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@ -319,6 +319,36 @@ complex but deterministic behavior.
% talk a bit about tools here like FRET. Talk about previous attempts. % talk a bit about tools here like FRET. Talk about previous attempts.
Human control of nuclear power can be divided into three different scopes:
strategic, operational, and tactical. Strategic control is the high-level and
long term decision making for the plant. This level has objectives that are
complex and economic in scale, such as managing labor needs and supply chains to
optimize sheduled maintenence and downtime. The time scale on this level of
control is long, often over months or years. The lowest level of control is the
tactical level. This is the individual control of pumps, turbines, and
chemistry of the plant. This level of control has already been somewhat
automated today in nuclear power, and is generally considered 'automatic
control' when autonomous. These controls are almost always continuous systems,
and have a direct impact on the physical state of the plant. Tactical control
objectives are things like maintaining a pressurizer level, maintaining a
certain core temperature, or adjusting reactivity with a chemical shim. The level of
control linking these two levels, then, is the operational control scope.
Operational control is the primary responsibility of human operators today.
Operational control takes the current strategic objective, and implements
tactical control objectives to drive the plant towards strategic goals. In this
way, it is the bridge between high and low level goals. A strategic goal may be
to perform refueling at a certain time, while the tactical level of the plant
currently is focused on mainting a certain core temperature. The operational
level is what issues the shutdown procedure of the plant, using several smaller
tactical goals along the way to achieve this objective. Thus, the combination of
the operational and tactical level of the plant fundamentally forms a hybrid
controller. The tactical level is the continuous evolution of the plant
according to the control input and control law, while the operational level is a
discrete state evolution which determines the tactical control law to reach
different operational states.
%%%%%%%%%%%% Building continuous controllers %%%%%%%%%%%% Building continuous controllers
% The whole point of a hybrid system is that there are continuous components % The whole point of a hybrid system is that there are continuous components