Event Notification Report for October 01, 2021

EN Revision Imported Date: 10/1/2021

EN Revision Text: AGREEMENT STATE - DAMAGED DENSITOMETERS

The following information was received via email:

"On Sunday, May 9, 2021 NexTier Completion Solutions, Inc., (NexTier) was conducting fracing operations in Eddy County, New Mexico for XTO Energy. At approximately 1900 MDT a fire at the wellsite damaged equipment including two ThermoFisher Scientific densitometers. Eddy County, Otis, Loving and Malaga fire departments responded to the incident late that evening. The wellsite was secured overnight to allow the damaged equipment to cool.

"The NexTier On-Site RSO, from the Odessa, Texas facility, arrived at the wellsite the morning of May 10, 2021 to visually inspect the damaged densitometers and conduct a radiation survey. The visual inspection revealed each densitometer received heavy heat damage and the results of the survey concluded the lead shielding inside each densitometer had been compromised. It was also confirmed the lead plates on the shutter mechanism of the Model 5190 densitometer had been melted. Leak test samples were collected from each densitometer and sent to NSSI Environmental and Recovery Services, Inc., for emergency assay. A perimeter was set up around each densitometer and all personnel instructed to remain out of the area until the damaged densitometers could be removed. The dose rate at this perimeter was less than 2 millirem per hour.

"After receiving the assay results confirming the source capsules had not been compromised, the Odessa RSO completed the removal of supports and clamps which secured the damaged densitometers to the equipment. Using a large crane, he removed the damaged densitometers, one at a time and placed both in a pre-designated area away from personnel. Bags of barite were placed over the damaged densitometers to reduce dose rates throughout the operation. The area was roped off and marked to keep anyone from entering. Following the removal of the densitometers from the equipment the NexTier Corporate Radiation Safety Officer conducted a survey on and around the equipment using a Ludlum Model 3000 survey meter with a Nal scintillation detector. No readings more than natural background were detected."

Each densitometer contained 0.2 Curie of Cs-137.

EN Revision Imported Date: 10/1/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST AND RECOVERED MOISTURE DENSITY GAUGE

The following information was received via email:

"Earthwork Engineering Group (EEG) reported the loss and recovery of a moisture/density gauge (Seaman Nuclear model C-300, serial #21279) that contained a 1.48 GBq (40 mCi) Am-Be source (AEA Technologies model AMNV.997) and a 0.333 GBq (9 mCi) Cs-137 source (AEA Technologies model CDC.800).

"An EEG employee was contacted by personnel at a job site (believed to be a city inspector) in Albuquerque, New Mexico, on 7/17/2018. The EEG employee was informed that a gauge was left at the job site. The gauge had apparently fallen off the back of the truck. The employee immediately returned to the job site, secured the gauge, and placed it in the shipping container.

"The gauge was out of EEG's control for between 20 and 30 minutes. The gauge was inspected for cracks and leaks. No damage was observed. The employment of the involved employee was terminated for not securing the gauge as trained."

NMED Item No.: 180513

EN Revision Imported Date: 10/1/2021

EN Revision Text: AGREEMENT STATE REPORT - LOST AND RECOVERED MOISTURE DENSITY GAUGE

The following information was received via email:

"The Radiation Safety Officer (RSO) of Design Technologies was notified at approximately 1600 MDT on 3/30/2020 by the technician that that the technician had lost a Troxler model 3411-B, serial number 7085, moisture density gauge out of the back of his truck. The gauge contains 9 millicuries of Cs-137 and 44 millicuries of Am241/Be.

"The technician claims that while on a paving project at the location, he was discussing a rolling pattern with the roller operator and sat the gauge in the bed of his truck with the tailgate down. The foreman then came by and told the technician that he could leave for the day. The technician then got in his truck and drove back to the office without securing the gauge. When the technician arrived at the office, he then realized the gauge was missing from the truck. The technician and the RSO quickly got in the truck to retrace his route from the jobsite to the office in search of the gauge. After searching for the gauge, the RSO then called the New Mexico State Police to report the lost gauge. The search continued until dark along the route until the next morning, 3/31/2020, at daylight.

"The RSO received a phone call from a local contractor in Las Cruces. The contractor stated that he was behind the technician as they were both making a 90 degree right turn onto Taylor Road from North Valley Drive when the gauge slid off the tailgate. The contractor knew what the gauge was and picked it up and put it in the back of his truck. The contractor then tried to track down the technician but could not find him. The contractor contacted the company that calibrates and leak tests our gauges whom the RSO had already notified and they provided the phone number.

"The contractor contacted the RSO and said the gauge was in good condition and its handle was in the shielded position. The RSO placed the gauge in its case, secured it, and brought it back to the office. Upon arriving at the office, the RSO inspected the gauge to the best of his ability, placed it on the standard block and performed a standardization count. The gauge has been placed out-of-service and a leak test was performed as a precautionary measure before the gauge was put back into service."

New Mexico Item No.: NM200011

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

EN Revision Imported Date: 10/1/2021

EN Revision Text: MISSING SEALED SOURCES

The following is a summary of a phone call with the physicist at the licensee:

The licensee reported that two small sealed sources (Ge-68, roughly 0.7 mCi each) were discovered to be missing from a mobile PET-CT coach that was parked at a location in Rensselaer, IN. This coach was being refurbished at this site. The sources were discovered missing by a service engineer working on the PET-CT unit on 9/13/2021. The entire facility was thoroughly searched with a GM survey meter and the sources could not be located.

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

EN Revision Imported Date: 10/1/2021

EN Revision Text: AGREEMENT STATE REPORT - UNDERDOSE OF Y-90 THERASPHERES

The following information was received via email:

"Louisiana Department of Environmental Quality (LDEQ) was notified by the St. Tammany Parish Hospital Director of Radiology via the LDEQ Radiation Hotline at approximately 0915 CDT on September 24, 2021, concerning a medical event which took place at the licensee's facility between 1500 and 1600 CDT on September 22, 2021. According to the Director of Radiology, the patient received 366.2 Gray of the radiation dose of Y-90 TheraSpheres, instead of the prescribed radiation dose of 720 Gray, which is more than 20 percent below the prescribed dose.

"The facility Physicist was notified by the Director of Radiology concerning the above medical event on or about 1600 CDT on September 22, 2021. The Physicist in turn notified the hospital Radiation Safety Officer (RSO), who notified the hospital administration concerning the medical event at approximately 0955 CDT on September 23, 2021. According to the Physicist (during a conference call with LDEQ), the remaining Y-90 dose was not shunted, but remained within the TheraSphere kit. According to the Director of Radiology and the Physicist, the prescribing physician stated the patient nevertheless received an adequate therapeutic dose of Y-90."

LDEQ Event Report ID No.: LA 20210008

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.

EN Revision Imported Date: 10/1/2021

EN Revision Text: AGREEMENT STATE - FIXED GAUGE SHUTTER WILL NOT FULLY CLOSE

The following was received via email:

"On 9/23/2021, the Radiation Safety Officer (RSO) for West Rock Mill Company, LLC in Demopolis, AL reported that a fixed gauge was found to have a defective shutter on 9/22/2021. The RSO reported that the gauge's shutter will not rotate fully to the 'locked off' position. The gauge is still mounted in place until a replacement device and tungsten shielding plate is received. No inadvertent exposures to personnel or members of the public were indicated or reported. The gauge is an Ohmart SHF-1B-45, s/n 4-2425, with a 100 millicurie cesium-137 source, assayed in 1994."

Alabama Event: 21-31