ML20197D068

Reissues Ltr Correcting Encl 2 Re NRC Review Documented in SE & Sandia Rept, Review of 971003 Entergy River Bend Ampacity Derating RAI Response. No Ampacity Derating Issues as Identified in GL 92-08 for Plant

ML20197D068
Person / Time
Site:	River Bend
Issue date:	09/03/1998
From:	Wigginton D NRC (Affiliation Not Assigned)
To:	Mcgaha J ENTERGY OPERATIONS, INC.
Shared Package
ML20197D072	List: ML20197D068 ML20197D075
References
GL-92-08, GL-92-8, TAC-MA2242, NUDOCS 9809150265
Download: ML20197D068 (3)

Text

Mr. John R. McGiha, Jr.

September 3, 1998 Vice Prssidsnt - Operations

Entsrgy Operations, Inc.

River Bend Station e;

P. O. Box 220 RE-ISSUED TO CORRECT St. Francisville, LA 70775 ENCLOSURE 2

SUBJECT:

RIVER BEND STATION, UNIT 1 -THERMO-LAG RELATED AMPACITY DERATING (TAC NO. MA2242)

Dear Mr. McGahe:

By letter dated October 3,1997, Entergy Operations, Inc. (EOl) submitted a response to the NRC request for additional information dated May 12,1997, related to the cable ampacity due to application of Thermo-Lag fire barrier for River Bend Station, Unit 1. EO1 stated that the Thermo-Lag 330-1 fire barriers installed at the facility for Appendix R related electrical circuits will be removed from service and the subject cables were evaluated for age related degradation l through the measurement of cable indentation. The results of our review are documented in I the enclosed Safety Evaluation (Enclosure 1) and the Sandia National Laboratory (SNL) report, l "A Revi6w of The 10/3/07 Entergy River Bend Ampacity Derating RAI Response," dated January 20,1998, (Enclosure 2).

We have reviewed the EOl submittal and conclude that there are no ampacity derating issues as idenulied in Generic Letter 92-08 for River Bend Station. We have further concluded that the thermal model as currently implemented is not acceptable for ampacity assessments. Given that the fire barriers have been removed from the applicable electrical raceways and field l observation indicate no signs of age related cable degradation, the thermal modelis nct  ;

necessary for issue resolution. Due to the issues raised during this review, the subject safety evaluation (Enclosure 1) may be used in followup inspection. This completes our action under l TAC No, MA2242.

Sincerely, ORIGINAL SIGNED BY:

David L. Wigginton, Senior Project Manager j Project Directorate IV-1 9809150265 980903 Division of Reactor Projects lil/IV DR ADOCK 0500 8 Office of Nuclear Reactor Regulation Docket No. 50-458

Enclosures:

As stated cc w/encis: See next page DISTRIBUTION-31mr43 A "'

Docket File PUBLIC CPD4-1 r/f + J.Hannon C. Hawes D. Wigginton T. Gwynn, RIV g ACRS OGC (15B18) E. Adensam (EGA1) p}

Document Name: RBMA2242.LTR /

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DATE ff /N/98 3 /d /98 /h/98 COPY Yd@NO YES/NO YES/NO OFFICIAL RECORD COPY

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UNITED STATES a ;5

• NUCLEAR REGULATORY COMMISSION -

l o WASHINGTON, D.C. 30seH001 j

RE-ISSUED TO CORRECT 1

%[***** ENCLOSURE 2 September 3, 1998 l Mr. John R. McGaha, Jr.  !

Vice President - Operations Entergy Operations, Inc.

River Bend Station j P. O. Box 220 '

St. Francisville, LA 70775

SUBJECT:

RIVER BEND STATION, UNIT 1 - THERMO-LAG RELATED AMPACITY DERATING (TAC NO. MA2242)

Dear Mr. McGaha:

By letter dated October 3,1997, Entergy Operations, Inc. (EOI) submitted a response to the NRC request for additional information dated May 12,1997, related to the cable ampacity due to application of Thermo-Lag fire barrier for River Bend Station, Unit 1. EOl stated that the l Thermo-Lag 330-1 fire barriers installed at the facility for Appendix R related electrical circuits  !

will be removed from service and the subject cables were evaluated for age related degradation i

through the measurement of cable indentation. The results of our review are documented in  ;

the enclosed Safety Evaluation (Enclosure 1) and the Sandia National Laboratory (SNL) report, {

"A Review of The 10/3/97 Entergy River Bend Amracity Derating RA! Response," dated January 20,1998, (Enclosure 2). l We have reviewed the EOl submittal and conclude that there sre ampacity derating issues as identified in Generic Letter 92-08 for River Bend Station. We have fueer concluded that the thermal model as currently implemented is not acceptable for ampacity asussr ents. Given that the fire barriers have been removed from the applicable electrical raceways and field '

observation indicate no signs of age related cable degradation, the thermal model is not necessary for issue resolution. Due to the issues raised during this review, the subject safety evaluation (Enclosure 1) may be used in followup inspection. This completes our action under TAC No. MA2242.

Sincerely, 0  ;

/

David L. nton, Senior Project Manager Project Directorate IV-1 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation Docket No. 50-458  ;

Enclosures:

As stated cc w/encis: See next page

Mr. John R. McGaha Entergy Operatbns, Inc. River Bend Station cc:

Winston & Strawn Executive Vice President and 1400 L Street, N.W. Chief Operating Officer Washington, DC 20005-3502 Entergy Operations, Inc.

' P. O. Box 31995 Manager- Licensing Jackson, MS 39286 Entergy Operations, Inc.

River Bend Station General Manager - Plant Operations P. O. Box 220 Entergy Operations, Inc.

St. Francisville, LA 70775 River Bend Station P. O. Box 220 Senior Resident inspector St. Francisville, LA 70775

P. O. Box 1050 St. Francisville, LA 70775 Director- Nuclear Safety 4-Entergy Operations, Inc.

President of West Feliciana River Bend Station Police Jury P. O. Box 220 P. O. Box 1921 St. Francisville, LA 70775 St. Francisville, LA 70775 Vice President - Operations Support Regional Administrator, Region IV Entergy Operations, Inc.

U.S. Nuclear Regulatory Commission P. O. Box 31995 611 Ryan Plaza Drive, Suite 1000 Jackson, MS 39286-1995 ,

, Arlington,TX 76011 Attomey General Ms. H. Anne Plettinger State of Louisiana 3456 Villa Rese Drive P. O. Box 94095 Baton Rouge, LA 70806 Baton Rouge, LA 70804-9095 Administrator Wise, Carter, Child & Caraway .

Louielana Radiation Protection Division P. O. Box 651 P. O. Box 82135 Jackson, MS 39205 Baton Rouge, LA 70884-2135

,