ML17306A626

Discusses Actions Util Has Completed & Those Planned to Address Aspects of Salem Unit 2 Turbine Generator & Fire Event on 911109

ML17306A626
Person / Time
Site:	Palo Verde
Issue date:	03/25/1992
From:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
254-01969-WFC-B, 254-1969-WFC-B, NUDOCS 9204070050
Download: ML17306A626 (5)

Text

ACCELERATED DISTjGBUTION DEMONSTPATION SYSTEM REGULA Y INFORMATION DISTRIBUTI SYSTEM (RIDS)

ACCESSION NBR:9204070050 DOC.DATE: 92/03/25 NOTARIZED: NO DOCKET FACZL: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 MARTIN,J.B. Region 5 (Post 820201)

SUBJECT:

Discusses actions util has completed & those planned to address aspects of Salem Unit 2 turbine generator a fire event on 911109.

DISTRIBUTION CODE: ZEOID COPIES RECEIVED:LTR TITLE: General (50 Dkt)-Insp Rept/Notice of Violation P L ENCL SIZE:

Response

2 NOTES:STANDARDIZED PLANT 05000528 Standardized plant. 05000529 Standardized plant. 05000530 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ZD CODE/NAME LTTR ENCL PD5 PD TRAMMELL,C THOMPSON,M INTERNAL: ACRS AEOD 1

'EOD/DEIIB AEOD/DSP/TPAB 1 DEDRO NRR MORISSEAU,D 1

.NRR/DLPQ/LHFBPT NRR/DLPQ/LPEB10 1 NRR/DOEA/OEAB NRR/DREP/PEPB9H 1

'RR/DST/DIR 8E2 NRR/PMAS/ILRB12 1-NUDOCS-ABSTRACT OE DIR 1 OGC/HDS1 G ILE 02 1 RGN5 FILE 01 EXTERNAL: EG6G/BRYCEFJ.H. NRC PDR NSIC NOTES:

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!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 25 ENCL ~~ O

li~CC,l '.Ig lit"'.i R-"80HJ V Arizona Public Service Company P.O, BOX 53999 ~ PHOENIX. ARIZONA 85072-3999 l>>2 fi"h 27 I:ll [0: 26 WILLIAMF, CONWAY EXECUTIVEVICEPRESIDENT NUCLEAR 254-01969-WFC/8SE/RGK March 25, 1992 Mr. John B. Martin Regional Administration, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368

Reference:

Letter dated January 24, 1992, from J. B. Martin, NRC, to.W. F. Conway, APS, "NRC Region I Augmented Inspection Team (AIT) Review of the November 9, 1991, Salem Unit 2 Turbine-Generator Overspeed and Fire Event"

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3 Docket Nos. STN 50-528/529/530 PVNGS Review of the NRC Region I Augmented Inspection Team (AIT)

Review of the November 9, 1991, Salem Unit 2 Turbine-Generator Overspeed and Fire Event File: 92-029-404 92-056-026 The purpose of this letter is to inform you of the actions Arizona Public Service Company (APS) has completed and those planned to address the aspects of the Salem Unit 2 Turbine-Generator and Fire Event.

On November 11, 1991, APS received notification over the Nuclear Network which

-included preliminary information concerning the Salem event. This information was distributed to management personnel at PVNGS via the PVNGS Tech News.

In December 1991, PVNGS formed a team to investigate this event for applicability to PVNGS. This investigation was based on the information available from the Nuclear Network; The details of NRC Information Notice 91-83 were included in the investigation

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Mr. John B. Martin U.S.'Nuclear Regulatory Commission PVNGS Review of the NRC Region I AIT Report on the Salem Turbine-Generator Event Page 2 when APS received the Information Notice in late December. The investigative team considered system design and other factors that contributed to the Salem event. The three documents available from the Institute of Nuclear Power Operations and the Information Notice on this event were added to the. required reading list for the Operations Department. As an additional precaution, a pre-test briefing was conducted with all testing personnel prior to the January 9, 1992, overspeed test on Unit 2. Prior to this test, the investigative team reviewed the PVNGS Turbine-Generator System configuration and testing procedures to ensure that adequate controls were in place to avoid similar events at PVNGS.

Upon receipt of the additional information included in the AIT report, the original review team (formed in December 1991) was expanded and charged with performing an in-depth review and application of lessons learned at PVNGS. The team is reviewing the event from a plant-wide perspective and will apply the lessons learned to the applicable plant systems, procedures, and programs. The PVNGS review team members have identified the areas of system design, system operation, system testing, system trending, operations procedures, preventative maintenance, emergency planning, and work control as the scope of their review. The preliminary review effort is complete, and the review team members are currently performing their in-depth reviews of assigned action area's.

Corrective actions identified as a result of this review will be scheduled for implementation in a timely manner.

If you have any questions, please contact Brad Ecklund of my staff at (602) 340-4068.

Sincerely, j/ @ted<

WFC/BSE/RGK/skk cc: Document Control Desk D. H. Coe A: H. Gutterman A:,C. Gehr

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