ML100610526

LER Calvert Cliffs, Special Report: Noncompliance with Effluent Limitations

ML100610526
Person / Time
Site:	Calvert Cliffs
Issue date:	02/22/2010
From:	Lauver D Constellation Energy Nuclear Group, EDF Group
To:	Boone T Office of Nuclear Reactor Regulation, State of MD, Dept of the Environment
References
Download: ML100610526 (2)

Text

Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 CENG a joint venture of

@ Constellation a%", DF Energy, CALVERT CLIFFS NUCLEAR POWER PLANT February 22, 2010 Maryland Department of the Environment Water Management Administration 1800 Washington Boulevard Baltimore, MD 21230 ATTENTION: Mr. Tom Boone

SUBJECT:

Calvert Cliffs Nuclear Power Plant Special Report: Noncompliance with Effluent Limitations

REFERENCE:

(a) NPDES Discharge Permit 02-DP-0 187, Calvert Cliffs Nuclear Power Plant On February 18, 2010, Calvert Cliffs Nuclear Power Plant (CCNPP) personnel identified that waste'water with a pH greater than 9.0 was discharged from the CCNPP site in Lusby, MD between December 18, 2009 and January 26, 2010. The water discharged exceeded the limits of Reference (a). The wastewater was predominantly leakage from the condensate system, consisting of high purity Water with less than 10 ppm of amines added. The pH of the waste water did not exceed 9.7 at any time.

The cause of non-compliance was a misunderstanding by plant personnel. It was thought that the pH limits did not apply to the waste water because it was being discharged through an alternate discharge point instead of being discharged through the waste neutralizing tank (MP 104A) as the waste neutralizing system was out-of-service for maintenance.

The total volume of waste water discharged during this period was estimated to be 175,000 gallons.

Because the high pH waste water was diluted by 2.4 million gallons per minute, there was no impact on the receiving waters. No accelerated or additional monitoring was performed.

To prevent recurrence site personnel have been trained on the pH requirements for discharge.

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Mr. Tom Boone February 22, 2010 Page 2 Should you have questions regarding this matter, please contact Mr. Douglas E. Lauver at (410) 495-5219 or Ms. Brenda D. Nuse at (410) 495-4913.

Very truly yours, for Douglas E. Lauver Director - Licensing DEL/CAN/bjd cc: Mr. D. Lyons, MDE D. V. Pickett, NRC Ms. Carol Coates, MDE Resident Inspector, NRC Document Control Desk, NRC S. Gray, DNR