ML020380004
| ML020380004 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/12/2002 |
| From: | Sands S NRC/NRR/DLPM/LPD3 |
| To: | Bergendahl H FirstEnergy Nuclear Operating Co |
| Sands, S, NRR/DLPM/PD3-2, 415-3154 | |
| References | |
| Download: ML020380004 (6) | |
Text
February 12, 2002 Mr. Howard Bergendahl Vice President-Nuclear, Davis-Besse FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station 5501 North State Route 2 Oak Harbor, OH 43449-9760
SUBJECT:
DAVIS-BESSE NUCLEAR POWER STATION (DBNPS), UNIT 1 - UPCOMING STEAM GENERATOR TUBE INSERVICE INSPECTION
Dear Mr. Bergendahl:
Inservice inspections of steam generator (SG) tubes play a vital role in assuring that adequate structural integrity of the tubes is maintained. As required by the plant technical specifications, reporting requirements range from submitting a special report within 15 days following completion of each inservice inspection of SG tubes that identifies the number of tubes plugged and/or repaired; to submitting a special report within 12 months following completion of the inspection that provides complete results of the SG tube inservice inspection. The special report containing the complete results shall include the following:
1.
Number and extent of tubes inspected.
2.
Location and percent of wall-thickness penetration for each indication of an imperfection.
3.
Identification of tubes plugged and/or repaired.
A phone conference has been arranged with members of your staff to discuss the ongoing results of the SG tube inspections to be conducted during the upcoming DBNPS refueling outage. This phone call will occur after the majority of the tubes have been inspected, but before the SG inspection activities have been completed. Enclosed is a list of discussion points to facilitate this phone conference.
Mr. H. Bergendahl In response to a recommendation made in the Nuclear Regulatory Commissions Indian Point 2 Lessons Learned Task Group report, the staff plans to document a brief summary of the conference call as well as any material that you may have provided to the staff in support of the call.
Sincerely,
/RA/
Stephen P. Sands, Project Manager, Section 2 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 346
Enclosure:
List of Discussion Points cc w/encl: See next page
- See Previous Concurrence Sheet OFFICE PM:LPD3-2 LA:LPD3-2 EMCB*
SC:LPD3-2 NAME SSands THarris KKarwoski for LLund AMendiola DATE 02/12/02 02/12/02 02/08/02 02/12/02
Mr. Howard Bergendahl Davis-Besse Nuclear Power Station, Unit 1 FirstEnergy Nuclear Operating Company cc:
Mary E. OReilly Dennis Clum FirstEnergy Radiological Assistance Section Supervisor 76 South Main Street Bureau of Radiation Protection Akron, OH 44308 Ohio Department of Health P.O. Box 118 Manager - Regulatory Affairs Columbus, OH 43266-0118 FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station Carol OClaire, Chief, Radiological Branch 5501 North State - Route 2 Ohio Emergency Management Agency Oak Harbor, OH 43449-9760 2855 West Dublin Granville Road Columbus, OH 43235-2206 Director Ohio Environmental Protection Agency Ohio Department of Commerce DERR--Compliance Unit Division of Industrial Compliance ATTN: Zack A. Clayton Bureau of Operations & Maintenance P.O. Box 1049 6606 Tussing Road Columbus, OH 43266-0149 P.O. Box 4009 Reynoldsburg, OH 43068-9009 Public Utilities Commission of Ohio Transportation Department Regional Administrator 180 East Broad Street U.S. Nuclear Regulatory Commission Columbus, OH 43215-3793 801 Warrenville Road Lisle, IL 60523-4351 Attorney General Department of Attorney Michael A. Schoppman 30 East Broad Street Framatome ANP Columbus, OH 43216 1911 N. Ft. Myer Drive Rosslyn, VA 22209 President, Board of County Resident Inspector Commissioners of Ottawa County U.S. Nuclear Regulatory Commission Port Clinton, OH 43252 5503 North State Route 2 Oak Harbor, OH 43449-9760 Plant Manager, Randel J. Fast FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station 5501 North State - Route 2 Oak Harbor, OH 43449-9760
ENCLOSURE STEAM GENERATOR TUBE INSPECTION DISCUSSION POINTS PREPARED BY THE OFFICE OF NUCLEAR REACTOR REGULATION FIRSTENERGY NUCLEAR OPERATING COMPANY DAVIS-BESSE NUCLEAR POWER STATION, UNIT 1 DOCKET NO. 50-346 The following discussion points have been prepared to facilitate the phone conference arranged with the Davis-Besse Nuclear Power Station (DBNPS) to discuss the results of the steam generator (SG) tube inspections to be conducted during the upcoming DBNPS, Unit 1 refueling outage. This phone call is scheduled to occur towards the end of the planned SG tube inspection interval, but before the unit exits its refueling outage.
It is the staffs expectation that any significant results or relevant trends discussed during the phone conference, as well as any materials provided by your staff to assist us during the phone conference in the understanding of the SG tube results, will be included in one of the special reports required by the plant Technical Specifications.
1.
Discuss whether any primary to secondary leakage existed in this unit prior to shutdown.
2.
Discuss the results of secondary side hydrostatic tests.
3.
For each steam generator, provide a general description of areas examined, including the expansion criteria utilized and type of probe used in each area.
4.
For analyzed eddy current results, describe bobbin indications (those not examined with rotating pancake coil (RPC)) and RPC/Plus Point/Cecco indications. Include the following information in the discussion: location, number, degradation mode, disposition, and voltages/depths/lengths of significant indications.
5.
Describe repair/plugging plans for the SG tubes that meet the repair/plugging criteria.
6.
Discuss the previous history of SG tube inspection results, including any "look backs" performed.
7.
Discuss, in general, the new inspection findings.
8.
Describe in-situ pressure test plans and results, if applicable and available, including tube selection criteria.
9.
Describe tube pull plans and preliminary results, if applicable and available; include tube selection criteria.
10.
Discuss the assessment of tube integrity for the previous operating cycle.
11.
Discuss the assessment of tube integrity for next operating cycle.
12.
Provide the schedule for steam generator-related activities during the remainder of the current outage.
13.
Discuss what steps have been taken, or will be taken, in response to the lessons learned from the Indian Point Unit 2 tube failure. In addition, please be prepared to discuss the following:
a) the actions taken in response to identifying a new degradation mechanism b) the actions taken to ensure that data noise levels are acceptable c) the data quality issues and the need for criteria to address data quality.
14.
Discuss what actions, if any, are being taken in response to the TMI-1 event reported in NRC Information Notice 2002-02.