Headquarters Daily report SEPTEMBER 12, 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 - HEADQUARTERS SEP. 12, 1994 MR Number: H-94-0083 NRR DAILY REPORT ITEM GENERIC COMMUNICATIONS BRANCH/EVENTS ASSESSMENT BRANCH DIVISION OF OPERATING REACTOR SUPPORT OFFICE OF NUCLEAR REACTOR REGULATION Subject: N/A NRC Information Notice 94-65, "Potential Errors in Manual Brachytherapy Dose Calculations Generated Using a Computerized Treatment Planning System," was issued September 12, 1994. The NRC is issuing this information notice to alert addressees to an event involving errors in the calculation of dose tables and isodose curves for several brachytherapy treatments and to the potential for errors in computer-generated dose calculations for brachytherapy treatment plans. Technical contacts: Patricia K. Holahan, NMSS (301) 415-7847 Linda L. Kasner, RIV (817) 860-8213 PRIORITY ATTENTION REQUIRED MORNING REPORT - HEADQUARTERS SEP. 12, 1994 MR Number: H-94-0084 NRR DAILY REPORT ITEM GENERIC COMMUNICATIONS BRANCH/EVENTS ASSESSMENT BRANCH DIVISION OF OPERATING REACTOR SUPPORT OFFICE OF NUCLEAR REACTOR REGULATION Subject: N/A NRC Information Notice 94-65, "Potential Errors in Manual Brachytherapy Dose Calculations Generated Using a Computerized Treatment Planning System," was issued September 12, 1994. The NRC is issuing this information notice to alert addressees to an event involving errors in the calculation of dose tables and isodose curves for several brachytherapy treatments and to the potential for errors in computer-generated dose calculations for brachytherapy treatment plans. Technical contacts: Patricia K. Holahan, NMSS (301) 415-7847 Linda L. Kasner, RIV (817) 860-8213 NRC Administrative Letter 94-13, "Access to Nuclear Regulatory Commission Bulletin Board Systems," will be issued September 13, 1994. The NRC is issuing this administrative letter to inform addressees of the availability of NRC bulletin boards containing the Standard Technical Specifications, NRC generic communications, and files on several other subjects. Technical contacts: Andrew J. Kugler, NRR (301) 504-2828 Thomas G. Dunning, NRR (301) 504-1189 Kevin Ramsey, NMSS (301) 415-7887 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION I SEPTEMBER 12, 1994 Licensee/Facility: Notification: Philadelphia Electric Co. MR Number: 1-94-0103 Limerick 1 2 Date: 09/08/94 Philadelphia,Pennsylvania SRI PC Dockets: 50-352,50-353 BWR/GE-4,BWR/GE-4 Subject: D21 EMERGENCY DIESEL GENERATOR OVERSPEED Reportable Event Number: N/A Discussion: On August 26, 1994, with Unit 2 at 100 percent of rated power, an overspeed trip test was performed on the D21 emergency diesel generator (EDG) in preparation for the engine's 5-year overhaul. Limerick has eight Colt Fairbanks Morse Opposed Piston Engines (four per unit). During the performance of the overspeed trip test the engine's speed inadvertently exceeded a maximum indicated speed of 1500 rpm for 15 seconds. (The normal operating speed for the engine is 900 rpm.) The licensee's review of the event concluded that the test method prevented the overspeed trip from functioning. The maximum speed achieved was estimated to be between 1600 and 1700 rpm. The test method described in the test procedure directs an operator to mechanically bar the fuel rack with a large screwdriver, causing the overspeed trip. This method was approved by the vendor and had been successfully used to overspeed trip test all four Unit 1 EDGs and one of the other Unit 2 EDGs. During this event, however, the barring method was varied in that instead of a quick jerk of the screwdriver against the fuel rack, as had been done on the previous engines tested, a slow constant pressure with the screwdriver was applied to the fuel rack to increase engine speed to the trip setpoint. The operator's expectation was that the overspeed trip would occur between 1035 and 1053 rpm. Apparently, the pressure exerted by the screwdriver prevented the fuel control arm from pivoting (that is, going closed) following the overspeed trip actuation. The licensee contacted both the engine and generator vendors for a list of recommended items to be inspected/replaced as a result of the overspeed. The vendor representative for the engine was present for the complete overhaul and a vendor (The Louis Allis Company) representative for the generator performed an onsite inspection of the generator. The 5-year overhaul was completed with all appropriate inspections performed, and no indication of engine degradation was found. The engine is currently being operated in a series of break-in runs in preparation for a 24 hour continuous run. The licensee plans to perform the overspeed test at the completion of the 24 hour run. The licensee has acquired a special tool from Woodward Governor that can be attached to the governor to exercise the governor linkage to increase engine speed. This method will not impinge the fuel rack. Regional Action: The resident inspectors will continue to provide onsite coverage for D21 restoration activities and return to operable status. Contact: Clifford Anderson (610)337-5227 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION I SEPTEMBER 12, 1994 Licensee/Facility: Notification: Duquesne Light Co. MR Number: 1-94-0104 Beaver Valley 1 2 Date: 09/12/94 Shippingport,Pennsylvania Fax From Site Dockets: 50-334,50-412 PWR/W-3-LP,PWR/W-3-LP Subject: US AIR PLANE CRASH Reportable Event Number: N/A Discussion: The US Air flight 427 crash location is approximately 6 miles from the Beaver Valley Power Station. The crash occurred in Hopewell Township, and Duquesne Light personnel responded with emergency lighting equipment. Regional Action: This is for information only. Contact: Richard Conte (610)337-5183