To know where you might find radioactive sources at UBC, look for this symbol:

This trefoil symbol makes us aware of a potential for exposure to radiation. This includes work areas, waste and storage facilities, and all packages and shipments which contain radioactive materials.

Three essential principles are used to protect you from radiation. These are based on:

Time

The shorter the period of exposure to radiation, the less radiation will be absorbed. When possible, people who work in radiation areas should reduce the time that they spend near radioactive sources.

Distance

The intensity of ionizing radiation rapidly decreases with increasing distance from the source. By increasing the distance from a radioactive source, the amount of exposure is reduced.

Shielding

People working with or near radiation sources are protected by barriers which are effective in reducing or eliminating their exposure to radiation fields. Protective clothing also provides protection against contamination from radioisotopes.

Protection Measures at UBC

Several measures are in place to ensure that nuclear materials are used in the proper manner and only by qualified individuals at UBC:

• All authorized personnel must be trained by UBC in the safe use of radiation before starting any work involving radiation, in any amount.
• Acquisition of nuclear materials is controlled through a specific online purchasing system that is closely monitored by the radiation safety office.
• Annual inspections are conducted at all licensed areas at UBC to ensure compliance with the federal regulations.
• UBC storm sewer outflows are regularly tested to monitor for the improper disposal of radiation.
• Workers who have a reasonable probability of receiving a dose of more than 1 mSv/year are designated as nuclear energy workers (NEWs) and are required to enroll in a dosimetry program to monitor their exposure. Dosimetry reports are reviewed by the Radiation Safety Office to ensure that excess exposures are avoided.
• A thyroid monitoring program is in place for individuals who work with high levels of specific isotopes at UBC.
• A documented security plan is in place to meet the requirements of the CNSC security audits.

For additional information, review Understanding Radiation (Canadian Nuclear Safety Commission, 2002).

Contact the Radiation Safety Office for more information at 604.822.7052.