ML20206C112
| ML20206C112 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 11/10/1988 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-79-02, IEB-79-14, IEB-79-2, NUDOCS 8811160108 | |
| Download: ML20206C112 (3) | |
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 SN 157B Lookout Place NOV 101988 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.
20555 Centlemen:
In the Matter of
)
Docket No. 50-260 Tennessee Valloy Authority
)
BROWHS FERRY NUCLEAR PLANT (BFW) - UNIT 2 - 0FFICE OF INSPECTION AND ENFORCEMENT BULLETIN (IEB) 19-14 AND 79-02 (79-14/02) PROGRAMMATIC MILESTONES AND SCHEDULE COMMITMENTS References TVA's letter dated September 28, 1988, "BFN Solsmle Amp 1Lfled Responso Spectra and IEB 79-14 and 79-02 Pipo and Pipo Supports Selsmic calculation Mothods"
_ PURPOSE The purpoco of this submittal is to transmit the BFN unit 2, 79-14/02 programmatic milestones and scheduto commitments. Various mootings betwoon TVA and the NRC have been hold over the past two years to address different aspects of the overall BFN unit. 2, 79-14/02 program. This submittal servos to summarize, confirm, and update infotvation previously provided to the NRC.
BACKCROUND TVA and NRC have ret on nevocal occasions to discuss IRB 79-14 and 19-02 Irsuen related to BFN.
The most recent meeting was hold on September 8 and 9, 1988, where engin scring methodologlos woro finalized. The reforanco lettor documented the conclusions reached at the September mooting, and comitted TVA to this follow-up subnittal on program milestones and schodulos.
Current Status The current BFN unit 2, 79-14/02 program plan romains essentially unchanged from that presented during earlier meetings, with tt, exception of adjustments to the implementation schedulo resulting from agreements reached on September 8 and 9, 1908.
The piping system reanalysos will be performed in two parts.
Part ono consists of a production affort to complete all 79-14/02 reconcillation work fer the total program scopo of approximately 220 stress prohtoms. This effort will be approximately 35 percent comploto before unit 2 restart.
As-built walkdowns for the approximately 220 stress problems will bo completed before restart.
466 8011160108 801110 PDR ADOCK 05000260 5 \\
Q PDC An Equal Opportunity Employer
/
NOV 101988 U.S. Nuclear Regulatory Commission Part two consists of a generic implication evaluation (horizontal slice) based on attelbutes established from the results of the first 20 percent of the stress problens.
This generic implication evaluation will be applied to all stress problems not complete at the time of restart.
Any modification required aA a result of the generic evaluations to 93tisfy operability i
criteria will be made before restart.
Upon completion of the abovo work, the remaining part one 79-14/02 effort l
(approximately 65 percent) will continue untti completion. This effort is l
expected to be complete by the next refueling outage af ter unit 2 start up.
f Summary statements of commitments contained in this submittal are provided in i
enclosuro 1.
I If any questions exist or further information is requested, pleaso contact f
Patrick P. Carler at (205) 129-3566.
Very truly yours, TENNESSEE LLEY AUTHORITY R.
- ridley, nager Nuclear Licensing and Regulatory Affairs i
Enclosuro cc (Enclosure)
Ms. S. C. Dlack, Assistant Director for Projects TVA Projecto Divlslon U.S. Nuclear Regulatory Commission One White Filnt, North 11555 Rockvl110 Pike
(
Rockvillo, Maryland 20852 l
Hr. F. R. McCoy, Assistant DLeector for Inspection Programs l
TVA Projects Division U.S. Nuclear Regulatory Commisalon Region 11 101 Harletta Street, NW, culte 2900 Atlanta, Coorgia 30323 Browns Ferry Resident Inspector Browns Ferry Nuclear Plant Route 12. Box 637 Athens, Alabama 35611 L
e ENCLOSURE 1 o
IEB 79-14/02 PROGRAMMATIC ISSUES r
List of Commitments 1.
Complete the 19-14/02 reconciliation work for applicable piping and support systems, considering all required program attributes, by the end of the next refueling outage af ter unit 2 restart (unit 2 refueling cycle 7).
2.
At. the 20 percoat completion level of ttie 79-14/02 reconciliation work, identify st:2ric attelbutes to be used in the generic implication evaluation (horizontal slice).
3.
Before unit 2 restart, continue the part one 79-14/02 reconelliation effort to the 35 percent completion level.*
4.
Complete the generic implication evaluation for the remaining 65 percent of the 79-14/02 piping and support systems before unit 2 restart.
S.
Complete 100 percent 19-14/02 as-built walkdowns before restart.
6.
Before restart, complete the modifications required to satisfy operability criteria identified from activities 2, 3, and 4 above.
i I
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- Previoucly 50 percent av indicated in Summary of Heating with TVA on Browns Ferry Unit 2 Restart Issues, March 17, 1988.
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