Event Notification Report for December 14, 2016
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/13/2016 - 12/14/2016
Power Reactor
Event Number: 52430
Facility: FERMI
Region: 3 State: MI
Unit: [2] [] []
RX Type: [2] GE-4
NRC Notified By: KELLEY BELENKY
HQ OPS Officer: DONG HWA PARK
Region: 3 State: MI
Unit: [2] [] []
RX Type: [2] GE-4
NRC Notified By: KELLEY BELENKY
HQ OPS Officer: DONG HWA PARK
Notification Date: 12/14/2016
Notification Time: 11:20 [ET]
Event Date: 12/14/2016
Event Time: 09:45 [EST]
Last Update Date: 12/14/2016
Notification Time: 11:20 [ET]
Event Date: 12/14/2016
Event Time: 09:45 [EST]
Last Update Date: 12/14/2016
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):
JAMNES CAMERON (R3DO)
JAMNES CAMERON (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 |
OFFSITE NOTIFICATION MADE FOR A SEWAGE LEAK
"At 0945 EST on 12/14/16, Fermi 2 discovered a sanitary sewer system leaking through a covered manhole in the Owner Controlled Area. Approximately 100 gallons of the sewage has entered the storm drain system. The sewage leak was stopped at 1030. A local sanitary contractor is currently responding to the site to clean the affected areas. The cause and extent of the sewage teak is under investigation.
"Reports to the Michigan Department of Environmental Quality (MDEQ), the local health department (Monroe County), and the local news media are in progress. Since these reports are in the process of being made, this is considered a News Release or Notification to Other Government Agencies, therefore this event is reportable under 10CFR50.72(b)(2)(xi).
"The licensee has notified the NRC Resident Inspector."
"At 0945 EST on 12/14/16, Fermi 2 discovered a sanitary sewer system leaking through a covered manhole in the Owner Controlled Area. Approximately 100 gallons of the sewage has entered the storm drain system. The sewage leak was stopped at 1030. A local sanitary contractor is currently responding to the site to clean the affected areas. The cause and extent of the sewage teak is under investigation.
"Reports to the Michigan Department of Environmental Quality (MDEQ), the local health department (Monroe County), and the local news media are in progress. Since these reports are in the process of being made, this is considered a News Release or Notification to Other Government Agencies, therefore this event is reportable under 10CFR50.72(b)(2)(xi).
"The licensee has notified the NRC Resident Inspector."
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 52432
Facility: FERMI
Region: 3 State: MI
Unit: [2] [] []
RX Type: [2] GE-4
NRC Notified By: KELLY BELENKY
HQ OPS Officer: VINCE KLCO
Region: 3 State: MI
Unit: [2] [] []
RX Type: [2] GE-4
NRC Notified By: KELLY BELENKY
HQ OPS Officer: VINCE KLCO
Notification Date: 12/14/2016
Notification Time: 15:10 [ET]
Event Date: 12/14/2016
Event Time: 00:00 [EST]
Last Update Date: 03/17/2017
Notification Time: 15:10 [ET]
Event Date: 12/14/2016
Event Time: 00:00 [EST]
Last Update Date: 03/17/2017
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
Person (Organization):
JAMNES CAMERON (R3DO)
JAMNES CAMERON (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 |
SECONDARY CONTAINMENT PRESSURE BOUNDARY OUT OF SPECIFICATION
"On December 14, 2016, at 1314 EST, the startup of the Reactor Building HVAC [Heating, Ventilation and Air Conditioning] system resulted in the Technical Specification (TS) for secondary containment pressure boundary not being met for approximately 1 second. The maximum secondary containment pressure observed during that time was approximately 0.07 inches of vacuum water gauge.
"Secondary containment pressure was returned to within the TS operability limit of 0.125 inches of vacuum water gauge (TS SR 3.6.4.1.1) by Reactor Building HVAC and Standby Gas Treatment System already in operation. There were no radiological releases associated with this event.
"Declaring secondary containment inoperable is reportable under 10CFR50.72(b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material.
"The licensee has notified the NRC Resident Inspector."
* * * RETRACTION AT 1922 EDT ON 3/17/2017 FROM DEREK ETUE TO BETHANY CECERE * * *
"In this event notification, DTE Electric Company (DTE) reported conditions whereby the Fermi 2 secondary containment was believed to have exceeded Technical Specification Surveillance Requirements due to high winds. DTE hereby retracts this event notification as the Fermi 2 secondary containment has been determined to have been operable during this event as described below.
"The Fermi 2 secondary containment pressure is maintained at a pressure less than the external pressure to contain, dilute, hold up, and reduce the activity level of fission products prior to release to the environment, and to isolate and contain fission products that are released during a Design Basis Accident or certain operations. Secondary containment pressure is monitored by a number of differential pressure (dP) sensors. High wind gusts have resulted in momentary negative pressure on the leeward side of the building, causing a more positive pressure indication from one or more dP sensors. The secondary containment building pressure remains relatively constant during these 'wind events.'
"In December 2016, DTE implemented a software design change to display a 120-second rolling average for secondary containment dP indication. A 120-second rolling average recorded every second provides the operator a more accurate report of actual secondary containment conditions, while mitigating the signal noise and wind gust effects. The conditions associated with the subject event notification were re-reviewed in light of the improved secondary containment dP indication and it was determined that the Fermi 2 secondary containment was operable during this event. Specifically, the secondary containment pressure did not exceed Technical Specification Surveillance Requirements during this event.
"In summary, the above event notification is retracted because the Fermi 2 secondary containment was determined to have been fully operable during the conditions identified in the subject report."
The licensee notified the NRC Resident Inspector.
Notified R3DO (Stoedter)
"On December 14, 2016, at 1314 EST, the startup of the Reactor Building HVAC [Heating, Ventilation and Air Conditioning] system resulted in the Technical Specification (TS) for secondary containment pressure boundary not being met for approximately 1 second. The maximum secondary containment pressure observed during that time was approximately 0.07 inches of vacuum water gauge.
"Secondary containment pressure was returned to within the TS operability limit of 0.125 inches of vacuum water gauge (TS SR 3.6.4.1.1) by Reactor Building HVAC and Standby Gas Treatment System already in operation. There were no radiological releases associated with this event.
"Declaring secondary containment inoperable is reportable under 10CFR50.72(b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material.
"The licensee has notified the NRC Resident Inspector."
* * * RETRACTION AT 1922 EDT ON 3/17/2017 FROM DEREK ETUE TO BETHANY CECERE * * *
"In this event notification, DTE Electric Company (DTE) reported conditions whereby the Fermi 2 secondary containment was believed to have exceeded Technical Specification Surveillance Requirements due to high winds. DTE hereby retracts this event notification as the Fermi 2 secondary containment has been determined to have been operable during this event as described below.
"The Fermi 2 secondary containment pressure is maintained at a pressure less than the external pressure to contain, dilute, hold up, and reduce the activity level of fission products prior to release to the environment, and to isolate and contain fission products that are released during a Design Basis Accident or certain operations. Secondary containment pressure is monitored by a number of differential pressure (dP) sensors. High wind gusts have resulted in momentary negative pressure on the leeward side of the building, causing a more positive pressure indication from one or more dP sensors. The secondary containment building pressure remains relatively constant during these 'wind events.'
"In December 2016, DTE implemented a software design change to display a 120-second rolling average for secondary containment dP indication. A 120-second rolling average recorded every second provides the operator a more accurate report of actual secondary containment conditions, while mitigating the signal noise and wind gust effects. The conditions associated with the subject event notification were re-reviewed in light of the improved secondary containment dP indication and it was determined that the Fermi 2 secondary containment was operable during this event. Specifically, the secondary containment pressure did not exceed Technical Specification Surveillance Requirements during this event.
"In summary, the above event notification is retracted because the Fermi 2 secondary containment was determined to have been fully operable during the conditions identified in the subject report."
The licensee notified the NRC Resident Inspector.
Notified R3DO (Stoedter)
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 52434
Facility: FERMI
Region: 3 State: MI
Unit: [2] [] []
RX Type: [2] GE-4
NRC Notified By: GREG MILLER
HQ OPS Officer: MARK ABRAMOVITZ
Region: 3 State: MI
Unit: [2] [] []
RX Type: [2] GE-4
NRC Notified By: GREG MILLER
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 12/15/2016
Notification Time: 03:40 [ET]
Event Date: 12/14/2016
Event Time: 23:45 [EST]
Last Update Date: 03/17/2017
Notification Time: 03:40 [ET]
Event Date: 12/14/2016
Event Time: 23:45 [EST]
Last Update Date: 03/17/2017
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
Person (Organization):
JAMNES CAMERON (R3DO)
JAMNES CAMERON (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 |
SECONDARY CONTAINMENT MOMENTARY LOW PRESSURE DUE TO HIGH WINDS
"On December 14, 2016, starting at 2345 EST, high wind conditions encountered on site resulted in the Technical Specification (TS) for secondary containment pressure boundary not being met numerous times. The duration of time that the secondary containment Technical Specification was not met was approximately one second for each instance.
"All plant equipment responded as required to the changing environmental conditions and Reactor Building HVAC returned secondary containment pressure within TS limits. At 0300 EST on December 15, 2016, high wind conditions had subsided and secondary containment vacuum was greater than the TS operability limit of 0.125 inches of vacuum water gauge (TS SR 3.6.4.1.1) and steady, and the LCO was exited. There were no radiological releases associated with this event.
"Declaring secondary containment inoperable is reportable under 10CFR50.72(b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material.
"The licensee has notified the NRC Resident Inspector."
* * * RETRACTION AT 1922 EDT ON 3/17/2017 FROM DEREK ETUE TO BETHANY CECERE * * *
"In this event notification, DTE Electric Company (DTE) reported conditions whereby the Fermi 2 secondary containment was believed to have exceeded Technical Specification Surveillance Requirements due to high winds. DTE hereby retracts this event notification as the Fermi 2 secondary containment has been determined to have been operable during this event as described below.
"The Fermi 2 secondary containment pressure is maintained at a pressure less than the external pressure to contain, dilute, hold up, and reduce the activity level of fission products prior to release to the environment, and to isolate and contain fission products that are released during a Design Basis Accident or certain operations. Secondary containment pressure is monitored by a number of differential pressure (dP) sensors. High wind gusts have resulted in momentary negative pressure on the leeward side of the building, causing a more positive pressure indication from one or more dP sensors. The secondary containment building pressure remains relatively constant during these 'wind events.'
"In December 2016, DTE implemented a software design change to display a 120-second rolling average for secondary containment dP indication. A 120-second rolling average recorded every second provides the operator a more accurate report of actual secondary containment conditions, while mitigating the signal noise and wind gust effects. The conditions associated with the subject event notification were re-reviewed in light of the improved secondary containment dP indication and it was determined that the Fermi 2 secondary containment was operable during this event. Specifically, the secondary containment pressure did not exceed Technical Specification Surveillance Requirements during this event.
"In summary, the above event notification is retracted because the Fermi 2 secondary containment was determined to have been fully operable during the conditions identified in the subject report."
The licensee notified the NRC Resident Inspector.
Notified R3DO (Stoedter)
"On December 14, 2016, starting at 2345 EST, high wind conditions encountered on site resulted in the Technical Specification (TS) for secondary containment pressure boundary not being met numerous times. The duration of time that the secondary containment Technical Specification was not met was approximately one second for each instance.
"All plant equipment responded as required to the changing environmental conditions and Reactor Building HVAC returned secondary containment pressure within TS limits. At 0300 EST on December 15, 2016, high wind conditions had subsided and secondary containment vacuum was greater than the TS operability limit of 0.125 inches of vacuum water gauge (TS SR 3.6.4.1.1) and steady, and the LCO was exited. There were no radiological releases associated with this event.
"Declaring secondary containment inoperable is reportable under 10CFR50.72(b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material.
"The licensee has notified the NRC Resident Inspector."
* * * RETRACTION AT 1922 EDT ON 3/17/2017 FROM DEREK ETUE TO BETHANY CECERE * * *
"In this event notification, DTE Electric Company (DTE) reported conditions whereby the Fermi 2 secondary containment was believed to have exceeded Technical Specification Surveillance Requirements due to high winds. DTE hereby retracts this event notification as the Fermi 2 secondary containment has been determined to have been operable during this event as described below.
"The Fermi 2 secondary containment pressure is maintained at a pressure less than the external pressure to contain, dilute, hold up, and reduce the activity level of fission products prior to release to the environment, and to isolate and contain fission products that are released during a Design Basis Accident or certain operations. Secondary containment pressure is monitored by a number of differential pressure (dP) sensors. High wind gusts have resulted in momentary negative pressure on the leeward side of the building, causing a more positive pressure indication from one or more dP sensors. The secondary containment building pressure remains relatively constant during these 'wind events.'
"In December 2016, DTE implemented a software design change to display a 120-second rolling average for secondary containment dP indication. A 120-second rolling average recorded every second provides the operator a more accurate report of actual secondary containment conditions, while mitigating the signal noise and wind gust effects. The conditions associated with the subject event notification were re-reviewed in light of the improved secondary containment dP indication and it was determined that the Fermi 2 secondary containment was operable during this event. Specifically, the secondary containment pressure did not exceed Technical Specification Surveillance Requirements during this event.
"In summary, the above event notification is retracted because the Fermi 2 secondary containment was determined to have been fully operable during the conditions identified in the subject report."
The licensee notified the NRC Resident Inspector.
Notified R3DO (Stoedter)