Event Notification Report for April 20, 2019
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/19/2019 - 04/20/2019
Power Reactor
Event Number: 54012
Facility: DUANE ARNOLD
Region: 3 State: IA
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: STEPHEN SPIERS
HQ OPS Officer: CATY NOLAN
Region: 3 State: IA
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: STEPHEN SPIERS
HQ OPS Officer: CATY NOLAN
Notification Date: 04/20/2019
Notification Time: 09:54 [ET]
Event Date: 04/20/2019
Event Time: 05:07 [CDT]
Last Update Date: 04/20/2019
Notification Time: 09:54 [ET]
Event Date: 04/20/2019
Event Time: 05:07 [CDT]
Last Update Date: 04/20/2019
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(A) - ECCS INJECTION 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
10 CFR Section:
50.72(b)(2)(iv)(A) - ECCS INJECTION 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
MICHAEL KUNOWSKI (R3DO)
MICHAEL KUNOWSKI (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 100 | Power Operation | 0 | Hot Shutdown |
BOTH REACTOR FEED PUMPS TRIP CAUSING MANUAL REACTOR SCRAM AND ECCS INJECTION
"At 0507 [CDT on April 20, 2019], the DAEC [Duane Arnold Energy Center] experienced a trip of both reactor feed pumps. Operators inserted a manual scram. All control rods inserted, as required. As a result of the feed pump trips and scram, HPCI and RCIC automatically injected. Also, containment isolations occurred, as expected for this event. All systems responded as designed.
"Operators are currently taking the unit to cold shutdown conditions. Vessel level is being controlled by RCIC with Condensate System available. Pressure is being controlled using Main Steam Line drains and the Main Condenser is available."
Normal electrical lineup remains. The cause of the reactor feed pumps tripping is believed to be an instrument air leak to flow control valves, causing loss of suction to both feed pumps.
The licensee notified the NRC Resident Inspector.
"At 0507 [CDT on April 20, 2019], the DAEC [Duane Arnold Energy Center] experienced a trip of both reactor feed pumps. Operators inserted a manual scram. All control rods inserted, as required. As a result of the feed pump trips and scram, HPCI and RCIC automatically injected. Also, containment isolations occurred, as expected for this event. All systems responded as designed.
"Operators are currently taking the unit to cold shutdown conditions. Vessel level is being controlled by RCIC with Condensate System available. Pressure is being controlled using Main Steam Line drains and the Main Condenser is available."
Normal electrical lineup remains. The cause of the reactor feed pumps tripping is believed to be an instrument air leak to flow control valves, causing loss of suction to both feed pumps.
The licensee notified the NRC Resident Inspector.
Agreement State
Event Number: 54793
Rep Org: NE DIV OF RADIOACTIVE MATERIALS
Licensee: Automatic Equipment
Region: 4
City: Pender State: NE
County:
License #: GL0682
Agreement: Y
Docket:
NRC Notified By: Deb Wilson
HQ OPS Officer: Thomas Kendzia
Licensee: Automatic Equipment
Region: 4
City: Pender State: NE
County:
License #: GL0682
Agreement: Y
Docket:
NRC Notified By: Deb Wilson
HQ OPS Officer: Thomas Kendzia
Notification Date: 07/20/2020
Notification Time: 17:35 [ET]
Event Date: 04/20/2019
Event Time: 00:00 [CDT]
Last Update Date: 07/20/2020
Notification Time: 17:35 [ET]
Event Date: 04/20/2019
Event Time: 00:00 [CDT]
Last Update Date: 07/20/2020
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
JAMES DRAKE (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB (EMAIL)
JAMES DRAKE (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB (EMAIL)
AGREEMENT STATE REPORT - LOST TRITIUM EXIT SIGN
The following was received from the state of Nebraska via email and phone:
"Approximately April 2019, a tritium exit sign was thrown away with construction debris while a contractor was cleaning up to remodel from catastrophic flooding in Pender, Nebraska. The sign was discovered missing when inventory was taken 7/17/2020.
"Device Name: RADIOLUMINESCENT SIGN
Manufacturer: Best Lighting
Model Number: SLTURW10
Serial Number: 165713
Radionuclide: H-3
Activity: 7.03 Ci (260.11 GBq)"
Nebraska Incident Report No.: NE200005
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 was received from the state of Nebraska via email and phone:
"Approximately April 2019, a tritium exit sign was thrown away with construction debris while a contractor was cleaning up to remodel from catastrophic flooding in Pender, Nebraska. The sign was discovered missing when inventory was taken 7/17/2020.
"Device Name: RADIOLUMINESCENT SIGN
Manufacturer: Best Lighting
Model Number: SLTURW10
Serial Number: 165713
Radionuclide: H-3
Activity: 7.03 Ci (260.11 GBq)"
Nebraska Incident Report No.: NE200005
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