ML17276B585

Clarifies Diesel Generator Bldg Air Intake Per Discussion Re Design Basis Dust Storm Effect.Response Closes Out SER Outstanding Concern

ML17276B585
Person / Time
Site:	Columbia
Issue date:	08/05/1982
From:	Bouchey G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Schwencer A Office of Nuclear Reactor Regulation
References
GO2-82-641, NUDOCS 8208110101
Download: ML17276B585 (6)

Text

REGULAT INFORMATION DISTRIBUTION STEM (R IDS)

AGCBSSION NBR:8208110101 OOC ~ DATE: 82/08/05 NOTARIZED: NO DOCKET FACIL:50-397 BYNAME l4PPSS Nuclear Projects Unit 2q Washington iPublic Powe 05000397

'AUTH AUTHOR AFFILIATION BOUCHEY,G ~ DE Nashington Public Power Supply System

~RBC IP ~ NAME RECIPIENT AFFIL'IATION SCHNENCERiA, , Licensing Branch 2

SUBJECT:

Clarifies diesel generator bldg air intake per discussion re desi'gn basis dust storm .effect, Response closes out SER outstanding concern, O IS T R I8 UT IO N TITLE: PSAR/FSAR C 0OE ~ 8 0 0 1'S AMDTS and C0P IE S IR ECE I VE 0 Related Correspondence L' R f,E NC L l S IZE ~,

NOTES:

RECIPIENT COPIES RECIPIENT COP IFS IO CODE/NAME LTTR ENCL ID CODE/NAME LTiTR ENCL A/D LICENSNG 1 0 LIC BR P2 BC 1 0 LIC BR 02 LA 1 0 AULUCKgR ~ 01 1 1 INTERNAL: ELD/HDS2 1 0 IE F ILE 1 1 IE/DEP EPDS 35 1 1 IE/DEP/EPLB 36 3 3 NRR/DE/CEB 11 1 NRR/DE/EQB 13 3 3 NRR/OE/GB 28 2 2 NRR/DE/HGEB 30" 2 2 NRR/DE/MEB 18 1 1 NRR/DE/MTEB 17 1 1 NRR/OE/QAB 21 1 1 NRR/DE/SAB 24 1 NRR/DE/SEB 25 1 1 NRR/DHFS/HFEB40 1 1 NRR/OHFS/LQB 32. 1 1 NRR/DHFS/OLB 1 1 NRR/DHFS/PTRB20 1 1 NRR/OS I/AEB 26 1 1 NRR/DS I/AS 8 27 1 1 NRR/DSI/CPB 10 1 1 NRR/OS I/CSB 09 1 1 NRR/DS I/ETSB 12 1 1 NRR/DS I/IlCSB 16 1 1 NRR/DSI/PSB 19 1 1 NRR/OS I/RAB 22 1 1 NRR O RSB 23 1 1 NRR/DST/LGB 33 1 1 EG F 04 1 1 RGN5 2 2 / OAMI/MI 8 1 0 EXTERNAL; ACRS 41 16 16 BNL(AMDTS ONLY) 1 1 DMB/OSS (AMDTS) 1 1 FEMA RFP OIV 39 1 1 LPOR 03 1 1 NRC ~PDR 02 1 1 NS I'C 05 1 1 NTIS 1 1 TOTAL NUMBER OF COPIES REQUIRED: LTTR 64 ENCL .59

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Washington Public Power Supply System P.O. Box 968 3000 George Washington Way Richland, Washington 99352 (509) 372-5000 August 5, 1982 G02-82-641 Docket No. 50-397 Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

NUCLEAR PROJECT NO. 2 DESIGN BASIS DUST STORM EFFECT ON DIESEL GENERATOR BUILDING AIR INTAKE Discussions with Mr. R. Giardina of your PSB staff have indicated a need for clarification of the potential impact of a design basis dust storm on the Diesel Generator Building air intake. The air intake provides combustion air for the Diesel Generators, and outside air for the Diesel Generator Building HVAC system. There are louvers on the building air intake and a large area just inside the louvers where dust could conceivably collect.

The louvered opening is approximately 10 feet by 12 feet and its lowest portion is 2 feet above grade elevation. A 20-foot high wall inside of the louvers provides tornado missile protection, and forms a rectangular volume open at the top.

The Supply System evaluated the potential for dust accumulation in the volume behind the louvers, using the design basis dust loading given in Section 2.3.1 of the WNP-2 FSAR. The results showed that less than one

,cubic foot of dust would be drawn into the louvers by the building air flow. Even if the air flow through the louvers were increased somewhat by the winds associated with the design basis dust storm, dust could not be accumulated3in sufficient quantities to cause air flow problems.

Nore than 130 feet of dust would have to be accumulated before the dust level began to affect intake air flow.

8208110101 820805 PDR ADOCK 05000397 E PDP

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Mr. A. Schwencer Page Two August 5, 1982 G02-82-641 This clarification of the Diesel Generator Building air intake should close-out the'ER outstanding concern for this subject. If you need additional inforination, please feel free to-.contact Mr. R.M. Nelson, Manager, WNP-2Project Licensing.

Yery truly yours, G. D. Bouchey Deputy Director, Safety and Security DM/jca cc: R Auluck - NRC WS Chin - BPA R Feil - NRC Site R Giardina-NRC

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