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:	Crane
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

. l. :' '.:.

,,s.

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:

(Region I-NRC) gram is to confirm the telecon between i.ec Spessard This tele and G. A. Kunder (Unit I Supervisor 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

P00R ORGINAL gooro3~

~

.~.

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 100R OR 8 hA.

De

p-

.jn.

.a

. c.

r e x...,,3 -

.y -

e.

l

- t;

.p s lv,.

,l r-m f

g; e

p..

,Y

,1 l

I; I'-

i

',e -

s',

i o

. t..

,. c 2

k,'

k.I t

,i,'

s k

i

'4 a

(

s

-.,s r,

1

'~

s e

r.

.t.f

-1

"~

?,

. ;i.

.