ML17305B011

Responds to Request for Addl Info Re Emergency Lighting,Per Insp Repts 50-528/90-25,50-529/90-25 & 50-530/90-25. Availability Info Provided in Ref 2,most Appropriate Analysis of Lighting Sys Availability

ML17305B011
Person / Time
Site:	Palo Verde
Issue date:	08/15/1990
From:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
161-03406-WFC-R, 161-3406-WFC-R, NUDOCS 9008290148
Download: ML17305B011 (26)

Text

ACCELERATED DISTRIBUTION DEMONS'7RATION SYSTEM REGULATORY INFORMATXON DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:900 8290148 DOC.DATE: 90/08/15 NOTARIZED: NO DOCKET g FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH. NAME AUTHOR'AFFILIATION CONWAY,W.F. Arizona Public Service Co. (formerly Arizona Nuclear Power R RECIP.NAME RECIPIENT AFFILIATION MARTIN,J.B. Region 5 (Post 820201)

SUBJECT:

Responds to request for addi info re emergency lighting,per D Xnsp Repts 50-528/90-25,50-529/90-25 & 50-530/90-25.

DISTRIBUTION CODE IE01D COPIES'ECEIVED: LTR ENCL Q SXZE: S TITLE: General (50 Dkt)-Insp Rept/Notice f. Vio ation Response /

NOTES:STANDARDIZED PLANT 05000528 Standardized plant. 05000529 Standardized plant. 05000530 D

RECIPIENT COPIES RECIPIENT COPIES D ID CODE/NAME LTTR ENCL AD 'CODE/NAME LTTR ENCL PD5 PD 1 1 PETERSON,S. 1 1 TRAMMELL,C. 1 1 INTERNAL: ACRS 2 2 AEOD 1 1 AEOD/DEXIB 1 1 AEOD/TPAD 1 1 DEDRO 1 1 NRR MORISSEAU,'D 1 1 NRR SHANKMAN,S 1 1 NRR/DLPQ/LPEB10 1 1.

NRR/DOEA DIR 11 1 1 NRR/DREP/PEPB9D 1 1 NRR/DRIS/DIR 1 1 NRR/DST/DIR 8E2 1 1 NRR/PMAS/ILRB12 1 1 NUDOCS-ABSTRACT 1 1 I 1 1 OGC/HDS1' 1 1 I

REG F LE 1 1 FILE 01 1 1 LPDR 02'XTERNAL:

1 1 PDR 1 1 R NSIC 1 1 NOTES 1 1 D

NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE iVASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOivl P l-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUivlENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED:. LTTR 26 ENCL 26

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Pi C=l;-D HHC P.-.".";IC.'f V Arizona Public Service Company p.o. Box 53999 ~ PHQENIx. ARIzoNA85072-3999 fi i" fit'- f 7 jIIf f f': f $

WILLIAMF. CONWAY 161-03406-WFC/RAB EXECUTIVEVICE PRESIDENT NUCLEAR August 15, 1990 Docket Nos. STN 50-528/529/530 Mr. John B. Martin Regional Administrator, Region V U. S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368

Reference:

1) Letter to J.. B. Martin, NRC, from W. F.. Conway, APS, dated June 29, 1990;

Subject:

Emergency Lighting-Failure Data Update (161-03305).

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2) Letter to J.. B. Martin, NRC, from W. F. Conway, APS, dated August 1, 1990;

Subject:

. Response to NRC Inspection Report Nos. 50-528/90-25, 50-529/90-25 and 50-'530/90-25 Safe Shutdown -Emergency Lighting, (161-03373).

Dear Mr. Martin:

Subj ect: Palo Verde Nuclear Generating Station (PVNGS)

Units 1,' and 3 Response to Request for Additional Information-Emergency Lighting File: 90-019-026; 90-056-026 This letter is being provided in response to a request for additional information from Mr. R. Huey, of your staff. The specific information requested was a list of all 8-hour discharge tests that have been performed'on the Exide and Holophane lighting units from 1987 to the present, including an indication as to whether the lighting, unit passed or failed the 8-hour illumination requirement of the test. It was also requested that this information: be correlated to the information provided in Reference 1. The requested information i's provided'n the Attachment to this letter.

Although APS is willing to provide the requested information, we wish to emphasize that the availability information provided in Reference 2 is the most appropriate analysis of the lighting system availability. The data includes the results of (1) regularly scheduled discharge tests as part of the Preventive Maintenance Program, (2) post-corrective maintenance tests, (3) post-modification tests and (4) special tests done as a result of regulatory questions. The latter three categories of tests were done as needed, and not at regular time intervals.

9008290148 900815 PETER AOOCK 05000528 Q PDC leo/

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Mr. John B'. Martin 161-03406-WFC/RAB U. S. Nuclear Regulatory Commission August 15, 1990 Page 2 The analysis of availability provided in Reference 2 reflects a detailed review, for the period from June 29, 1989'o June 30, 1990, of the calculated periods of availability based on actual timing of these tests and, other information.

We believe that such an analysis of'navailability/availability is most representative of the likelihood that, if called upon, the lights would have performed their intended function.

APS has not calculated the availability of these emergency lights for the period prior to June 29, 1989. We believe that the period analyzed, by APS is the most representative of the conditions, at the time of the NRC inspection. At various times prior to June 29, 1989, APS made changes in the, design, equipment and maintenance practices to improve emergency lighting performance. Effects of these changes obviously would not be reflected in the results, of tests, done before the changes were made.

If you should have any questions concerning this information, contact Mr;. R. A.

Bernier at (602) 340-4295.

Sincerely, WFC/RAB Attachment CC'ocument; Control Desk (All w/Attachment)

D'. H. Coe; .

A. H; Gutterman;;

A. C'. Gehr,.

lt ATTACHMENT i'

INTRODUCTION The information in .this attachment was compiled from a review of work orders that document the performance. of eight (8) hour discharge tests on Exide and Holophane inverters and battery banks. The results of the tests are summarized in terms of whether the test passed, failed or was terminated prior to completion.

Tests were terminated when it was determined that the result would not be a valid test of battery capacity'. For example, in two tests a lighting ballast failed during the test performance, and in two other terminated tests reduced wattage lamps were used. The loss of the fixture, as well as the,use of reduced wattage lamps,, resulted in a decrease in load on the battery. These tests would no longer reflect the true inverter load and are thus. considered no longer valid.

The tests which were terminated prior to completion, are included for completeness. APS considered these tests to be neither "passed" nor "failed",

but invalid tests of the inverter and battery performance for the availability evaluation documented in the APS letter of August 1, 1990 (161-03373).

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EXIDE INVERTERS 1-E-QDN-F01 and 1-E-QDN-NOl DATE'PASS FAIL COMMENT 2/3/87 PASSED 1/29/88 PASSED 2/27/90 PASSED 1-E-QDN'-F02 and 1-E-QDN-N02

~DTE ~PASS FAIL COMMENT 2/5/87 PASSED 1/29/88 PASSED 2/27/90 PASSED 2-E-QDN-F01 and 2-E-QDN-N01 DATE ~PASS FAIL COMMENT 2/20/87 PASSED 1/7/89 PASSED.

12/4/89 TERMINATED Test was voluntarily terminated after 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> (12/4/89) since the established illumination criteria was not being met in the Control Room due to lower than required wattage lamps being installed'. This condition would not have precluded the lights from burning 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

'PhSSED'ndicates the specified eI(uipnent provided illIssination for eight (6) hours.

Dates shown in parentheses are the dates oi failure as identified in hPS's letter to the NRC dated June 29, 1990 (161-03305).

'*'ndicates the deficiency was not reported in the June 29, 1990 'letter (161-03305),,but was reported in hPS's letter to the NRC dated hu6ust 1, 1990 (161-03373).

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1/3/90* FAILED This 8-hour discharge ran for only 7 1/2-hours.

Evaluations have not clearly indicated as to whether this inverter tripped or was terminated voluntarily.

With no changes being made since this failure and the successful. 8-hour discharge on 7/29/90, thought the test may have been voluntarily it is terminated in which case the, inverter would have been able to support an 8-hour discharge to do so.

if allowed 4/5/90* TERMINATED A deficiency in the PM task allowed maintenance personnel to terminate the task after 7 1/2-hours..

In this case the task did run for 7 3/4-hours.

The successful retest, with no changes being made, conducted on 7/29/90, indicates that this inverter would have discharged for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> on 4/5/90 had been, allowed to do so.

if it 2-E-QDN-F02 and 2-E-QDN-N02 DATE ~PSS FAIL 4/20/87 PASSED COMMENT'est 1/7/89 PASSED 12/4/89 TERMINATED was voluntarily terminated after 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> since the established illumination criteria was not being met in the Control Room due to lower than required wattage lamps being installed. This condition would not have precluded the lights from burning 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

1/2/90. PASSED 3/12/90 PASSED NOTES: 'PhSSED'ndicates the specified equlpnent provided illumination foz eight (6) hours.

Dates shown in parentheses are the dates of failuze as identified in hPS's letter to the NRC dated June 29, 1990 (161-03305).

'*'ndicates the deficiency was not zeported in the June 29, 1990 letter (161-0330S), hut was zeported in hPS's letter to the NRC dated hugust 1, 1990 (161-03373).

4~ i 3-E-QDN-F01 and 3-E'-QDN-N01 DATE PASS FAIL COMMENT

'/11/89 FAILED Discharge test was never officially started, (6/12/89) since the input breaker kept tripping after being closed. for approximately one. minute. This condition was noted while verifying lamping in the Control Room.

6/12/89 FAILED Input breaker tripped after 7 1/2-hours of (6/12/89) discharge.

7/24/89 FAILED Input. breaker tripped, after 7'/2-hours of (6/12/89) discharge.

8/1/89 PASSED 2/28/90 PASSED 3-E-QDN-F02 and. 3-E-QDN-N02 I DATE ~PASS FAIL'OMMENT 5/11/89 FAILED Discharge. test was never officially started (5/13/89) ~ because of 'an input breaker problem on 3-E-QDN-N01 which was on the same PM..

6/12/89 PASSED 7/24/89 PASSED, 8/1'/89 PASSED NOTES: 'PASSED'ndicates the specified equipment provided illumination for .ei6ht (6) hours.

Dates shown in parentheses are the dates of failure as identified in APS's letter to the NRC dated June 29, 1990 (161-03305).

'*'ndicates the deficiency was not reported in the June 29, 1990 letter (161-03305), hut was reported in APS's letter to the NRC dated husust 1, 1990 (161-03373).

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HOLOPHANE INVERTERS 1-E-QBN-001 DATE ~PASS'IL COMMENT 1/7/87 PASSED 4/22/88 PASSED 12/2/88 PASSED 12/27/89 TERMINATED This test was voluntarily terminated after 7 1/2 (12/27/89) hours of discharge'because no instructions existed in the. PM for actions required ballast is found..

if a faulty light 3/26/90 PASSED 4/30/90 .PASSED 6/15/90 PASSED 1-E-eBN-002 DATE, ~PASS FAIL COMMENT 1/14/88 PASSED 12/1/88 PASSED 12/27/89* TERMINATED This test was voluntarily terminated after 7 1/2 hours of, discharge because no instructions existed in the PM for actions required ballast is found.

if a faulty light (Original deficiency was reported as an incipi'ent failure in the 6/29/90 letter) 3/26/90 PASSED 5/9/90*, FAILED A 7 1/2-hour discharge was performed due to the failure of the new batteries installed.

5/21/90 PASSED NOTES: 'PhSSED'ndicates the speci, fied equipsent provided illussination for ei6ht (8) hours.

,Dates shown in parentheses are the dates of failure as identified in hPS's letter to the NRC dated June 29, 1990 (161-03305).

'*'indicates the deficiency FFas not reported in the June 29, 1990 letter (161-03305), but was reported in hPS's letter to the NRC dated husust 1, 1990 (161-03373).

i 1-E-QBN-003 DATE PASS FAIL COMMENT 2/2/88 PASSED 12/5/88 PASSED 1/17/90 PASSED 2/27/90 PASSED 6/16/90 PASSED 7/6/90 PASSED 1-E-QBN-004

/ASS ~IL ~CO M~EN

,2/2/88 PASSED 12/14/88 PASSED 3/1/90 PASSED 5/8/90 PASSED 2-E-QBN-001 PASS F I ~CONHEN 6/1/87 PASSED 5/4/88 PASSED 3/29/89 PASSED 11/20/89'ASSED The inverter failed to illuminate the emergency 3/5/90'3/16/90)'/12/90 lighting after 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> of discharge.

7/1/90'AILED'ASSED PASSED NOTES: 'PhSSED'ndicates the specified equipcsent provided illumination for eisht (6) hours.

Dates shown in parentheses are the dates of failure as identified in APS's letter to the NRC dated June 29, 1990 (161-03305).

'*'ndicates the deficiency-was not zeported in the June 29, 1990 letter (161-03305), but was reported in APS's letter to the NRC dated husust 1, 1990 (161-03373).

0 i~ 0 2-E-QBN-002 DATE PASS FAIL. COMMENT 9/9/87* FAILED No discharge time was achieved because of a defective transfer relay causing the emergency lights to flicker when. placed on the battery power source.

5/5/88 FAILED Discharge test was terminated after 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> due (5/12/88) to a defective transfer relay causing the emergency lights to flicker.

7/3/89 PASSED 1/11/90 PASSED 3/13/90 PASSED, 7/4/90 PASSED 2-E-QBN-003 DATE PASS FAIL COMMENT 8/9/87 PASSED'ASSED 6/5/89 12/3/89 PASSED 3/13/90 PASSED-4/3/90 PASSED 5/16/90 PASSED NOTES: 'PASSED'ndicates the, specified equipment provided illumination for eight (6) hours.

Dates shown in parentheses are, the dates oi failure as identified in APS's letter to the NRC dated June 29, 1990 (161-03305).

'*'ndicates the deficiency was not reported in the June 29, 1990 letter (161-03305),. but was zepozted in hPS's letter to the NRC dated August 1, 1990 (161-03373).

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2-E-QBN-004 ATE PASS FAIL COMMENT 7/12/87 PASSED 5/5/88 PASSED 3/29/89 PASSED 11/16/89 PASSED 5/11/90 PASSED 3-E-QBN-OOl, DATE FAIL 1/19/89 PASSED 7/22/89 PASSED 10/6/89 PASSED'OMMENT PASSED 6/16/90'PASS 3/9/90 PASSED 3-E-QBN-002'AT PAS S /AFIL. COMMENT 4/15/88 PASSED 10/12/88'ASSED 4/1/89 PASSED 10/5/89 PASSED 4/13/90 PASSED NOTES: 'PhSSED'ndicates the specified equipment provided illumination for eight (6) hours.

Dates shopm in parentheses are the dates of failure as identified in hPS's letter to the NRC dated June 29, 1990 (161-03305).

'*'ndicates the deficiency Psas not reported in the June 29, 1990 letter (161-03305), but was reported in hPS's letter -to the NRC dated hu6ust 1, 1990'(161-03373).

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3-E-QBN-003

~DAT ~PASS FAIL. COMMENT 4/18/88 PASSED 1/19/89 PASSED 6/19/89 PASSED 10/5/89 PASSED 5/3/90* FA'ILED 8-hour discharge, test ran for only 6 3/4-hours due to a combination of deficiencies which will result in- the eventual replacement of all emergency lighting Holophane inverters within. the plant.

A new Holophane inverter and batteries were install'ed and an 8-hour discharge test was successfully completed on 6/18/90.

3-E-QBN-004

~DA ~SS PAIL COMMENT 5/2/88 PASSED 1/19/89 PASSED 6/19/89 PASSED 2/6/90 PASSED NOTES: 'PhSSED'ndicates the specified equipment provided illumination for eisht (6) hours.

Dates shown in parentheses are the dates of failure as identified in-hPS's letter to the NRC dated June 29, .1990 (161-03305).

'"'ndicates the deficiency was not reported in the June 29, 1990 letter (161-03305), but was reported in hPS's letter to the NRC dated hu6ust 1, 1990 (161-03373).

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