TXX-4552, Interim Deficiency Rept SDAR-190 Re Inadequate Consideration of Nonseismic to Seismic Effects in Architectural Features Design.Engineering Program Established Involving Field Verification & Damage Study Evaluation

Interim Deficiency Rept SDAR-190 Re Inadequate Consideration of Nonseismic to Seismic Effects in Architectural Features Design.Engineering Program Established Involving Field Verification & Damage Study Evaluation

ML20205C586
Person / Time
Site:	Comanche Peak
Issue date:	09/12/1985
From:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Hunter D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
SDAR-190, TXX-4552, NUDOCS 8509230050
Download: ML20205C586 (2)

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w w w o.cous a September 12, 1985 TXX-4552 Mr. D.R. Hunter, Chief Reactor Project Branch 2 U.S. Nuclear Regulatory Cnmmission Office of Inspection & Enforcement 611 Ryan Plaza Drive, Suite 1000 Docket Nos.: 50-44E Arlington, TX 76012 50-446 COMANCHE PEAK STEAM ELECTRIC STATION DESIGN OF ARCHITECTURAL FEATURES QA FILE: CP-85-29, SDAR-190 FILE N0.: 10110

Dear Mr. Hunter:

In accordance with 10CFR50.55(e), we are submitting the enclosed written report of actions taken to correct a deficiency regarding inadequate con- I sideration of non-seismic to seismic interaction effects in the design of architectural features.

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

Very truly yours,

/ 0 W.G. Counsil WGC:mim Attachment cc: NRC Region IV - (0 + 1 copy)

Director, Inspection & Enforcement (15 copies)

U.S. Nuclear Rsgulatory Corrmission Washington, D.C. 20555 8509230050 850912 PDR ADOCK 05000445 S PDR

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TXX-4552 9/12/85 Page 2 ATTACHMENT DESIGN OF ARCHITECTURAL FEATURES Description During a review performed in support of the NRC Technical Review Team (TRT) effort, the effects of non-seismic to seisnic interactions were observed to be inadequately considered in the design of architectural features.

Subsequent engineering evaluations indicate the integrity of the mounting of these installations could not be assured during a seismic event.

Architectural features include such items as metal floor plates, handrails, grating, masonry and drywall installations, and doors. The function of these items is related to personnel access and other non-operating activities.

Structural failure of these features could, however, adversely affect the function and operability of safety-related equipment.

Safety Implications In the event the conditions had remained undetected, the operability of equipment essential to safe plant operation could not be assured during or after a seismic event.

Corrective Action An engineering program has been procedurally established involving field verification and damage study evaluation. The results of this program will include an assessment of each architectural feature including an approved modification to provide adequate seismic restraint or an accep-table interaction.

Engineering activities for Unit 1 and 2 are currently scheduled for com-pletion in October, 1985. Construction activities will be completed prior to fuel load. Unit 2 activities will be accomplished in accordance with the project construction schedule.

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