TXX-7046, Interim Deficiency Rept CP-87-55 Re Containment Spray Pump Recirculation Piping.Initially Reported on 870805.Piping Wil Be Replaced W/Asme III Class 2 Pipes W/Seismic Category I Supports.Next Rept Will Be Submitted by 880311

Interim Deficiency Rept CP-87-55 Re Containment Spray Pump Recirculation Piping.Initially Reported on 870805.Piping Wil Be Replaced W/Asme III Class 2 Pipes W/Seismic Category I Supports.Next Rept Will Be Submitted by 880311

ML20236Y036
Person / Time
Site:	Comanche Peak
Issue date:	12/08/1987
From:	Counsil W, Woodlan D TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CP-87-55, TXX-7046, NUDOCS 8712110046
Download: ML20236Y036 (2)

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== Log # TXX-7046 L J File # 10110 906 3 7UELECTRIC Ref. # 10CFR50.55(e) wmiam c. couam December 8, 1987 Esecume Vwe Presiderrt U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 AND 50-446 CONTAINMENT SPRAY PUMP RECIRCULATING PIPING SDAR: CP-87-55 (INTERIM REPORT)

Gentlemen:

On August 5, 1987, we verbally notified your Mr. H. S. Phillips of deficiencies involving the containment spray pump recirculation piping. Our latest interim report was logged TXX-6973 dated November 20, 1987. We have concluded this issue is reportable under the provisions of 10CFR50.55(e). The required information is as tollows.

Description The containment spray pump discharge minimum flow recirculation lines, downstream of the motor operated recirculation line isolation valves, were designed and installed as non-nuclear safety (NNS) class 5 seismically supported piping. This piping provides minimum cooling flow for the containment spray pumps after the pumps have started but before spray commences. Once containment spray has commenced, the recirculation path is automatically isolated. The FSAR and ANSI N18.2 require this piping be designed and installed in accordance with ASME B&PV Code Class 2.

Safety implications failure of this piping could result in the loss of the refueling water storage tank (RWST) water inventory necessary for containment spray and safety injection. This issue is a safety concern because the containment spray system prevents containment overpressurization during a LOCA or MSLB (inside containment). In the event this condition has remained undetected and had this piping failed concurrently with a LOCA or MSLB, the safety of plant operations could have been adversely affected.

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TXX-7046 December 8, 1987 Page 2 of 2 Corrective Action All affected piping will be replaced with ASME 111 Class 2 pipe with seismic Category I supports.

A schedule for completion of the above corrective action will be contained in our next report, which will be submitted no later March 11, 1988.

Very truly yours, 6). C . CeU W. G. Counsil By: A U. R. Woodlan Supervisor, Docket Licensing JCH/grr c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) l l

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