What's New in the 2022 Update

Changes to Web Site Content

Starting from the 2016 Update, the schedule for performing component and system study updates is every other year, while the loss of offsite power and initiating event updates are still done each year. This 2022 Updates include the "full" studies for loss of offsite power, initiating event, component, and system studies using data through calendar year 2022.

The parameters used in the SPAR models have been updated using data through calendar year 2020. The 2020 SPAR parameter update includes initiating event frequencies, component unreliability, component unavailability, common cause failure alpha factors, and loss of offsite power nonrecovery probabilities. The next update is planned to use data through calendar year 2025 and will be conducted around 2026.

Historical Update Summaries

Page Last Reviewed/Updated Friday, May 24, 2024