Headquarters Daily Report SEPTEMBER 02, 1998 *************************************************************************** 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 SEP. 02, 1998 Licensee/Facility: Notification: Part 21 Database MR Number: H-98-0135 Girard Development Date: 09/02/98 Subject: PART 21 - SHIPMENT OF STEEL OUT OF SPECIFICATIONS Discussion: VENDOR: Girard Development PT21 FILE NO: 98-58-0 DATE OF DOCUMENT: 08/03/98 ACCESSION NUMBER: 9808110220 SOURCE DOCUMENT: Letter REVIEWER: PECB, V. Hodge NEW ISSUE. The vendor reports that tests of its February 1998 shipment of ASTM A351 Grade CF8 cast stainless steel, which has a composition similar to that of ASTM 304 wrought stainless steel, to the Indian Point Station, the only recipient, showed the material contains more molybdenum than specified and less chromium than specified. _ HEADQUARTERS MORNING REPORT PAGE 2 SEPTEMBER 2, 1998 Licensee/Facility: Notification: Part 21 Database MR Number: H-98-0136 Westinghouse Date: 09/02/98 Subject: PART 21 - MISSING CENTER TRIP BAR PADS ON DB-75 CIRCUIT BREAKER Discussion: VENDOR: Westinghouse PT21 FILE NO: 98-59-0 DATE OF DOCUMENT: 08/12/98 ACCESSION NUMBER: SOURCE DOCUMENT: EN 34632 REVIEWER: PECB, D. Skeen NEW ISSUE. The Ginna licensee reports discovering that a Westinghouse DB-75 circuit breaker installed as an emergency diesel generator supply breaker to a 1E bus contained a center trip bar without pads. The licensee retrofit the breaker with an Amptector solid state trip unit in 1988, according to a 1985 instruction bulletin from Westinghouse Nuclear Services Division. This instruction bulletin specified removal of all three trip bar pads but was subsequently revised in 1989 to specify leaving the center trip bar pad installed. The revised instruction for Model DB-75 and DB-100 circuit breakers states: "LEAVE THE CENTER PHASE NYLON TRIP PAD ON THE TRIP BAR, it is required as a spacer for the mechanism." The licensee reports that the absence of the center trip bar pad allowed two bushings that support the trip bar to fall from their housing, and over time, allowed the bar to bend so that it would not fully reset, causing intermittent failure of the breaker to close on demand. Licensees that retrofitted DB-75 or DB-100 breakers with an Amptector solid state trip device before the revised instructions were issued on October 16, 1989, may wish to inspect those breakers to ensure the center trip pad is in place. Model DB-25 and DB-50 circuit breakers do not require the center trip pads to be left in place when Amptector trip unit retrofits are performed. _ REGION III MORNING REPORT PAGE 3 SEPTEMBER 2, 1998 Licensee/Facility: Notification: Indiana MR Number: 3-98-0061 Michigan Electric Co. Date: 08/31/98 Cook 1 2 SRI VIA TELECON Bridgman,Michigan Dockets: 50-315,50-316 PWR/W-4-LP,PWR/W-4-LP Subject: LOSS OF RESERVE POWER DUE TO A LOSS OF STATION TRANSFORMER Reportable Event Number: 34718 Discussion: On Monday, August 31, 1998, at approximately 3:20 p.m. (EDT), with Unit 1 and Unit 2 in Mode 5 and in an extended shutdown, the Number 2 Station Service Transformer located in the 765 kV switchyard catastrophically failed. The failure caused its associated feeder breaker (12CD) to open and actuated the differential relays (HEA) on transformers 101CD and 201CD (4.16 kV feeds to the "A" Train buses), opening the power supply and de-energizing safety and non-safety related buses C and D for both Units. The Unit 1 and Unit 2 CD diesel generators (D/Gs) automatically started and loaded, re-energizing safety- related loads for buses C and D. (Reference Event Number 34718). The East ("A" Train) Component Cooling Water Pump, East Essential Service Water (ESW) Pump, and North Non-Essential Service Water Pump auto started. The East Motor Driven Auxiliary Feedwater Pump received an auto start signal but did not start because its hand switch was in pull-to- lock. The auxiliary feedwater pumps had been properly removed from service. The time delay associated with D/G start caused the East ESW header pressure to drop and the West ESW Pump auto started on low header pressure as designed. Both units had the "A" train of Residual Heat Removal (RHR) and the "A" Centrifugal Charging Pump in service. The operators manually re-started these pumps after power had been restored to buses C and D. Power was also lost to the operating Spent Fuel Pool Cooling Pumps (Fed from "C" 600 V Bus). The South Spent Fuel Pool Cooling Pump was re-started at 4:10 p.m. (EDT) after the operators verified that this load was acceptable. Plant lighting was also placed on the D/G. Decay heat in each reactor vessel was minimal, as well as the decay heat in the spent fuel pool. Spent fuel bulk temperature increased 2 degrees Fahrenheit while the cooling pumps were off. Reactor vessel bulk temperatures did not have a measurable increase during the 1 to 2 minutes that decay heat removal was off and remained at about 170 degrees. At 3:58 p.m. (EDT) a Unit 2 low voltage alarm was received on the "AB" battery ("B" Train). The licensee determined that the output fuses for charger 2-AB2 had failed. Charger 2-AB1 was placed in service. Charger 2-AB1 was functional but administratively inoperable because of open technical questions regarding its AC input breaker reliability. The fuses were replaced to the 2-AB2 charger and it was returned to service. The 250 Vdc bus 2 AB remains available but inoperable pending additional troubleshooting. The resident inspectors were onsite at the time of the initial transformer failure and responded to the control rooms. The Senior Resident remained on site until normal power was restored to both units. Normal power was restored to Unit 2 at 11:26 pm and normal power REGION III MORNING REPORT PAGE 4 SEPTEMBER 2, 1998 MR Number: 3-98-0061 (cont.) was restored to Unit 1 at 00:49 am. The D/Gs were then secured and placed in standby. The residents will perform additional followup to the cause of Station Service Transformer Number 2 failure and the unexpected behavior of the 2-AB2 battery charger. Regional Action: Information Only Contact: B. BURGESS (630)829-9629 _