ML17298B610
| ML17298B610 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/05/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| ANPP-31335-EEVB, NUDOCS 8412110309 | |
| Download: ML17298B610 (4) | |
Text
REGULAYO INFORMATION DISTRIBUTION STEM (RIDS)
ACCESSIOQ NBR;841 FACIL';STN. 50-,528 STN ~~~0 529 STN 50 530 AUTH',NAME>>,
VAN.BRUNTgE>>,E, REC IP ~ NAME>>
KNIGHTON G ~ W ~
2110309 DOC ~ DATE: 84/12'/05 NOTARIZEDt, NO Palo Verde Nuclear Stationi Unit ii Ar izona Publi Palo Verde Nuclear Statian~
Unit 2i Arjzona Publi
'Palo Verde Nuclear Stations Unit 3i Arizona Publi AUTHOR AFFILIATION Arizona<<Public,Service'o
~
RECIPIENT", AFFILIATION Licensing Br anch 3
DOCKET 05000528 05000529 05000530
SUBJECT:
Advises= that<<, to ensure>> adequate backup fire protection water
<<suppress)on capability~design wi)1 be'hanged to addvalve L
piping to isolate secondary suppression hose stations from primary suppression sys.Completion expected by 850401
'ISTRIBUTION CODE:
B002D COPIES RECEIVED:LTR
'NCL" SIZE:
TITLE: Licensing Submi ttal: Fir e'r otection NOTES:Standardized plant.
Standardized plant.
Standardized plant.
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Arizona Public Service Company ANPP-31335-EEVB/WFQ/DKN December 5, 1984 Director of Nuclear Reactor Regulation Attention: Mr. George W. Knighton, Chief Licensing Branch No.
3 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Units 1, 2 and 3
Docket Nos. STN-50-528/529/530 Fire Protection Modification and Compensatory Measures File:
84-056-026; G.1.01.10
Dear hlr. Knighton:
Appendix A to 10CFR50 requires the fire protection system to have adequate capacity and ca'pability.
Branch Technical Position APCSB 9.5-1 Appendix A, interprets this to mean that no single failure should disable the primary and secondary suppression system.
At the 120-and 140-foot elevations in the Auxiliary Building (Fire Zones
- 47B, 52D,
- 56B, 56C, 57I, and 57J), the primary and secondary systems are interconnected and the nearest non-inter-connected hose station is in excess of 150 feet away.
Accordingly, due to the long hose length necessary to provide backup suppression capability, the intent of the BTP is not met.
To ensure adequate backup fire protection water suppression capability, the PVNGS design will be changed to add a valve and piping that will isolate the secondary suppression hose stations from the primary suppression system at the 120-and 140-foot elevation.
In the interim, the fire detection system will be operational and whenever the primary suppression system is noi available, backup fire suppression water will be provided from the nearest active hose station in accordance with Technical Specification 3/4.7.11.4.
- Thus, even in the unlikely event of a piping fai lure and a fire, suppression capability would be. maintained by compensatory measures.
This desi.gn Change is expe'cted It'o, be;~completed by April 1, 1985.
Please contact William Quinn on my staff should you have questions regarding this request.
Very truly yours, 8412110309 841205 PDR ADOCK 05000528 F
PDR EEVBJr/DKN/no cc:
E.A. Licitra D.J. Kubicki P.
Quails A.C. Gehr R.P.
Zimmerman APS Vice President Nuclear Production ANPP Project Director
V-