ML19254F627
| ML19254F627 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/05/1979 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911160103 | |
| Download: ML19254F627 (3) | |
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UNITED STATES 5'
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NOV 5 1979 MEMORANDUM FOR:
T. Ippolito, Chief, Operating Reactors Branch #3, D0R FROM:
G. Lainas, Chief, Plant Systems Branch, D0R
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION - CONTAINMENT PURGE SYSTEM - PEACH BOTTOM ATOMIC POWER STATION UNITS 2 AN,D 3 (TACS 10173 AND 10172)
REFERENCES:
1.
Letter to T. Ippolito from S. Daltroff dated January 2,1979.
2.
Letter to B. Grimes from M. Cooney,
" Licensee Event Report Narrative Descrip-tion", dated March 29, 1979.
3.
Letter to H. Denton from E. Bradley, dated July 31, 1979.
Plant Name:
Peach Bottom Atomic Power Station, Units 2 and 3 Docket Nos.:
50-277, 50-278 Project Manager:
D. Verrelli Review Status: Awaiting Infonnation With regard to the containment purge system and containment venting system at the Peach Bottom Atomic Power Station, Units 2 and 3, the licer.see has committed 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.
The Plant Systems Branch, Section B, after having reviewed the documents (References 1 through
- 3) filed by the licensee, has' identified several areas where additional information is necessary.
Therefore, we have prepared the enclosed request for additional information which should be transmitted to the licensee.
1347 141
/Ch 7911160 P
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. NOV 5 s/9 The PSB, Section A (El&C) is currently reviewing the licensee's information provided at their August 4, i979 meeting.
LW G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
Enclosure:
As stated
Contact:
D. Shum X-27058 cc w/ enclosure:
D. Eisenhut B. Grimes W. Gammill L. Nichols G. Lainas T. Ippolito D. Verrelli E. Adensam E. Reeves D. Tondi D. Shum J.T. Beard G. Knighton V. Noonan W. Pasedag4[ }42 P. Check R. Scholl
ENCLO"'JRE O REQUEST FOR ADDITIONAL INFORMATION FOR CONTAINMENT PURGE SYSTEM AND CONTAINMENT VENTING SYSTEM FOR FEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 DOCKET N05. 50-277 AND 50-278 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 potentially 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 valves against 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. Provide test results (e.g., from vendor tests of leakaoe rate versus valve differential pressure) which support your conclusion. 2. The proposed Technical Specifications for limiting condi'tions for operation should be changed to limit the use of the purge system to less than 90 hours per year while the plant is in the startup, power, hot standby and hot shutdown modes. l34[ l43 .}}