ML17305A906
| ML17305A906 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 06/26/1990 |
| From: | Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 102-01757-WFC-T, 102-1757-WFC-T, NUDOCS 9007050037 | |
| Download: ML17305A906 (6) | |
Text
ACCELERATED DISTRJBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:9007050037 DOC.DATE: 90/06/26 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:
Provides addi reply to violations noted in Insp Rept 50-528/89-16,per 891114 ltr.
DISTRIBUTION CODE: IEOID COPIES RECEIVED: LTR L ENCL 0 SIZE:
TITLE: General (50 Dkt)-Insp Rept/Notice of Violation Response NOTES Standardized plant.
Standardized plant.
RECIPIENT ID CODE/NAME
'D5 PD CHAN,T RNAL: ACRS AEOD/DEIIB DEDRO NRR SHANKMAN,S NRR/DOEA DIR 11 NRR/DRIS/DIR NRR/PMAS/ILRB12
~ ~
02 EXTERNAL: LPDR NSIC NOTES:
COPIES LTTR E 1
1 CL RECIPIENT ID CODE/NAME PETERSON,S.
AEOD AEOD/TPAD NRR MORISSEAU,D NRR/DLPQ/LPEB10 NRR/DREP/PEPB9 D NRR/DST/DIR 8E2 NUDOCS-ABSTRACT OGC/HDS1 RGN5 FILE 01 NRC PDR COPIES LTTR ENCL
'1 1
1 1
1 1
1l.
1
/
05000528 05000529 05000530
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D NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WAS'ONTACTTHE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAMEFROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
OTAL NUMBER OF COPIES REQUIRED:
LTTR 26 ENCL A
D D
i
WILLIAMF. CONWAY EXECUTIVEVICEPRESIDENT NUCLEAR Arizona Public Service Company P.O. BOX 53999
~
PHOENIX. ARIZONA85072-3999 102-01757-WEC/TRB/JJN June 26, 1990 U.
S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
Reference:
Letter from W. F. Conway, Executive Vice President Nuclear, Arizona Public Service, to Document Control Desk, NRC, dated November 14, 1989 OI
Dear Sirs:
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Unit 1, 2,
and 3
Docket No.
STN 50-528 (License No. NPF-41)
Docket No.
STN 50-529 (License No. NPF-51)
Docket No.
STN 50-530 (License No. NPF-74)
Addendum to Reply to Notice of Violation 50-528/89-16-03 File:
90-070-026 This letter provides an update on the actions taken to date and those actions planned to revise the operational procedures for shutdown cooling and midloop operations.
As stated in the referenced letter, testing was conducted in Units 1 and 3 to determine actual flow conditions in the Reactor Coolant System (RCS) and Shutdown Cooling System (SDC).
This testing has been performed in Unit 2 during the current refueling outage.
In addition, the scale model testing to study the vortex and air entrainment phenomena is complete.
APS is now analyzing the data which was obtained during testing.
The results of this analysis willbe used to modify the operational procedures.
The analysis is expected to be completed by August 1, 1990.
The vortex and air entrainment phenomena are highly dependent on the SDC flow and RCS level.
Technical Specifications (TS) require a minimum of four thousand gallons per minute.
At this flow rate during midloop operation, testing shows that the margin to vortexing and air entrainment is low.
Consequently, APS intends to request an amendment to the TS which would permit a lower flow rate
~
This request is expected to be submitted in October, 1990.
9()( I705('.I037 900Ci26 PDR ADOCK 0 000528 O
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NRC Document Control Desk Page 2
102- 01757 -WFC/TRB/JJN
- June26, 1990 Should you have any questions regarding this response, please contact me.
Very truly yours, WFC/TRB/JJN/tlg Attachments cc:
J.
B. Martin D. H.
Coe A. C. Gehr A. H. Gutterman T. L. Chan