AECB (Atomic Energy Control Board) personnel have reviewed in detail the main aspects related to the safe operation of the Gentilly-2 nuclear power plant during 1989. This station is operated by Hydro-Quebec under a licence issued by the AECB. This evaluation is based primarily on the contents of various reports submitted by Hydro-Quebec pursuant to the terms of the operating licence, as well as on the results of inspections, audits, and tours made by AECB personnel. In general, the station was operated safely. Hydro-Quebec must continue in the efforts required to document quality assurance, rewrite operating manuals, and analyze the consequences of a pipe break in the turbine building. Greater vigilance must be exercised by Hydro-Quebec personnel in respecting the terms of the operating licence and the submission of significant event reports to the AECB.