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Event Notification Report for June 01, 2020

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
5/29/2020 - 6/1/2020

** EVENT NUMBERS **


54723 54731

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Agreement State Event Number: 54723
Rep Org: TEXAS DEPT OF STATE HEALTH SERVICES
Licensee: Alliance Geotechnical Group Inc.
Region: 4
City: Dallas   State: TX
County:
License #: L 05314
Agreement: Y
Docket:
NRC Notified By: Art Tucker
HQ OPS Officer: Brian P. Smith
Notification Date: 05/21/2020
Notification Time: 16:39 [ET]
Event Date: 05/21/2020
Event Time: 00:00 [CDT]
Last Update Date: 05/21/2020
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
RYAN ALEXANDER (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB (EMAIL)
- CNSNS (MEXICO) (FAX)
This material event contains a "Less than Cat 3" level of radioactive material.

Event Text

AGREEMENT STATE REPORT - STOLEN MOISTURE DENSITY GAUGE

The following was received via email:

"On May 21, 2020, the Agency (Texas Department of State Health Services) was contacted by the licensee's radiation safety officer (RSO) and notified that a Humboldt 5000 EZ moisture/density gauge had been lost by one of its technicians. The gauge contained a 40 milliCuries americium-241 source and a 10 milliCuries cesium-137 source. The RSO stated the technician had completed a job and placed the gauge back in the transport case. After completing their paperwork, they got into the cab of their truck and drove off, leaving the tailgate down and the gauge on the tailgate. The gauge came off at the intersection which was at a farmers' market. The technician drove to the next job site and discovered the gauge was missing. The technician backtracked and started looking for the gauge. The technician found an individual at the farmers' market that saw the gauge fall off the truck and someone pull up, grab the gauge, and drive off. The individual took a picture of the vehicle and captured part of the license plate. The technician contacted the RSO who responded to that location. The licensee contacted local law enforcement. The RSO stated the cesium source rod was locked in the shielded position, but was not sure if the transport case was locked. Additional information will be provided as it is received in accordance with SA-300."

Texas event number I-9770

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

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Power Reactor Event Number: 54731
Facility: Seabrook
Region: 1     State: NH
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: Jack Connolly
HQ OPS Officer: Brian P. Smith
Notification Date: 05/29/2020
Notification Time: 16:41 [ET]
Event Date: 05/29/2020
Event Time: 14:03 [EDT]
Last Update Date: 05/29/2020
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical
Person (Organization):
JOSEPH DEBOER (R1DO)
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 M/R Y 100 Power Operation 0 Hot Standby

Event Text

MANUAL TRIP DUE TO ROD BANK UNEXPECTEDLY INSERTING

"At 1403 EDT, with the unit in Mode 1 and 100 percent power, the reactor was manually tripped due to Group 1 of Control Rod Bank 'B' unexpectedly inserting. All systems responded normally post-trip. Operations stabilized the plant in Mode 3 at 557 degrees Fahrenheit. Decay heat removal is being accomplished via the steam dumps in the steam pressure mode to the main condenser. Emergency feedwater actuated due to low low steam generator level as expected.

"This event is being reported pursuant to 10 CFR 50.72(b)(2)(iv)(B) and 10 CFR (b)(3)(iv)(A). The NRC Senior Resident Inspector has been notified."


Page Last Reviewed/Updated Monday, June 01, 2020
Monday, June 01, 2020