Desenvolvimento de um plano preliminar de descomissionamento de um navio com uma planta de potência nuclear embarcada

Abstract

The use of nuclear energy would be a feasible option to reduce the greenhouse gases emission by merchant ships; however, decommissioning brings high costs, which affect the economic feasibility. The experience from US Navy indicates that the decommissioning cost, after the establishment of a well-defined process, is close to 25% of the reactor cost. Nevertheless, the experience the Royal Navy that postponed the decommissioning highlights a cost much higher, showing that a good planning decreases cost and delays. Therefore, it is important to develop a good recycling policy after deactivation of a ship with nuclear-power propulsion. The objective of this work is to propose a decommissioning method for nuclear propulsion ships through a survey bringing the experience and feedback from other countries about this subject. Furthermore, beyond a simple decommissioning process, which is following the standards from Nuclear Regulation, this work found design and base requirements, which would bring economic benefits to a nuclear facility. The maximum potential gain with the adoption of the proposed method and the fulfilment of the identified requirements would be 10.3% savings on the price of the energy sold to the consumer. Still, there are additional costs in the project whose estimate are, sometimes, difficult to obtain.

Desenvolvimento de estratégias para descomissionamento de reatores nucleares de pequeno porte no Brasil

“…do Ms. Adalberto Rodrigues Sobreiro Junior [22] e do Ms. Ary de Souza Vivas [23]. A análise desses estudos nacionais permitiu obter uma perspectiva mais específica do contexto brasileiro e agregar informações relevantes para a compreensão das estratégias e desafios envolvidos no descomissionamento de reatores nucleares em um contexto nacional.…”