Event Notification Report for October 20, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/19/2024 - 10/20/2024
EVENT NUMBERS
57392
57392
Agreement State
Event Number: 57392
Rep Org: California Radiation Control Prgm
Licensee: Sequoia Consultants Inc.
Region: 4
City: Carlsbad State: CA
County:
License #: 7597-30
Agreement: Y
Docket:
NRC Notified By: Robert Greger
HQ OPS Officer: Bill Nytko
Licensee: Sequoia Consultants Inc.
Region: 4
City: Carlsbad State: CA
County:
License #: 7597-30
Agreement: Y
Docket:
NRC Notified By: Robert Greger
HQ OPS Officer: Bill Nytko
Notification Date: 10/21/2024
Notification Time: 00:46 [ET]
Event Date: 10/20/2024
Event Time: 03:30 [PDT]
Last Update Date: 10/21/2024
Notification Time: 00:46 [ET]
Event Date: 10/20/2024
Event Time: 03:30 [PDT]
Last Update Date: 10/21/2024
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Taylor, Nick (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Taylor, Nick (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - DAMAGED MOISTURE DENSITY GAUGE
The following information was provided by the California Radiologic Health Branch via email:
"Sequoia Consultants were using a moisture density gauge on a construction site on the south of on-ramp to the I-5 freeway in the early morning on Sunday, October 20, 2024. The on-ramp was closed with cones and a California Highway Patrol vehicle stationed at the site. At approximately 0330 PDT, a car drove through the cones and hit the Sequoia technician carrying the moisture-density gauge.
"The moisture density gauge was severely damaged with the source rod broken off. The Cs-137 source was in the shielded position and the impact jammed it in place. The remainder of the gauge was in multiple pieces. No radioactive contamination was detected at the site, and radiation levels were indicative of a shielded source. The damaged gauge parts, including the two sources, were transported to the Sequoia office."
California 5010 Number: 102024
The following information was provided by the California Radiologic Health Branch via email:
"Sequoia Consultants were using a moisture density gauge on a construction site on the south of on-ramp to the I-5 freeway in the early morning on Sunday, October 20, 2024. The on-ramp was closed with cones and a California Highway Patrol vehicle stationed at the site. At approximately 0330 PDT, a car drove through the cones and hit the Sequoia technician carrying the moisture-density gauge.
"The moisture density gauge was severely damaged with the source rod broken off. The Cs-137 source was in the shielded position and the impact jammed it in place. The remainder of the gauge was in multiple pieces. No radioactive contamination was detected at the site, and radiation levels were indicative of a shielded source. The damaged gauge parts, including the two sources, were transported to the Sequoia office."
California 5010 Number: 102024