ML17333A192
| ML17333A192 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/14/1992 |
| From: | Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 102-02243-WFC-T, 102-2243-WFC-T, NUDOCS 9208240237 | |
| Download: ML17333A192 (5) | |
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ACCESSION NBR: 9208240237 DQC. DATE: 92/08/14 NOTARIZED:
NQ DOCKET 0 FACIL: STN-50-528 Palo Verde Nuclear Stationi Unit li Arizona Publi 05000528
,STN-50-529 Palo Verde Nuclear Stationi Unit 2i Arizona Publi 05000529 STN-50-530 Pala Verde Nuc leaY Station>
Unit 3. Arizona Pub li 05000530 AUTH. NAME AUTHOR AFFILIATION CONMAYiM. F.
Arizona Public Service Co.
(formerly Arizona Nuclear Pacer RECIP. MANE RECIPIENT AFFILIATION Dacument Control Branch (Document Control Desk)
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SUBJECT:
Discusses schedule change for manitaring spray ponds.
Operating spray pand sos three times per ek eill not apply sos tagged out af svci to accomadate maint 5 scheduled autages.
DISTRlBUTION CODE'OOlD COPIES RECEIVED: LTR ENCL SIZE:
TITLE:
OR Submittal:
General Distribution NOTES: STANDARDIZED PLANT Standard i z ed p lant.
Standard i zed plant.
RECIPIENT ID CODE/NANE PD5 LA TRANMELL~C COPIES LTTR ENCL 1
2 t
RECIPIENT ID CODE/NANE PD5 PD THOMPSON> C COPIES LTTR ENCL 0500052 0500052'g 0500053b D
INTERNAL: ACRS NRR/DQEA/OTSBll NRR/DST/SICBGH7 NUDOCS-ABSTRACT GGC/HDSl RES/DSIR/EIB EXTERNAL:
NRC PDR NRR/DET/ESGB NRR/DST/SELB 7E NRR/DST/SRXB 8E REG FILE NSIC 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!
0 TOTAL NUMBER QF COPIES REQUIRED:
LTTR 24 ENCL
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WILLIAMF. CONWAY EXECUTIVEVICEPRESIOENT NUCLEAR Arizona Public Service Company P.O. BOX 53999
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PHOENIX, ARIZONA85072<999 102-02243-WFC/TRB/JRB Avgust 14, 1992 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555
Reference:
Letter 161-00551-JGH/PGN, dated October 1, 1987, from J. G. Haynes, APS, to NRC, "Spray Pond Monitoring Program"
Dear Sirs:
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Units 1, 2, and 3 Docket Nos. STN 50-528/529/530 Spray Pond Monitoring Program Schedule Change File: 92-056-026 PVNGS Technical Specification 6.8.4.f. requires the spray ponds to be monitored in accordance with PVNGS Station Manual Procedures.
Currently, the administrative procedure requires operating the spray pond system with flowdirected through the spray nozzles every other day.
This frequency was established in the referenced letter.
In November 1991, Arizona Public Service Company identified that the Unit 1 spray ponds were only being circulated three times per week in some instances.
This issue was documented and corrected in accordance with the PVNGS Quality Assurance Program.
Spray pond circulation, in conjunction with chemical additions, is necessary to control microbiological activity and piping corrosion.
Spray pond chemistry data from Unit 1, which had been circulated three times per week, was compared to spray pond chemistry data from Unit 2, which had been circulated at the required frequency of every other day.
This comparison indicated that there was essentially no difference in the microbiological activity and piping corrosion between the two frequencies of circulation.
Based on the results of this comparison, the frequency for operating the spray pond system will be changed to.three times per week.
This reduced frequency will also reduce pump starts and provide additional operating flexibility.
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U. 8. Nuclear Regulatory Commission ATTN: Document Control Desk Spray Pond Monitoring Program Schedule Change Page 2 To accommodate maintenance and scheduled outages, operating the spray pond system three times per week will not apply ifthe system is tagged "out of service."
The system engineer will be contacted if the system is "out of service" for three weeks or longer to determine the need for compensatory actions.
If you should have any questions, please contact Thomas R. Bradish of my staff at (602) 393-5421.
Sincerely, WFC/TRB/JR B/pmm cc:
J. B. Martin J. A. Sloan A. C. Gehr A. H. Gutterman
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