ML17305A906

From kanterella
Jump to navigation Jump to search
Suppls 891114 Response to Violations Noted in Insp Rept 50-528/89-16.Application for Amend to License NPF-41 Will Be Submitted in Oct 1990 to Permit Lower Flow Rate for RCS & Shutdown Cooling Sys
ML17305A906
Person / Time
Site: Palo Verde Arizona Public Service icon.png
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 05000528 Standardized plant. 05000529 Standardized plant. 05000530

?

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR E CL ID CODE/NAME LTTR ENCL PD 'D5 1 PETERSON,S.

CHAN,T 1 RNAL: ACRS AEOD '1 AEOD/DEIIB AEOD/TPAD 1 DEDRO NRR MORISSEAU,D 1 NRR SHANKMAN,S NRR/DLPQ/LPEB10 1 NRR/DOEA DIR 11 NRR/DREP/PEPB9 D 1 NRR/DRIS/DIR NRR/DST/DIR 8E2 1 NRR/PMAS/ILRB12 NUDOCS-ABSTRACT 1

~ ~

02 OGC/HDS1 RGN5 FILE 01 l.

1 EXTERNAL: LPDR NRC PDR NSIC NOTES:

D A

D D

NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WAS'ONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

OTAL NUMBER OF COPIES REQUIRED: LTTR 26 ENCL

i Arizona Public Service Company P.O. BOX 53999 ~ PHOENIX. ARIZONA 85072-3999 102-01757-WEC/TRB/JJN WILLIAMF. CONWAY EXECUTIVEVICE PRESIDENT NUCLEAR 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

Dear Sirs:

Sub j ect: 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)

OI 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 will be 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 go(

O PDC

/I I

NRC Document Control Desk 102- 01757 - WFC/TRB/J JN Page 2 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 A. H. Gutterman D. H. Coe T. L. Chan A. C. Gehr