ML19208D683
| ML19208D683 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/11/1979 |
| From: | Verrelli D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7909290311 | |
| Download: ML19208D683 (4) | |
Text
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S UNITED STATES o
y" NUCLEAR REGULATOrtY COMMISSION WASHINGTON, D. C. 20555
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SEPTEMBER 1 1 1979 Docket Nos. 50-277 and 50-278 LICENSEE: Philadelphia Electric Company FACILITY: Peach Bottom Atomic Power Station, Units 2 and 3
SUBJECT:
MEETING
SUMMARY
- PEACH BOTTOM CONTAINMENT PURGE / VENT VALVES On August 24, 1979 members of the Staff met with representatives of Philadelphia Electric Company in Bethesda, Maryland. The meeting was held for the purpose of informing the staff of any unique design features and operating requirements for the Peach Bottom Unit 2 and 3 purge and vent valves. A copy of the agenoa and a list of attendees are attached.
The licensee provided information on the design arrangement and manu-facturer data for the purge and vent valve assemblies. Based on informa-tion provided to the licensee by the manufacturer, PECo has closed these valves and their use is restrictea uy F iant Management.
During power operation drywell venting is accomplisheo either through the one inch vent valves or by " batching" through the 18-inch valves (such that at no time are both 18-inch valves open). The principle use of the 18-inch valves is for inerting and deinerting the containment.
In this situation, cpening of the salves is restricted to 37 degrees open to assure that they will close against post-LOCA pressures in less than 5 seconds. This restriction on opening is accomplished by an adjustment of the control system. The operational implications of this restriction are that the time for inerting/deinerting has been increased by a factor of 3.
The licensee discussed the electrical control, actuation and bypass capability. He demonstrated with electrical schematics that ' solation signals to the 18-inch valves cannet be manually overridden. The capability exists to override the '3alation signal to the one-inch vent valves for purpose of post-accident hydrogen control.
The staff indicated that action on the PECo amendment request (dated July 31, 1979) in response to the DOR letter (dated November 29,1978) will be delayed pending the development of s aff re irements for valve operabili ty.
W W-s Davi M. Verr li, Project Manager Oper ting Re tors Branch #3 Divi ion of perating Reactors
Enclosures:
1.
Agenda 1056 036 2.
List of Participants 7 9 0929 0 3 / /
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'o UNITEO STATES JV NUCLEAR REGULATORY COMMISslON f-I1 WASHINGTON, D. C. 20555 Y
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Docket File V. Noonan NRC PDR G. Knighton Local PDR D. Ziemann ORB #3 Rdg P. Check NRR Rdg G. Lainas H. Canton D. Davis E. Case F. Pagano D. Eisenhut-R. Clark B. Gr' nes OELD W. Ga. nill 01&E (3)
R. Vollmer S. Sheppard L. Shao Project Manager J. Miller ACRS (16)
NRC Participants T. Ippolito
_M ERA w R. Reid
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A. Schwencer J. R. Buchanan 1056 037
Mr. Edward G. Bauer, Jr.
Ph ladelphia E'e-Company 2_
cc:
Eugene J. Bradley Mr. Edward G. Bauer, Jr.
Philadelphia Electric Company Vice President and General Counsel Assistant General Counsel Philadelphia Electric Company 2301 Market Street 2301 Market Street Philadelphia, Fannsylvania 19101 Philadelphia, Pennsylvania 19101 Troy B. Conner, Jr.
1747 Pennsylvania Avenue, N. W.
Washington, D. C.
20006 Raymond L. Hovis, Esquire 35 South Duke Street York, Pennsylvania 17401 Warren K. Rich, Esquire Assistant Attorney General Department of Natural Resources Annapolis, Maryland 21401 Government Publications Section State Library of Pennsylvania Education Building Commonwealth and Walnut Streets Harrisburg, Pennsylvania 17126 M. J. Cooney, Superintendent Generation Division - Nuclear Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 19101 Edward Greenman U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Peach Bottom Atomic Power 5tation P. O. Box 399 Delta, Pennsylvania 17314 Philadelphia Electric Company ATTN:
Mr. W. T. Ullrich Peach Bottom Atomic Power Station Delta, Pernsylvania 17314 i
1056 033
MEETING AGENDA FOR AUGUST 24, 1979 PECo/NRC PEACH BOTTOM CONTAINMENT VENT / PURGE VALVES I.
Valve Design Arrangercent II.
Prc:urement Specs / Qualification Data III.
Operating Requirements for Purging / Venting IV.
Electrical Schematics (1) Control Circuitry (2) ESF Actuation Circuitry - bypass capability V.
Valve Operability VI, PECc T. S. Submittal VII. Summary 1056 039
NRC/PECo MEETING August 24, 1979
" PEACH BOTTOM PURGE / VENT VALVE _S" PECo G. Edwards D. R. Helwig R. H. Logue W. M. Alden J. F. Winzenried S. R. Roberts L. A. Silva BNL T. Restivo EG&G D. B. Hackett J. H. Cooper NRC D. Verrelli E. Reeves E. G. Greenman (Reg. 1)
K. R. Wichman L. Nichols J. Kerrigan E. G. Adencam F. J. Witt W. I. Pasedag J. T. Beard T
A. Ippolito 2
1056 040