ML20091L300

NPDES Noncompliance Notification:On 801202,sample Drawn for Routine Weekly Coliform Analysis Indicated (on 801204) Concentration of Greater than 2,000 mpn/100 Ml.Caused by Unusually High Flow to Plant.Chlorine Tank Was Drained

ML20091L300
Person / Time
Site:	Calvert Cliffs
Issue date:	12/08/1980
From:	Russell L BALTIMORE GAS & ELECTRIC CO.
To:	Wigginton P MARYLAND, STATE OF
Shared Package
ML20091K978	List: ML20091K975 ML20091L030 ML20091L034 ML20091L051 ML20091L061 ML20091L072 ML20091L085 ML20091L102 ML20091L111 ML20091L131 ML20091L142 ML20091L147 ML20091L153 ML20091L158 ML20091L170 ML20091L176 ML20091L188 ML20091L196 ML20091L211 ML20091L218 ML20091L221 ML20091L228 ML20091L229 ML20091L251 ML20091L264 ML20091L277 ML20091L287 ML20091L293 ML20091L300
References
NUDOCS 9201270349
Download: ML20091L300 (1)

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'i - St at e af N ryland Of f ice of Environraent al Progr mc Waste P nancNnt and Enf ort:e wie nt Program i Tases State Of fice Building Annapoll s, Maryland 21'401 Attentiont 'f r ; P, Wiggtatun Concieu n:

On U-2-80 a suple was drawn f or the routine weekly coli f orm a nalye,is On IM40 the result s f rcm this test indicated a concentration of M Dei n.p'r/100 el. This is a viciation of section 1.c. of the if aryland l St a te Discha rge pertai t. #74-DP-0187A f or Calver t Cliffs Nuclear Power P 's a n '. . Notification of this occurrence was trade t y plant personnel to Mr. P. Viggint on a s per sect ion 11.B.2 of the, pe rmit. This is the required written report. >

d The event wat believed to be caused by n unusually high flow to the

' plant. This flow surge substantially inct'ased the flow in the chlorine 4 contact tank, which, in turn, reduced the t.me from chlorination to -

dechlorinatien. This contact time was too shot

• to provide effective

- di sinfec t ion.

To correct thic situation, the chloriae contact tank vas-drained and cleaned and the ch' '_ne concentration increased. The flow path from the wet well into the plant was adjusted to allow the sarges to be absorbed to prevent recurrence. Additionally, plant p e; tonnel are investigating the possibility of inc reasi ng the surge cenacity as a facility change.

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