ML17305B504
| ML17305B504 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 04/29/1991 |
| From: | Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9105070020 | |
| Download: ML17305B504 (5) | |
Text
FORD 1
REGULY INFORMATION DISTRIBUTI SYSTEM (RIDE)
ACCESSION NBR:9105070020 DOC.DATE: 91/04/29 NOTARIZED: NO DOCKET 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 RECIP.NAME RECIPIENT AFFILIATION Document.Control Branch (Document Control Desk)
SUBJECT:
Submits explanation of action to be taken re main steam safety valves s pressurizer safety valves per 901113 amend request.
DISTRIBUTION CODE:
AOOID COPIES RECEIVED:LTR i ENCL 0 SIZE:
TITLE: OR Submittal: General Distribution NOTES:STANDARDIZED PLANT Standardized plant.
Standardized plant.
RECIPIENT ID CODE/NAME PD5 LA TRAMMELL,C INTERNAL: ACRS NRR/DET/ESGB NRR/DST 8E2 NRR/DST/SICB 7E NUDOCS-ABSTRACT OGC/HDS1 RES/DSIR/EIB EXTERNAL: NRC PDR NOTES:
COPIES LTTR ENCL RECIPIENT ID CODE/NAME PD5 PD THOMPSON,M NRR/DET/ECMB 9H NRR/DOEA/OTSB11 NRR/DST/SELB 8D NRR/DST/SRXB 8E OC/LFMB RFG NSIC COPIES LTTR ENCL 05000528 33 05000529 05000530 ~
a TOTAL NUMBER OF COPIES REQUIRED:
LTTR 27 ENCL
Arizona Public Service Company P.O, BOX 53999
~
PHOENIX, ARIZONA85072<999 WILLIAMF. CONWAY EXECUTIVEVICEPRESIDENT NUCLEAR 161-03907-WFC/I'KP April 29, 1991 Docket Nos.
STN 50-528/529/530 U.
S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station Pl-37 Washington, D.
C.
20555
References:
1)
APS letter from W. F.
Conway to USNRC Document Control Desk, "Proposed Technical Specification Amendment to Sections 3/4.3.1, 3/4.4.2, 3/4.7.1, and 3/4.7.1.2,"
161-03587, dated November 13, 1990 2)
ASME Boiler 'and Pressure Vessel Code,Section XI, 1980 Edition, Winter 1981 Addenda
Dear Sirs:
Subj ect:
Palo Verde Nuclear Generating Station (PVNGS)
Units 1, 2,
and 3
Supplemental Information to Support the Proposed Technical Specification Amendment to Sections 3/4.3.1, 3/4.4.2, 3/4.7.1, and 3/4.7.1.2 File: 91-056-026 In Reference (1)
3 Technical Specifications.
The proposed changes would increase the allowable setpoint tolerance for the Main Steam Safety Valves (MSSV's) and Pressurizer Safety Valves (PSVs), reduce the minimum required
~uxiliary feedwater (AFW) flow, and reduce the high pressurizer pressure trip (HPPT) response time.
Regarding the MSSVs and PSVs, the current Technical Specification tolerance for these valves is + 1%.
The proposed amendment would allow tolerances of + 3% for the MSSVs and
+3%,
-1% for the PSVs.
- However, the amendment request did not explicitly state the action that will be taken when ASME Code (Reference 2) required testing finds valves with setpoints outside
+
1%,
but within the proposed tolerance limits.
APS will adjust the MSSVs and PSVs to within +
1%
of the required setpoint.
For MSSVs and PSVs found outside the proposed setpoint tolerances, APS will continue to:
- 1) adjust the valves to within +
1% of the required setpoint,
- 2) test additional valves as required by Reference 2, and 3) meet documentation and problem identification requirements for evaluation of the condit'on and reporting (e.g.,
Licensee Event Report), if applicable.
9105070020 910429 PDR ADOCK 05000528 p
PDR 66I.'~80 to'I I(O
1 I
f f
1
U.
S. Nuclear Regulatory Commission Attn:
Document Control Desk Tech.
Spec.
Amendment Page Two If you should have any questions, please contact Michael E. Powell of my staff at (602) 340-4981.
Sincerely, WFC/MEP/pmm cc:
J.
B. Martin D. H.
Coe N.
C. Loftin A. H. Gutterman C.
E. Tedford