ML19260C529
| ML19260C529 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 11/17/1979 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 8001070350 | |
| Download: ML19260C529 (3) | |
Text
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C WASHINGTON, D. C. 20555 November 17, 1979 Docket No. 50-298 Mr. J. M. Pilant, Director Licensing & Quality Assurance Nebraska Public Power District P. O. Box 499 Columbus, Nebra:ka 68601
Dear Mr. Pilant:
We are reviewing your submittal dated January 4, 1979 in response to our letter of Ncvember 29, 1978 concerning containrent purging. On September 12, 1979 we met with Nebraska Public Power District repre-sentatives in Bethesda and discussed that issue.
As a result of our review to date and our meeting, we have determined that the additional systems information requested in the enclosure is necessary in order to complete our long term containment purge and venting system safety evaluation. Please provide answers to these questions within 45 days of receipt of this letter.
We have not yet completed our review of the mechanical, electrical and instrumentation aspects of containment purge, but expect that we may have additional questions for you in these areas.
Sincerely, 4%.
Thomas Ippolito, Chief Operating Reactors Branch #3 Division of Operating Reactors
Enclosure:
Request for Additional Information cc w/ enclosure:
1694 266 800107o 35 0
Mr. J. M. Pilant Nebraska Public Power District
-2 cc:
Mr. G. D. Watson, General Counsel Nebraska Public Power District P. O. Box 499 Columbus, Nebrasks 68601 Mr. Arthur C. Gehr, Attorney Snell & Wilmer 3100 Valley Center Phoenix, Arizona 85073
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Cooper Nuclear Station ATTN: Mr. L. Lessor Station Superintendent P. O. Box 98 Brownville, Nebraska 68321 Auburn Public Library 118 - 15th Street Auburn, Nebraska 68305 1694 267
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ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION FOR CONTAINMENT PURGE SYSTEM AND CONTAINMENT VENTING SYSTEM FOR COOPER NUCLEAR STATION 00CXET NO. 50-298 1.
With regard to the containment purge and venting system, provide the following information:
a.
Discuss the provisions made to ensure that isolation valve' closure will not be prevented by debris which.could poten-tially become entrained in the escaping air and steam.
b.
Discuss the provisions made for testing the availability of the isolation function and the leakage rate of_ the isolation valves, individually, during reactor operation, c.
Specify the amount of containment atmosphere released through the purge and vent isolation valves for a spectrum break sizes during the maximum closure time allowed in your Technical Specifications.
d.
Provide an analysis to demonstrate the acceptability of the provisions made to protect structures and safety-related equipment; e.g., fans, filters, and cuctwork, located beyond the purge system isolation valves against loss of function from the environment created by the escaping air and steam, e.
For the containment purge isolation valves, specify the differential pressure across the valve for which the maximum leak rate occurs.
Provide test results (e.g.,
from vendor tests of leakage rate versus valve differential pressure) which support your conclusion.
1694 268
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