Headquarters Daily report AUGUST 11, 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 AUGUST 11, 1994 Licensee/Facility: Notification: Consumers Power Co. MR Number: 3-94-0145 Palisades 1 Date: 08/11/94 Covert,Michigan sri via pc Dockets: 50-255 PWR/CE Subject: OVERFLOW OF RADIOACTIVE WATER FROM OUTSIDE STORAGE TANK Reportable Event Number: N/A Discussion: On August 9,1994, the licensee discovered an overflow of water from the valve pit adjacent to the Primary System Storage Tank and the Utility Water Storage Tank, T-90 and T-91 respectively. Subsequent evaluation determined that the water was coming from tank T-91, which receives distillate from the dirty waste evaporator. Health Physics took immediate action to rope off the area and obtain soil samples. Soil samples around the tank where the overflow occurred indicated low levels of activity. The licensee has removed some contaminated soil and is continuing to perform a more detailed radiation survey to determine the extent of contamination. The licensee is presently lowering the tank level by batching the contents of the tank to the lake. Once the valve pit was pumped down the licensee was able to determine that the leak is on a recirculation line in the valve pit. The leakage is presently confined to the valve pit. Regional Action: The resident inspectors along with regional inspectors are continuing to follow the licensee's actions. Contact: M.E.PARKER (708)829-8971 J.MCCORMICK-BARGER (708)829-9872 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III AUGUST 11, 1994 Licensee/Facility: Notification: Toledo Edison Co. MR Number: 3-94-0146 Davis Besse 1 Date: 08/10/94 Oak Harbor,Ohio RI VIA PC Dockets: 50-346 PWR/B&W-R-LP Subject: PART 21 NOTIFICATION - DAVIS-BESSE AFW TURBINE TRIP THROTTLE VALVE (UPDATE) Reportable Event Number: N/A Discussion: On 8/5/94, Dresser-Rand made notification per the requirements of Part 21.21 of a defect associated with supplied auxiliary feedwater (AFW) turbine trip throttle valves (TTVs). This defect was originally identified at Davis-Besse during AFW system Train 1 surveillance testing on June 1, 1994, and involved the identification that a setscrew used to anchor the valve stem coupling to the TTV stem was not completely engaged. Because of this, the stem had "slipped" several threads from its original coupled position. This resulted in the valve going only 72 percent open (versus the intended 100 percent) when the trip mechanism was reset and could have impacted the amount of steam available to the AFW Train 1 turbine. Train 1 was considered inoperable during the repair activities. Train 2 remained operable during this time. The available steam flow to the AFW Train 1 turbine with the TTV valve 72 percent open was not quantified. Licensee review determined the stem slippage had most likely occurred 6 days earlier during the last surveillance run of that train. The setscrew was retorqued to crush the stem threads at its holding point, and then was locktited in place. Followup discussion with the vendor (Dresser-Rand) revealed that the stem threads should have been machined flat/dimpled at the setscrew's point of contact to preclude any slippage. This information, however, had not been previously provided as part of the vendor's installation instructions. Subsequent inspection of the AFW Train 2 turbine TTV was performed which revealed that a dimple had been cut in the stem to retain the setscrew. No slippage of the Train 2 TTV stem was noted. Dresser-Rand plans to tag TTV stems in the future with instructions defining the proper procedures for securing the valve stem to the coupling. Davis-Besse plans to incorporate the vendor guidelines for the Train 1 TTV at the next scheduled Train outage. (Train 2 TTV currently meets the vendor guidelines.) Regional Action: The resident inspectors monitored the licensee's actions following identification of the problem. Root cause determination was discussed. The inspectors will observe/review the upcoming maintenance during the next AFW Train 1 outage. Contact: L.ROBERT GREGER (708)829-9628 S. STASEK (708)829-9631 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION IV AUGUST 11, 1994 Licensee/Facility: Notification: Nebraska Public Power District MR Number: 4-94-0078 Cooper 1 Date: 08/11/94 Brownsville,Nebraska SRI TELECON 08/08/94 Dockets: 50-298 BWR/GE-4 Subject: SYSTEM VALVE LINEUPS Reportable Event Number: N/A Discussion: Update to Morning Report No. 4-94-0076, dated August 8, 1994. An NRC inspector onsite conducting an independent review of this issue identified an additional mispositioned valve by comparing the P&ID with valve check lists. In addition, the NRC inspector completed a core spray system walkdown and identified two installed vent valves not shown on the P&ID drawings. The licensee is currently conducting an instrument air system walkdown. Final results of those walkdowns are not available at this time; however, one valve has been found mispositioned. Additionally, the licensee identified 22 valves added or deleted by design changes; however, valve lineup checklists were never revised. Electrical breaker lineup verifications were found to be correct. The licensee has not verified P&IDs to actual as-built configuration, while at the same time acknowledging that the valve lineup checklists used to perform system valve lineups are not accurate. Statements by various licensee personnel indicated that P&IDs were not necessary to be taken into the field since the site had recently completed an "as-built/design verification process." This program was initiated in 1986 and was completed in December of 1993. A large number of discrepancies were identified of which 2500 items potentially could impact plant operations. The licensee has not tracked these items and does not know how many are still open. Regional management will address this restart issue with utility management during exit meetings scheduled for tomorrow at the site. Regional Action: The resident inspectors will perform routine followup. Contact: R. Kopriva (402)825-3371 P. Harrell (402)825-3371