ML17306A980

Forwards Response to NRC Questions Identified During 920629 Telcon Re 910909 Amends to Licenses NPF-41,NPF-51 & NPF-74, Revising TS 3/4.7.1 to Delete auto-closure Interlock Surveillance Requirements.W/Six Oversize Drawings

ML17306A980
Person / Time
Site:	Palo Verde
Issue date:	09/03/1992
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17306A982	List: ML17306A980 ML17306A983 ML17306A984 ML17306A985 ML17306A987 ML17306A998
References
102-02268-WFC-D, 102-2268-WFC-D, NUDOCS 9209250251
Download: ML17306A980 (9)

Text

DOCKET 05000528 05000529 05000530 acczxxa.wrZD D Sea.ram.rOx DHMOw ra.wrrOx SvSrzM REGULAT INFORMATION DISTRIBUTIO

,YSTEM (RIDS) k ACCESSION NBR:9209250251 DOC.DATE: 92/09/03 NOTARIZED: YES FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi AUTH.NAME AUTHOR AFFILIATION LEVINE,J.M.

Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Forwards response to NRC questions identified during 920629 telcon re 910909 amends to Licenses NPF-41,NPF-51

& NPF-74, revising TS 3/4.7.1 to delete auto-closure interlock surveillance requirements.W/six oversize drawings.

DISTRIBUTION CODE:

AOOID COPIES RECEIVED:LTR 3 ENCL J SIZE:

TITLE: OR Submittal: General Distribution NOTES:STANDARDIZED PLANT Standardized plant.

Standardized plant.

/

05000528 05000529 A

05000530 D

RECIPIENT ID CODE/NAME PD5 LA TRAMMELL,C INTERNAL: ACRS NRR/DOEA/OTSB11 NRR/DST/SICB8H7 NUDOCS-ABSTRACT OGC/HDS1 RES/DSIR/EIB EXTERNAL: NRC PDR COPIES LTTR ENCL 1

1 2

2 6

6 1

1 1

1 1

1 1

0 1

1 1

1 RECIPIENT ID CODE/NAME PD5 PD NRR/DET/ESGB NRR/DST/SELB 7E NRR/DST/SRXB 8E 88 REG FIL 01 NSIC COPIES LTTR ENCL 1

1 1

1

~i 1

0 1

1 1

1 NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK.

ROOM Pl-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED:

LTTR 22 ENCL 20

A I

I

WILLIAMF. CONWAY EXECUTIVEVICEPR ESI DENT NUCLEAR Arizona Public Service Company P,O. BOX 53999

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PHOENIX, ARIZONA85072-3999 102-02268-WFC/DAF September 3,

1992 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555

Reference:

Letter 161-04155-WFC/DAF, dated September 9, 1991, from W. F. Conway,

APS, to

NRC, "Proposed Technical Specification Amendments to Specification 3/4.7.11"

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units1,2, and 3 Docket Nos. STN 50-528/529/530 Technical Specification Amendment to Delete Auto-Closure Interlock Surveillance Requirements File: 92-005-41 9.05 92-056-026 During a telephone conference between Arizona Public Service Company (APS) and the NRC on June 29, 1992, the NRC identified questions regarding the referenced amendment request.

Enclosed is the APS response to these questions.

If you should have further questions, please contact Thomas R. Bradish of my staff at (602) 393-5421.

Sincerely, WFC/DAF/pmm Enclosure cc:

J. B. Martin J. A. Sloan C. M. Thompson A. C. Gehr A. H. Gutterman 920925025i 920903 PDR ADOCK 05000528" P

PDR

STATE OF ARIZONA

)

) ss.

COUNTY OF MARICOPA )

I, J. M. Levine, represent that I am Vice President Nuclear Production, 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 and correct.

J. M. Levine Sworn To Before Me This Day Of a~e

~

~ gg2 Notary. Public My Commission Expires My Commission Expires 0!c. 12, 1992

J 4

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ENCLOSURE NRC QUESTION 1're alarms already in place or is a modification needed to install them?

APS RESPONSE 1:

Alarms are already in place and no modification is necessary.

NRC QUESTION 2:

Are the valve position indicators independent of the alarms?

APS RESPONSE 2:

The position indication is electrically separate from the position alarms.

The alarm and position indicators use the same rotor, however, they use different limitswitches for input.

The position indicators are therefore independent of the alarms.

(See attached electrical elementary electrical diagrams for Unit 1 (Units 2 and 3 are identical)).

NRC QUESTION 3'hat will procedures direct operator to do when alarm sounds (assuming ACI has been deleted)?

APS RESPONSE 3:

Annunciator window 2B08A (from procedure 40AL-9RK2B, Panel Alarm Response) addresses the LTOP valves.

The panel annunciates when the RCS pressure is greater than 410 psia and either valves Sl-UV-653 are not fully closed or valves Sl-UV-652 and UV-654 are not fullyclosed. This audible/visual alarm willnotifythe operator of increasing RCS pressure.

With the Auto-Closure Interlock permanently removed, additional actions will be needed.

Procedure 40AL-9RK2B directs operators to follow first and second priority operator actions for alarm responses (see attached procedural excerpts for the LTOP valves).

A generic listing of operator actions to be added to this procedure after approval of this amendment is as follows:

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check RCS pressure to validate the alarm

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attempt to locate cause of increasing RCS pressure and rectify this condition

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at some predetermined pressure below 500 psia, 1) stop SDC pumps, 2) close the outside containment SDC valves Sl-UV-655 and UV-656 and, 3) enter procedure 4XAO-XZZ22, Loss of Shutdown Cooling Attachment

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ATTACHMENT

- REFERENCE DRAWINGS 01-E-SIB413/014/015

- PROCEDURES ASSOCIATED WITH ALARMRESPONSE:

40AL-9RK2B 41AL-1ES2A (FOR UNIT 1) 41AL-1ES2B (FOR UNIT 1)