Uncontrolled Ammonia Release Fault Tree: Industry Feedback

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As part of a comprehensive ammonia risk analysis, Technical Safety BC has drafted a fault tree to visualize different failure scenarios that can result in the uncontrolled release of ammonia from ammonia refrigeration systems. This fault tree is foundational for characterizing each ammonia incident in BC and helps us identify the most prominent scenarios to be addressed through our risk treatment plan. We would like industry's help to clarify and add any missing scenarios to this fault tree. The risk treatment planning process is scheduled for early 2026 and will reconsider existing actions and develop new risk treatment actions with industry experts to tackle the risk of ammonia release in BC.

We invite you to share your expertise by taking the survey (deadline: October 2, 2025, 5 pm) to help improve this fault tree.

If you are interested in attending a workshop on October 6, 2025 or October 8, 2025 to discuss any missing scenarios, please save these dates. Workshop registration can be completed at the end of the survey.

As part of a comprehensive ammonia risk analysis, Technical Safety BC has drafted a fault tree to visualize different failure scenarios that can result in the uncontrolled release of ammonia from ammonia refrigeration systems. This fault tree is foundational for characterizing each ammonia incident in BC and helps us identify the most prominent scenarios to be addressed through our risk treatment plan. We would like industry's help to clarify and add any missing scenarios to this fault tree. The risk treatment planning process is scheduled for early 2026 and will reconsider existing actions and develop new risk treatment actions with industry experts to tackle the risk of ammonia release in BC.

We invite you to share your expertise by taking the survey (deadline: October 2, 2025, 5 pm) to help improve this fault tree.

If you are interested in attending a workshop on October 6, 2025 or October 8, 2025 to discuss any missing scenarios, please save these dates. Workshop registration can be completed at the end of the survey.

  • Survey: Uncontrolled Ammonia Release Fault Tree

    Please complete this survey by October 2, 2025 (5 pm).

    In this survey, we will ask you to review the ammonia release fault tree and see if:

    1. Any failure scenarios are missing; and
    2. Any of the existing scenarios are unclear/ambiguous.

    If you are not familiar with fault trees, please watch the short video tutorial that describes how to read a fault tree.

    NOTE: We encourage you to complete this survey in one sitting, but if it's not possible, please keep this page open on your browser (it will not time out) until you are ready to submit it. Do not click on the survey link again as that will remove your current responses.

    View the ammonia release fault tree

    Watch the video tutorial on how to read fault trees

    Take Survey
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Page last updated: 17 Sep 2025, 04:39 PM