ML20210R080

Forwards Request for Addl Info Re Bisco Electrical Penetration Seals & Namco Switches.Response Requested by 870209

ML20210R080
Person / Time
Site:	Comanche Peak
Issue date:	02/03/1987
From:	Noonan V Office of Nuclear Reactor Regulation
To:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
References
IEB-79-28, NUDOCS 8702170315
Download: ML20210R080 (6)

Text

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Docket Nos.:

50-445 and 50-446 Mr. W. G. Counsil-Executive Vice President Texas Utilities Generating Company 400 N. Olive Street,I., 8. 81 Dallas, Texas 75201

SUBJECT:

kE00EST FOR INFORMATION REGARDING BISCO El.ECTRICAI.

PENETRATION SEAL.S-AND NAMC0 SWITCHES (IEB 79-28)

Enclosed is a reauest for additional information on BISCO electrical penetration seals (See Enclosure 1) and NAMCO switches (IE8 79-28) ( See ).

Please respond by COB February 9, 1987. Should you have any questions, or need further clarification, contact Annette Vietti-Cook, Pro.iect Manager on telephone number (301) 492-8525.

Sincerely, b

Vincent S. Noonan, Director PWR Project Directorate No. 5 Division of PWR I.icensing-A

Enclosures:

1. Request For Information BISCO Electrical Penetration Seals

2. Request For Information NAMC0 Switches (IER 79-28)

Distribution D.

06J NRC PDR' 1.ocal PDR PD#5 Reading File V. Noonan 0GC-Bethesda E. Jordan 8702170315 870203

8. Grimes PDR ADOCK 05000445 J. Partlow 0

PDR 3

N. Thompson f

Pro.iect Manager M. Rushbrook ACRS (10)

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UNITED STATES I

8 NUCLEAR REGULATORY COMMISSION

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FC9 0 177 Docket Nos.:

50-445 and 50-446

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Mr. W. G. Counsil Executive Vice President Texas Utilities Generatino Company 400 N. Olive Street,l., B. 81 Dallas, Texas 75201

SUBJECT:

RE0 VEST FOR INFORMATION FEGARDING BISCO El.ECTRICAI.

PENETRATION SEAI.S AND NAMCO SWITCHES (IER 79-281 Enclosed is a request for additional information on 9I5C0 electrical penetration seals (See Enclosure 1) and NAMCO switches (IEB 79-78) ( See 1 Please respond by COR February 9, 1987. Should you have any questions, or need further clarification, contact Annette Vietti-Cook, Pro.iect Manager on telephone number (301) 492-8525.

Sincerely, j

ye:t

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.N

nan, rector

~PWR Pro.iect 31 recto ate No. 5 Division of PWR I.icensino-A a

Enclosures:

1. Request For Information BISCO Electrical Penetration Seals

? Request for Information NAMCO Switches (IE8 79-28) l

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W. G. Counsil Comanche Peak Steam Electric Station Texas Utilities Generating Company Units 1 and 2

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CC*

Nicholas S. Reynolds Esq.

Resident Inspector / Comanche Peak Bishop,l.iberman, Cook, Steam Electric Station Purcell & Reynolds.

c/o U.S. Nuclear Regulatory Commission 1200 Seventeenth Street, NW P. O. Box 38 Washington, D.C.

20036 Glen Rose, Texas 76043 Robert A. Wooldridge, Esq.

Regional Administrator, Region IV Worsham, Forsythe, Sampels &

U.S. Nuclear Regulatory Commission Wooldridge 611 Ryan Plaza Drive Suite 1000 l

2001 Bryan Tower Suite 2500 Arlington, Texas 76011 Dallas, Texas 75201 j

l.anny A. Sinkin Mr. Homer C. Schmidt Christic Institute l

Manager - Nuclear Services 1324 North Capitol Street Texas Utilities Generating Company Washington, D.C.

20002 Skyway Tower 400 North Olive Street,l..B. 81 Ms. Billie Pirner Garde Dallas, Texas 75201 Government Accountability Pro.iect Midwest Office Mr. Robert E. Ballard, Jr.

3424 N. Marcos I.ane Director of Projects Appleton, WI 54911 Gibbs and Hill, Inc.

11 Pen Plaza New York, New York 10001 David R. Pigott, Esq.

Orrick, Herrington & Sutcliffe 600 Montgomery Street Mr. R. S. Howard San Francisco, California 94111 Westinghouse Electric Corporation P. O. Box 355 Anthony 7. Roisman, Esq.

Pittsburgh, Pennsylvania 15230 Trial 1.awyers for Public Justice 2000 P. Street, NW Renea Hicks Esq.

Suite 611 Assistant Attorney General Washington, D.C.

20036 Environmental Protection Division l

P. O. Box 12548, Capitol Station Nancy E. Wiegers l

Austin, Texas 78711 Spiegel & McDiarmed 1350 New York Avenue, NW Mrs. Juanita Ellis, President Washington, D.C.

20005-4798 Citizens Association for Sound Energy 1426 South Polk Roy P. I.essy, Jr.

Dallas, Texas 75224 Wright & Talisman, P. C.

1050 Seventeenth Street, NW Ms. Nancy H. Williams Suite 600 CYGNA Washington, D.C.

20036-5566 101 Cal.ifornia Street San Francisco, California 94111

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Texas' Utilities Electric Company Comanche' Peak Electric Station Units 1 and 2-(

CC:

Resident inspector - Comanche Peak Joseph F. Fulbright c/o U.S. Nuclear Regulatory Commission Fulbright & Jaworski 1301 McKinney Street P. O. Box 1029 Granbury, Texas 76048 Houston, Texas 77010 Mr. John W. Beck

)

Vice President

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Texas Utilities Generating Company Skyway Tower 400 N. Olive Street,1.8#81 Dallas, Texas 75201 Mr. Jack Redding C/0 Datel Service Corp.

Texas Utilities Generating Company 7910 Woodmont Avenue, Ste. 208 Bethesda, Maryland 20814 William A. Burchette, Esq.

Counsel for Tex-l.a Electric Cooperative of Texas Heron, Burchette, Ruckert & Rothwell Suite 700 1025 Thomas Jefferson Street, NW Washington, D.C.

20007 GDS Associates, Inc.

2525 Cumberland Parkway Suite 450 Atlanta, Georgia 30339 Administrative Judge Peter Bloch U.S. Nuclear Regulatory Commission Washington, D.C.

20555 j

Elizabeth B. Johnson Administrative Judge Oak Ridge National I.aboratory P. O. Box X, Building 3500 q

Oak Ridge, Tennessee 37830 l

Dr. Kenneth A. McCollom 1107 West Knapp Stillwater, Oklahoma 74075 s

Dr.-Walter H. Jordan

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081 Outer Drive s

f Oak Ridge, Tennessee 37830 u

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i s

di 1.

Identify the location of the BISCO electrical penetration seals identified in NRC Inspection Report 85-16/85-13, Appendix C. Item 6 (penetration num-bers AB-790-174-1022A, EC-854-150A-1018A and B, EC-854-151A-2003A and 2004A, EC-854-1518-2025A and 20?6A, and TR-803-010A-1008A).

2.

Indicated _what redundant equipment / cabling for safe shutdown components would be affected in the event a fire were to spread from one area through the above penetrations to the ad.jacent area.

3.

What action has been taken to assure conformance of the above penetration seals with the specified three-hour fire ratinq'reauirement?

4 By letter dated September 10, 1986, TV Electric notified P:RC Region IV that the concern regarding RISCO fire seal qualification was determined not be reportable under 10CFR50.55fel. However, the letter does not provide details as to how the determination that, "The deficiency could not have adversely affected safe opefation of the plant if it had remained undetected," was made. Provide a technical basis for vour position with any necessary supporting documentation.

Enclosure.2

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,l 1.

In response to IEB 79-28, TUGC0 replaced NAMCO switches utilized in safety-related applications with new switches not subject to the j

failure mechanism addressed in the Bulletin. What are the safety-related functions performed by the switches that were replaced and.the consequence of.their failure?

2.

What were the administrative controls utilized to control the replacement

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of NAMCO switches in response to IEB 79-28?

3.

Today, on what basis does TUGC0 know that all defective NAMC0 switches have been replaced? Credit should be taken for any relevant CPRT activity such as ISAP VII.a.2 that has been performed to assess the adequacy of TUGC0's corrective action programs.

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