In retrospective dosimetry, the total dose absorbed by some pre-existing dosemeters, such as house bricks or tiles, is used to derive the dose to the population arising from a nuclear accident. This paper uses the newly developed SAR protocol to determine the total dose in young house bricks from the vicinity of the Chernobyl reactor site and from Roskilde, Denmark. For these samples, it is shown that high precision (similar to 1%) on the mean estimates of total dose can be achieved with similar to 20 independent measurements. The SAR total dose estimates of two Danish house bricks agree with the expected values based on their known age and confirms the absolute accuracy of the SAR method. It is concluded that a similar to 18 mGy fallout dose component can be detected on a background of similar to 100 mGy; this detection limit is controlled by uncertainties in the natural dose rare measurement rather than in the estimation of total dose.
|Journal||Radiation Protection Dosimetry|
|Publication status||Published - 1999|