ML19210B345

Environ Incident 75-09:on 751113,temp Differential Between Inlet & Discharge Temp Changed at Rate Exceeding 2 F/H. Caused by Operator Deficiency.Plant Operating Procedures to Be Reviewed

ML19210B345
Person / Time
Site:	Three Mile Island
Issue date:	11/14/1975
From:	Colitz J METROPOLITAN EDISON CO.
To:
Shared Package
ML19210B344	List: ML19210B343 ML19210B345
References
NUDOCS 7911070603
Download: ML19210B345 (2)

Text

- .

- . s

./fBf/7,:::r;LT '

.: E Z _ _

METROPOLITAN EDISON COMPANY sunstoraaroretusaavusucununescaaronariou _ .

POSTCFPLCE SOX 480 M(OOLETOWN. PENNSYLVANIA 17067 TELEPt10NE717-944-4041 b4 Novenser 14, 1975

,,s . . l . :' '.:.

Mr. J. P. O'Reilly Sinctor .~ , I"'

Directorate of Regulatory Operations

~

Region 1 -

631 Park Avenue -

King of Prussia, Pennsylvania 19406 Operating License DPR-50 -

Docket 50-289

. St!BJECT: Environmental Incident No. EI 75-09

Dear Mr. O'Reilly:

This tele (Region I-NRC)and gram G.isA.toKunder confirm(Unit the telecon between I Supervisor i.ec Spessard of Operatl1ons.

Three Mile Island Nuclear Station) at 1900 Hours.13 November 1975.

Violation of the Environmental Technical Specification 2.1.b.(2)

. . . 111 that the terperature differential between inlet and discharge temperatum changed at a rate in excess of 2*F/hr.

. Review of the effluent temperature and a T recorder indicated

,. that during the one (1) hour period. 0650 to 0750 hours0.00868 days <br />0.208 hours <br />0.00124 weeks <br />2.85375e-4 months <br />, the net change in effluent temperature was.3*F which was l'F/hr. in excess of the limit of 2*F/hr. -

. The plant was in the cooldown mcde and the decay heat system was placed into service iceediately prior to the occurrence. The additional

l heat load imposed on the effluent water was not monitored closely i enough by the operator and the late untimely response of adjusting the Mechanical Draft Cooling Tower fan combination to compensate for the temperature change resulted in exceeding the 2*F/hr. limit.

Plant operating procedures will be reviewed to determine if additional guidance is necessary to assure personnel are more rigorously 1547 359 i . ... ,. - . . , .. .. -- . - -

~

gooro3~

P00R ORGINAL

. .~.

Mr. J. P. O'Reilly. Director November' 14. 1975 go observant of the adverse trends in effluent temperature.

Very truly yours.

. . Colitz Unit I Superintendent Three Mlle Island Nuclear Station JJC/ pas i

e

~ '

1547 360 De 100R OR 8 hA. .

p- <- e. _ . , , .

.jn . ,

.a - . c. :r e x . . . , ,3 -

__ .y -

l - t; . ,

.p -

s lv,. m ..

g;

,. ,l . f

- r-

. e p .. .

,Y

, , . . ,1 l

I; . I'- , i

>* $ o ' ,e - s', ,

,' . t..

i

. .. . ,. c -

- 2 t . ,

k,' k.I

,i,' s >

k i '4 a., s (

, - . ,s e ,. .

1

. '~ s r,

r. .  :. .

-1

.t.f ,

,  ?, .. .

"~

. ;i. ..,.

.