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Richard I. Foster,박준경,이근영,서범경 한국방사성폐기물학회 2022 방사성폐기물학회지 Vol.20 No.1
The nuclear legacy that remains in the United Kingdom (UK) is complex and diverse. Consisting of legacy ponds and silos, redundant reprocessing plants, research facilities, and non-standard or one-off reactor designs, the clean-up of this legacy is under the stewardship of the Nuclear Decommissioning Authority (NDA). Through a mix of prompt and delayed decommissioning strategies, the NDA has made great strides in dealing with the UK’s nuclear legacy. Fuel debris and sludge removal from the legacy ponds and silos situated at Sellafield, as part of a prompt decommissioning strategy for the site, has enabled intolerable risks to be brought under control. Reactor defueling and waste retrievals across the Magnox fleet is enabling their transition to a period of care and maintenance; accelerated through the adopted ‘Lead and Learn’ approach. Bespoke decommissioning methods implemented by the NDA have also enabled the relevant site licence companies to tackle non-standard reactor designs and one-off wastes. Such approaches have potential to influence and shape nuclear decommissioning decision making activities globally, including in Korea.
Foster, Richard I.,Park, June Kyung,Lee, Keunyoung,Seo, Bum-Kyoung Korean Radioactive Waste Society 2021 방사성폐기물학회지 Vol.19 No.3
The challenges facing companies and institutions surrounding civil nuclear decommissioning are diverse and many, none more so than those faced in the United Kingdom. The UK's Generation I nuclear power plants and early research facilities have left a 'Nuclear Legacy' which is in urgent need of management and clean-up. Sellafield is quite possibly the most ill-famed nuclear site in the UK. This complex and challenging site houses much of what is left from the early days of nuclear research in the UK, including early nuclear reactors (Windscale Piles, Calder Hall, and the Windscale Advanced Gas Cooled Reactor) and the UK's early nuclear weapons programme. Such a legacy now requires careful management and planning to safely deal with it. This task falls on the shoulders of the Nuclear Decommissioning Authority (NDA). Through a mix of prompt and delayed decommissioning strategies, key developments in R&D, and the implementation of site licenced companies to enact decommissioning activities, the NDA aims to safety, and in a timely manner, deal with the UK's nuclear legacy. Such approaches have the potential to influence and shape other such approaches to nuclear decommissioning activities globally, including in Korea.
SOHIO process legacy waste treatment: Uranium recovery using ion exchange
Richard I. Foster,James T.M. Amphlett,Kwang-Wook Kim,Timothy Kerry,Keun-Young Lee,Clint A. Sharrad 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.81 No.-
The feasibility of employing ion-exchange resins for the selective removal of uranium from a complexwaste effluent has been investigated. The source of the effluent is a treatment process to reduce thevolume of a spent uranium containing catalyst prior to its immobilisation and disposal in South Korea. Commercial anion exchange and chelation resins have been screened, along with an in-housesynthesized polyamine functionalized resin. The Langmuir isotherm model produced the bestfit for UO22+ binding to all resins, with Purolite MTS957, a mixed sulfonic/phosphonic acid functionalised resin,showing the highest equilibrium adsorption capacity for UO22+, 96.15 mg g 1. The Modified Dose-Response Model was found to adequately represent breakthrough across allflow rates used and for allresins tested under dynamic testing conditions. The maximum uranium loading capacities underdynamic conditions for simulant and real wastes were established as 131.52 mg g 1 and 68.62 mg g 1,respectively. Purolite MTS957 effectively decontaminated the real effluent to uranium levels below theKorean release limit of 1 mg L 1. Over 99.9% uranium was successfully eluted from the resin bed in under20 BV with a mixed sodium carbonate/sulfate eluent.