This guide discusses the hazardous phenomena associated with external man-induced events, such as aircraft crashes, explosions, release of hazardous fluids using screening distances and probabilities. Their potential effects on the nuclear power plant and methods used to develop adequate design bases for the plant to prevent such effects are also included.

This guide advises on the protection of nuclear power plants against the effects of external man-induced events which originate outside the site and which have been identified and selected as design basis external man-induced events (DBEMIEs) according to Safety Guide No. 50-SG-S5, to which this guide is complementary.

Recommends actions, conditions and procedures in relation to external human induced events and provides guidance for fulfilling the requirements of Safety Standards Series No. NS-R-3, Site Evaluation for Nuclear Installations, when conducting a site evaluation for a nuclear power plant.

The present report is a revision of Safety Series No. 75-INSAG-3 (1988), updating the statements made on the objectives and principles of safe design and operation for electricity generating nuclear power plants. It includes the improvements made in the safety of operating nuclear power plants and identifies the principles underlying the best current safety policies to be applied in future plants. It presents INSAG's understanding of the principles underlying the best current safety policies and practices of the nuclear power industry.

This report provides guidance on assessing habitability in existing installations and at the design stage for new plants and suggests actions to improve habitability in the event of an accident.