ML19257A024
| ML19257A024 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 12/04/1979 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Barton A ALABAMA POWER CO. |
| References | |
| NUDOCS 7912310505 | |
| Download: ML19257A024 (3) | |
Text
% Elk
.a.
ansa,
ss u
,(g 0,,
UNITED STATES y
y > ( ', g NUCLEAR RF.GULATORY COMMISSION 3 **
.. E WASHINGTo N, D. C. 20555 g, b d'
December 4,1979 I
l Docket No. 50-348 Mr. Alan R. Barton Senior Vice President Alabama Power Company Post Office Box 2641 Birmingham, Alabama 35291 l
Dear Mr. Barton:
As we advised you in our October 23, 1979 letter relating to containment i
purge and vent valve use at the Farley Nuclear Plant, our review of the long term issue is continuing.
In order that our review of your long term proposals continue, you are requested to provide the additional infor-mation shown in the enclosure.
Please provide the requested information within 45 days of receipt of this letter.
Sincerely,,
j I
h WYY l
A. Schwencer, Chief Operating Reactors Branch #1 Division of Operating Reactors
Enclosure:
Request for Information cc: w/ enclosure See next page 1654 207 7912810 TOC h
Mr. Alan R. Barton Alabama Power Company December 4,1979 cc: Ruble A. Thomas, Vice President Southern Services, Inc.
Post Office Box 2625 Bimingham, Alabama 35202 George F. Trowbridge, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.
Washington, D. C.
20036 John Bingham, Esquire Balch, Bingham, Baker, Hawthorne, Williams and Ward 600 North 18th Street Bimingham, Alabama 35202 Edward H. Keiler, Esquire Keiler and Buckley 9047 Jefferson Highway River Ridge, Louisiana 70123 George S. Houston Memorial Library 212 W. Burdeshaw Street Dothan, Alabama 36303 1654 208
l REQUEST FOR ADDITIONAL INFORMATION FOR THE CONTAINMENT PURGE SYSTEM FOR JOSEPri M. FARLEY NUCLEAR PLANT, UNIT 1 DOCKET NO. 50-348 1.
Provide a commitment that the main purge system (48 inch lines) would only be used for the reactor operational modes of cold shutdown and refueling (modes 5 and 6).
2.
With regard to the containment mini-purge system:
I a.
In response to Branch Technical Position (BTP) item 5.b, regarding the protection of structures and safety-related equipment located beyond the purge system isolation valves, your submittal dated February 5,1979 stated that the radiological analysis was performed taking no credit for the purge filter. This response does not appear to fully address the concerns of BTP item 5.b.
Provide a list of all structures and safety-related equipment that muld be damaged or would suffer a loss of function from the environment created by the escaping air and steam.
- Discuss, in detail, the potential of the damaged structures to adversely affect safety-related equipment in the vicinity. Discuss the impact on safety due to the loss of function of safety-related equipment.
Discuss all post-accident functions that are impacted.
b.
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 our conclusion.
3.
With regard to ti e purge supply and exhaust duct covering (bird screen) discuss the design basis of the screen.
In particular:
a.
Discuss the design basis for the sizing of the screen mesh pattern; b.
Discuss the ability of the " bird screen" to withstand dynamic LOCA forces; c.
Discuss the provisions taken to assure that the screen has been prope-ly qualified (e.g., for seismic events); and d.
Describe the routine procedures (e.g., inspections, etc.)
that you use to assure that partial blockage of the screen by debris during normal operation does not affect the ability of the screen to remain in place and perform its function when subjected to LOCA forces.
1654 209