StayLive actively promotes the sharing of information as soon as possible after near miss or actual safety incidents to inform members about hazards arising out of their operations.
Hidden vulnerability in governor
Date of Incident: 18 February 2021
Description:
A historical upgrade to the hydraulic governor system at a hydro power station introduced a vulnerability whereby the wicket gates could not close in the event of a low oil level trip. This hidden system vulnerability was recently discovered during testing. This highlights the importance of formal management of change processes and documenting system vulnerabilities for posterity.
Original Shared Learning
