Archive of Radon progeny monitoring data

Radon progeny monitoring 2011

The graphs below show hourly and quarterly average radon progeny PAEC in air at Jabiru town and near Mudginberri community in 2011. Gaps in the data are due to instrument maintenance and data quality issues. Data from previous years are available in Supervising Scientist Annual Reports.

Radon progeny PAEC in air at Jabiru town

The black dots are the hourly PAEC measurements and the grey columns are the quarterly average PAEC values.

Radon progeny PAEC in air near Mudginberri community

The black dots are the hourly PAEC measurements and the grey columns are the quarterly average PAEC values.

Public dose estimates

The table below gives the annual average radon progeny PAEC in air and the estimated total and mine-related public doses for 2011 for Jabiru town and near Mudginberri community. The total dose includes contributions from both natural background and mine-related sources of radon progeny in air. The mine-related dose has been determined by correlating hourly PAEC measurements with wind direction data from the Bureau of Meteorology weather station located at Jabiru Airport.

The annual effective dose to the public from mine-related radon progeny in air at both Jabiru town and Mudginberri in 2011 was only a small fraction of the annual dose limit of 1 mSv for the public. Although the dose limit applies to the sum of doses received from all above background sources and exposure pathways, it is clear that there was no unacceptable radiation risk to the public at Jabiru town or Mudginberri community from radon progeny in air that may have originated from the Ranger mine.

Annual average radon progeny PAEC in air and public dose estimates for 2011

 

Jabiru town

Mudginberri

Annual average PAEC (µJ/m3)

0.019

0.022

Total dose (mSv)

0.179

0.210

Mine-related dose (mSv)

0.021

0.003

 

Radon progeny monitoring 2012

The graphs below show hourly and quarterly average radon progeny PAEC in air at Jabiru town and near Mudginberri community in 2012. Gaps in the data are due to instrument maintenance and data quality issues. Data from previous years is available in Supervising Scientist Annual Reports.

Explanatory notes on radon and radon progeny, including the method of dose calculation, are available here.

Radon progeny PAEC in air at Jabiru town

The black dots are the hourly PAEC measurements and the grey columns are the quarterly average PAEC values.

Radon progeny PAEC in air near Mudginberri community

The black dots are the hourly PAEC measurements and the grey columns are the quarterly average PAEC values.

Public dose estimates

The table below gives the annual average radon progeny PAEC in air and the estimated total and mine-related public doses for 2012 for Jabiru town and near Mudginberri community. The total dose includes contributions from both natural background and mine-related sources of radon progeny in air. The mine-related dose has been determined by correlating hourly PAEC measurements with wind direction data from the Bureau of Meteorology weather station located at Jabiru Airport.

The annual effective dose to the public from mine-related radon progeny in air at both Jabiru town and Mudginberri in 2012 was only a small fraction of the annual dose limit of 1 mSv for the public. Although the dose limit applies to the sum of doses received from all above background sources and exposure pathways, it is clear that there was no unacceptable radiation risk to the public at Jabiru town or Mudginberri community from radon progeny in air that may have originated from the Ranger mine.

Annual average radon progeny PAEC in air and public dose estimates for 2012

 

Jabiru town

Mudginberri

Annual average PAEC (µJ/m3)

0.040

0.039

Total dose (mSv)

0.386

0.372

Mine-related dose (mSv)

0.030

0.005