ML17305A259
| ML17305A259 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 09/21/1989 |
| From: | Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 161-02345-WFC-R, 161-2345-WFC-R, IEB-88-004, IEB-88-4, NUDOCS 8910030489 | |
| Download: ML17305A259 (6) | |
Text
AcCp~~TED ISTKBUTIOY DEMONs.
XTlON SY> TZg REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR;8910030489 DOC.DATE: 89/09/21 NOTARIZED: NO DOCKET N
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 Publ' 05000530-AUTH.NAME AUTHOR AFFILIATION CONWAYPW.F.
Arizona Public Service Co.
(formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Forwards supplemental response to Bulletin 88-004.
DISTRIBUTION CODE:
IE37D COPIES RECEIVED:DTR + ENCI f SIZE: 1 TITLE: Bulletin 88-004 re Potential Safety-Related Pump Loss NOTES:
Standardized plant.
Standardized plant.
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Arizona Public Service Company P,O< BOX 53999
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PHOENIX. ARIZONA85072.3999 WILLIAMF. CONWAY EXECUTIVEVICEPRESIDENT NUCLEAR 161-02345-WFC/RAB September 21, 1989 Docket Nos.
STN 50-528/529/530 Document Control Desk U.
S. Nuclear Regulatory Commission Hail Station Pl-37 Washington, D.
C.
20555
References:
(1)
Letter from E.
E. Van Brunt, Jr.,
(ANPP) to USNRC Document Control Desk dated July 8, 1988 (161-01159).
Subject:
Response
to NRC Bulletin No. 88-04 (2)
Letter from D.
B. Karner, (APS) to USNRC Document Control Desk dated August 29, 1988 (161-01270).
Subj'ect:
Additional Response to NRC Bulletin No.
88-04
Dear Sirs:
Subj ect:
Palo Verde Nuclear Generating Station (PVNGS)
Units 1, 2,
and 3
Supplemental
Response
to NRC Bulletin No. 88-04 File:
89-A-056-026; 89-055-026
'eference (1). transmitted the Arizona Public Service (APS) response to NRC Bulletin 88-04.
Reference (2) provided some of the information which was not available to prepare the initial response.
At the time that Reference (2) was submitted, APS was still awaiting information from Ingersoll-Rand, manufacturer of the PVNGS High and Low Pressure Safety Injection Pumps, Containment Spray Pumps and Condensate Transfer Pumps.
The attachment to this letter provides a
summary of the evaluation results for these pumps.
If you have any questions, call A. C. Rogers at (602) 371-4041.
Sincerely, WFC/RAB/jle Attachment cc:
J.
B. Hartin T. L. Chan M. J.
Davis T. J. Polich A.
C.
Gehr (all w/attachment) 2E37 8910030489 890921 PDR ADQCK 05000528 Q
PNU
V
Attachment Pum Vendor Evaluation Results APS requested Ingersoll-Rand (IR), manufacturer of the High and Low Pressure Safety Injection Pumps; the Containment Spray Pumps; and the Condensate Transfer
- Pumps, to determine if the existing minimum. flow rates were sufficient to preclude pump damage during minimum flow operations'R determined that at the specified miniflow rates, degradation of pump seals may occur.
The vendor provided a methodology by which the effect of pump operation on miniflow can be accounted for in determinin'g when seals should be replaced.
The amount of time of pump operation above miniflow conditions, the number of starts/stops, and the amount of.time at miniflow conditions are used to calculate useful seal life.
The vendor also states that pump operation at miniflow conditions are not prohibited, but must be monitored for their long-term effects.
Additionally, he stated that seal degradation is proportional to increases in vibration.
The-surveillance requirements for these pumps include vibration monitoring measuring pump head, and a visual inspection for leakage.
These surveillance requirements are performed on a quarterly basis.
Current'lans for PVNGS include a component, evaluation system which will take the necessary data from the plant computer and ERFDAD.data acquisition system to compute seal life.
This project is scheduled for completion in the second quarter of 1990.
Until a trending system can be developed, a periodic routine maintenance task will be instituted at the required frequency (based on IR data) to ensure seal lifetimes are not exceeded.
The Engineering Evaluation Department will review each of the affected pumps'aintenance history to determine when the seals were last replaced, and will issue work requests, as appropriate, to replace seals prior to exceeding their useful lifetime.
Surveillance test vibration data willalso be reviewed for each pump to ensure that no increase in vibration has occurred.
Thi.s review is expected to be completed by October 15, 1989.
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