ML19210C632
| ML19210C632 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 11/02/1979 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911190262 | |
| Download: ML19210C632 (3) | |
Text
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NOV 2 1979 V
MEMORANDUM FOR:
T. Ippolito, Chief Operating Reactors Branch 13 Division of Operating Reactors FROM:
G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - CONTAINMENT PURGE SYSTEM - PILGRIM NUCLEAR POWER STATION, UNIT 1 (TAC 10174)
REFERENCES:
1.
Letter to T. Ippolito from G. Andognini,
" Containment Purging During Normal Plant Operation," dated September 19, 1979 2.
Letter to T. Ippolito from G. Andognini,
" Containment Purging During Nomal Plant Operation," dated August 21, 1979 Plant Name: Pilgrim Nuclear Power Station, Unit 1 Docket No.: 50-293 Project Manager:
J. Hannon Review Status: Awaiting Information With regard to the containment purge and vent system at Pilgrim Nuclear Power Station, Unit 1, the licensee has committed to limit purging of the containment during pcwer operation to 90 hours0.00104 days <br />0.025 hours <br />1.488095e-4 weeks <br />3.4245e-5 months <br /> per year (Reference 2). Tne Plant Systems Branch, Section B, after having reviewed the documents (References 1 and 2) filed by the licensee, has prepared the enclosed request for additional information.
Section A is continuing their review and will provide questions regarding the electrical and instrumentation aspects of containrcent purging in December 1979.
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G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
Enclosure:
As stated 1355 358 Q
7911190 1 6 2 h
A b
T. Ippolito NOV 2 1979 Contacts:
J. Kerrigan, X28129 D. Shum, X27058 cc w/ enclosure:
D. Eisenhut B. Grimes W. Gamill L. Nichols G. Lainas E. Reeves E. Adensam J. Hannon D. Tondi D. Shum J. Kerrigan J. T. Beard G. Knighton V. Noonan F. Witt J. Zudans R. Scholl 135] SS9
EtiCLOSURE m
REQUEST FOR ADDITIONAL INFORMATION FOR CONTAINMENT PURGE SYSTEM AND CONTAINMENT VENTING SYSTEM FOR PILGRIM NUCLEAR POWER STATION, UNIT 1 DOCKET NO. 50-293 1.
With regard to the containment purge system (18" and 20" lines),
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.
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.
c.
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.
1355 360