ML20062E627

RO 78-31/4P:river Water Temp Change Exceeded Tech Spec Limits.Caused by Low Inlet Temp & High Ambient Temp & Relative Humidity,Resulting in Inability of Mechanical Draft Cooling Towers to Cool Discharge Water Properly

ML20062E627
Person / Time
Site:	Three Mile Island
Issue date:	12/05/1978
From:	Seelinger J METROPOLITAN EDISON CO.
To:
References
NUDOCS 7812110146
Download: ML20062E627 (1)

Text

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S Meopeditan Edierwi Compeny

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h, J ,gp Post (rtin. Ram 40'J r.netterm.,. p.nem;wda 11057 it7 ps.t int t 5 Decenher l'J78 Mr. Hoyce II. Crier

'iffice of inapection & Enforcement, Region I Nucicar Regulatory Consission 631 Park Avenue King of Pruasia, Penna. 19406 -

Operating License DPR-50 Docket 50-289

Subject:

Reportable occurrence i;o . 78-31/4P

Dear fir. Grier,

This telegram is t o confirm the telecon betvcen Mr. Richard Keiming, Region i ImC, and Mr. J. L. Seelinger, TMI-I Superintcndent, at 1645 hours0.019 days <br />0.457 hours <br />0.00272 weeks <br />6.259225e-4 months <br /> on Decccher 4, 1018.

A violation of the T.nviroicstntal T chnical Specification 2.1.b.1 occurred between 0935 and 1205 hours0.0139 days <br />0.335 hours <br />0.00199 weeks <br />4.585025e-4 months <br /> of December 4 l'J78 as the station River NaLer

• al exceeded + 120r. by 20F.

s It is noted that the 'ntI-II Environ:nental Technical Specilication 3.1.1.a.(1) l use also violat.*d by 20F. during this period but since the reporting ,

raquirenents of the TMI-I Technical Specifications (IS 5.6.2.3) are more l irai t i n;;, this notification and anhe-cuent written report shall also satisfy the TMI-II reporting raquire-ant (r.75 5.6.7.b).

the inlet River Unter Temperature at the time of the incident was 42 F. and the anbient air re::perat ure uns 61 F. with a relative hutsidity of nearly .

100). Ahope conditions of low inlet tenpereture and high or.bient t etsperatur e and high reistive hursidity resulted in the inability of the !!cchanical Draf t Ccoling Towers (MDCT) to adequately cool the discharge water. The MDCT fans and punpc had been accured carlier since they ocgan adding heat to the river water rather than cooling it. The 12 F. t.T limit was exceeded for approxicately 2.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> with a maxinues aT of 140 F.

'this indic nt vill be revicurd to determine if .any further ter rective action can be taken to prevent future occurrenece.

l 1

1 'ery rul yours,

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78121101 T(o J . i. : s. neer O l

mI-I Superinte dont l

J1.S : s tes 3

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