The role of public engagement in the journey to ALARA

The 'As Low As Reasonably Achievable' (ALARA) principle is one of the three fundamental elements of radiation protection. Noting that ionising radiation is both encountered naturally in the environment as part of everyday life, and artificially as part of a range of practices, the ALARA principle aims to provide a means of optimising radiation exposures. Historically, the stakeholders involved in the application of the ALARA process have primarily been assumed to be internal to an organisation, except for regulatory 'buy in'. However, could there be instances when the public should be a key stakeholder? This paper explores the area of perceived risk with reference to a particular case study in which the dredging of non-hazardous sediment in the UK near a now decommissioned nuclear power station raised substantial public concern about radiological exposure. This turned what was a straightforward construction activity into a complex public engagement and reassurance task, at a significant cost disproportionate to the level of radiological risk. Learning from this case study is used to highlight the key lessons learnt and the importance of public engagement, and how perceived risk and the associated societal stress could be incorporated into the ALARA process. The paper also highlights the ongoing work and guidance produced by the Society for Radiological Protection in the UK on the development of Guidance for Practitioners to support the Communication of Radiation Risk.