IAEA Member States have a growing need for casks for spent fuel storage and transportation. A variety of casks have been developed and are in use at an increasing number of sites. This has resulted in an accumulation of experience that will provide valuable information for other projects in spent fuel management. This publication provides a comprehensive review of information on the cask operation and maintenance associated with spent fuel storage. It draws upon generic knowledge from industrial experience and applications and is intended to serve as a basis for improved planning and implementation in future projects.