ML19327C218

Supplemental Deficiency Rept CP-87-064 Re Design Basis Tornado Analysis for safety-related Equipment.Initially Reported on 880120.Tornado Venting Analyses Completed. Actions Will Be Completed Prior to Unit 1 Fuel Load

ML19327C218
Person / Time
Site:	Comanche Peak
Issue date:	11/15/1989
From:	William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CP-87-064, CP-87-64, TXX-89751, NUDOCS 8911210198
Download: ML19327C218 (2)

Text

g -

e --

q 33 >

3 h 9'- ,

) H

""ll Log # TXX-89751 )

g:( O. C File # 10110 1

~

a C C 903.3 i MlELECTRIC Ref. # 10CFR50.55(e) ]

l November 15, 1989 cmuw m em*,n U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 i

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50 445 AND 50 446 DESIGN BASIS TORNADO (DBT) ANALYSIS FOR SAFETY-RELATED EQUIPMENT '

SDAR: CP-87 064 (SUPPLEMENTAL REPORT) s Gentlemen: f On January 20, 1988. TV Electric letter logged TXX-88086, notified you of' a

' reportable deficiency involving the design basis tornado (DBT) analysis -for safety-related equipment. The last report on this item was logged TXX-89285, ,

dated May 19, 1989.. The purpose of this report is to clarify and update the t status of the corrective actions being implemented.

The Unit 1 equipment evaluations and resulting rework referred to in +

TXX-89285, have been completed. In addition, an operating procedure was modified to ensure that appropriate operator action is taker during a tornado watch or following a DBT.

TXX-88086 stated that the tornado venting analysis validation for safety-related structures was complete. Subsequent equipment valioation for safety-related structures indicated a need for refined tornado transient analyses for some structures. All tornado venting analyses for safety-related equipment and structures have now been completed for Unit I and Common. .t TXX-88086 also stated that future procurement of safety-related components '

would be in accordance with the tornado design criteria delineated in Design  ;

Basis Document DBD-ME-009, " Design Basis Tornado Analysis." TV Electric subsequently determined that the requirements of DBD-ME-009 were not being effectively implemer.ted during the procurement process. Consequently, a '

Corrective Action Request (CAR) was issued. As a result of the CAR, appropriate ' actions (including the revision of other DBD's) are being taken to

. ensure that affected equipment or components procured since the issuance of TXX-88086 are adequate to withstand the effects of the DBT. and that future i

8911210198 891115 5 ADOCK 0500

{DR f52'1 400 North Olive Street LB. 81 Dallas, Texas 75201

fl;> ..

L e TXX-89751 November 15, 1989 Page 2 of 2 procurement activities properly consider the DBT design criteria. These '

actions will be completed prior to fuel load for Unit 1. Unit 2 corrective actions will be assessed upon resumption of the balance of Unit 2 engineering p,

activities.

Sincerely, William J. Cahill, Jr.

L CBC/cp c Mr. R. D. Martin, Region IV Resident inspectors. CPSES (3) a v

l l

i l

. - . . . -