1. JIIRP Workshop Feb 26, 2007 Janos Toth, Ph.D., P. Eng. British Columbia Transmission Corporation

2. 2 Topics 1. Acceptable Risk Tolerance Level

3. 3 Topics 1. Acceptable Risk Tolerance Level 2. Recovery and Restoration Times

4. 4 Acceptable Risk Tolerance Level To prepare a risk response plan we need to know the Acceptable Risk Tolerance Level from Natural Events (Seismic, Ice Storm, Wind Storm etc.) for infrastructure elements (utility, road system etc.) by the company and the public (social acceptance of loss levels)

5. 5 Acceptable Risk Tolerance Level From CAN/CSA-Q850-97 (Reaffirmed 2002) Risk Management: Guideline for Decision-Makers

6. 6 Acceptable Risk Tolerance Level Company and Public Risk Tolerance could be very different !

7. 7 Acceptable Risk Tolerance Level Company and Public Risk Tolerance could be very different ! Recent wind an snow storms in BC created extended electrical outages for customers.

8. 8 Recovery and Restoration Times Acceptable recovery and restoration times for infrastructure components (hours, weeks or months?) Company and public requirements could be quite different. Public usually requires quick response Companies have limited resources to respond.

9. 9 Answers Required When we can get reasonable answers for these questions we can plan for an event (potential disaster) and mitigate its impact within our resource and political constrains (cost of service delivered). Currently there is no coordinated risk tolerance level among utilities. NBCC 2005 has requirements for new construction, mainly buildings, but many existing system elements do not meet these requirements and some items are outside the scope of the code, for example transmission lines and substations.

10. 10 Answers Required What can we do now? Upgrade to some technically reasonable risk tolerance level, usually defined within companies. Is this acceptable by the public?