Event Notification Report for May 19, 2019
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/18/2019 - 05/19/2019
Power Reactor
Event Number: 54073
Facility: ARKANSAS NUCLEAR
Region: 4 State: AR
Unit: [1] [2] []
RX Type: [1] B&W-L-LP,[2] CE
NRC Notified By: KEVIN PARKS
HQ OPS Officer: JEFF HERRERA
Region: 4 State: AR
Unit: [1] [2] []
RX Type: [1] B&W-L-LP,[2] CE
NRC Notified By: KEVIN PARKS
HQ OPS Officer: JEFF HERRERA
Notification Date: 05/20/2019
Notification Time: 00:02 [ET]
Event Date: 05/19/2019
Event Time: 18:09 [CDT]
Last Update Date: 05/20/2019
Notification Time: 00:02 [ET]
Event Date: 05/19/2019
Event Time: 18:09 [CDT]
Last Update Date: 05/20/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
DAVID PROULX (R4DO)
DAVID PROULX (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 2 | N | Y | 100 | Power Operation | 91 | Power Operation |
LOSS OF THE SAFETY PARAMETER DISPLAY SYSTEM DUE TO INVERTER FAILURE
"On May 19, 2019, at 1809 CDT, the Safety Parameter Display System (SPDS) was lost to both Arkansas Nuclear One Units 1 and 2 due to the SPDS Inverter (2Y-26) failure. The SPDS Inverter is the power supply to both units' SPDS. The Unit 2 Control Room dispatched operators in response to a smoke alarm received from the 2Y-26 Inverter room. Upon arrival, smoke was reported emanating from 2Y-26. There was no report of fire at any time. Field operators de-energized 2Y-26 and the smoke ceased. The loss of SPDS also caused the Power Operating Limits (POL) function of the Unit 2 Core Operating Limits Supervisory System (COLSS) to be lost, so Unit 2 reduced power to 91 [percent] in accordance with Technical Specifications. Both units are at power and stable.
"The NRC Resident has been notified.
"This is reportable per 10 CFR 50.72(b)(3)(xiii)."
"On May 19, 2019, at 1809 CDT, the Safety Parameter Display System (SPDS) was lost to both Arkansas Nuclear One Units 1 and 2 due to the SPDS Inverter (2Y-26) failure. The SPDS Inverter is the power supply to both units' SPDS. The Unit 2 Control Room dispatched operators in response to a smoke alarm received from the 2Y-26 Inverter room. Upon arrival, smoke was reported emanating from 2Y-26. There was no report of fire at any time. Field operators de-energized 2Y-26 and the smoke ceased. The loss of SPDS also caused the Power Operating Limits (POL) function of the Unit 2 Core Operating Limits Supervisory System (COLSS) to be lost, so Unit 2 reduced power to 91 [percent] in accordance with Technical Specifications. Both units are at power and stable.
"The NRC Resident has been notified.
"This is reportable per 10 CFR 50.72(b)(3)(xiii)."
Agreement State
Event Number: 54590
Rep Org: COLORADO DEPT OF HEALTH
Licensee: COLORADO DEPARTMENT OF CORRECTIONS - TERRITORIAL FACILITY
Region: 4
City: CANON CITY State: CO
County:
License #: GL000778
Agreement: Y
Docket:
NRC Notified By: KATHRYN MOTE
HQ OPS Officer: HOWIE CROUCH
Licensee: COLORADO DEPARTMENT OF CORRECTIONS - TERRITORIAL FACILITY
Region: 4
City: CANON CITY State: CO
County:
License #: GL000778
Agreement: Y
Docket:
NRC Notified By: KATHRYN MOTE
HQ OPS Officer: HOWIE CROUCH
Notification Date: 03/19/2020
Notification Time: 16:56 [ET]
Event Date: 05/19/2019
Event Time: 00:00 [MDT]
Last Update Date: 03/19/2020
Notification Time: 16:56 [ET]
Event Date: 05/19/2019
Event Time: 00:00 [MDT]
Last Update Date: 03/19/2020
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
10 CFR Section:
AGREEMENT STATE
Person (Organization):
NEIL O'KEEFE (R4DO)
ILTAB (EMAIL)
NMSS_EVENTS_NOTIFICATION (EMAIL)
NEIL O'KEEFE (R4DO)
ILTAB (EMAIL)
NMSS_EVENTS_NOTIFICATION (EMAIL)
COLORADO AGREEMENT STATE REPORT - MISSING TRITIUM EXIT SIGNS
The following information was summarized from the information received from the state of Colorado via email:
In April 2018, the Colorado Department of Corrections - Territorial Facility identified that 19 tritium exit signs were missing. On 5/9/19, Territorial determined that the signs were lost. The exit signs contained 219 Ci of tritium in total.
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
The following information was summarized from the information received from the state of Colorado via email:
In April 2018, the Colorado Department of Corrections - Territorial Facility identified that 19 tritium exit signs were missing. On 5/9/19, Territorial determined that the signs were lost. The exit signs contained 219 Ci of tritium in total.
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf