Notice of a potential defect in InstroTek 3500 Xplorer portable gauges
Some licensees have reported to the CNSC that InstroTek 3500 Xplorer portable gauges may be subject to a manufacturing defect. When retracted, the source rod may come out of the device if someone simply pulls on the rod. This defect affects only the portable gauges with serial numbers ranging from 3200 to 3289. If you have an InstroTek 3500 Xplorer portable gauge with a serial number in this range, the CNSC advises you to contact the Canadian distributor, Stuart Hunt & Associates Ltd., by email at email@example.com or by telephone at 1-800-661-4599. The CNSC also recommends that you stop using the gauge until it has been inspected and/or repaired.
Gauges are used in industries such as agriculture, construction and civil engineering to measure moisture and compaction levels in soil and asphalt density in paving mixes.
To do these measurements, two types of radiation are used in gauges: gamma (such as cesium-137) and neutron (such as americium-241/beryllium).
Portable gauge licensees must ensure that doses are kept as low as reasonably achievable (ALARA). The CNSC facilitates this by regulating the use of radiation devices, by assessing radiation protection programs, and by regularly inspecting licensees to ensure compliance with the regulations and licence conditions.
Portable gauge users must ensure that they safely conduct their work and comply with all applicable regulatory requirements. Their safety – as well as the safety of the public and the environment – depends at all times on a high level of radiation safety.
Gauge users must comply with the radiation protection program established by their employer, in accordance with regulatory requirements. Risks that may jeopardize the integrity, safety or security of gauges, safe operations or radiation detection instruments have to be duly considered and mitigated.
Each portable gauge must be either under the constant surveillance of a worker, or secured in a transport vehicle or at the storage location.
Listed here are some useful tools and resources that provide guidance on the safe handling and use of portable gauges:
- Working Safely with Portable Gauges (booklet; replaces the 2007 edition)
- Stay safe working with portable nuclear gauges (short safety video)
- Responding to Accidents Involving Portable Gauges (PDF)
- Proper Care and Use of Personal Dosimeters (PDF)
- Nuclear Safety and Control Act
- General Nuclear Safety and Control Regulations
- Radiation Protection Regulations
- Nuclear Substances and Radiation Devices Regulations
- Packaging and Transport of Nuclear Substances Regulations, 2015
- Nuclear Security Regulations
- Nuclear Non-proliferation Import and Export Control Regulations
- Canadian Nuclear Safety Commission Cost Recovery Fees Regulations
Organizations that want to make related services available to portable gauge licensees can submit their contact information to the CNSC by filling out a service provider form. Information will be published on the CNSC website once received. The CNSC provides this information to licensees for information purposes only; it does not endorse or recommend any of the organizations listed.
Additional CNSC resources
- G-129, Keeping Radiation Exposures and Doses “As Low as Reasonably Achievable (ALARA)” (PDF)
- G-91, Ascertaining and Recording Radiation Doses to Individuals (PDF)
Need more information?
If you have any questions about portable gauges, email the CNSC or call 1-888-229-2672.
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