ML20148G081

Final Deficiency Rept CP-87-100 Re Containment Piping Penetrations.Initially Reported on 871201.Requirement to Provide Adequate Overpressure Protection for Containment Penetration Added to Design Basis Document DBD-ME-013

ML20148G081
Person / Time
Site:	Comanche Peak
Issue date:	01/20/1988
From:	Counsil W, Woodlan D TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CP-87-100, TXX-88110, NUDOCS 8801260403
Download: ML20148G081 (2)

Text

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Log # TXX-88110

-- File # 10110 C

C-906.2 Ref. # 10CFR50.55(e) nlELECTRIC II,D.7,5N,",$,, January 20, 1988 V. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION DOCKET N05. 50-445 AND 50-446 CONTAINHENT PIPING PENETRATIONS SDAR: CP-87-100 (FINAL REPORT)

Gentlemen:

On December 1, 1987, we notified you via TXX-6955 of an issue reportable under the provisions of 10CFR50.55(e) involving the lack of overpressure protection for three containment penetrations. This is our final report on this issue, which we are submitting to provide the preventive and corrective actions.

We have completed our evaluation of all other containment piping penetrations, and have determined that fourteen (14) additional penetrations have the potential for overpressurization. The remaining penetrations have acceptable overpressure protection.

The three penetrations identified in our last report (TXX-6955) have been corrected with the addition of thermal relief valves. Of the fourteen additional penetrations, ten (10) will be corrected by the addition of thermal relief valves. Design Change Authorizations have been issued to perform these corrections. The remaining four (4) will be corrected by instituting administrative procedures to drain the isolated portions of piping following normal plant operations requiring use of the penetrations. These four penetrations are normally isolated and remain isolated during accident conditions. Therefore, maintaining these penetrations dry will eliminate the potential for overpressurization. Appropriate changes will be made to the FSAR to recognize these dry (drained) penetrations.

To prevent recurrence of th k condition, the requirement to provide a.! equate overpressure protection for containment penetrations under accident conditions has been added to Design Basis Document DBD-ME-013. "Containment Isolation."

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o 400 krrh Olne Sirret LB 81 Dalla. Texas 75.'01

TXX-88110 January 20, 1988 Page 2 of 2 The piping modifications and procedure changes noted above will be completed by December 16, 1988. Records supporting our corrective action implementation will be available for your inspectors' review af ter this date.

Very truly yours,

. lo<

W. G. Counsil By:

D. R. Woodlan '

Supervisor, Docket Licensing BSO/grr c-Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3)