The Energy Act 2004 requires the Nuclear Decommissioning Authority (NDA), a non-Departmental body, to review and publish its strategy at least every five years. This document also presents the outcome of the NDA's review of the first Strategy published in 2006. This revised Strategy sets out the NDA's strategic direction and mission. The core objective of the NDA is to ensure that the historic civil public sector nuclear legacy sites are decommissioned safely, securely, cost effectively and in ways that protect the environment. As part of this, the NDA is required to operate existing commercial activities and meet current contracts, using revenues generated to offset spend on decommissioning. Much of the original strategy therefore remains the same but the UK Government policy on nuclear energy has changed and a new reactor programme is now envisaged for England and Wales. The decommissioning programme itself has an estimated cost of £45.1 billion. The Strategy can be divided into the following groups: (1) Site restoration - which defines the approach to decommissioning redundant facilities and management of contamination; (2) Spent fuels - which is managing the diverse spent nuclear fuels; (3) Nuclear materials - consists of dealing with the inventory of uranics and plutonium, stored at some site; (4) Integrated Waste Management - concerns the management of all forms of waste arising from operating and decommissioning sites; (5) Business Organisation - looks at maximising commercial income, using assets and capabilities to reduce decommissioning costs; (6) Critical Enablers - seeks to support the NDA's overall mission. The publication is divided into five chapters focusing on these issues, with appendices. The Strategy is effective from April 2011.