ML15238B410
| ML15238B410 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 07/17/1981 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 8107310092 | |
| Download: ML15238B410 (3) | |
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L PDR PWagner EReeves ORB# Rd TERA JStolz DShum, CSB/DSI NSIC Rlngram LRubenstein, DSI INRC PDR DEisenhut OELD AEOD Dockets Nos. 50-269, 50-270 IE-3 and 50-287 ACRS-10 Gray File HOrnstein EBlackwood Mr. William 0. Parker, Jr.
Vice President -
Steam Production Duke Power Company P. 0. Box 33189 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Parker:
The staff has completed the review of information provided by Duke Power Company regarding containment purge/vent system design and operating practices. This review has concluded that, although there has been con siderable correspondence on this subject, no firm decision or adequate justification regarding purge system operation has been made. As stated in the NRC letter dated July 7, 1981_on purging and venting of contain ments, there still remains a number of outstanding items to be completed.
We, therefore, request that you provide an evaluation of the purge/vent system design and operating practices for the Oconee Nuclear Station Units which adequately addresses the issues of BTP CSB 6-4 (Revision 1).
Your letter dated April 15, 1980 stated that this information could be provided if the NRC would concur that such a response would be sufficient to allow purging system utilization during power operation. It is the NRC's position that, unless the purge and/or vent valves are fully quali fied, they should remain locked closed during all operations above the cold shutdown mode. In order for us to determine the acceptability of the purge/vent valves at the Oconee Nuclear Station, it is necessary that we review the evaluation of the issues addressed in the above BTP and the valve operability evaluation mentioned in our July 7, 1981 letter.
The staff recommends that Duke Power Company consider the advantages of reducing the size of the installed purging systems at the Oconee Units.
No Although the 48 inch system can purge the containment quickly, a smaller co system would be more desirable from valve operability and leak tightness considerations.
Even though annual system usage would be increased to o
compensate for the reduced size, the staff feels that the advantages of a smaller system would outweigh this disadvantage.
'00 In an effort to consolidate the review of this issue, we request that you I.
provide your combined response to this letter and our July 7, 1981 letter within 60 days of your receipt of this letter.
Wa0 0 AUG
Mr. William 0. Parker, Jr.
-2 As an alternative to providing an item by item evaluation of the issues in the BTP, a Technical Specification chane request requirin the 48 inch purge/vent valves to be locked 'clos en above the cold shudown mode and.also requiring their periodic leak testing wouIdresolve these staff concerns.
If you have any questions on this sub ect, please contact your NRC Project Manager.
Sincerely, PORIGINAL SIGNZI By JOHN F. STIOLTZ John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing cc:
See next page OFFICE)
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DATE 7/11/81 7
J 8 1 NRC FORM 318 110/80) NRCM 0240 OFFICIAL RECORD COPY USGPO 1980-329-824
Duke Power Company cc w/enclosure(s):
Mr. William L. Porter Duke Power Company P. 0. Box 33189 422 South Church Street Office of Intergovernmental Relations Charlotte, North Carolina 28242 116 West Jones Street Raleigh, North Carolina 27603 Oconee County Library 501 West Southbroad Street Walhalla, South Carolina 29691 Honorable James M. Phinney County Supervisor of Oconee County Walhalla, South Carolina 29621 U. S. Environmental Protection Agency Region IV Office ATTN: EIS COORDINATOR 345 Courtland Street, N.E.
Atlanta, Georgia 30308 Mr. Francis Jape U.S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, South Carolina 29678 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 J. Michael McGarry, III, Esq.
DeBevoise & Liberman 1200 17th Street, N.W.
Washington, D. C. 20036