The Book represents a collection of papers prepared for and presented by specialists of seven concerned countries in the fourth Advanced Research Workshop (ARW), Moscow, September 22-24, 2004, sponsored and organized within the framework of the NATO-Russia partnership.Similar to the three previous publications, which collected the materials of the NATO-Russia ARWs held in Moscow in 1995, 1997 and 2002, the fourth book of the same series also addresses a very important challenge of the present - complex decommissioning of the taken-out-of-service nuclear-powered vessels and environmental rehabilitation of the centers of basing and everyday running of different-type nuclear vessels. The fourth book especially focuses on the scientific and technical problems of management of naval spent nuclear fuel and radioactive waste.Some papers of the book address the first results of the Strategic Master-plan (Master-plan) for complex decommissioning of Russian nuclear-powered vessels developed in Russia under active participation and large financial support of the international community.The fourth book, taken together with the earlier published papers of the three previous NATO ARWs, represents the most complete collection of materials on complex decommissioning of nuclear-powered vessels including the spent nuclear fuel management-related challenge. The book is intended for scientists, engineers and technicians concerned with the decommissioning of nuclear-hazardous objects, but it may be also of interest for specialists developing standard, managerial and engineering documentation as well as for those involved into the decision-making on the problems under consideration. TOC:From the contents:Spent Fuel of Decommissioned Nuclear Submarines: Questions to be Addressed; Alain TOURNYOL DU CLOS.- Justification of Priority Lines and Objectives when Resolving the Challenges of Complex Decommissioning of Nuclear Submarines.- General Policy and Strategy for French Naval Spent Fuel Management.- Management of Spent Nuclear Fuel in Finland: Policy, Past and Present Practices, Plans for the Future.- Swedish Strategy and Experience in Spent Nuclear Fuel and Radioactive Waste Management.- Spent Fuel Management in the United Kingdom.- The DTI FSU Nuclear Legacy Programme: Spent Nuclear Fuel Management at Andreeva Bay.- Implementation of the Concept and the Program of Complex Decommissioning of Nuclear Submarines, Nuclear-Powered Surface Ships and Maintenance Vessels and Rehabilitation of Radiation-Hazardous Facilities: Main Results and Unresolved Problems.- Spent Fuel Management Policy in U.S.- Actual Problems in Implementation of the International Agreements under the G8 Global Partnership Cooperation Program at FEP Zvezda.- AMEC Program's Role in the Management of Spent Fuel from Decommissioned Nuclear Submarines.-Concept of Complex Decommissioning of Civil Nuclear Powered Surface Ships and Maintenance Vessels.- Unloading, Storage and Subsequent Management of Spent Nuclear Fuel of Liquid-Metal-Coolant Reactors: Actual Status and Problems.