Real-time assessment of exposure dose to workers in radiological environments during decommissioning of nuclear facilities

•The method of exposure dose assessment to workers during decommissioning of nuclear facilities.•The environments of simulation were designed under a virtual reality.•To assess exposure dose to workers, human model was developed within a virtual reality. This objective of this paper is to develop a method to simulate and assess the exposure dose to workers during decommissioning of nuclear facilities. To simulate several scenarios, decommissioning environments were designed using virtual reality. To assess exposure dose to workers, a human model was also developed using virtual reality. The exposure dose was measured and assessed under the principle of ALARA in accordance with radiological environmental change. This method will make it possible to plan for the exposure dose to workers during decommissioning of nuclear facilities.