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 illfamed 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.

1. Introduction
    1.1 Nuclear Decommissioning
    1.2 Purpose of Review
2. UK’s Nuclear Legacy
    2.1 Reactors
    2.2 Sellafield
    2.3 Other Nuclear Facilities
    2.4 Clean-up of the Nuclear Legacy
3. Nuclear Decommissioning Authority
    3.1 Site Licence Companies
4. UK’s Decommissioning Approach
    4.1 NDA Strategy
    4.2 NDA Business Plan
    4.3 NDA’s Decommissioning Approach: Sellafield
    4.4 NDA’s Decommissioning Approach:Magnox Fleet
    4.5 NDA ‘Nuclear Provision’
    4.6 Waste Management Lifecycle
    4.7 Geological Disposal Facility
    4.8 UK Approach to Nuclear Site Licence Termination
5. Strategic Nuclear DecommissioningBlueprint for Korea
6. Conclusions
REFERENCES

• Richard I. Foster(Korea Atomic Energy Research Institute) Corresponding Author
• June Kyung Park(Korea Atomic Energy Research Institute)
• Keunyoung Lee(Korea Atomic Energy Research Institute)
• Bum-Kyoung Seo(Korea Atomic Energy Research Institute)