Use the incident management module to see if your risk register is up-to-date. If you have an incident and it cannot be linked to an entry in your risk register, take action! Something is not right. Where is this risk coming from? Why did you miss out on it before?
A risk register is never finished. New equipment comes in, new work procedures introduced, materials change, incidents occur. Keep you risk register up-to-date. Not once a year. Continuously.