CSA N288.2:19 PDF Download

CSA N288.2:19 is the third edition of the standard that provides guidelines for calculating the radiological consequences to the public in the event of a release of airborne radioactive material for nuclear reactor accidents. It is a part of the CSA N288 series of Standards on environmental management for nuclear facilities. The standard describes acceptable methods for modeling the consequences of accidents at nuclear reactors for safety assessment and real-time emergency response. It also identifies acceptable data sources and methodologies for specific effects and recommends standardized endpoints for calculations.

The third edition of the standard has been updated to reflect current industry practices and new research and analysis methods. Some of the major changes in this edition include updated definitions for consistency with the CSA N288 series of Standards, removal of administrative provisions, additional clarification in areas identified by users, and aligning definitions for beyond design basis accidents and severe accidents with CSA N290.16-16.

It is important to note that the site selection, design, manufacture, construction, installation, commissioning, operation, and decommissioning of nuclear facilities in Canada are subject to the Nuclear Safety and Control Act and its Regulations, and the Canadian Nuclear Safety Commission may impose additional requirements beyond what is specified in this Standard.

In terms of scope, the standard covers the modeling of consequences for safety assessment and real-time emergency response. It applies to accidental releases of nuclear material to the atmosphere from nuclear reactor facilities. The standard provides guidance on modeling consequences for short-term accidental releases with a duration of a month or less and covers local atmospheric dispersion in the range of 300 m to 100 km. It includes models for the dispersion and fate of radioactive contaminants, as well as pathways for immersion, external exposure, inhalation, and absorption through the skin.

The standard does not address routine releases during normal operation, spills and liquid releases to surface or ground water, urban dispersion effects, releases coincident with fire or explosion, severe weather conditions like hurricanes and tornadoes, regional and global dispersion beyond 100 km, non-radioactive contaminants or toxicity, the ingestion pathway, economic costs, logistics of protective actions, and doses and effects on non-human biota.

In summary, CSA N288.2:19 provides guidelines for calculating the radiological consequences to the public in the event of a release of airborne radioactive material for nuclear reactor accidents. It covers methods for modeling consequences, identifies data sources and methodologies, and recommends standardized endpoints for calculations. The standard has been updated to reflect industry practices and changes in research and analysis methods. It does not address routine releases, spills and liquid releases, urban dispersion effects, releases coincident with fire or explosion, severe weather conditions, regional and global dispersion, ingestion pathway, economic costs, logistics of protective actions, and doses and effects on non-human biota.