Described are the components and main functions of the automated data processing subsystem for unscheduled measurements of radiological environment introduced at Beloyarsk NPP under the Program for optimizing the radiation protection of JSC “Concern Rosenergoatom”. Given are the results ofjoint studies conducted by experts at Ural Federal University, Beloyarsk NPP, and the Ural Branch of the Russian Academy of Sciences to develop the algorithm of optimizing the radiation supervisor movement routes in non-stationary radiation fields using the database formed as part of the automated data processing subsystem for unscheduled measurements of radiological environment.