Current Event Notification Report for September 27, 2021

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
09/24/2021 - 09/27/2021

Agreement State
Event Number: 55470
Rep Org: COLORADO DEPT OF HEALTH
Licensee: Cheddars Casual Caf‚
Region: 4
City: Colorado Springs   State: CO
County:
License #: GL002038
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Ossy Font
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 07/06/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - TWO LOST TRITIUM EXIT SIGNS

The following was received from the Colorado Department of Health via email:

"Two exit signs, containing 7.09 Ci of tritium each, were reported as lost during annual registration. The owner recalled that the signs had been removed many years ago."

NMED No.: CO210020

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


Agreement State
Event Number: 55471
Rep Org: COLORADO DEPT OF HEALTH
Licensee: T-Mobile - Greeley
Region: 4
City: Greeley   State: CO
County:
License #: GL002207
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Donald Norwood
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 08/04/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - FOUR LOST TRITIUM EXIT SIGNS

The following was received from the Colorado Department of Health via email:

"Four exit signs, each containing 6.2 Ci of tritium, were reported as lost during annual registration. New owner as of 04/01/2021. Upon inspecting the property, unable to locate signs registered with the State."

NMED No.: CO210029

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


Agreement State
Event Number: 55472
Rep Org: COLORADO DEPT OF HEALTH
Licensee: Davis Partnership Architects PC
Region: 4
City: Denver   State: CO
County:
License #: GL000674
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Donald Norwood
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 06/16/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST TRITIUM EXIT SIGN

The following was received from the Colorado Department of Health via email:

"One exit sign, containing 7.5 Ci of tritium, was reported as lost during annual registration."

NMED No.: CO210028

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


Agreement State
Event Number: 55473
Rep Org: COLORADO DEPT OF HEALTH
Licensee: University of Colorado - Denver
Region: 4
City: Denver   State: CO
County:
License #: GL002538
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Donald Norwood
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 06/30/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST TRITIUM EXIT SIGN

The following was received from the Colorado Department of Health via email:

"One exit sign, containing 17.5 Ci of tritium, was reported as lost during annual registration. An exhaustive search resulted in the belief that the contractor never installed the sign."

NMED No.: CO210027

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


Agreement State
Event Number: 55474
Rep Org: COLORADO DEPT OF HEALTH
Licensee: Westin Hotel - Wildwood Lodge
Region: 4
City: Snowmass Village   State: CO
County:
License #: GL002217
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Donald Norwood
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 06/27/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST TRITIUM EXIT SIGN

The following was received from the Colorado Department of Health via email:

"One exit sign, containing 9.2 Ci of Tritium, was reported as lost during annual registration. The owner was not able to locate the sign on the property and the owner was unsure of when the sign was removed."

NMED No.: CO210026

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


Agreement State
Event Number: 55475
Rep Org: COLORADO DEPT OF HEALTH
Licensee: Brodie Management
Region: 4
City: Westminster   State: CO
County:
License #: GL002447
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Donald Norwood
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 07/09/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST TRITIUM EXIT SIGN

The following was received from the Colorado Department of Health via email:

"One exit sign, containing 7.5 Ci of tritium, was reported as lost during annual registration. There was a change of ownership in 2019. The sign was lost or replaced prior to new ownership."

NMED No.: CO210025

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


Agreement State
Event Number: 55476
Rep Org: COLORADO DEPT OF HEALTH
Licensee: Town of Lyons
Region: 4
City: Lyons   State: CO
County:
License #: GL002040
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Ossy Font
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 06/09/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST TRITIUM EXIT SIGN

The following was received from the Colorado Department of Health via email:

"One exit sign, containing 7.03 Ci of tritium, reported as lost during annual registration. The business moved to a new location. It was most likely disposed of with other demolition debris when vacated."

NMED No.: CO210021

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


Agreement State
Event Number: 55477
Rep Org: COLORADO DEPT OF HEALTH
Licensee: One Renaissance LLC
Region: 4
City: Denver   State: CO
County:
License #: GL002564
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Donald Norwood
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 07/01/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST TRITIUM EXIT SIGN

The following information was received via email:

"One exit sign, containing 12.57 Ci of tritium, was reported as lost during annual registration. The location of the sign is unknown."

NMED No.: CO210024


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


Agreement State
Event Number: 55478
Rep Org: COLORADO DEPT OF HEALTH
Licensee: Rocky Mountain Bottling Co.
Region: 4
City: Wheat Ridge   State: CO
County:
License #: GL000979
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Ossy Font
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 06/22/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - TWO LOST TRITIUM EXIT SIGNS

The following was received from the Colorado Department of Health via email:

"Two exit signs, containing 9.2 Ci and 10 Ci of tritium, reported as lost during the annual registration. The timeframe of removal is unknown."

NMED No.: CO210022

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


Agreement State
Event Number: 55479
Rep Org: COLORADO DEPT OF HEALTH
Licensee: Five Rivers Cattle Feeding
Region: 4
City: LaSalle   State: CO
County:
License #: GL002226
Agreement: Y
Docket:
NRC Notified By: Kathryn Mote
HQ OPS Officer: Ossy Font
Notification Date: 09/17/2021
Notification Time: 13:46 [ET]
Event Date: 06/30/2021
Event Time: 00:00 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
ILTAB, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - TWO LOST TRITIUM EXIT SIGNS

The following was received from the Colorado Department of Health via email:

"Two exit signs, containing 6.2 Ci of tritium each, reported as lost during the annual registration. Licensee is unable to locate."

NMED No.: CO210023

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


Fuel Cycle Facility
Event Number: 55480
Facility: Louisiana Energy Services
RX Type:
Comments: Uranium Enrichment Facility
Gas Centrifuge Facility
Region: 2
City: Eunice   State: NM
County: Lea
License #: SNM-2010
Docket: 70-3103
NRC Notified By: Blake Bixenman
HQ OPS Officer: Ossy Font
Notification Date: 09/17/2021
Notification Time: 16:55 [ET]
Event Date: 07/20/2021
Event Time: 14:01 [MDT]
Last Update Date: 09/17/2021
Emergency Class: Non Emergency
10 CFR Section:
70.50(b)(2) - Safety Equipment Failure
Person (Organization):
NMSS_EVENTS_NOTIFICATION (EMAIL)
MILLER, MARK (R2DO)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: CAAS ALARM NOT CLEARLY AUDIBLE

During routine Criticality Accident Alarm System (CAAS) maintenance on July 20, 2021, UUSA [(URENCO USA)] staff identified an area in which the CAAS alarm was not clearly audible. The alarm was (and is) functioning, but not at an adequate level of sound pressure to meet the acceptance criteria. UUSA arranged compensatory measures which achieve an equivalent safety function within 24 hours in the affected area. The affected area was in the Immediate Evacuation Zone (IEZ), outside of the area in which licensed special nuclear material is handled, used, or stored.

On September 16, 2021, an NRC inspector conducting an onsite inspection informed UUSA staff that given the potential that the alarm had not been clearly audible for a period of time between surveillances, this event should have been reported within 24 hours to the NRC in accordance with 10 CFR 70.50(b)(2) in which equipment is disabled or fails to function as designed when required by regulation (10 CFR 70.24).

The licensee will notify the NRC Region 2.


Agreement State
Event Number: 55481
Rep Org: TEXAS DEPT OF STATE HEALTH SERVICES
Licensee: T S I Laboratories INC
Region: 4
City: Victoria   State: TX
County:
License #: L 04767
Agreement: Y
Docket:
NRC Notified By: Art Tucker
HQ OPS Officer: Ossy Font
Notification Date: 09/17/2021
Notification Time: 22:14 [ET]
Event Date: 09/17/2021
Event Time: 00:00 [CDT]
Last Update Date: 09/20/2021
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
AZUA, RAY (R4)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: AGREEMENT STATE REPORT - DAMAGED MOISTURE DENSITY GAUGE

The following was received from the Texas Department of State Health Services (the Agency) via email:

"On September 17, 2021, the Agency was notified by the licensee that a Troxler 3411 moisture density gauge containing a 40 milliCurie americium - 241 source and an 8 milliCurie cesium - 137 source was damaged at a temporary job site. The licensee reported that while the gauge was sitting on the ground and not being used it was run over by a bulldozer, snapping the operating arm of the cesium source. The source was in the shielded position when the event occurred and a radiation survey of the gauge after the event verified it was still fully shielded. The licensee stated the gauge would be returned to its storage location and arrangements would be made to have the gauge disposed of. No individual received an exposure that exceeded any limit. Additional information will be provided as it is received in accordance with SA-300."

Texas Incident No.: 9885

* * * UPDATE FROM ART TUCKER TO THOMAS HERRITY AT 11:23 ON 09/20/21 * * *
The following information was received via e-mail:

"Received pictures of the gauge. Pictures show the rod for the cesium source was bent. The dose rate meter appears to be reading 0.8 millirem per hour."

Notified R4DO (YOUNG) and NMSS Events Notification group.


Power Reactor
Event Number: 55484
Facility: Limerick
Region: 1     State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: Kris Strausser
HQ OPS Officer: Howie Crouch
Notification Date: 09/23/2021
Notification Time: 18:46 [ET]
Event Date: 09/23/2021
Event Time: 14:43 [EDT]
Last Update Date: 09/23/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
LALLY, CHRISTOPHER (R1)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
Event Text
EN Revision Imported Date: 9/27/2021

EN Revision Text: HIGH PRESSURE COOLANT INJECTION SYSTEM DECLARED INOPERABLE

"During planned testing of the Unit 1 HPCI [high pressure coolant injection] system, flow controller oscillations occurred which prevented successful completion of the surveillance test. Operators secured Unit 1 HPCI and declared the system inoperable."

HPCI inoperable placed the licensee in a 14-day limiting condition for operation that was extended to 30 days after their risk-informed completion time evaluation was done.

The licensee has notified the NRC Resident Inspector.


Part 21
Event Number: 55490
Rep Org: Southern Nuclear, Fleet Regulatory
Licensee: Joseph M. Farley Nuclear Plant (FNP)
Region: 1
City: Birmingham   State: AL
County:
License #:
Agreement: N
Docket:
NRC Notified By: Cheryl Gayheart
HQ OPS Officer: Thomas Herrity
Notification Date: 09/24/2021
Notification Time: 17:27 [ET]
Event Date: 09/24/2021
Event Time: 00:00 [CDT]
Last Update Date: 09/24/2021
Emergency Class: Non Emergency
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Person (Organization):
MILLER, MARK (R2DO)
PART 21/50.55 REACTORS, - (EMAIL)
Event Text
GENERAL ELECTRIC HITACHI TRIP UNITS RIVETS POPPING OFF

"Based upon a 10 CFR 21.21(b) transfer notification from General Electric Hitachi (GEH), Southern Nuclear Operating Company's (SNC) Joseph M. Farley Nuclear Plant (FNP) has determined there is evidence a Substantial Safety Hazard could have been created by the failure of the rivets installed on certain EC Trip Units if they were left uncorrected. These EC Trip Units are a subcomponent of all five (5) emergency diesel generator control panel supply breakers at FNP.

"This defect was identified and the components were repaired by GEH before being installed in the plant. These defective EC Trip Units never posed a challenge to the safe operation of FNP.

"The NRC Senior Resident Inspector at FNP has been notified."


Power Reactor
Event Number: 55492
Facility: Nine Mile Point
Region: 1     State: NY
Unit: [1] [] []
RX Type: [1] GE-2,[2] GE-5
NRC Notified By: Amanda Tetro
HQ OPS Officer: Donald Norwood
Notification Date: 09/25/2021
Notification Time: 09:16 [ET]
Event Date: 09/25/2021
Event Time: 03:42 [EDT]
Last Update Date: 09/25/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(B) - Pot Rhr Inop
Person (Organization):
LALLY, CHRISTOPHER (R1)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
Event Text
LOSS OF UNINTERRUPTIBLE POWER SUPPLY RESULTED IN ISOLATION OF TWO EMERGENCY CONDENSERS

"On 9/25/2021 at 0342 EDT, Nine Mile Point Nuclear Station Unit 1 experienced a loss of the Uninterruptible Power Supply (UPS), UPS 162A, which resulted in a loss of Reactor Protection System (RPS) Bus 11. This resulted in an isolation of both No. 11 and No. 12 Emergency Condensers. Emergency Condenser No. 11 was returned to standby on 9/25/2021 at 0420 EDT and Emergency Condenser No. 12 was returned to standby on 9/25/2021 at 0429 EDT.

"This 8-hour non-emergency report is being made based upon requirements of 10 CFR 50.72(b)(3)(v)(B) which states: 'Licensee shall notify the NRC of any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to: (B) remove residual heat.'

"The NRC Senior Resident was informed."

Page Last Reviewed/Updated Monday, September 27, 2021