Event Notification Report for September 24, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/23/2024 - 09/24/2024
Power Reactor
Event Number: 57338
Facility: Grand Gulf
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: Joshua Hubbard
HQ OPS Officer: Bill Nytko
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: Joshua Hubbard
HQ OPS Officer: Bill Nytko
Notification Date: 09/25/2024
Notification Time: 02:06 [ET]
Event Date: 09/24/2024
Event Time: 22:04 [CDT]
Last Update Date: 09/25/2024
Notification Time: 02:06 [ET]
Event Date: 09/24/2024
Event Time: 22:04 [CDT]
Last Update Date: 09/25/2024
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Young, Cale (R4DO)
Young, Cale (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 |
HIGH PRESSURE CORE SPRAY INOPERABLE
The following information was provided by the licensee via phone or email:
"On September 24, 2024, at 2204 CDT, Grand Gulf Nuclear Station (GGNS) was conducting surveillance testing on the high pressure core spray (HPCS) division III diesel generator. During testing, the HPCS pump breaker unexpectedly tripped after the HPCS diesel generator started and powered the safety bus. The breaker performed its motor protection function and tripped due to an over-frequency indication.
"The event is being reported in accordance with 10 CFR 50.72(b)(3)(v)(D) as an event or condition which could have prevented the fulfillment of a safety function.
"Troubleshooting is in progress. HPCS, a single-train system, will remain inoperable until the condition is corrected.
"All sources of offsite power are available. No other safety systems are inoperable. Reactor core isolation cooling was verified to be operable per GGNS Technical Specification 3.5.1.B.1.
"The NRC Senior Resident has been notified."
The following information was provided by the licensee via phone or email:
"On September 24, 2024, at 2204 CDT, Grand Gulf Nuclear Station (GGNS) was conducting surveillance testing on the high pressure core spray (HPCS) division III diesel generator. During testing, the HPCS pump breaker unexpectedly tripped after the HPCS diesel generator started and powered the safety bus. The breaker performed its motor protection function and tripped due to an over-frequency indication.
"The event is being reported in accordance with 10 CFR 50.72(b)(3)(v)(D) as an event or condition which could have prevented the fulfillment of a safety function.
"Troubleshooting is in progress. HPCS, a single-train system, will remain inoperable until the condition is corrected.
"All sources of offsite power are available. No other safety systems are inoperable. Reactor core isolation cooling was verified to be operable per GGNS Technical Specification 3.5.1.B.1.
"The NRC Senior Resident has been notified."
Agreement State
Event Number: 57341
Rep Org: New York State Dept. of Health
Licensee: Memorial Sloan Kettering Cancer Center
Region: 1
City: New York State: NY
County:
License #: 75-2968-01
Agreement: Y
Docket:
NRC Notified By: Erik Finkelstein
HQ OPS Officer: Ian Howard
Licensee: Memorial Sloan Kettering Cancer Center
Region: 1
City: New York State: NY
County:
License #: 75-2968-01
Agreement: Y
Docket:
NRC Notified By: Erik Finkelstein
HQ OPS Officer: Ian Howard
Notification Date: 09/26/2024
Notification Time: 11:01 [ET]
Event Date: 09/24/2024
Event Time: 00:00 [EDT]
Last Update Date: 09/26/2024
Notification Time: 11:01 [ET]
Event Date: 09/24/2024
Event Time: 00:00 [EDT]
Last Update Date: 09/26/2024
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Dimitriadis, Anthony (R1DO)
Fisher, Jennifer (NMSS)
NMSS_Events_Notification, (EMAIL)
Dimitriadis, Anthony (R1DO)
Fisher, Jennifer (NMSS)
NMSS_Events_Notification, (EMAIL)
AGREEMENT STATE REPORT - MEDICAL MISADMINISTRATION
The following information was provided by the New York State Department of Health via phone and email:
"Notification was received by phone call on 9/24/24 and email on 9/26/24, from Memorial Sloan Kettering Cancer Center, NYC license number 75-2968-01, of an event that took place (or was discovered) on 9/24/24. They say the event involved a Y-90 microsphere procedure with a dose to a site other than the treatment site that exceeded 0.5 Sv and was 50 percent or more in excess of the dose expected."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The unintended dose was to the stomach and duodenum. The estimated excess dose to the affected tissue was 99 Gy. This information is tentative pending further investigation.
NYC Event Number: NYC-24-0924
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 New York State Department of Health via phone and email:
"Notification was received by phone call on 9/24/24 and email on 9/26/24, from Memorial Sloan Kettering Cancer Center, NYC license number 75-2968-01, of an event that took place (or was discovered) on 9/24/24. They say the event involved a Y-90 microsphere procedure with a dose to a site other than the treatment site that exceeded 0.5 Sv and was 50 percent or more in excess of the dose expected."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The unintended dose was to the stomach and duodenum. The estimated excess dose to the affected tissue was 99 Gy. This information is tentative pending further investigation.
NYC Event Number: NYC-24-0924
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.
Agreement State
Event Number: 57337
Rep Org: Texas Dept of State Health Services
Licensee: East Texas Testing Laboratory, Inc
Region: 4
City: Winona State: TX
County:
License #: L 01423
Agreement: Y
Docket:
NRC Notified By: Arthur Tucker
HQ OPS Officer: Ian Howard
Licensee: East Texas Testing Laboratory, Inc
Region: 4
City: Winona State: TX
County:
License #: L 01423
Agreement: Y
Docket:
NRC Notified By: Arthur Tucker
HQ OPS Officer: Ian Howard
Notification Date: 09/24/2024
Notification Time: 13:07 [ET]
Event Date: 09/24/2024
Event Time: 00:00 [CDT]
Last Update Date: 09/24/2024
Notification Time: 13:07 [ET]
Event Date: 09/24/2024
Event Time: 00:00 [CDT]
Last Update Date: 09/24/2024
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Young, Cale (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
CNSNS (Mexico), - (EMAIL) (EMAIL)
Young, Cale (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
CNSNS (Mexico), - (EMAIL) (EMAIL)
AGREEMENT STATE REPORT - LOST NUCLEAR GAUGE
The following information was provided by the Texas Department of State Health Services (the Department) via phone and email:
"On September 24, 2024, the Department was notified by the licensee that on September 21, 2024, one of its technicians lost a Troxler model 3440 moisture density gauge. The gauge contains a 40 millicurie Am-241/Be source and an 8 millicurie Cs-137 source. The technician had completed work at a temporary job site and placed the gauge on the back of the pickup truck they were using. The technician failed to place the gauge in the transport container. The technician failed to secure the gauge in the truck. The technician drove off the job site and after a short distance realized they had failed to secure the gauge. The technician stopped and found the gauge was no longer in the truck. The technician stated he looked for the gauge but did not find it. The licensee stated the technician brought the empty transport box back to the storage location and left it. The licensee stated that on September 24, 2024, they went to the storage location to use the gauge and found the box was empty. The licensee contacted the technician who stated they had lost the gauge on Saturday. The licensee stated the Cs-137 source rod was not locked in the shielded position. The license stated they will contact the local sheriff office and notify them of the lost gauge. Since the Cs-137 rod was not locked in the shielded position, they can not say with any certainty that the lost sources would not create an exposure risk to any individual."
Texas Incident #: 10131
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 provided by the Texas Department of State Health Services (the Department) via phone and email:
"On September 24, 2024, the Department was notified by the licensee that on September 21, 2024, one of its technicians lost a Troxler model 3440 moisture density gauge. The gauge contains a 40 millicurie Am-241/Be source and an 8 millicurie Cs-137 source. The technician had completed work at a temporary job site and placed the gauge on the back of the pickup truck they were using. The technician failed to place the gauge in the transport container. The technician failed to secure the gauge in the truck. The technician drove off the job site and after a short distance realized they had failed to secure the gauge. The technician stopped and found the gauge was no longer in the truck. The technician stated he looked for the gauge but did not find it. The licensee stated the technician brought the empty transport box back to the storage location and left it. The licensee stated that on September 24, 2024, they went to the storage location to use the gauge and found the box was empty. The licensee contacted the technician who stated they had lost the gauge on Saturday. The licensee stated the Cs-137 source rod was not locked in the shielded position. The license stated they will contact the local sheriff office and notify them of the lost gauge. Since the Cs-137 rod was not locked in the shielded position, they can not say with any certainty that the lost sources would not create an exposure risk to any individual."
Texas Incident #: 10131
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