ML20206D328
| ML20206D328 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/09/1988 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| Shared Package | |
| ML20206D332 | List: |
| References | |
| NUDOCS 8811170046 | |
| Download: ML20206D328 (3) | |
Text
?
TENNESSEE VALLEY AUTHORITY CHATTANOOO A. TENNESSEE 37401 SN 157B Lookout Place NOV 091988 U.S. Nuclear Regulatory Comission ATTN: Document Control Oesk Hashington 0.C.
20555 Gentlemen:
In the Hatter of
)
DocLet No. 50-328 Tennessee Valley Authority
)
SEQUOYAH NUCLEAR PLANT (SON) - AUGHENTED AND M CELERATED IN-SERVICE INSPECTION PROGRAM FOR UNIT 2
References:
1.
TVA letter to NRC dated January 30, 1987, "Draft Copy of the NRC Safety Evaluation on Welding for Sequoyah Units 1 and 2" 2.
NRC Safety Evaluation Report on Tennessee Valley Authority: Sequoyah Nuclear Performance Plan, dated May 1988 Enclosed is TVA's revised in-service inspection (ISI) program (surveillance instruction 114.2, revision 13) for SQN unit 2.
This revision incorporates the augmented and accelerated fleid weld program into TVA's ISI program for unit 2.
TVA, by reference 1, comitted to revise SQN's American Society of Mechanical Engineers (ASHE) Code, section XI ISI program to include the following features.
The 4 items below are quoted directly froct TVA's January 30, 1987 letter.
1.
100 percent of the ASHE Class 1 and 2 piping field welds identified to be esamined in the first 10-year in-service interval and which remain to ce tuAmin6d Will be scheduled for examinatin (sic] the nest two consecutive refueling cutages following the submittal of the revised plan and the restart of any unit.
2.
100 percent of the ASME Class I and 2 pipe support field welds identified to be examineo in the first 10-year in-service interval and which remain to be esamined will be scheduled for examination in the esnt two consecutive refueling outages following the submittal of the revised plan and the restart of any unit.
3.
Major cceponent support melds made in the field on the reactor vessel, steam generator, pressurizer, and reactor coolant pumps that have been identified to be examined in the first 10-year program and which remain to be examined will be scheduled for esamination in the next two consecutive refueling outages folicwing the submittal (T the t
revised progran and tiie restart of any unit.
O ADOCK0500g?,f 89110 l
\\
scss$70046
'e FDR An Ecd opportunity Errvoy er
-2 NOV 091988 U.S. Nuclear Regulatory Comission 4.
Where possible, the program period examination percentages will be maintained as required by the code in the Tables IWB-2412-1 and IwC-2412-1 (Inspection Program B).
Note that the required percentages may not be met on specific systemt, categories, or item Nos. because certain systems contain a large number of socket welds which are fleid welds and the majority of pipe support welds are field welds.
Where conflicts with the code enam percentaje requirements and the augmented / accelerated programs are identified specifir, requests for relief will be added M the revised program.
These program elementt were paraphrased by NRC oa page 3-49 of NRC's May 1988 safety evaluation report (SER) on SON's Nuclear Performance Plan.
Because of phraseology differences between the SER and TVA's January 30, 1987 response, each of the four elements of the program has been restated from TVA's January 1987 response.
Thi5 waf done to maintain the original level of detail and to avoid any misinterpretatir,n regarding the identiflCatton of the welds requiring examination under this accelerated program.
In addition to the accelerated field welo program. TVA has incorporated new drawings, new weld counting, and NRC Bulletin 88-09 inspection requirements for the thimble tube guides on unit 2.
In keeping with TVA's previous commitment, we plan to submit the accelerated field weld program for SQN unit I sin months after unit I restart.
Please direct questions concerning this issue to 0. V. Goodin at (615) 870-7734.
Very truly yours.
TENNESS,EF VMLiiY AUTHORITY
/
/
l R. Gridley, anager Nuclear Licensing and Regulatory Affairs Enclosure cc:
See page 3 U.S. Nuclear Regulatory Comission NOV 091988 cc (Enclosure):
Hs. S. C. Black Assistant Otrector for Projects TVA Projects Division U.S. Nuclear Regulatory Comission One White Flint, North 11555 Rockville P1ki Rock:ttle, Maryland 20852 Mr. F. R. McCoy, Assistant Director for Inspection Programs TVA Projects Olvtston U.S. Nuclear Regulatory Comission Region 11 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Sequoyah Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379
\\
.