ML17300B350

Forwards Revised Bases Pages,Providing Addl Discussion of Options Available to Exit Required Action G of TS 3.8.1 & Revised Page for TS 3.3.7,in Response to NRC RAI Re Proposed Amend to TS 3.8.1 & 3.3.7

ML17300B350
Person / Time
Site:	Palo Verde
Issue date:	09/29/1999
From:	Ide W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17300B351	List: ML17300B350 ML17300B352
References
102-04353-WEI-S, NUDOCS 9910050108
Download: ML17300B350 (7)

Text

CATEGORY 1 REGULATORY INFORMATION DISTRIBUTIO SYSTEM (RIDS)

ACCESSION NBR:9910050108 DOC.DATE: 99/09/29 NOTARIZED: YES DOCKET FACIL!QTN~50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528

'~ S&i4.-.50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH.NAQE AUTHOR AFFILIATION IDE,W.E.

Arizona Public Service Co.

(formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Records Management Branch (Document Control Desk)

SUBJECT:

Forwards revised Bases pages, providing addi discussion of options available to exit required action G of TS 3.8.1 revised page for TS 3.3.7,in response to NRC RAI re proposed amend to TS 3.8 1

& 3.3.7.

DISTRIBUTION CODE! AOOID COPIES RECEIVED:LTR )

ENCL i SIZE: 34.L TITLE: OR Submittal:

General Distribution E

NOTES: STANDARDIZED PLANT Standardized plant.

Standardized plant.

G 05000528 05000529 0 05000530 R

RECIPIENT ID CODE/NAME JAMERSON,C SC COPIES LTTR ENCL 1

1 1

1 RECIPIENT ID CODE/NAME KALYANAM,N COPIES LTTR ENCL 1

1 INTERNAL: ACRS NRR/DSSA/SPLB NUDOCS-ABSTRACT 1

1 1

1 1

1 FILE CENTER 01

~ 1 1

~RX 1

1 OGC/RP 1

0 D

EXTERNAL: NOAC NRC PDR 1

1 g(Emu'<83 NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEZVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD)

ON EXTENSION 415-2083 TOTAL NUMBER OF. COPIES REQUIRED:

LTTR 11 ENCL 10

Palo Verde Nuclear Generating Station William E. Ide Vice President Nuclear Production Mail Station 7602 TEL (623) 393-6116

'.O. Box 52034 FAX (623) 3934077 Phoenix, AZ 65072-2034 102-04353-WE I/SAB/RKR September 29, 1999 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

References:

1.

Letter 102-04224-JML/SAB/RKR, dated December 16, 1998, from J. M. Levine, APS, to NRC, "Request for Amendment to Technical Specification (TS) 3.8.1, AC Sources - Operating and 3.3.7, Diesel Generator (DG) - Loss of Voltage Start (LOVS)"

Letter 102-04310-WEI/SAB/RKR, dated July 16, 1999, from W. E.

Ide, APS, to NRC, "Response to NRC Request for Additional Information Regarding Proposed Amendment to Technical Specifications (TS) 3.8.1, AC Sources - Operating and 3;3.7, Diesel Generator (DG) - Loss of Voltage Start (LOVS)"

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2 and 3 Docket Nos. STN 50-528/529/530 Response to NRC Request for Additional Information Regarding Proposed Amendment to Technical Specifications (TS) 3.8.1, AC Sources -Operating and 3.3.7, Diesel Generator (DG) - Loss of Voltage Start (LOVS)

In a letter to Arizona Public Service Company (APS) dated June 14, 1999, additional information regarding APS's request for an amendment (reference

1) to Technical Specifications 3.8.1, "AC Sources Operating" and 3.3.7, "Diesel Generator (DG)-

Loss of Voltage Start" was requested by the NRC.

In the response to the NRC request for additional information (reference 2), APS agreed to provide

1) the results of the voltage criteria review for the spray pond pump house exhaust fans discussed in the response to NRC Request 3, 2) the Bases change discussed in the response to NRC Request 10, and 3) the Technical Specification changes discussed in the responses to NRC Requests 11 and 12.

O'Fi0050i08 990929, PDR ADOCK 05000528 P

PDR'~

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U, S. Nuclear Regulatory Commission ATTN: Document Control Desk Responses to NRC Request for Additional Information

,Page 2 In response to NRC Request 3 (reference 2), APS has completed the review of electrical safety equipment, including the spray pond pump house exhaust fans and has determined that safety equipment will meet their voltage criteria if offsite voltage is at a point just above a value at which the degraded voltage relay (DVR) would actuate.

In response to NRC Request 10 (reference 2), attached are the revised Bases pages that provide additional discussion of the options available to exit Required Action G of Technical Specification 3.8.1, "AC Sources Operating."

In response to NRC Requests 11 and 12, attached is the revised page for Technical Specification 3.3.7, "Diesel Generator (DG) Loss of Voltage Start (LOVS)"

surveillance requirement (SR) 3.3.7.3.

In addition to the changes described in Reference 1, a minimum time delay of t28.6 seconds has been added to the Degraded Voltage function in SR 3.3.7.3a.

The SR 3.3.7.3b requirements for the Loss of Voltage relays have also been revised. A minimum time delay of t2.0 seconds has been added to the time delay at zero volts. The time delay at the maximum voltage of 2929.5 volts is being reinserted in the SR.

The time delay for the maximum voltage is also being revised from <11A seconds to a time delay with a range of t10.3 seconds and <12.6 seconds.

The time delays are based on a+10 percent tolerance band.

APS has reviewed the initial Technical Specification change request (reference

1) and has determined that these changes do not affect the original "No Significant Hazards Considerations."

The changes only affect the description of the specific changes as described above.

No commitments are being made to the NRC by this letter.

Please contact Mr. Scott Bauer at (623) 393-5978 ifyou have any questions or would like additional information regarding this matter.

Sincerely, Attachments WEI/SAB/RKR/mah cc:

E. W. Merschoff N. Kalyanam J. H. Moorman A. V. Godwin

I

),

STATE OF ARIZONA

)

) ss.

COUNTY OF MARICOPA

)

I, W. E. Ide, represent that I'am Vice President Nuclear Production, Arizona Public Service Company (APS), that the foregoing document has been signed by me on behalf of APS with full authority to do so, and that to the best of my knowledge and belief, the statements made therein are true and correct.

W. E. Ide Sworn To Before MeThis~'ay Of 1999.

My Commission Expires Notary Public "OFFICIALSEAL" Nora E. Meador Notary Public.Arizona Maricopa County M Commission Ex ires 2003

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