Calculators & data

D-values are used by the Environment Agency (EA), SEPA and the UK police advisers (CTSA) to determine the source category and appropriate security measures for sealed sources, where this cannot be assessed directly from the use/practice. D (Danger) values are in TBq, and the quotient A/D (where A is the activity of a source in TBq) are used to determine source category. In the UK some sources are already categorised for security and this will then take precedence over A/D. For those into dosimetry calculations and assessments behind D values, section 3 onwards explain in detail how the values are derived.

EPCARD stands for 'European Program Package for the Calculation of Aviation Route Doses'. This comprehensive online calculator is produced by the GSF-National Research Center for Environment and Health (Germany). You can calculate cosmic radiation dose received en route between any two airports (on any given day), or the dose rate in the plane for a given elevation and position.

An online calculator for undertaking all manner of radiation safety related calculations.