ML20092B870

Responds to Generic Ltr 91-11, Resolution of Generic Issues 48, LCOs for Class 1E Vital Instrument Buses' & 49, Interlocks & LCOs for Class 1E Tie Breakers.'

ML20092B870
Person / Time
Site:	Comanche Peak
Issue date:	02/03/1992
From:	William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-GTECI-048, REF-GTECI-049, REF-GTECI-NI, TASK-A-48, TASK-A-49, TASK-OR GL-91-11, TXX-92055, NUDOCS 9202110163
Download: ML20092B870 (3)

Text

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L__. Log # TXX 920$5

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file # 10035 GL 91 11 C C 908.3 (clo)

Ref. # 10CfR50,$4(f) 7U!Il C/RIC 10CrR50.109(a)(6) w on.m J. r.hm J february 3, 1992 orm ncese.e.

U, S. Nuclear Regulatory Commission Attn Document Control Desk Washington, D. C. 20555

SUBJECT:

COMANCHE PEAK STEAH ELECTRIC STATION (CPSES) q.

DOCKET N05. 50-445 AND 50 446 RESPONSE TO GENERIC LETTER 91 11:

RESOLUTION Of GENERIC ISSUES 48, "LCOs FOR CLASS 1E VITAE INSTRUMENT BUSES," AND 49,

"!NTERLOCKS AND C0s FOR CLASS 1E TIE BRrAKERS" Gentlemen:

Generic Letter (GL) 91 11 requested that licensee s ensure that pl nt procedures include time limitations and surveillance requireeents for the following.

Otherwise, licensees are to provide adequate justification for why such procedures are not needed.

1. Vital instrument buses (typically 120 Vac busts),

2. Inverters or other onsite power sources to the vital instrument buses, and

3. Tie breakers that can connect redundant Class IE buses (ac or dc) at one unit or that can connect Class 1E buses betwein units at the same site.

GL 91-11 also states that recently licensed Westilghouse, Combustion Engineering and General Electric (BWR/6) plants have resolved these concerns by implementing the Standard Technical Specifications.

CPSES Unit 1 has a full power operating lycense and accompanying Technical Specifications. The CPSES Technicel Sperifications are based on the Westinghouse Standard Technical Specifica~tions. As specified in GL 91 11, implementation of the Westinghouse Standard Technical Specification resolves Generic Issues 48 and 49 and therefore satisfies the requirements of this generic letter. In addition. TU Electric has procedures in place to ensure that the surveillance requirements of the Technical Specifications are met.

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. 4 TXX 92055 Page 2 of 2 CPSES Unit 2 is still in the construction phase, When licensed TV Electric is proposing a dual Unit Teibnical Specifications based on the Unit 1 Technical Specifications. Therefor,, the above response also applies to Unit 2.

Sincerely, ll'i g'!.

William J. Caiill. Jr.

VPC/gj Attachment c Mr. R. D, Martin Region IV Resident Inspectors. CPSES (2)

Mr. T..A. Bergman, NRR Hr. H. B, Fields NRR i

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Attachment to 1XX 92055 ,

Page 1 of 1 tlNillD ST Alls Of AHLRICA NUCLEAR REGULATORY COMMISSION in the Matter of )

)

Texas Utilities Llectric Company ) Doc 6 et Hos. 50 445 i

) and 50 446 (Comanche Peat Steam Electric )

Station. Unit 1 & 2) )

ALLIUlli William J. Cahill, Jr. being duly sworn, hereby depotes and says that he is Group Vice President, Nuclear of 10 Electric, the lead applicant herein that he is duly authorized to sign and file with the Nuclear Regulatory Commission this retponse to Generic Letter 91 11 for the captioned f acility: that he is familiar with the content thereof: and that the matters set forth therein are t rue and correct to t he best of his knowledge, information and belief, s- $ //sp /2 William J, Cahlff, Jr.

Grcup Vice President Nucle ar /7' STATE Of TEXAS )

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COUNTY Of DAl!As )

Subscribed and sworn to before me, on this _. 3rd day of resruniv , 1992.

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