ML20236M383

Interim Deficiency Rept CP-87-50 Re Abnormal Thrust Bearing Temps on Turbine Driven Auxiliary Feedwater Pump.Initially Reported on 870727.Evaluation Continuing.Next Rept Will Be Submitted by 880115

ML20236M383
Person / Time
Site:	Comanche Peak
Issue date:	11/06/1987
From:	Counsil W, Woodlan D TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CP-87-50, TXX-6931, NUDOCS 8711130110
Download: ML20236M383 (1)

Text

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Lo'g # TXX-6931 Fi1e # 10110

= = 910.4 RIELECTRIC Ref #10CFR50.55_(e)

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wimam c. omma November 6, 1987 l '

aunene%,a l

U. S' Nuclear Regulatory Commission

' ATTN: Document Control Desk 1 Washington, D.C. 20555 l 1

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) I DOCKET N05. 50-445 AND 50-446 j TURBINE DRIVEN AUXILIARY FEEDWATER PUMP BEARING TEMPERATURE SDAR: CP-87-50 (INTERIM REPCRV)

Gentlemen:

On July 27, 1987, we verbally notified your Mr. H. S. Phillips of a deficiency.

involving abnormal thrust bearing temperatures on the turbine driven auxiliary feedwater pump. This is an interim report of a potentially reportable item under the provisions of 10CFR50.55(e). Our latest interim report on this ,

issue was logged TXX-6681, dated August 31, 1987. l During startup testing of the Unit 1 turbine driven auxiliary feedwater aump (cpl-AFAPID-01), an abnormally high temperature was identified for the t1 rust bearing. The pump manufacturer (Ingersoll-Rand), contacted to. assist in determining the cause of the condition, indicated that the temperatures were-not uncommon to the specific pump model (HMTA) and appear to be the result of ,

[ improper Installation and centering of the rotating element. Further, the vendor has indicated a technical bulletin is being prepared to provide more specific installation instructions in the pump manual that would eliminate misinterpretations of the installation requirements or design criteria.

We are continuing our evaluation of this issue and anticipate submitting our next report by January 15, 1988. ,

Very truly yours, (d (9 W. G. Coun il

'8711130110 871106 PDR ADOCK 05000445.

g PDR- By. -

D. R. Woodlan Supervisor, Docket Licensing MCP/tgj c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) f l ' D

- M North Olise Street LB BI Dallas, Tctas 7.ODI L. '

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