No this was the variable that was keeping track of the time that the reactor was on with no flow. This was to turn on the reactor if the flow is recovered. Per the SRSs we fault if the reactors are on with no flow.
This line of code is not referencing a field in a structure. I do not see it declared anywhere. I've been unable to build this branch (I think because there is no fwcommon branch) so somebody may have fixed this in develop.