AN OVERVIEW OF THE DRAFT CSA N288.8 – ESTABLISHING AND IMPLEMENTING ACTION LEVELS TO CONTROL RELEASES TO THE ENVIRONMENT FROM NUCLEAR FACILITIES*
3rd Canadian Nuclear Waste Management Decommissioning and Environmental Restoration - 2016 Sept. 11-14


Presented at:
3rd Canadian Nuclear Waste Management Decommissioning and Environmental Restoration
2016 Sept. 11-14
Location:
Ottawa, Canada
Session Title:
Session W1: Site Remediation Experience

Authors:
J. DeWilde (Golder Associates Ltd.)
T. Mahilrajan (International Safety Research Inc.)
  

Abstract

An action level is defined as a specific parameter that when reached, may indicate a loss of control of part of a licensee’s radiation protection program or environmental protection program, and will require specific action to be taken. In 2012, through the dissemination of a Discussion Paper and subsequent workshops, the Canadian Nuclear Safety Commission (CNSC) highlighted the inconsistent development and implementation of action levels across all licensed nuclear facilities. In response, the CNSC and industry counterparts agreed to develop a standard through the consensus-based approach facilitated by the Canadian Standards Association (CSA). This standard, DRAFT CSA N288.8, is currently undergoing public review.

 

This paper outlines the process developed in the DRAFT CSA N288.8, which allows for a consistent and uniform development of action levels as they relate to releases to the environment. The paper reviews the objectives of an action level and the various components related to the development and implementation of an action level.  The development aspects include: the selection of effluent monitoring locations and contaminants/radionuclides of potential concern; the development of action levels for proposed facilities (the prospective process); and the development of action levels for facilities with existing emissions data (the retrospective approach).  In general action levels developed through this process are based on review of historical normal emissions and the calculation of an action level above these emissions but below risk-based or regulatory limits and below emissions related to loss of control.  By balancing these normal operations data, the risk/regulatory values and loss of control values, the action levels are intended to detect loss of control within an environmental protection program and ensure timely action to mitigate emissions and thereby protect the environment.

 

The intended audience would be those responsible for developing and implementing action levels as well as those reviewing these items.

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