Article · Health & safety
NORM and TENORM: radiation safety in mineral processing
Naturally Occurring Radioactive Material (NORM) is present in many mineral deposits, including the rare earth and ion-adsorption clay resources we work with. Industrial processing can concentrate it into Technologically Enhanced NORM (TENORM). Understanding the hazard, monitoring it and managing exposure is a basic responsibility for any operator in this industry.
A note on this article
This is a general orientation, not a site-specific safety plan or regulatory submission. Local regulations, deposit chemistry and process design all change the exact controls needed. We publish it because being clear about hazards is part of operating responsibly, not because it replaces qualified health physics advice.
Health hazards
NORM containing uranium, thorium and potassium is found everywhere in the natural environment at low, safe concentrations. The risk arises when industrial processes concentrate it above background levels.
- Internal hazard
- Inhalation or ingestion of radioactive dust particles is the most significant risk during cutting, grinding, crushing or vessel cleaning. Alpha and beta particles emitted from dust can damage tissue when taken into the body.
- Radon gas inhalation
- Radium decay releases invisible radon gas. In unventilated or confined spaces it can accumulate, significantly increasing lung cancer risk over long exposure periods.
- External gamma exposure
- Unlike alpha particles, gamma radiation can penetrate the body from a distance. Concentrated industrial scale or tank sludge can produce measurable gamma fields that require shielding or distance controls.
- Chronic low-dose risks
- Long-term exposure increases the statistical likelihood of cancer or genetic damage. There is no entirely zero-risk threshold, which is why exposure is managed to the lowest reasonably achievable level.
Where TENORM appears
Several industries routinely handle NORM that can become technologically enhanced. In rare earth and mineral processing the relevant contexts include:
- Mining and ore processing: Extracting metal, crushing rock and handling mineral feedstocks brings deep-earth radioactive elements to the surface.
- Oil and gas production: Radionuclides dissolve in reservoir fluids and precipitate as high-density radioactive scale inside equipment and tanks.
- Geothermal and coal energy: Combustion or brine extraction leaves concentrated radioactive ash and residual waste.
- Water treatment: Filtering natural groundwaters can concentrate radium onto filtration media over time.
Risk management and protection
NORM management follows the ALARA principle: keeping exposures As Low As Reasonably Achievable. In practice this means a layered control programme rather than a single fix.
- Workplace monitoring
- Regular testing with gamma spectroscopy and area monitors ensures concentrations stay below safety thresholds and that controls are working as designed.
- Personal protective equipment
- Respirators, disposable coveralls and gloves prevent internal contamination from dust and fluids during maintenance, cleaning and sampling.
- Regulated waste handling
- Industrial NORM waste cannot go into regular landfill. It is subject to strict disposal protocols enforced by regional regulators, in Canada guided by the Canadian Nuclear Safety Commission and Health Canada, and implemented at the provincial level by bodies such as the BC Energy Regulator and WorkSafeBC.
Corporate responsibility
For a rare earth processing venture, NORM is not an abstract issue. Many deposits contain thorium and uranium in the mineral matrix. We treat radiation safety as a design input, not an afterthought: process layout, ventilation, dust suppression and waste-stream routing are all evaluated for their effect on exposure. That is the standard we hold ourselves to, and the standard we expect any responsible operator in this industry to meet.