Event Notification Report for June 08, 2014
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/07/2014 - 06/08/2014
EVENT NUMBERS
50180
Power Reactor
Event Number: 50180
Facility: DRESDEN
Region: 3 State: IL
Unit: [] [2] [3]
RX Type: [1] GE-1,[2] GE-3,[3] GE-3
NRC Notified By: EDWARD BURNS
HQ OPS Officer: HOWIE CROUCH
Region: 3 State: IL
Unit: [] [2] [3]
RX Type: [1] GE-1,[2] GE-3,[3] GE-3
NRC Notified By: EDWARD BURNS
HQ OPS Officer: HOWIE CROUCH
Notification Date: 06/08/2014
Notification Time: 17:03 [ET]
Event Date: 06/08/2014
Event Time: 16:15 [CDT]
Last Update Date: 06/09/2014
Notification Time: 17:03 [ET]
Event Date: 06/08/2014
Event Time: 16:15 [CDT]
Last Update Date: 06/09/2014
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
ANN MARIE STONE (R3DO)
ANN MARIE STONE (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
OFFSITE NOTIFICATION DUE TO TRITIUM DISCOVERED IN ONSITE WELL
"This notification is being made pursuant to 10 CFR 50.72(b)(2)(xi) because Dresden Nuclear Power Station is in the process of informing the Illinois Emergency Management Agency (lEMA) and Illinois Environmental Protection Agency (IEPA) of recent groundwater monitoring results at Dresden Station. Additionally, the station intends to issue a press release.
"As part of the Station's extensive environmental monitoring and sampling program, sample results from an onsite sampling well near the 2/3 contaminated water storage tank (CST) indicate elevated levels of tritium. This is an on-site leak, requiring the notification of the State of Illinois. Based on sampling data obtained, the tritium is currently confined to Exelon property.
"The IEPA/lEMA regulation requires notification when a release to soil, groundwater or surface water goes offsite at greater than 200 pCi/L or remains on-site greater than 0.002 Curies. Based upon the sampling results from the monitoring well near the 2/3 CST with a concentration of approximately 0.0000013 Curies/liter it is likely that the 0.002 Curie on-site threshold has been exceeded.
"The Station continues to track this issue by monitoring the existing wells and initiation of mitigative actions to contain any release and ensure it remains on-site. At this time, the source of the tritium has not been identified. Investigation continues to determine if an off-site release occurred.
"The licensee has notified the NRC Resident Inspector."
* * * UPDATE AT 1951 EDT ON 6/9/2014 FROM THOMAS DITCHFIELD TO MARK ABRAMOVITZ * * *
"At 1830 [CDT], the station notified IEPA/IEMA, pursuant to 35 ILL. ADM. Code 1010.202, that from the time period of April 2, 2014, to June 8, 2014, elevated levels of tritium existed at the discharge of the plant. As part of the site investigation that was done in response to the event reported in EN 50180, it has been determined that no greater than 0.1 Curies were discharged from the site. The majority of this discharge was to the Kankakee River via the sewage treatment plant effluent. A small amount, determined to be less than 2%, was discharged to the Morris Illinois sewage treatment facility. This release is associated with the elevated tritium levels discovered on June 7, 2014 and reported to the IEPA on June 8, 2014.
"The system is currently isolated, and is not discharging to the Kankakee River.
The licensee notified the NRC Resident Inspector.
Notified the R3DO (Daley).
"This notification is being made pursuant to 10 CFR 50.72(b)(2)(xi) because Dresden Nuclear Power Station is in the process of informing the Illinois Emergency Management Agency (lEMA) and Illinois Environmental Protection Agency (IEPA) of recent groundwater monitoring results at Dresden Station. Additionally, the station intends to issue a press release.
"As part of the Station's extensive environmental monitoring and sampling program, sample results from an onsite sampling well near the 2/3 contaminated water storage tank (CST) indicate elevated levels of tritium. This is an on-site leak, requiring the notification of the State of Illinois. Based on sampling data obtained, the tritium is currently confined to Exelon property.
"The IEPA/lEMA regulation requires notification when a release to soil, groundwater or surface water goes offsite at greater than 200 pCi/L or remains on-site greater than 0.002 Curies. Based upon the sampling results from the monitoring well near the 2/3 CST with a concentration of approximately 0.0000013 Curies/liter it is likely that the 0.002 Curie on-site threshold has been exceeded.
"The Station continues to track this issue by monitoring the existing wells and initiation of mitigative actions to contain any release and ensure it remains on-site. At this time, the source of the tritium has not been identified. Investigation continues to determine if an off-site release occurred.
"The licensee has notified the NRC Resident Inspector."
* * * UPDATE AT 1951 EDT ON 6/9/2014 FROM THOMAS DITCHFIELD TO MARK ABRAMOVITZ * * *
"At 1830 [CDT], the station notified IEPA/IEMA, pursuant to 35 ILL. ADM. Code 1010.202, that from the time period of April 2, 2014, to June 8, 2014, elevated levels of tritium existed at the discharge of the plant. As part of the site investigation that was done in response to the event reported in EN 50180, it has been determined that no greater than 0.1 Curies were discharged from the site. The majority of this discharge was to the Kankakee River via the sewage treatment plant effluent. A small amount, determined to be less than 2%, was discharged to the Morris Illinois sewage treatment facility. This release is associated with the elevated tritium levels discovered on June 7, 2014 and reported to the IEPA on June 8, 2014.
"The system is currently isolated, and is not discharging to the Kankakee River.
The licensee notified the NRC Resident Inspector.
Notified the R3DO (Daley).