ML19322B572
| ML19322B572 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 07/18/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 7912040599 | |
| Download: ML19322B572 (1) | |
Text
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.$o UNITED STATES j
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WASHINGTON, D. C. 20555
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July 18, 1979
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Dockets Nos. 50-269 50-270 and 50-287 Mr. William 0. Parker, Jr.
Vice President - Steam Production Duke Power Company P. O. Box 2178 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Farker:
We have reviewed your response to our letter dated February 2,1978, in regard to the potential for the reactor cavity annulus seal ring to become a destructive missile in the event of a 1oss-of-coolant accident pipe break inside the reactor cavity.
In your response, you indicated that the seal ring is in a raised position and does not fom a seal between the vessel and the cavity during reactor operation. One licensee has infomed NRC that for their seal ring the raised position does not eliminate the possibility that the seal ring could become a missile following a postulated reactor coolant pipe rupture inside the reactor vessel cavity. Therefore, pursuant to.0 CFR 50.54 (f) of the Commission's regulations you are requested to (a) demonstrate by appropriate analysis that the seal ring cannot become a destructive missile during continued long-tem operation and that it poses no threat to the health and safety of the public; or (b) furnish a statement that the seal ring will be removed by no later than the next refueling outage.
Please respond within 60 days of your receipt of this letter.
Si ncerely, Y Y-
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Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors cc:
See next page Y912040 h /