Answer 1. The only shunt reactors I know are used on transmission lines to alter power factor. This is nothing to do with the nuclear reactor in a power plant.
Answer 2. I agree. Shunt reactors are use on transmission line and EHV to boost voltage, to generate VARs and for power factor correction.
Well, as nuclear reactors are nuclear reactors, nuclear reactors are not used inside nuclear reactors.
Current nuclear reactors rely on nuclear fission as their nuclear reaction.
We use nuclear fission in nuclear reactors to tap nuclear energy.
No, at least not for power reactors
There may be Radium, Thorium, Uranium or even Plutonium which can be used in nuclear reactors.
No substitute for nuclear power reactors especially if there is no available fossil fuel.
Nuclear reactors and nuclear weapons
No, nuclear fission operates all nuclear reactors. If they are power plant reactors it is used to generate electricity.
Nuclear reactors.
In test reactors.
Radioisotopes for many uses (e.g. medical, industrial, scientific) are produced in nuclear reactors.
In some reactors it is, depends on the design.