ML19317E815
| ML19317E815 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 03/14/1975 |
| From: | Purple R Office of Nuclear Reactor Regulation |
| To: | Thies A DUKE POWER CO. |
| References | |
| NUDOCS 7912190832 | |
| Download: ML19317E815 (3) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION j
WASHINGTots, D.
C. 20555 PAR 141975 Docket Nos. 50 ?60 50-270 50-287 Duke Power Company ATIN:
Mr. Austin C. Thies Senior Vice President 422 South Church Street Post. Office Box 2178 Charlotte, North Carolina 28201 Gentlemen:
Although your emergency core cooling systems generally satisfy our requirements with regard to long-term cooling, the system configurations have not been specifically evaluated to show that significant changes in chemical concentrations would not occur during the long term after a loss-of-coolant accident (LOCA) and these potential changes have not been specifically addressed by appropriate operating procedures.
Accordingly, you should review your system capabilities and operating procedures to j
assure that boron precipitation would not compromise long-term core j
cooling capability following a LOCA. This review should consider all aspects of your design, including component qualification in the LOCA environment in addition to a detailed review of operating procedures.
You should examine the vulnerability of your design to single failures that would result in any significant boron precipitation.
You should submit this evaluation and associated operating procedures within 30 days of receipt of this letter. These procedures should be promptly effected to assure that boron precipitation would not interfere with the ability of your facility to conform. to Criterion (5) of 10 CFR
- 50. 46 (b).
h'e will inform you as to the acceptability of your evaluation and associated operating procedures.
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While solute concentrations may be subject to control through operating i
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procedures, equipment modifications may be required or desirable to l
simplify such procedures.
Your submittal should include a plan for completing such modifications within six months of the date of this letter.
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Duke Power Company 2-g4p 3 41975 1his request for generic information was approved by GAO under a blanket clearance number B-180225 (R0072); this clearance expires July 31, 1977.
Sincerely, Original s3gned by
- 11. A. Purple Robert A. Purple, Chief Operating Reactors Branch #1 Division of Reactor Licensing
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Duke Power Company -
M R 14 875 cc:
Mr. William L. Porter Duke Power Company P. O. Box 2178 422 South Church Street Charlotte, North Carolina 28201 Mr. Troy B. Conner Conner, Hadlock &.Knotts 1747 Pennsylvania Avenue, NW Washington, D. C.
20006 Oconee Public Library 201 South Spring Street Walhalla, South Carolina 29691 t
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