31 juillet 2014
Les concentrations mesurées étaient de 59 200 Bq/l en tritium et de 0.44 Bq/l en cobalt 60. Selon la NRC, cette contamination n’a eu aucun impact sur l’eau potable. Une nouvelle analyse sera réalisée le 1er août.
Type : PWR - Puissance : 3 565 MWth - Première divergence : 10/1984
Available in english only.
Event Number : 50333
Facility : CALLAWAY - State : MO -
Unit : [1] - RX Type : [1] W-4-LP
Event Date : 07/31/2014 - Event Time : 14:30
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Initial PWR : 100 % Current PWR : 100 % Event Text
TRITIUM AND COBALT DETECTED IN GROUND WATER MONITORING WELL
"Voluntary notification per the NEI Groundwater Protection Initiative.
"On July 31, 2014, Callaway Plant received results of a sample from a new ground water monitoring well. The sample was taken on July 25, 2014. The sample results indicated a tritium concentration of approximately 1.6 E6 picocuries/liter and a Co-60 concentration of approximately 12 picocuries/liter.
"The new monitoring well is located within the plant’s property and is adjacent to a manhole where the plant’s discharge piping joins with the cooling tower blowdown piping. Both the plant discharge piping and the cooling tower discharge piping are buried.
"Releases from the plant discharge line have been suspended. A backup sample taken on July 25, 2014, will be sent to a lab for analysis. Another sample will be taken on August 1, 2014.
"There is no effect on drinking water, and therefore, no dose to the general public or plant staff."
The licensee will notify the Missouri State Department of Natural Resources and Callaway County officials.
The licensee will notify the NRC Resident Inspector.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20140801en.html
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