ML17312B627

Informs of Revised Scheduled Completion Date from End of First Quarter of 1998 to 971231 Re Resolution of Activities Associated W/Gl 92-08, Thermo-Lag 330-1 Fire Barriers.

ML17312B627
Person / Time
Site:	Palo Verde
Issue date:	08/13/1997
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
102-03992-JML-S, 102-3992-JML-S, GL-92-08, GL-92-8, NUDOCS 9708200109
Download: ML17312B627 (6)

Text

CATEGORY 1-REGULATC INFORMATION DISTRIBUTION +STEM (RIDE)

ACCFSSION NBR:9708200109 DOC.DATE: 97/08/13 NOTARIZED: NO , DOCKET FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 SgN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona.Publi Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 05000529'TN-50-530 AUTH, NAME AUTHOR AFFILIATION LEVINE,J.M. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch'(Document Control Desk)

SUBJECT:

Informs of revised scheduled comoletion date from end of first quarter of 1998 to 971231 re 330-1 resolution of activities associated w/GL 92-08, "Thermo-Lag Fire Barriers."

DISTRIBUTION CODE: A029D COPIES RECEIVED:LTR 1 ENCL TITI E: Generic Letter 92-008 Thermo-Lag 330 Fire Barrier Q SIZE:

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James M. Levine TEL (602)3934300 Mail Station 7602 Palo Verde Nuclear Senior Vice President FAX (602)3S34077 P.O. Box 52034 Generating Station Nuclear Phoenix, AZ 65072-2034 102-03992 - JML/SAB/RMW August 13, 1997 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

References:

1. Letter 102-03833-JML/SAB/NLT, dated D'ecember 31, 1996, from J. M. Levine, Senior Vice President, Nuclear, APS to USNRC Letter 102-03946-WEI/SAB/RMW, dated May 30, 1997, from W. E. Ide, Vice President, Nuclear Engineering, APS to USNRC

3. Letter 102-03894-JML/SAB/RMW, dated March 18, 1997, from W. E. Ide, Vice President, Nuclear Engineering, APS to USNRC Letter 102-03854-WEI/SAB/NLT, dated January 24, 1997, from W. E. Ide, Vice President, Nuclear Engineering, APS to USNRC

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3, Docket Nos. STN 50-528/529/530 Status of PVNGS Activities Associated with the Resolution of Generic Letter 92-08, "Thermo-Lag 330-1 Fire Barriers".

Arizona Public Service Company (APS) has been actively pursuing completion of the activities described in References 1 and 2 associated with the resolution of Generic Letter 92-08, "Thermo-Lag 330-1 Fire Barriers." We are pleased to inform you that our scheduled completion date for these activities has been revised from the end of the first quarter of 1998 to December 31, 1997. This improvement in the schedule was accomplished because work to remove fire barriers in the remote shutdown rooms of each Unit, which was originally scheduled to be completed during Unit outages by the end of the first quarter of 1998, has been successfully performed on-line. A status of the remaining actions is described below.

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U, S. Nuclear Regulatory Commission ATTN: Document Control Desk Page 2 The upgrade of Thermo-Lag 330-1 barriers that will be credited in the Fire Hazard Analysis is now greater than 75% complete in the field. This work is currently on-schedule and will be completed by the end of the third quarter of 1997.

The Unit-specific ampacity evaluations for Thermo-Lag 330-1 enclosed raceways for Units 2 and 3 are also on-schedule and will be completed by December 31, 1997 as previously committed in Reference 2.

The completion of the above items will resolve the issues regarding Thermo-Lag 330-1 installations at PVNGS. It is our understanding that the NRC staff is reviewing our determination that Thermo-Lag 330-1 is acceptable for use as a radiant heat shield in containment as described in Reference 3, as well as our methodology for performing cable ampacity calculations which was described in Reference 4. We believe the approaches taken on these two issues are technically sound and demonstrate acceptable resolution of these issues. Therefore, the schedule for resolution of Generic Letter 92-08 does not include any further activities associated with these issues.

Please contact Mr. Scott Bauer at (602) 393-5978 if you have any questions or comments.

Sincerely, JML/SAB/RMW/rlh cc: E. W. Merschoff K. M. Thomas PVNGS Sr. Resident K. E. Perkins

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