Canadian Nuclear Society

Société Nucléaire Canadienne

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

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

The Toronto Branch of the Canadian Nuclear Society and OPG Probabilistic Risk

Assessment Department Communications Team Announce a Public Seminar

Speaker: Mr. Hymie Shapiro, Principal Engineer, PSA,

Atomic Energy Canada, Ltd. (AECL)

Topic: Atomic Energy of Canada Limited's Approach to Probabilistic Risk Assessment

Date and Time: 11:45 AM - 1 PM, Wednesday, December 6, 2000

Location: Main Auditorium, OPG Head office, 700 University Ave., Toronto

Visitors please enter the OPG front doors outside Queens Park subway station and take the stairs or elevator to the Mezzanine Level and follow the signs.

Coffee and donuts will be provided.


The talk will describe AECL's approach in applying Probabilistic Safety Assessment (PSA) on Canadian CANDU 3, CANDU 6 and CANDU 9 nuclear reactor designs. The objectives of the PSA for the all CANDU programs will be presented. The PSA scope, methods, and tools will be described and examples for current safety analysis given. For example, AECL has applied the large event tree / small fault tree approach for the CANDU 3 and CANDU 9 design. Whereas the small event tree / large fault tree has been applied for the CANDU 6. The benefits of applying both approaches will be weighed and discussed. As well, AECL's methodology for addressing internal and external events and some of their innovative engineering insights on the topic will be presented.

Speaker's Biography

Mr. H. Shapiro received his Bachelor of Engineering degree in Chemical Engineering from McGill University in 1973. In 1977 he earned his M.A.Sc. in Chemical Engineering from the University of Waterloo. He has over 25 years experience at AECL. The first 3 years were spent in the Process Design Branch, designing heavy water management systems for Bruce B and CANDU 6 power plants. Subsequently he spent 2 years in procuring heat exchangers and pressure vessels for Bruce B and Darlington plants.

For the past 20 years he has been involved in the probabilistic safety assessment discipline. He led the PSA program for the CANDU 3 conceptual design. In 1990 to 1997, he led the Korean Wolsong 2,3, and 4 reactor PSA and Abnormal Operating Manuals effort. Presently he leads the Chinese Qinshan CANDU PSA and Emergency Operating Procedure teams.

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,