ERA maintains a comprehensive radiation monitoring programme at the Ranger Mine Site.

ERA's safety and health management systems are certified to AS 4801 and include a comprehensive radiation management system in accordance with the Companies Radiation Policy and Radiation Management Plan.

Monitoring results are compared to limits recommended by the International Commission on Radiological Protection (ICRP) for uranium industry workers.

The ICRP sets two limits for radiation exposure, above that received from natural background or medical exposure, to distinguish between two types of people: members of the public and radiation workers.

  • Members of the public: 1 millisievert (mSv) per year, and
  • Radiation workers: 20 mSv per year over five years with a maximum of 50 mSv in any one year.

ERA employees and contractors whose occupational exposure to radiation may exceed 5 mSv per year are declared 'designated' workers and their exposure is closely monitored.

ERA reports the maximum and mean annual radiation doses in the Annual Radiation Protection and Atmospheric Monitoring report which is submitted to stakeholders each year. As part of ERA practice to have effective and appropriate communication with key stakeholders, including the regulatory authorities, radiation results are subject to review prior to being finalised.

ERA’s radiation results as at 31 December, 2017 were as follows:

ERA Designated Workers

  • Occupational dose limit: 20 mSv per year
  • Number of Designated Workers: 203
  • Maximum annual effective dose: 3.96 mSv
  • Mean annual effective dose: 1.28 mSv

ERA Non-Designated Workers

  • Occupational dose limit: 20 mSv per year
  • Maximum annual effective dose: 1.13 mSv
  • Mean annual effective dose: 0.14 mSv

Members of the Public

  • Member of public dose limit: 1 mSv per year
  • Derived annual effective dose: 0.022 mSv

Click here to see a copy of ERA’s radiation policy.