ML19210C553
| ML19210C553 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 10/30/1979 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911190083 | |
| Download: ML19210C553 (3) | |
Text
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- OCT 3 01979 MEMORANDUM FOR:
T. Ippolito Operating Reactors Branch #3 Division of Operating Reactors FROM:
G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - CONTAINMENT PURGE SYSTEM - VERMONT YANKEE NUCLEAR POWER PLANT (TAC 08297)
REFERENCE:
1.
Letter to T. Ippolito from D. Vandenburgh,
" Containment Purging During Nomal Plant Operations," dated January 9,1979 Plant Name: Vermont Yankee Nuclear Power Plant Docket No. : 50-271 Project '4anager:
V. Rooney Review Status: Awaiting Information With regard to the containment purge and vent system at Vemont Yankee Nuclear Power Plant, the licensee plans to justify unlimited purging (Reference 1). The Plant Systems Branch, Section B, after having reviewed the documents (Reference 1) filed by the licensee, has prepapred the enclosed request for additional information. Section A is continuing their review and will provide questions regarding the electrical and instrumentation aspects of containment purge in January 1980.
G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
Enclosure:
As stated
Contact:
}7r4 191 J. Kerrigan, X28129
'JJ1 iL' cc: See next page 7911190 Ob o V
T. Ippolito 007 3 0 mg cc w/ enclosure:
D. Eisenhut B. Grimes W. Gamill L. Nichols G. Lainas E. Reeves E. Adensam V. Rooney D. Tondi D. Shum J. Kerrigan J. T. Beard G. Knighton V. Noonan F. Witt J. Zudans R. Scholl 1354 122
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION FOR CONTAINMENT PURGE SYSTEM AND CONTAINMENT VENTING SYSTEM FOR VERMONT YANKEE NUCLEAR POWER PLANT DOCKET NO. 50-271 1.
With regard to the containment purge and venting system, provide the following infonnation:
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.
Quantify the amount of containment atmosphere released through the purge and vent isolation "alves for a spectrum of break sizes during the maximum closce 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 ductwork, 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 differ-ential pressure across the valve for which the maximum leak rate occurs.
Further, provide test msults (e.g., from vendor tests of leakage rate versus valve differential pressure) which support the above information.
1354 123
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