Event Notification Report for May 08, 2023
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/07/2023 - 05/08/2023
Agreement State
Event Number: 56496
Rep Org: Florida Bureau of Radiation Control
Licensee: Atkins North Americal
Region: 1
City: Tampa State: FL
County:
License #: 0689-2
Agreement: Y
Docket:
NRC Notified By: Reno Fabii
HQ OPS Officer: Kerby Scales
Licensee: Atkins North Americal
Region: 1
City: Tampa State: FL
County:
License #: 0689-2
Agreement: Y
Docket:
NRC Notified By: Reno Fabii
HQ OPS Officer: Kerby Scales
Notification Date: 04/30/2023
Notification Time: 23:14 [ET]
Event Date: 04/30/2023
Event Time: 00:00 [EDT]
Last Update Date: 04/30/2023
Notification Time: 23:14 [ET]
Event Date: 04/30/2023
Event Time: 00:00 [EDT]
Last Update Date: 04/30/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Henrion, Mark (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Henrion, Mark (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
AGREEMENT STATE REPORT - STOLEN TROXLER GAUGES
The following information was received from the Florida Bureau of Radiation Control via email:
"[The Florida Bureau of Radiation Control] received a call from the [Radiation Safety Officer] RSO at Atkins North America, reporting the theft of five Troxler gauges from their facility in Tampa, FL. Tampa Police report number 23-18111075.
"1) Model 3440, serial number 27848, source serial number Cs 750-1764, AmBe 47-24477
"2) Model 3440, serial number 23089, source serial number Cs 75-4899, AmBe 47-18903
"3) Model 3430, serial number 27128, source serial number Cs 750-846, AmBe 47-23647
"4) Model 3440, serial number 32293, source serial number Cs 750-7450, AmBe 47-10058
"5) Model 3440, serial number 29466, source serial number Cs 750-3720, AmBe 47-26413"
Activity for each gauge:
Cesium-137 8mCi
Am-Be 40mCi
Florida Incident Number: FL23-061
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 received from the Florida Bureau of Radiation Control via email:
"[The Florida Bureau of Radiation Control] received a call from the [Radiation Safety Officer] RSO at Atkins North America, reporting the theft of five Troxler gauges from their facility in Tampa, FL. Tampa Police report number 23-18111075.
"1) Model 3440, serial number 27848, source serial number Cs 750-1764, AmBe 47-24477
"2) Model 3440, serial number 23089, source serial number Cs 75-4899, AmBe 47-18903
"3) Model 3430, serial number 27128, source serial number Cs 750-846, AmBe 47-23647
"4) Model 3440, serial number 32293, source serial number Cs 750-7450, AmBe 47-10058
"5) Model 3440, serial number 29466, source serial number Cs 750-3720, AmBe 47-26413"
Activity for each gauge:
Cesium-137 8mCi
Am-Be 40mCi
Florida Incident Number: FL23-061
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
Power Reactor
Event Number: 56502
Facility: Limerick
Region: 1 State: PA
Unit: [2] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: William F. Bulafka
HQ OPS Officer: Sam Colvard
Region: 1 State: PA
Unit: [2] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: William F. Bulafka
HQ OPS Officer: Sam Colvard
Notification Date: 05/04/2023
Notification Time: 10:27 [ET]
Event Date: 05/03/2023
Event Time: 12:30 [EDT]
Last Update Date: 05/04/2023
Notification Time: 10:27 [ET]
Event Date: 05/03/2023
Event Time: 12:30 [EDT]
Last Update Date: 05/04/2023
Emergency Class: Non Emergency
10 CFR Section:
26.719 - Fitness For Duty
10 CFR Section:
26.719 - Fitness For Duty
Person (Organization):
Dimitriadis, Anthony (R1DO)
FFD Group, (EMAIL)
Dimitriadis, Anthony (R1DO)
FFD Group, (EMAIL)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | N | 0 | Refueling | 0 | Refueling |
FITNESS FOR DUTY REPORT
The following information was provided by the licensee via phone and email:
"A non-licensed, non-supervisor contractor was found to be in possession of alcohol in the protected area. The individual's site access has been terminated."
The NRC Senior Resident Inspector has been notified.
The following information was provided by the licensee via phone and email:
"A non-licensed, non-supervisor contractor was found to be in possession of alcohol in the protected area. The individual's site access has been terminated."
The NRC Senior Resident Inspector has been notified.
Power Reactor
Event Number: 56505
Facility: Browns Ferry
Region: 2 State: AL
Unit: [1] [2] [3]
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: Chase Hensley
HQ OPS Officer: Ernest West
Region: 2 State: AL
Unit: [1] [2] [3]
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: Chase Hensley
HQ OPS Officer: Ernest West
Notification Date: 05/05/2023
Notification Time: 16:00 [ET]
Event Date: 05/04/2023
Event Time: 20:34 [CDT]
Last Update Date: 05/05/2023
Notification Time: 16:00 [ET]
Event Date: 05/04/2023
Event Time: 20:34 [CDT]
Last Update Date: 05/05/2023
Emergency Class: Non Emergency
10 CFR Section:
26.719 - Fitness For Duty
10 CFR Section:
26.719 - Fitness For Duty
Person (Organization):
Miller, Mark (R2DO)
FFD Group, (EMAIL)
Miller, Mark (R2DO)
FFD Group, (EMAIL)
| 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 | 100 | Power Operation |
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
FITNESS FOR DUTY REPORT
The following information was provided by the licensee via email:
"On 05/04/2023 at 2034 CDT, a Browns Ferry Nuclear Plant non-licensed employee supervisor had a confirmed positive drug test identified during random fitness-for-duty medical testing. Employee's unescorted access has been suspended. A review of the employee's work has been completed.
"The [NRC] Resident Inspector has been notified."
The following information was provided by the licensee via email:
"On 05/04/2023 at 2034 CDT, a Browns Ferry Nuclear Plant non-licensed employee supervisor had a confirmed positive drug test identified during random fitness-for-duty medical testing. Employee's unescorted access has been suspended. A review of the employee's work has been completed.
"The [NRC] Resident Inspector has been notified."
Agreement State
Event Number: 56498
Rep Org: Texas Dept of State Health Services
Licensee: Quantum Technical Services LLC
Region: 4
City: Houston State: TX
County:
License #: 06406
Agreement: Y
Docket:
NRC Notified By: Arthur Tucker
HQ OPS Officer: John Russell
Licensee: Quantum Technical Services LLC
Region: 4
City: Houston State: TX
County:
License #: 06406
Agreement: Y
Docket:
NRC Notified By: Arthur Tucker
HQ OPS Officer: John Russell
Notification Date: 05/02/2023
Notification Time: 17:04 [ET]
Event Date: 05/02/2023
Event Time: 00:00 [CDT]
Last Update Date: 05/02/2023
Notification Time: 17:04 [ET]
Event Date: 05/02/2023
Event Time: 00:00 [CDT]
Last Update Date: 05/02/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Gaddy, Vincent (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
CNSNS (Mexico), - (FAX)
Gaddy, Vincent (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
CNSNS (Mexico), - (FAX)
AGREEMENT STATE REPORT - LOST SOURCE
The following information was received from the Texas Department of State Health Services [the Agency] via email:
"On May 2, 2023, the Agency was notified by the licensee that they were unable to locate a 200 millicurie cobalt - 60 source. The licensee stated that the company had three locations in the United States, one in California, one in Louisiana, and one in Texas. In January of 2023, the company decided to close its offices. The company transferred all its sources to the Texas location. The sources were then sent to a source disposal company in Texas. During the last transfer of sources, the cobalt source could not be found. The licensee searched for the source at the Texas facility but could not find it. The process of locating where the source might be is complicated by the fact that the licensee had laid off most of the employees. The Radiation Safety Officer (RSO) was included in the layoff.
"The individual tasked by the company to dispose of the sources contacted a few of the previous employees and was told that the source was transferred to the location in Louisiana. [The Agency] asked if they had the documents for the transfer. He stated they had given all the documents to the Louisiana location. He did not have a copy of the forms.
"He said the source itself is about half the size of a magic marker. He said it is normally stored in a lead box in a sea van. He said that they would search their paperwork including the sign-out log in Louisiana to see if they can confirm the source was there.
The Agency advised the individual to go to Louisiana and search for the source in and around the storage area. He was also advised to get someone added to their license as RSO.
"Additional information will be provided as it is received in accordance with SA-300"
Texas Incident Number: 10014
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 received from the Texas Department of State Health Services [the Agency] via email:
"On May 2, 2023, the Agency was notified by the licensee that they were unable to locate a 200 millicurie cobalt - 60 source. The licensee stated that the company had three locations in the United States, one in California, one in Louisiana, and one in Texas. In January of 2023, the company decided to close its offices. The company transferred all its sources to the Texas location. The sources were then sent to a source disposal company in Texas. During the last transfer of sources, the cobalt source could not be found. The licensee searched for the source at the Texas facility but could not find it. The process of locating where the source might be is complicated by the fact that the licensee had laid off most of the employees. The Radiation Safety Officer (RSO) was included in the layoff.
"The individual tasked by the company to dispose of the sources contacted a few of the previous employees and was told that the source was transferred to the location in Louisiana. [The Agency] asked if they had the documents for the transfer. He stated they had given all the documents to the Louisiana location. He did not have a copy of the forms.
"He said the source itself is about half the size of a magic marker. He said it is normally stored in a lead box in a sea van. He said that they would search their paperwork including the sign-out log in Louisiana to see if they can confirm the source was there.
The Agency advised the individual to go to Louisiana and search for the source in and around the storage area. He was also advised to get someone added to their license as RSO.
"Additional information will be provided as it is received in accordance with SA-300"
Texas Incident Number: 10014
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: 56499
Rep Org: Florida Bureau of Radiation Control
Licensee: AE Engineering
Region: 1
City: Lake Placid State: FL
County:
License #: 4478-1
Agreement: Y
Docket:
NRC Notified By: John Williamson
HQ OPS Officer: Brian P. Smith
Licensee: AE Engineering
Region: 1
City: Lake Placid State: FL
County:
License #: 4478-1
Agreement: Y
Docket:
NRC Notified By: John Williamson
HQ OPS Officer: Brian P. Smith
Notification Date: 05/02/2023
Notification Time: 18:09 [ET]
Event Date: 05/02/2023
Event Time: 17:00 [EDT]
Last Update Date: 05/02/2023
Notification Time: 18:09 [ET]
Event Date: 05/02/2023
Event Time: 17:00 [EDT]
Last Update Date: 05/02/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Dimitriadis, Anthony (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Dimitriadis, Anthony (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
AGREEMENT STATE REPORT - STOLEN TROXLER GAUGES
The following report was received from the State of Florida Bureau of Radiation Control [BRC] via email:
"At 1720 [EDT], BRC received a call from [the licensee]. [The licensee] stated two Troxler [soil moisture density] gauges [Model Numbers 3440 and 3430; Serial Numbers 20750 and 77517; and sources 8mCi Cs-137 and 40mCi Am-241/Be] were stolen from their storage facility in Lake Placid, FL. [The] gauges were last signed in to the facility on the 28th of April and sat idle. [The] exact time of loss is not currently known, but [the licensee] went to retrieve the gauges on 5/2/23 at 1700 [EDT]. Law enforcement was notified prior to BRC's contact, however had not yet arrived on the scene at the writing of this report. [The licensee] has been provided department emails to send police reports when they are received."
Florida Incident Number: FL23-064
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 report was received from the State of Florida Bureau of Radiation Control [BRC] via email:
"At 1720 [EDT], BRC received a call from [the licensee]. [The licensee] stated two Troxler [soil moisture density] gauges [Model Numbers 3440 and 3430; Serial Numbers 20750 and 77517; and sources 8mCi Cs-137 and 40mCi Am-241/Be] were stolen from their storage facility in Lake Placid, FL. [The] gauges were last signed in to the facility on the 28th of April and sat idle. [The] exact time of loss is not currently known, but [the licensee] went to retrieve the gauges on 5/2/23 at 1700 [EDT]. Law enforcement was notified prior to BRC's contact, however had not yet arrived on the scene at the writing of this report. [The licensee] has been provided department emails to send police reports when they are received."
Florida Incident Number: FL23-064
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: 56500
Rep Org: OR Dept of Health Rad Protection
Licensee: Sacred Heart Medical Center
Region: 4
City: Springfield State: OR
County:
License #: 90270
Agreement: Y
Docket:
NRC Notified By: Hillary Haskins
HQ OPS Officer: John Russell
Licensee: Sacred Heart Medical Center
Region: 4
City: Springfield State: OR
County:
License #: 90270
Agreement: Y
Docket:
NRC Notified By: Hillary Haskins
HQ OPS Officer: John Russell
Notification Date: 05/02/2023
Notification Time: 19:20 [ET]
Event Date: 05/01/2023
Event Time: 18:56 [PDT]
Last Update Date: 05/02/2023
Notification Time: 19:20 [ET]
Event Date: 05/01/2023
Event Time: 18:56 [PDT]
Last Update Date: 05/02/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Gaddy, Vincent (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Gaddy, Vincent (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - MEDICAL UNDERDOSE
The following information was provided by the Oregon Health Authority via email:
"Upon completion of [Yttrium] Y-90 Therasphere delivery [to a patient] and completion of post-treatment template measurements, it was noted that the delivery ratio appeared to be below 80%. The technologist who was involved in delivery contacted the authorized user who came and reviewed the information. Both the authorized user and Boston Scientific representative, who was present during delivery, felt that an error had been made in post-treatment measurements, so they were repeated both that day and the following.
"Nuclear medicine staff performed [single photon emission computed tomography with a computed tomography] SPECT/CT imaging of the Nalgene container. This imaging was reviewed on 5/1/23 and it was determined that activity was remaining in the delivery set tubing. Imaging was reviewed with the Assistant [radiation safety officer] RSO, and it was determined that a Medical Event had occurred. Per [the assistant RSO], the Medical Event was reported to the Oregon Health Authority on 5/2/23.
"The Authorized User, communicated the situation with the patient and is confident that no adverse effect has occurred based on calculated treatment thresholds and tumor burden.
"The authorized user reviewed the SPECT/CT imaging and will participate in mitigation."
A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.
The following information was provided by the Oregon Health Authority via email:
"Upon completion of [Yttrium] Y-90 Therasphere delivery [to a patient] and completion of post-treatment template measurements, it was noted that the delivery ratio appeared to be below 80%. The technologist who was involved in delivery contacted the authorized user who came and reviewed the information. Both the authorized user and Boston Scientific representative, who was present during delivery, felt that an error had been made in post-treatment measurements, so they were repeated both that day and the following.
"Nuclear medicine staff performed [single photon emission computed tomography with a computed tomography] SPECT/CT imaging of the Nalgene container. This imaging was reviewed on 5/1/23 and it was determined that activity was remaining in the delivery set tubing. Imaging was reviewed with the Assistant [radiation safety officer] RSO, and it was determined that a Medical Event had occurred. Per [the assistant RSO], the Medical Event was reported to the Oregon Health Authority on 5/2/23.
"The Authorized User, communicated the situation with the patient and is confident that no adverse effect has occurred based on calculated treatment thresholds and tumor burden.
"The authorized user reviewed the SPECT/CT imaging and will participate in mitigation."
A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.
Power Reactor
Event Number: 56509
Facility: Cooper
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: Curtis Martin
HQ OPS Officer: Adam Koziol
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: Curtis Martin
HQ OPS Officer: Adam Koziol
Notification Date: 05/08/2023
Notification Time: 06:25 [ET]
Event Date: 05/08/2023
Event Time: 02:07 [CDT]
Last Update Date: 05/08/2023
Notification Time: 06:25 [ET]
Event Date: 05/08/2023
Event Time: 02:07 [CDT]
Last Update Date: 05/08/2023
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(i) - Plant S/D Reqd By Ts 50.72(b)(3)(v)(D) - Accident Mitigation
10 CFR Section:
50.72(b)(2)(i) - Plant S/D Reqd By Ts 50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Gaddy, Vincent (R4DO)
Gaddy, Vincent (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 70 | Power Operation |
SHUTDOWN REQUIRED BY TECHNICAL SPECIFICATIONS DUE TO INOPERABLE CORE SPRAY
The following information was provided by the licensee via fax:
"At time 0207 CDT, Cooper Nuclear Station entered Technical Specification [Limiting Condition for Operation] LCO 3.0.3 due to declaring Core Spray Subsystems A and B inoperable. This declaration was based on an issue with relays installed from the same manufacturing batch. The ability of the relays to function correctly to annunciate loss of logic power was called into question and they were declared inoperable. The plant has initiated actions to repair/replace affected relays.
"This event is reportable under 10 CFR50.72(b)(2)(i) as initiation of any nuclear plant shutdown required by Technical Specifications. In addition, this event Is reportable under 10 CFR 50.72(b)(3)(v) as a condition that could have prevented the fulfillment of a safety function for the Core Spray systems.
"NRC Resident Inspector was notified."
* * * UPDATE ON 5/8/2023 AT 1335 EDT FROM ANDREW ASKINS TO BRIAN LIN * * *
The following information was provided by the licensee via email:
"Technical Specification LCO 3.0.3 was exited at 0805 CDT on May 8, 2023. A reasonable expectation of operability was developed for the Core Spray Subsystems A and B. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. Shutdown was initiated and power was reduced approximately 45 percent. Reactor power is currently at 55 percent at the time of notification."
Notified R4DO (Werner) via email.
The following information was provided by the licensee via fax:
"At time 0207 CDT, Cooper Nuclear Station entered Technical Specification [Limiting Condition for Operation] LCO 3.0.3 due to declaring Core Spray Subsystems A and B inoperable. This declaration was based on an issue with relays installed from the same manufacturing batch. The ability of the relays to function correctly to annunciate loss of logic power was called into question and they were declared inoperable. The plant has initiated actions to repair/replace affected relays.
"This event is reportable under 10 CFR50.72(b)(2)(i) as initiation of any nuclear plant shutdown required by Technical Specifications. In addition, this event Is reportable under 10 CFR 50.72(b)(3)(v) as a condition that could have prevented the fulfillment of a safety function for the Core Spray systems.
"NRC Resident Inspector was notified."
* * * UPDATE ON 5/8/2023 AT 1335 EDT FROM ANDREW ASKINS TO BRIAN LIN * * *
The following information was provided by the licensee via email:
"Technical Specification LCO 3.0.3 was exited at 0805 CDT on May 8, 2023. A reasonable expectation of operability was developed for the Core Spray Subsystems A and B. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. Shutdown was initiated and power was reduced approximately 45 percent. Reactor power is currently at 55 percent at the time of notification."
Notified R4DO (Werner) via email.