Canadian Nuclear Society

Société Nucléaire Canadienne

480 University Ave., Suite 200, Toronto, Ontario, Canada M5G 1V2

Telephone: (416) 977-7620 Fax: (416) 977-8131

Toronto Branch of the Canadian Nuclear Society and the

OPG Probabilistic Risk Assessment Department announce a public seminar

Speaker: Mr. Dominic Vecchiarelli, Senior Design Engineer - PRA, Probabilistic Risk Assessment Department (PRAD), Ontario Power Generation Inc.

Topic: OPG Nuclear Safety Goals and Economic Risk Guidelines

Date and Time: Wednesday September 6, 2000

11:45 AM - 1:00 PM

Location: Main Auditorium, Mezzanine Level

OPG Head office, 700 University Ave., Toronto

All welcome. Coffee and donuts will be provided.


In the absence of regulatory criteria against which the results of probabilistic risk assessments (PRAs) can be judged, risk-based safety goals and on-site economic risk guidelines have been proposed for use in support of PRAs at Ontario Power Generation, Nuclear (OPG,N).

The overall purpose of the safety goals is to ensure that risks to the public and OPG employees arising from hazardous substances associated with OPG's nuclear operations will be low in comparison to other risks to which the public is normally exposed and in keeping with best industry practice. Safety goals are a set of numerical values, expressed in terms of human health risk or frequency of an undesired event, which establish practical targets and limits for station design and operation. The goals are intended to represent the high standards of safety, reliability, and efficiency necessary to maintain public and regulatory acceptance of nuclear power.

The purpose of the on-site economic risk guidelines is twofold: (a) to ensure the economic risk from accidents to OPG arising from the operation of OPG generating stations is acceptable, and, by doing so, (b) to pre-empt erosion of the public safety margin.

Speaker's Biography

Dominic Vecchiarelli graduated in 1981 from the University of Toronto with a Bachelor of Science degree in Civil Engineering and later that year joined Ontario Hydro's Graduate Engineer-in-Training Program. In 1982, he became a member of the Probabilistic Risk Assessment group soon after its formation at Ontario Hydro. Since then, he has been involved in various aspects of the preparation and application of PRA, developing expertise fault tree analysis, initiating event quantification, human reliability analysis, and benefit/cost analysis.

This is the fourth of a series that is being organized jointly by the Toronto Branch of the CNS and the OPG PRAD Communications Team.

For more information, please see and follow Branches -> Toronto

Or freely contact either:

Adam McLean, University of Toronto, Teruo Takahashi, Marubeni Canada Ltd.

(416) 535-0616, (416) 368-1171 ext. 232,