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RR385 - Adequacy of external dosimetry methods and suitability of personal dosemeters for workplace radiation fields

Under the Ionising Radiations Regulations 1999 and the Radiation (Emergency Preparedness and Public Information) Regulations 2001 (REPPIR), HSE approves dosimetry services to carry out a number of specified functions. There are a number of dosemeter types and dosimetry methods by which ionising radiation doses can be assessed. However, not all types of dosemeter/dosimetry methods are adequate or suitable for the different types of radiation fields or conditions. The main duty holder under IRR99 is the employer and it is their responsibility to appoint a dosimetry service which is suitable for their work. In addition, HSE assessors must consider aspects of adequacy when assessing dosimetry services.

There are many different industries that make use of approved dosimetry services. The approved dosimetry services only provide information on the types of dosemeters which they supply. Similarly manufacturers of dosemeters and dosimetry systems only provide type test data on the dosemeters they manufacture, for specific radiation types, energies and environmental conditions. The criteria chosen vary with the manufacturer, making it difficult for dosimetry services and employers to assess the suitability of the different types of dosemeters for the types of radiations and radiation field conditions in the workplace.

This report gives information on dosemeters/dosimetry methods currently available in the UK and information on workplace fields.

This report and the work it describes were funded by the Health and Safety Executive (HSE). Its contents, including any opinions and/or conclusions expressed, are those of the authors alone and do not necessarily reflect HSE policy.

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Updated 2010-03-19