ML19210C549
| ML19210C549 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/30/1979 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911190075 | |
| Download: ML19210C549 (3) | |
Text
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OCT 3 0 579 MEMORANDUM FOR:
R. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors FROM:
G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - CONTAINMENT PURGE SYSTEM - ARKANSAS NUCLEAR ONE - UNIT 1 (TAC 10212)
REFERENCES:
1.
Letter to R. Reid from D. Williams, " Containment Purging During Nomal Plant Operation," dated December 29, 1978 2.
Letter to R. Reid from D. Williams, " Containment Purging During Normal Plant Operation," dated January 30, 1979 3.
Letter to R. Reid from W. Cavanaugh, III,
" Reactor Building Purging During Operation,"
dated April 2,1979 4.
Letter to R. Reid from D. Trimble, " Reactor Building Purge Valves," dated August 22, 1979 Plant Name: Arkansas Nuclear One, Unit 1 Docket No. : 50-313 Project Manager:
G. Vissing Review Status: Awaiting Infomation With regard to the containment purge and vent system at Arkansas Nuclear One, Unit 1, the licensee has connitted to limit purging of the containment during power operation to 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> per year (Reference 3). The Plant Systems Branch, Section B, after having reviewed the documents (References 1 through 4) filed by the licensee, has prepared the enclosed request for additional info ma tion. Section A is continuing their review and may provide questions regarding the electrical instrumentation aspects of containment purging in January 1980.
G. Lainas, Chief Plant Systems Branch Division of Operating Reactors 1354 056 7 911190 ole
R. Reid OCT 3 0 879
Enclosure:
As stated Contacts:
J. Kerrigan, X28129 D. Shum, X27058 cc w/ enclosure:
D Eisenhut B. Jrimes W. Gamill L. Nichols G. Lainas E. Reeves E. Adensam G. Vissing D. Tondi D. Shum J. Kerrigan J. T. Beard G. Knighton V. Noonan F. Witt J. Zudans R. Scholl 1354 057
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION FOR CONTAINMENT PURGE SYSTEM AND CONTAINMENT VENTING SYSTEM FOR ARKANSAS NUCLEAR ONE, UNIT 1 DOCKET NO. 50-313 1.
With regard to the containment purge and venting system, provide the following infomation:
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.
Provide an analysis to demonstrate the acceptability of the provisions made to protect structures and safety-related equipment; e.g., fans, filters, and ductwork, located beyond the purge system isolation valve again~st loss of function from the environment created by the escaping air and steam.
d.
For the containment purge isolation valves, specify the differential pressure across the valve for which the maximum leak rate occurs.
Further, provide test resuits (e.g., from vendor tests of leakage rate versus valve differential pressure) which support the above data.
e.
Provide an analysis of the reduction in the containment pressure resulting from the partial loss of containment atmosphere during the accident for ECCS backpressure deter-mination.
2.
Provide a schematic drawing of your purge and vent system.
1354 058
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