ML18022A964

Provides Update on Review Process & Approach to Resolving Concerns W/Mechanical Properties of Thermo-Lag Fire Barriers,In Response to GL 92-08

ML18022A964
Person / Time
Site:	Harris
Issue date:	08/31/1995
From:	Robinson W CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-92-08, GL-92-8, HNP-95-075, HNP-95-75, HO-951155, NUDOCS 9509060381
Download: ML18022A964 (6)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

Y ACCESSION NBR:9509060381 DOC.DATE: 95/08/31 NOTARIZED: YES DOCKET g FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina 05000400 P AUTH. NAME ,AUTHOR AFFILIATION ROBINSON,W.R. Carolina Power E Light Co.

RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

I

SUBJECT:

Provides update on review process 6 approach to resolving concerns w/mechanical properties of Thermo-Lag fire barriers.

DISTRIBUTION CODE: A029D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: Generic Letter 92-008 Thermal-Lag 330 Fz.re Barrier '5 NOTES:Application for permit renewal filed. I RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-1 LA 1 0 PD2-1 PD 1 1 LE,N 1 1 INTERNAL ILE C T 01 1 1 NRR/DE/EELB 1 1 PD3-1 1 1 NRR/DS SA/S PLB 2 2 RGN2 ..-.FILE 1 1 EXTERNAL: NOAC 1 1 NRC PDR 1 1 D

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NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM OWFN 5DS (415-2083) TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON AT NEED)

TOTAL NUMBER OF COPIES REQUIRED: LTTR 11 ENCL 10

Carolina Power & Light Company William R. Robinson PO Box 165 Vice President New Hill NC 27562 Harris Nuclear Plant AUG 31 1995 File Number: HO-951155 SERIAL: HNP-95-075 United States Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NO. 50-400/LICENSE NO. NPF-63 SUPPLEMENTAL RESPONSE TO GENERIC LETTER 92-08, THERMO-LAG 330-1 FIRE BARRIERS Gentlemen:

On March 23, 1995, Carolina Power 8c Light Company(CPAL) submitted the Shearon Harris Nuclear Power Plant (SHNPP) response to an NRC staff letter dated December 23, 1994 regarding NRC Generic Letter (GL) 92-08, "Thermo-Lag 330-1 Fire Barriers." In the response to Sections 1.a(9) and 1.c, regarding Thermo-Lag materials and mechanical properties, CP8cL committed to provide an update on the review process and our approach to resolving concerns with mechanical properties of the Thermo-Lag fire barriers. That update is provided below.

CP&L's approach to resolving concerns with Thermo-Lag mechanical properties utilizes two options. The option used is dependent upon the specific installed configuration and its potential interaction with safety related equipment.

The first option involves conducting a field walkdown of installed configurations.

During this walkdown, Thermo-Lag installation interactions with safety-related equipment are identified. Thermo-Lag installations identified as having no interaction with safety related equipment (in accordance with Regulatory Guide 1.29, Seismic Design Classification) will be accepted as-is. This determination, and its basis, will be O documented in an engineering evaluation. Based on walkdowns conducted to date, a

'<Q',OOC number of the installed Thermo-Lag installations at SHNPP may be dispositioned using Y)OfL) this option (primarily door transoms/mullions).

OO illlQ O'O For remaining installations, CPAL is pursuing site specific seismic testing.

tXt D Configurations within this category will be subjected to seismic shake tests which meet Y)D Oa I the requirements of IEEE-344, 1975, IEEE Recommeded Practices for Seismic NCC O Qualification of Class 1E Equipment for Nuclear Power Generating Stations. Worst case 0'K configurations considering such items as mounting, spans, weights, etc. and bounding lAA seismic levels that conform to the seismic design requirements of SHNPP's FSAR will 0 a.ut be used to test this Thermo-Lag population. From this testing, seismic qualification of State Road 1134 New Hill NC Tel 919362-2502 Fax 919362-2095 VGU f o

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Document Control Desk HNP-95-075 / Page 2 the installed configurations will be established. Based upon an initial review of available pertinent industry documentation (e.g., TVA Seismic Test Report) and scoping walkdowns conducted to date, CPEcL expects that the planned testing will provide the bases for acceptance of the remaining Thermo-Lag installations at SHNPP. In the event that seismic qualification of the existing configuration is not confirmed based on the seismic test results, the existing Thermo-Lag configurations will be modified to achieve seismic qualification or protective barriers will be erected.

As stated in our letter of March 23, 1995, completion of the overall Thermo-Lag issue will be accomplished by the end of Refueling Outage No.7. Refueling Outage No.7 is currently scheduled to commence in March 1997. The seismic qualification investigation described above will be incorporated into the overall Thermo-Lag resolution effort in a ma'nner that will maintain this committed schedule.

Questions regarding this matter may be referred to Mr. T. D. Walt at (919) 362-2711.

Sincerely, SDC/sdc Mr. W. R. Robinson, having been first duly sworn, did depose and say that the information contained herein is true and correct to the best of his information, knowledge and belief; and the sources of his information are officers, employees, contractors, and agents of Carolina Power 2, Light Company.

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