Difference between revisions of "Human Reliability Analysis (HRA) Methods"
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| June 2025 || All Credible Dependency Combinations in Tree (ACDCT) || This new method allows JHEP development directly in the fault tree with no seed values required. With the potential to add and remove JHEPs from independent events in the tree in a similar fashion to how common cause is addressed. || [https://epri.box.com/s/b7rdvfv23ymz2m3qbqa33qh5rgvu72vh CA-MISC-036] || Y || [https://epri.box.com/s/lech9vwo4z2p5rib84exjdm4ufk0wzot CA-MISC-038] || Y || [https://epri.box.com/s/lech9vwo4z2p5rib84exjdm4ufk0wzot CA-MISC-038] | | June 2025 || All Credible Dependency Combinations in Tree (ACDCT) || This new method allows JHEP development directly in the fault tree with no seed values required. With the potential to add and remove JHEPs from independent events in the tree in a similar fashion to how common cause is addressed. || [https://epri.box.com/s/b7rdvfv23ymz2m3qbqa33qh5rgvu72vh CA-MISC-036] || Y || [https://epri.box.com/s/lech9vwo4z2p5rib84exjdm4ufk0wzot CA-MISC-038] || Y || [https://epri.box.com/s/lech9vwo4z2p5rib84exjdm4ufk0wzot CA-MISC-038] | ||
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| + | | July 2026 || EPRI Credible Dependent Failure Mechanisms (CDFM) || The CDFM method provides a risk-informed approach for HRA dependency analysis by identifying and explicitly modeling credible causes that could lead multiple Human Failure Events (HFEs) to fail in a dependent manner, rather than relying on post-processing combinations derived from PRA cutsets. HFEs are grouped based on shared functions, procedures, goals, support systems, or other credible dependency mechanisms, and these dependencies are incorporated directly into the PRA logic through Dependent Combination Events (DCEs), while a separate event accounts for residual dependencies from unknown causes. || [https://www.epri.com/research/products/000000003002032023 EPRI 3002032023] || Y || [https://epri.box.com/s/15n1ed40nh1u6759ovofq0jfrald9t5t PWROG-26009-P] || Y (findings being closed) || [https://epri.box.com/s/15n1ed40nh1u6759ovofq0jfrald9t5t PWROG-26009-P] | ||
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Latest revision as of 10:06, 9 September 2026
The following methods have been reported to EPRI as having been evaluated to determine whether they are NDMs or not. Available information on the basis for determining that a method is or is not an NDM and a summary of any completed NDM Peer Reviews are included as provided to EPRI by the party making the determination or conducting the NDM Peer Review.
| Date | Title | Description | Implementing Document | Is this a “Newly Developed Method (NDM)”? | Link to NDM Decision Justification | Has a NDM Peer Review been conducted? | Link to NDM Peer Review Public Summary |
|---|---|---|---|---|---|---|---|
| June 2025 | All Credible Dependency Combinations in Tree (ACDCT) | This new method allows JHEP development directly in the fault tree with no seed values required. With the potential to add and remove JHEPs from independent events in the tree in a similar fashion to how common cause is addressed. | CA-MISC-036 | Y | CA-MISC-038 | Y | CA-MISC-038 |
| July 2026 | EPRI Credible Dependent Failure Mechanisms (CDFM) | The CDFM method provides a risk-informed approach for HRA dependency analysis by identifying and explicitly modeling credible causes that could lead multiple Human Failure Events (HFEs) to fail in a dependent manner, rather than relying on post-processing combinations derived from PRA cutsets. HFEs are grouped based on shared functions, procedures, goals, support systems, or other credible dependency mechanisms, and these dependencies are incorporated directly into the PRA logic through Dependent Combination Events (DCEs), while a separate event accounts for residual dependencies from unknown causes. | EPRI 3002032023 | Y | PWROG-26009-P | Y (findings being closed) | PWROG-26009-P |