ML17332A954

NPDES Noncompliance Notification:On 950831,determined That Discharge from Outfall 00C (Heating Boiler Blowdown) Exceeded Concentration of Monethanolamine Submitted in NPDES Application Due to Valve Being Aligned in Open Position

ML17332A954
Person / Time
Site:	Cook
Issue date:	09/07/1995
From:	Fitzgerald D INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	Morley F MICHIGAN, STATE OF
Shared Package
ML17332A953	List: ML17332A952 ML17332A954 ML17332A955
References
NUDOCS 9510060042
Download: ML17332A954 (2)

Text

Indiana Michigan Power Company Cook Nuclear Plant One Cook Place Bridg man. Ml 49106 616 465 590I PIP lNOIANA NlCHtmLN POWER Mr. Fred Morley, District: Supervisor Surface .Water Quality Division Michigan Department of Natural. Resources 621 North Tenth Street P. O. Box 355 Plainwell, MI 49080 September 7, 1995

Dear Mr. Morley:

Re: Cook Nuclear Plant NPDES Permit No. MI 0005827 The following notification is submitted p'er NPDES Permit MI 0005827, Part I. Section A. 15 (c).

On August 31, 1995 it was determined that the discharge from Outfall 00C (heating boiler blowdown) exceeded the concentration of monethanolamine (ETA) that was submitted in our NPDES Permit application. The actual concentration of ETA in the heating boiler blowdown to be 630 ppm, whereas the average ETA was'stimated concentration reported in the NPDES application was 15 ppm-This incident occurred when a valve connecting the chemical feed system to the heating boiler recirculation line was aligned in the open position. The open valve allowed the chemical feed tank to empty into the recirculation line and into the boiler.

An estimated 42 lbs. of ETA were discharged to the forebay. In perspective, our NPDES application estimated the amount of ETA discharged to the forebay as 639 lbs./year. This value was based on heating boiler runs of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> per day for 15 days per month, while the actual average runs have been less than two days per month in 1995. Therefore, the total amount of ETA discharged to the environment remains well below the estimated annual values. No adverse environmental or public health effects occurred as a result of this event;

'P510060042 951002 ,j PDR ADOt K 050003i5 PDR ',

J

~ ~

Page 2 Mr. Fred Morley NPDES Permit No. MI 0005827 The incident is being fully investigated. Based on the results of our investigation, actions will be taken to prevent recurrence.

you have any questions, please contact John

'hould Carlson, Cook Nuclear Plant, Environm'ental Supervisor at (616) 465-5901 ext. 1153, or me at (616) 466-2546.

Sincerely, D. M. Fi gerald Environmental, Safety E Health Superintendent.