Nuclear Plant - Active Component (Valves)
This is for all you System guys. What are the classifications for a valve to be considered an Active Component? Also, if the valve is classified as an Active Component does it automatically mean that the valve is a Safety Related Valve? I have several valves in my system (Check, Control, Isolation) that are Safety Related Valves but are not considered Active Components... Why?
Any NRC, IAEA, or the likes reference material is helpful.
Re: Nuclear Plant - Active Component (Valves)
I will see if I can find a discussion reference and edit this post. In the meantime you may want to search for :active component: or :active safety function: on the NRC website
10 CFR 50 Appendix A Criterion 43 specifies valves as "active" components. The safety function for a valve requires that the system have a safety function. Any activation, isolation or repositioning of the valve during a mode change of the system will result in the valve having an active safety function. If the valve doesn't reposition it still has a passive safety function if the system is safety related.
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