This series contains correspondence files used for material classified as 'Restricted' and 'Confidential'.
Topics covered include European Nuclear Industry, Environmental Surveys, Fluorine Production in Australia, Scientific Exchanges, Legal Commissions, Carbon Fibre Technology, Desalination Systems, Power and Energy, Uranium and Reactor Surveys. The system of arrangement and control is by single number with 'LHC' [Lucas Heights Confidential], 'LHR' [Lucas Heights Restricted] and 'LHCC' [Lucas Heights Commercial in Confidence] prefixes.