Radiological Risk Assessments and Specialist Dosimetry
Neil Seymour is a Principal Measurement Technician at GE HealthCare , based at The Grove Centre in Amersham . In this article he describes the application of specialist dosimetry techniques in the production of Radiological Risk Assessments , with thanks for contributions from the UKHSA ( United Kingdom Health Security Agency ).
previous versions of the IRRs for “ prior risk assessments ”.
The figures derived from RRAs can be compared with the actual doses recorded during a task using dosemeters . In many cases it is sufficient to monitor the whole body dose using devices such as a body TLD ( Thermoluminescent Dosemeter ), but in some cases specialist dosemeters are required .
When the Ionising Radiations Regulations ( IRRs ) were updated in 2017 , one of the major changes was the introduction of Regulation 8 , which requires employers to conduct Radiological Risk Assessments ( RRAs ) to estimate doses to which personnel can be exposed . This replaced the requirement in
The most obvious and commonly used is the extremity TLD . These take the form of a ring , finger stall or ankle straps worn when the extremities ( hands and feet ) could get more radiation dose than the rest of the body . They measure the dose of the extremities at an equivalent skin depth of 0.07 mm .
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