DECOMMISSIONING OF THE ICI TRIGA MARK I REACTOR

摘要

This paper considers the fuel removal, transportation and subsequent decommissioning of the ICI Triga Mark I Reactor at Billingham, UK. This work was carried out on behalf of ICI by BNFL Waste Management and Decommissioning. The decommissioning methodology was considered in the four stages to be described; namely Preparatory Works, Reactor Defuelling, Intermediate Level Waste Removal and Low Level Waste Removal. This paper describes the principal methodologies involved in the defuelling of the reactor and subsequent decommissioning operations, highlighting in particular the design and safety case methodologies used in order to achieve a solution which was completed without incident or accident and resulted in a cumulative radiation dose to personnel of only 1.57mSv.