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The licensee notified the State of Minneso … The licensee notified the State of Minnesota Department of Natural Resources and the Minnesota Pollution Control Agency (MPCA) at 1620 CDT of a fish kill that occurred during a change to the plant circulating water system. Approximately 300-400 fish were found dead in the discharge canal during inspections related to a Zebra Mussel Treatment in progress. The fish included carp, green sunfish, bluegill, carpsuckers, and gizzard shad. The cause appears to be related to temperature changes in the canal as the external circulating water system was manipulated to achieve the 82-84 deg (F) condenser inlet temperatures needed for the treatment and a reduction in plant blowdown flow to the river required by the site discharge permit. The dead fish were contained in discharge canal due to a net that was deployed on Monday in preparation for zebra mussel treatment conducted today (treatment started at 1030 am). Fish in the discharge canal have been dead for 12 to 24 hours. The fish kill is unrelated to the zebra mussel treatment mulluscide addition and did not extend to state waterways.</br>During the Zebra Mussel treatment, detectable mulluscide was found at the sluice gates to the Mississippi River at 1607 and the chemical addition was stopped The chemical is normally neutralized by addition of clay prior to reaching the sluice gates. The 1607 and 1620 samples at the sluice gates showed 0.6 ppm and 0.8 ppm of CL-2005 mulluscide and the 1730 sample had returned to non-detectable. The plant notified the Minnesota Department of Emergency Management of the chemical release at 1856, event number 110570. The MPCA will be notified during business hours tomorrow.</br>A news release is not planned.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
21:20:00, 14 April 2010 +
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21:00:00, 14 April 2010 +
21:20:00, 14 April 2010 +
The licensee notified the State of Minneso … The licensee notified the State of Minnesota Department of Natural Resources and the Minnesota Pollution Control Agency (MPCA) at 1620 CDT of a fish kill that occurred during a change to the plant circulating water system. Approximately 300-400 fish were found dead in the discharge canal during inspections related to a Zebra Mussel Treatment in progress. The fish included carp, green sunfish, bluegill, carpsuckers, and gizzard shad. The cause appears to be related to temperature changes in the canal as the external circulating water system was manipulated to achieve the 82-84 deg (F) condenser inlet temperatures needed for the treatment and a reduction in plant blowdown flow to the river required by the site discharge permit. The dead fish were contained in discharge canal due to a net that was deployed on Monday in preparation for zebra mussel treatment conducted today (treatment started at 1030 am). Fish in the discharge canal have been dead for 12 to 24 hours. The fish kill is unrelated to the zebra mussel treatment mulluscide addition and did not extend to state waterways.</br>During the Zebra Mussel treatment, detectable mulluscide was found at the sluice gates to the Mississippi River at 1607 and the chemical addition was stopped The chemical is normally neutralized by addition of clay prior to reaching the sluice gates. The 1607 and 1620 samples at the sluice gates showed 0.6 ppm and 0.8 ppm of CL-2005 mulluscide and the 1730 sample had returned to non-detectable. The plant notified the Minnesota Department of Emergency Management of the chemical release at 1856, event number 110570. The MPCA will be notified during business hours tomorrow.</br>A news release is not planned.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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83 +
00:00:00, 14 April 2010 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
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21:20:00, 14 April 2010 +
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