ML20094P419

Forwards Nucon 06TU935/01, Pyrolysis Gas Chromatography Analysis of 10 Thermo-Lag Fire Barrier Samples

ML20094P419
Person / Time
Site:	Comanche Peak
Issue date:	11/22/1995
From:	Terry C TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20094P422	List: ML20094P419 ML20094P423
References
GL-92-08, GL-92-8, TAC-M85536, TAC-M85537, TXX-95291, NUDOCS 9511290138
Download: ML20094P419 (4)

Text

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_N Log # TXX-95291 llllllll' 'llllllll Fi1e # 10010 909.5 E

E Ref. # GL 92-08 4

1UELECTRIC November 22, 1995 Grav Vke President U. S. Nuclear Regulatory Commission Attn: Document Control Room Washington. D.C. 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) - UNIT 1 DOCKET N0. 50-445 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION FOLLOW UP TO GENERIC LETTER 92-08 (TAC NOS. M85536 AND 85537)

REF:

1)

NRC Letter dated May 17. 1995. from Mr. Timothy J. Polich to Mr. C. Lance Terry 2)

TV Electric Letter logged TXX-95136 dated August 8.1995.

from Mr. C. Lance Terry to NRC I

Gentlemen:

Reference 1 requested that Texas Utilities Electric Company (TV Electric) provide additional information regarding Thermo-Lag fire barrier material received and installed at CPSES. In Reference 2. TU Electric responded to that request.

Via Reference 2. TU Electric stated that, it does not believe that there is a technical or regulatory bases for requiring any further chemical sampling to support the acceptability of the Thermo-Lag installed at CPSES Units 1 and 2 as qualified fire barriers. Nonetheless. TV Electric, in response to suggestions from the NRC and to support the industry in its response to this aspect of the qualification of Thermo-Lag, decided to participate in the NEI test program to assess the chemical formulation of Thermo-Lag. In this respect TV Electric provided 10 samples to the Nuclear Energy Institute (NEI) endorsed program to perform the chemical analysis.

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TXXs95291, Page-2 of 3 J

The NEI program' consisted of Pyrolysis Gas Chromatography (PGC) with Mass Selective Detection (MSD) of 169 samples from the participating utilities to assess organic composition, and Energy Dispersive X-Ray Spectroscopy of 33 samples to assess inorganic. chemical composition. On the basis of these tests, the test 1ab. NUCON.In_ternational. Inc..' concluded that all samples contained the

. constituents. identified by Thermal Science Inc., as essential to fire barrier-performance. NUCON also determined that the composition of the sample population was consistent. A copy of_the summary report has been provided to the NRC by NEI.

The TU Electric samples were consistent with the other utility samples. A copy of the_ summary pages from the NUCON report for TV Electric samples are _ contained in to this letter.

. The NUCON test-results indicate that 8 of the 10 Thermo-Lag samples are consistent.

in terms of chemical composition to other Thermo-Lag samples tested as part of the NEI generic testing program. The remaining 2 samples labeled as "Flexi-Blanket" were not consistent with the other Thermo-Lag [ supplied by other Utilities]

samples. Per discussions with NUCON and review of the NUC0N test report issued for TV Electric, it was concluded that: "Flexi-Blanket" (product name 330-660) is similar in composition and in the same product family. However, proportions of the ingredients used in the "Flexi-Blanket" are different than the Thermo-Lag base material (product name 330-1), the chemical composition of these two samples of

" Flex 1-Blanket material are consistent with the expected values for the product name 330-660 material, The NEI generic testing program did not involve "Flexi-Blanket" samples from other utilities and this accounts for the sample

, inconsistencies identified by the independent laboratory (NUCON).

As stated in Reference 2. TU Electric performed its own tests, under the auspices of its Quality Control program using Infrared Spectroscopy method. Ten samples of Thermo Lag material were analyzed using Fourier Transform Infrared spectroscopy (FTIR). These samples were obtained from various locations of the plant. Based on l

FTIR testing, the samples are the same basic product formulation.

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h TXX-5291 Page 3 of 3 t

If you have any questions regarding the information in the attachment, please i

contact Obaid Bhatty at (817) 897-5839.

i Sincerel,

C, L. Ter OB/ob Attachment c - Mr. L. J. Callan, Region IV Mr. W. D. Johnson, Region IV Mr. K. S. West, NRR Mr. T. J. Polich, NRR Mr. W. H. Rasin, NEl Resident Inspectors

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f-ATTACHMENT 1 TO TXX 95291 i

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Summary Pages from NUCON International, Inc. Test Report of Comanche Peak Steam Electric Station's Thermo-Lag. Chemical Samples I

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