First published in 1989. The EFC, incorporated in Belgium, was founded in 1955 with the purpose of promoting European co-operation in the fields of research into corrosion and corrosion prevention. In 1986 the EFC Working Party on Nuclear Corrosion was reorganised with the objective of concentrating on nine topics of relevance to the nuclear power industry. The group of experts in the Working Party. The new structure of the Working Party is based on the following topics: - Pressurised Water Reactors - Boiling Water Reactors - Fuel Elements (Cladding) - Advanced Gas Reactors - High Temperature Reactors - Liquid Metal Fast Breeders - Fusion Reactors - Reprocessing - Waste Management (Disposal). The first meeting of the Working Party following the restructuring was on the occasion of EUROCORR '87 in Frankfurt. The present volume has therefore been prepared and represents Number One in the series of EFC publications.