ENS 46083

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v t e ENS Event
04:00 Jul 9, 2010
Title	Offsite Notification Due to Elevated Levels of Tritium Found in a Well Sample
Event Description	Entergy Pilgrim Station has twelve groundwater monitoring wells used to sample for tritium and other radioactive nuclides in accordance with the Nuclear Energy Institute's (NEI) voluntary Groundwater Protection Initiative (GPI). One of the wells, MW-205, located in the vicinity of the Condensate Storage Tanks (CST) indicated an elevated level of tritium, however well below the limits established by the NEI Groundwater Protection Initiative, the Nuclear Regulatory Commission's (NRC) limits for liquid effluent release and the Environmental Protection Agency's (EPA) limits for tritium in drinking or non-drinking water wells. The latest sample taken on June 21, 2010, returned a test result of 11,072 picocuries per liter of tritium. To date, tritium is the only isotope detected in the samples collected at the site. This information has been communicated to federal, state and local stakeholders and a press advisory is expected to be issued by the Massachusetts Department of Public Health (MDPH). On that basis and the anticipated interest to the general public this notification is being made. This event has no impact on the health and/or safety of the public. The NRC Resident Inspector is on-site and has been notified. * * UPDATE FROM MERT PROBASCO TO HOWIE CROUCH @ 1808 EDT ON 7/20/10 * * * Entergy Pilgrim Station has received the results of its most recent weekly tritium sample taken on July 7, 2010 for groundwater monitoring well, MW-205. The sample results have shown an increase in the tritium concentration to 25,552 picocuries per liter (pCi/L) from the previous sample taken on June 30, 2010 which had a test result of 8,477 pCi/L. The latest results remain below any regulatory reporting requirements and the Environmental Protection Agency's (EPA) limits for tritium in non-drinking water wells. This information has been communicated to federal, state and local stakeholders. There remains no threat to drinking water sources and no impact on the health and/or safety of the public. The NRC Resident Inspector is on-site and has been notified of this update. This is an update to the 4-hour non-emergency notification made in accordance with 50.72(b)(2)(xi) on July 9, 2010 at 1555 hours0.018 days <br />0.432 hours <br />0.00257 weeks <br />5.916775e-4 months <br />. Notified R1DO (Doerflein).

ENS 46083 +/-
Where
Pilgrim Massachusetts (NRC Region 1)
Reporting

10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
Time - Person (Reporting Time:+11.92 h0.497 days <br />0.071 weeks <br />0.0163 months <br />)
Opened:	John Whalley 15:55 Jul 9, 2010
NRC Officer:	Dong Park
Last Updated:	Jul 20, 2010
46083 - NRC Website
v • d • e

v t e Emergency Notification System
Pilgrim with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
WEEKMONTHYEAR2022-04-15T14:00:00 [Table view]
[ENS list for Pilgrim]

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