRMAN WILL ISSUE A LETTER LIFTING THE CONFIRMATORY ACTION LETTER. THE LICENSEE ESTIMATES THAT IT WILL BE IN A POSITION TO PROVIDE THIS LETTER TO THE NRC BY THE END OF TODAY. Regional Action: INFORMATION ONLY Contact: m. phillips (708)829-9637 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III DECEMBER 14, 1994 Licensee/Facility: Notification: Commonwealth Edison Co. MR Number: 3-94-0241 La Salle 1 Date: 12/12/94 Marseilles,Illinois VIA ENS Dockets: 50-373 BWR/GE-5 Subject: RESTART OF UNIT 1 FOLLOWING THE DECEMBER 12, 1994, AUTOMATIC REACTOR SCRAM Reportable Event Number: 28140 Discussion: At 9:32 p.m. on December 12, 1994, Unit 1 was at 92 percent power when the Main Steam Line Isolation Valves (MSIVs) closed due to a spurious high main steam line (MSL) flow signal. This generated a reactor scram. Technical specification surveillance testing of the MSL high flow switches was in progress. The "D" channel was being calibrated when the "C" channel spiked. The "C" channel had been successfully calibrated earlier that evening. The flow switches are made by Static O-Ring Corp. and have had a history of drifting. Plant response following the scram was as expected, with the exception of the wide swings in reactor vessel level due to shrink and swell. Reactor vessel level was maintained using the condensate/feedwater system and RCIC; and SRVs were used for pressure control. These SRV actuations caused shrink and swell of reactor vessel level which caused RCIC turbine trips, feed system trips and two additional reactor scrams on low level. Suppression pool temperature rose to 114 degrees Fahrenheit and both trains of RHR where placed in suppression pool cooling. The licensee entered TS 3.0.3 because both trains of RHR were not available for automatic injection. Both trains were manually inhibited from transferring to the injection mode, due to concerns with potential waterhammer events. The licensee exited TS 3.0.3 at 5:00 a.m. on 12/13/94. The plant is presently in Mode 3 at 550 psig and the licensee is working on its forced outage list. ComEd is investigating the trip and tentatively plans to restart the unit on December 16, 1994. The "C" SOR switch was found to be defective and was replaced. Regional Action: The resident inspectors responded to the event and are following the licensee's investigation. Contact: BRENT CLAYTON (708)829-9602