ML20128A259
| ML20128A259 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/25/1992 |
| From: | Brian Holian Office of Nuclear Reactor Regulation |
| To: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| Shared Package | |
| ML20127F509 | List: |
| References | |
| TAC-M83330, NUDOCS 9212030260 | |
| Download: ML20128A259 (3) | |
Text
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UNITED STATES
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4 NUCLEAR REGULATORY COMMISSION j
e-WASHINoTON D. C. 20655 7,
jNovember 25, 1992
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Docket Nos. 50-445 and 50-446 Mr.Williamd.Cahill,Jr.
. Group Vice President, Nuclear TV Electric 400 North Olive Street, L.B. 81 Dallas, Texas 75201
Dear Mr. Cahill:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION'- COMANCHE PEAK STEAM ELECTRIC STATION, THERMO-LAG (TAC NO. M83330)
The NRC staff completed a review of TV Electric's submittal dated September 24,1992, " Confirmatory Testing of Thermo-Lag Fire Barrier System at CPSES," and informed'you of the results-of our review of your criteria-by letter of October 29,1992. Coincident with the staff review of your proposed-fire barrier testing acceptance criteria, the staff was made aware of-.a potential concern regarding delamination and porosity of Thermo-Lag material (Enclosure 1, memorandum documenting telecon; and Enclosure 2,- letter _from Thermal Science, Inc. dated November 7, 1992). As stated in our letter of:
October 29, 1992, final staff _ acceptance of your fire barrier-acceptance testing will be documented in 'a future safety evaluation. The purpose of this letter is to request additional information to assist in this review.
You are requested to respond in writing to the following-questions:
1.
What action was taken to-onsure that material tested is _ representative of material currently installed in Units 1 and 27 Will the_same controls used for procuring material for the' current; testing:be used for future in-plant configurations and upgrades?
2.
Describe the quality controls used in-purchasing the Thermo-Lag material.
What type of receipt inspections are performed? ProvideLthis information for both~ units'and for various Thermo-Lag materials including preshaped conduits, preformed panels,. trowel grade material, and stress skin, Include a description _of any changes =which have occurred in your program.
~e Also, include an assessment of your confidence level that-material already.
in-plant will perform at acceptable. levels as compared to the test results.
3.
To what extent have delamination and porosity problems. appeared in conduit sections received at CPSES? What measures have been taken to ensure that conduit ' sections with voids, that have been repaired, are qualified for use at'CPSES?
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Mr. William J. - Cahill,' Jr.-
- 4.
What has been the historical " reject rate" of Thermo-Lag material received on-site? Has this rate increased recently as a result of the porosity and delamination problems described above, or as a result of_ the " stapling" issue, as discussed on-site during the November 5, 1992 management meeting. Describe the reject rate experienced for material used for the current test program, by type of material (e.g., conduit sections, preformed panels). Describe how the test configurationi results will bound in-plant use of the Thermo-Lag material, including past, current, and future installations.
The reporting requirements contained in this letter affect fewer than ten respondents, therefore OMB clearance is not required under Pu?lic Law 96-511.
We request your response to the enclosed items within 30 days,i receipt of this letter to enable the staff to complete its review in-a timely manner.
Sincerely, Original Signed By Brian E. Hollan, Senior Project Manager Project Directorate IV Division of Reactor Projects III/IV/V Office'of Nuclear Reactor Regulation
Enclosures:
1.
Documentation of Telecon, dtd 10/21/92 2.
Letter from Thermal Science, Inc., dtd 11/7/92 cc w/ enclosures:
See next'page DISTRIBUTION:
. Docket File EJordan NRC/PDR ACRS(10) local PDR WRussell PDIV-2/RF FMiraglia PDIV-2 PF AThadani JRoe GMulley, EW-542 MVirgilio EPaulik, RGN-III RArchizel LPlisco EPeyton
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Mr. William' J 1 Cahill, Jr.-.
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' cc w/ enclosures:
- Senior Resident Inspector Jack-R. Newman, Esq.--
^U.S. Nuclear Regulatory Comission Newman & Holtzinger P. 0. Box'1029-1615 L Street.:-N.W.-
a Granbury. Texas 76048 Suite 1000 Washington.. D.:C.
20036 Regional Administrator,= Region IV U.S. Nuclear Regulatory Commission Chief, Texas Bureau of Radiation Control:
611 Ryan Plaza Drive, Suite 1000 Texas Department of Health Arlington, Texas 76011 1100 West 49th Street Austin, Texas -78756 Mrs'. Juanita Ellis, President Citizens Association for Sound Energy Honorable Dale McPherson
~
1426 South Polk County Judge Dallas, Texas 75224 P. O. Box 851 Glen Rose, Texas 76043-Owen L. Thero, President
- Quality Technology Company Mr.. Mark 0. Medford:
Lakeview Mobile Home Park, Lot 35 Vice-President, Nuclear Assurance, 4793 East Loop 820 South Licensing and Fdels Fort Worth, Texas 76119 3B~ Lookout Place 1101 Market Street Mr. Roger D.-Walker, Manager Chattanooga, Tennessee-3740?-2801 Regulatory Affairs-for Nuclear Engineering Organization Mr. Biff Bradley-Texas Utilities-Electric Company NUMARC-
' 400 North Olive Street, L.B. 81 1776 I Street, N.W.
Dallas, Texas 75201 Washington, D.C.
20006
-Texas' Utilities Electric Company
- c/o Bethesda _ Licensing 3 Metro Center, Suite 610 Bethesda, Maryland -20814 William A. Burchette, Esq.
Counsel for Tex-La Electric Cooperative of Texas-Jorden, Schulte, & Burchette 1025 Thomas Jefferson-Street, N.W.
-Washington, D.C.
20007
- GDS Associates, Inc.
Suite 720' 1850 Parkway Place
' Marietta, Georgia 30067-8237 4
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