The Canadian Radiological Monitoring Network – Environmental Dosimetry
This dataset provides the background radiation dose results from Health Canada’s Canadian Radiological Monitoring Network (CRMN) monitoring sites. More information about the CRMN network can be found here: http://www.hc-sc.gc.ca/ewh-semt/contaminants/radiation/crmn-rcsr/index-eng.php.
This background radiation data contains both “monitoring” and “transit” dosimeters starting in 2015. The historical background radiation dose data can be found here: http://open.canada.ca/data/en/dataset/dc69b741-bcd4-4e0c-a3d3-f25bf9f34f03. A transit dosimeter is sent along with the monitoring dosimeter to determine if there is a significant dose recorded by the dosimeter while it is in transit to the sampling station. The transit dosimeter is shipped out with a station monitor, and shipped back with the station monitor from the previous quarter. The monitoring dosimeters are deployed over a longer time (around three months) than the transit dosimeters (around 3 weeks). This difference largely explains the lower recorded dose values for the transit dosimeter. The results provided for the monitoring and transit dosimeters are expressed as ambient dose equivalent to a cesium source, in units of millisieverts (mSv). The measured quarterly dose, which includes the transit time from and to our Ottawa location, is then normalised by dividing by the number of days in the field and multiplying by 30 days. This is the value that is displayed in the graphs. The external dose can be attributed almost exclusively to natural radiation (of terrestrial and cosmic origin) with fluctuations based on several factors including location, soil characteristics, and seasonal changes.
- Publisher - Current Organization Name: Health Canada
- Licence: Open Government Licence - Canada