Headquarters Daily report JUNE 13, 1995 *************************************************************************** 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 II JUNE 13, 1995 Licensee/Facility: Notification: University Of Florida MR Number: 2-95-0056 Univ Of Florida Date: 06/13/95 Gainesville,Florida Dockets: 05000083 License No: R-56 100 KW ARGONAUT Subject: Loss of Scram Function Required by Tech Spec Reportable Event Number: N/A Discussion: On June 12, 1995, the licensee reported a tech spec violation involving the loss of one of four required scrams associated with primary coolant flow. The loss of scram function was discovered during the quarterly scram checks. A float type device was prevented from activating due to the presence of what appeared to be wire insulation. There was no indication of loss of primary outlet flow and the scram function has been repaired and tested. According to the licensee, the insulation was not of a type used around the reactor. If the piece of insulation had blocked flow through one of the fuel assembly channels, the licensee stated that they would have seen indication of a higher than normal temperature in one of the fuel boxes. The licensee plans to take the issue to the safety review committee on June 13 together with planned actions for review and approval prior to restart. Regional Action: The region will evaluate the licensee's proposed actions following their formal establishment by the safety committee. Followup inspection will be during the next routine inspection. Contact: E. J. McAlpine (404)331-5547 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III JUNE 13, 1995 Licensee/Facility: Notification: Commonwealth Edison Co. MR Number: 3-95-0110 La Salle 2 Date: 06/13/95 Marseilles,Illinois RI VIA TELECON Dockets: 50-374 BWR/GE-5 Subject: UNIT 2 START UP FROM REFUELING OUTAGE L2RO6 Reportable Event Number: N/A Discussion: Unit 2 began a startup on day 113 of a scheduled 67-day refueling outage. The reactor was taken critical at 10:35 a.m. on June 6, 1995. Condenser boot seal leakage problems ("A" condenser hood) delayed startup activities and the unit was synched to the grid at 0220 on June 11. A previous attempt to startup the unit on May 17 was unsuccessful due to problems encountered during the reactor coolant system heatup. The unit was shutdown and the problems addressed. They included: RHR shutdown cooling isolation valves leaking, RCIC steam supply isolation valve leaking, condenser boot seal leakage ("C" condenser hood), and nuclear instrumentation noise problems. The unit is presently in Mode 1 at approximately 20 percent power with startup testing ongoing. Regional Action: Based on the previous events, the resident inspectors are providing augmented coverage of the Unit 2 restart activities. Contact: B. CLAYTON (708)829-9602 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III JUNE 13, 1995 Licensee/Facility: Notification: Commonwealth Edison Co. MR Number: 3-95-0111 Quad Cities 2 Date: 06/12/95 Cordova,Illinois Dockets: 50-265 BWR/GE-3 Subject: CORE SHROUD INTERFERENCE PREVENTS INSTALLATIOIN OF STEAM SEPARATOR Reportable Event Number: N/A Discussion: On June 12, 1995, during reactor re-assembly activities, the licensee was unable to install the Unit 2 main steam separator. Two of four separator support legs (spaced 90 degrees apart) came in contact with two of the four upper support assemblies (cliff hangers) used for the recent core shroud repair. The "cliff hangers" are the upper attachment mechanism for the tie rods used to stabilize the core shroud in response to Generic Letter 94- 03. The licensee and General Electric are evaluating potential damage to the upper tie rod support assemblies and best course of action to repair and/or modify the equipment. It appears that the interference is a design error and not an installation error, i.e., the upper attachment mechanism is installed in accordance with design drawings. Regional Action: The resident inspectors are following licensee activities. Contact: P.L. HILAND (708)829-9603 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION IV JUNE 13, 1995 Licensee/Facility: Notification: Pacific Gas & Electric Co. MR Number: 4-95-0084 Diablo Canyon 2 Date: 06/13/95 Avila Beach,California Senior Resident Inspector Dockets: 50-323 PWR/W-4-LP Subject: UPDATE TO MR 4-95-0080, "Failure of 480 Volt Magnetic Contactor" Reportable Event Number: N/A Discussion: This is an update to June 8th Morning Report 4-95-0080 on the failure of a 480 volt magnetic contactor. During troubleshooting, the licensee had previously noted that a small chip of the magnetic contactor phase barrier material prevented proper contactor operation. The troubleshooting was initiated after motor operated Valve AFW-2-LCV-108 failed to close during surveillance testing. The licensee has completed a 100 percent inspection of all Westinghouse Model A201K1CA Size 1 magnetic contactors (the same type that failed in Valve AFW-2-LCV-108) installed in safety-related equipment. A visual inspection of the internal phase barriers was performed to determine if the phase barrier material was chipped or cracked. The inspection results revealed a number of contactors with chips or cracks in the phase barrier material. The licensee removed the phenolic material noted to be cracked and not securely bonded to the remaining material. Additionally, the contactors were manually overridden to enable measurement of the as-found closed contact resistance readings. Results from these readings indicated that there were no other instances where the phase barrier material chips interfered with proper magnetic contactor operation. All as-found readings indicated that the contactors were operable. The licensee's evaluation of the magnetic contactors with damaged phase barriers concluded that the damaged phase barriers were still capable of effectively isolating the phases. Inspections revealed the following percentages of magnetic contactors with cracked or chipped damaged phase barriers. 480 Volt Bus Number Inspected Number w/Damage Percentage Unit 1 Bus F 43 26 60 Bus G 61 36 59 Bus H 52 27 52 Unit 2 Bus F 43 7 16 Bus G 63 11 18 Bus H 52 8 15 The licensee is determining the long term corrective actions for this problem and has communicated with the vendor. Regional Action: The Senior Resident Inspector is following this issue. Contact: M. Tschiltz (805)595-2354 D. Corporandy (510)975-0319