ML17298C089

Forwards Proposed Change to FSAR Figure 9.4-9, P&I Diagram: HVAC-Fuel Bldg. Quality Classification for Temp Elements for Charcoal Filters in Fuel Bldg Essential Air Handling Units Downgraded to non-Quality Class Q

ML17298C089
Person / Time
Site:	Palo Verde
Issue date:	04/26/1985
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Knighton G Office of Nuclear Reactor Regulation
References
ANPP-32503-EEVB, NUDOCS 8504300222
Download: ML17298C089 (10)

Text

REGULATOR "NFORMATION DISTRIBUTION S EM (RIDS)

ACCESSION NBR! 8504300222 DOC ~ DATE 85/04/26 NOTARIZED: YES DOCKET' FACIL:STN-50-528 Palo Verde Nuclear Stations Unit 1i Arizona Publ-i 05000528 STN 50 529 Palo Verde Nuclear Stations Unit 2i Ar,izona Publf 05000529 STN-50 530 Palo Verde Nuclear Station~ Uni,t 3i Arizona Publi 05000530 AUTH INANE AUTHOR AFFILIATION VAN BRUNT~E ~ E ~ Arizona Public Service Co ~

RECIP ~ NAME RECIPIENT AFFILIATION KNIGHTONg G+N ~ Licensing Branch 3

SUBJECT:

Forwar ds pr oposed change to FSAR Figur e 9.4"9r "P8I Diag'm:

HVAC-Fuel Bldg." Quality classification for temp elements for charcoal filters in fuel bldg essential air handling units downgraded to non-Qualfty Class Q.

DISTRIBUTION CODE: 8021D COPIES RECEIVED:LTR ENCL SI2Es"'":

TITLE: OR/Licensing Submittal: Combined Gener al Distribution NOTES:Standardized plant. 05000528 OL: 12/31/84 Standardized plant< 05000529 Standardized plant. 05000530 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL>

NRR LB3 BC 05 1 1 NRR LB3 LA 1 0 LICITRAt E 01 1 1 INTERNAL: ACRS 29 8 8 ADM/LFMB 1 0 ELD/HDS3 1 0 NRR/DE/CEB 09 1 1 NRR/DE/MTEB 1 1 NRR/DHFS DEPY12 1 1 NRR/DHFS/HFEB16 1 NRR/DHFS/LQB 1 1 NRR/DL DIR 1 0 NRR/DL/ORAB 1 0 NRR/DL/SSPB 1 0 NRR/DS I/ADRS 1 0, NRR/DSI/AEB 28 1 NRR/DS I/CP8 11 1 1~

NRR/DSI/CSB 10 1 NRR/DS I/I CSB 18 1.

NRR/DSI/METB 13 1 1 NRR DS I/PSB 21 1 1 NRR/DSI/RSB 25 1 1 REG 04 1 1 RGN5 1 1 RM/ MI/MIB 1 0:

EXTERNAL: LPDR 03 1 1 NRC PDR 1 1 NSIC 06 1 1 PNL GRUELzR 1 1 TOTAL NUMBER OF COPIES REQUIRED: LTTR 36 ENCL 28

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Arizona Nuclear Power Project P.o. BOX 52034 4 PHOENIX, ARIZONA85072-2034 Director of Nuclear Reactor Regulation ANPP-32503-EEVB/BJA Attention: Mr. George M. Knighton, Chief April 26, l985 Licensing Branch No. 3 0 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(License No. NPF-34)/529/530 License Condition 2.C.6(c) and 2.C.18(c)

File: 85-056-026 G.1.01.10

References:

(1) Letter from E. E. Van Brunt, Jr., ANPP, to G. M. Knighton, NRC, dated December 7, l984 (ANPP-31380);

Subject:

PVNGS Seismic Qualification Program.

(2) Letter from E. E. Van Brunt, Jr., ANPP, to G. t<. Knighton, NRC, dated December 7, l984 (ANPP-31379); PVNGS Environmental Qualification.

(3) NUREG-0857, Supplement No. 7 "Safety Evaluation Report Related to the Operation of Palo Verde Nuclear Generating Station, Units 1, 2, and 3", dated December, 1984.

Dear Mr. Knighton:

Attached is a proposed FSAR change for FSAR Figure 9.4-9. ANPP has re-evaluated the need to have Quality Class "Q" temperature elements for the charcoal filters of the fuel building essential air handling units. These temperature elements provide the operators with an indication of when the charcoal filters are approaching their desorption temperature for radioactive iodine. ANPP has previously determined that there are no ESF filter units .at PVNGS that will exceed 200'F following a postulated DBA as a result of a loss of air flow (refer to FSAR Section 1.8, Regulatory Guide 1.52, Position C.3.K). The concern of ANSI/ASME N509-1976 is that desorption of iodine may occur at elevated temperatures (e.g.,

)300'F). Therefore, the desorption teinperature will not be reached in the charcoal filters of the fuel building essential air handling units and there is no need to have temperature elements to monitor the charcoal bed temperature. For these reasons, the quality classifications for the four temperature elements have been downgraded from Quality Class "Q" to non-Quality Class "Q".

Reference (1) submitted a Justification for Interim Operation (JIO) for PVNGS Unit 1 in order to complete the seismic qualification of these four temperature elements which are located adjacent to the charcoal filters of the fuel building essential air handling units. Additionally, Reference (2) submitted a JIO in order to complete the environmental qualification of these same four temperature elements.

These JIO's are discussed in Sections 3.10 and 3.11 of Reference (3) and the staff has imposed License Condition 2.C.6(c) and 2.C.18(c) for the temperature elements to be seismically and environmentally qualified prior to PVNGS Unit 1 initial criticality. The JIO's of References (1) and (2) stated that the function of these temperature elements is to alert the control room operator of potential filter fires. This stated function was in error. The actual function of the temperature elements is to provide the operators with an indication of when the charcoal filters 8504300222 850426 PDR ADOCN 05000528 pswl r P . . . PDR I(I

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q. Mr. George W. Knighton License Condition 2.C.6(cond 2.C.18(c)

ANPP- 32503 Page 2 are approaching their desorption temperature for radioactive iodine. Since it has been determined that non-Quality Class "Q" equipment is acceptable for use in this application, the temperature elements have been removed from the scope of the Equipment Qualification Program. These temperature elements are considered to be fully qualified for their application at PVNGS.

If you have any questions on this matter, please contact W. F. Quinn of my staff.

Very truly yours, G. E E. E. Van Brunt, Jr.

Executive Vice President Project Director EEVB/BJA/mb Attachment cc: E. A. Licitra (All v/attachment)

H. Garg A. C. Gehr R. P. Zimmerman

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~p STATE OF ARIZONA )

) sse COUNTY OF MARICOPA)

I, Edwin E. Van Brunt, Jr., represent that I am Executive Vice President, Arizona Nuclear Power Progect, that the foregoing document has been signed by me on behalf of Arizona Public Service Company with full authority to do so, that I have read such document and know its contents, and that to the best of my knowledge and belief, the statements made therein are true.

Edwin E. Van Brunt, Jr.

Sworn to before me this cQ4 day of 1985. r r

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