TXX-4349, Interim Deficiency Rept SDAR-157 Re Defective Architectural Wall Located Above Control Room.Wall Being Removed.Seismic Design Const & Insp Activities for New Separation Wall Scheduled for Completion by 841215

Interim Deficiency Rept SDAR-157 Re Defective Architectural Wall Located Above Control Room.Wall Being Removed.Seismic Design Const & Insp Activities for New Separation Wall Scheduled for Completion by 841215

ML20108C541
Person / Time
Site:	Comanche Peak
Issue date:	11/05/1984
From:	Clements B TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Hunter D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
SDAR-157, TXX-4349, NUDOCS 8411160609
Download: ML20108C541 (2)

Text

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TEXAS UTILITIES GENERATING COMPANY MKYWAY TOWEH

• 400 NottTH OLIVE MTHEET, L.H. 881

• IBA LLAM, TEXAM 7 3 2498 m.E'.';';IJdJfJ.!5_ November 5, 1984 TXX-4340'

}B@ M OMM NOV - 61984 Mr. D.R. Hunter, Chief Reactor Project Branch 2 -

j U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement 611 Ryan Plaza Drive, Suite 1000 Docket No.: 50-445 Arlington, TX 76012 COMANCHE PEAK STEAM ELECTRIC STATION CONTROL ROOM SEPARATION WALL QA FILE: CP-84-31, SDAR-157 FILE N0.: 10110

Dear Mr. Hunter:

In accordance with 10CFR50.55(e), we are submitting the enclosed report of actions taken to correct a deficiency with the architectural wall located on the mezzanine floor at Elevation 840 above the Control Room. It was reviewed by Damage Study for interaction wita safety-related components during a seismic event. Due to the wall being architectural and designed non-seismic, unacceptable interactions could possibly occur.

Supporting documentation is available at the CPSES site for your Inspector's review.

Very truly yours, i

BRC:tig Attachment cc: NRC Region IV - (0 + 1 copy)

Director, Inspection & Enforcement (15 copies)

U.S. Nuclear Regulatory Commission Washington, DC 20555 hkbo S

o s mvsasos or ruus erss.srusa usernue vous.,ur .

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TXX-4349 November 5, 1984 ATTACHMENT Control Room Separation Wall Description During an engineering review, an architectural wall was reviewed for interactions with safety-related components. The wall, a standard drywall installation with multiple layers of gypsum board, is located on the mezzanine floor (Elevation 840') above the Control Room. Viewing glass for the observation deck is supported in the wall.

Site engineering has concluded the structural adequacy of the wall during SSE is indeterminate. In_ order to expedite resolution of the concern, the wall will be replaced.

Safety Implications <

In the event the condition had remained undetected, failure of the wall could adversely affect safety-related systems, components and operator actions under accident conditions.

Corrective Action The wall is currently being removed. Seismic design, constrection and inspection activities for the new separation wall is scheduled for completion by December 15, 1984