ML20151S531

Forwards SE Re Results of Review Concerning Thermo-Lag Related Ampacity Derating

ML20151S531
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
ML20151S536	List: ML20151S531 ML20151S542 ML20151S566
References
TAC-MA2242, NUDOCS 9809080201
Download: ML20151S531 (3)

Text

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Mr. John R. McGabk Jr. Septemb:r 3, 1998

., Vice Prasid;nt - Operations Ent:rgy Operations, Inc.

River Bend Station 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. McGaha:

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. EOl 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 through the measurement of cable indentation. The results of our review are documented in the enclosed Safety Evaluation (Enclosure 1) and the Sandia N'ational Laboratory (SNL) report, "A Review of The 10/3/97 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 identified 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 observation indicate no signs of age related cable degradation, the thermal model is not necessary for issue .9 solution. 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, ORIGINAL SIGNED BY-David L. Wigginton, Se'nior Project Manager Project Directorate IV-1 Division of Reactor Projects Ill/IV Office of Nuclear Reactor Regulation Docket No. 50-458

Enclosures:

As stated cc w/encis: See next page QlSTRIBUTION:

E Docket File PUBLIC PD4-1 r/f J.Hannon C.Hawes D. Wigginton T. Gwynn, RIV ACRS OGC (15B18) 4. Adensam (EGA1) vbocument Name: RBMA2242.LTR / 1 OFC I$VRQb-1 LA/PD4-1 D/PDh g NAME DNnton/vw CHa N J annon DATE (f /d7/98 $ /d /98 / h/98 b

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COPY Vff@NO YES/NO YES/NO ,

OFFICIAL RECORD COPY 9809080201 980903 PDR ADOCK 05000458 P PDR

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. t UNITED STATES g g NUCLEAR REGULATORY COMMISSION 2 WASHINGTON, D.C. 20566-0001

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September 3, 1998 Mr. John R. McGaha, Jr.

Vice President - Operations Entergy Operations, Inc.

River Bend Station 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. (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. EOl 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 through the rneasurement 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 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 identified in Generic Letter 92-08 for River Bend Station. We have further concluded that tne thermal mods! as currently implemented is not acceptable for ampacity assessments. 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 modelis not necessary for issue resolution. Due to the issues mised during this review, the subject safety evaluation (Enclosure 1) may be used in followup inspection. This completes our action under TAC No. MA2242.

Sincerely, O

/

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

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Mr. John R. McGaha Entergy Operations, Inc. River Bend Station ec:

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 l P. O. Box 220 Entergy Operations, Inc.

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

P. O. Box 1050  :

St. Francisville, LA 70775 Director- Nuclear Safety  ;

Entergy Operations, Inc.

President of West Feliciana River Bend Station Police Jury P. O. Box 220 P. O. Box 1921 St. Francisville, LA 70775 4 St. Francisville, LA 70775 i 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 Rose Drive P. O. Box 94095 i Baton Rouge, LA 70806 Baton Rouge, LA 70804-9095 Administrator Wise, Carter, Child & Caraway l Louisiana Radiation Protection Division P. O. Box 651 P. O. Box 82135 Jackson, MS 39205 Baton Rouge, LA 70884-2135 j l

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