Ionising radiations regulations dose limits

Ionising radiation occurs naturally as well as from man-made processes and about 87% of all radiation exposure is from natural sources. The Ionising Radiations Regulations 1999 specify a range of dose limits, some of which are given in Table 17.8. 

The primary aim of the Ionising Radiation Regulations and the associated Approved Code of Practice and Guidance (Reference 12.4) is to establish a framework for ensuring that exposure to ionising radiation arising from work activities, whether from man-made or natural radiation and from external radiation or internal radiation is kept as low as reasonably practicable (ALARP) and does not exceed legal dose limits specified for individuals. 

The Nil SAPs (Reference 12.3) assign levels and objectives for radiation doses to individuals and groups these are the basic safety levels (BSLs) and the basic safety objectives (BSOs), respectively. These encompass the legal limits defined in the Ionising Radiation Regulations. Between the BSL and the BSO, designers and operators, need to justify that the dose is ALARP. The ALARP principle will be applied below the BSO. 

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See also in sourсe #XX -- [ ]

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