The present invention is related to a Thorium Molten Salt Reactor (Th-MSR) using 100% non-radioactive Thorium fuel, composed of LiF+BeF.sub.2+ThF.sub.4 without containing any U-235. The Th-MSR is consisted of a reactor chamber, a fuel injector, a fuel reservoir, an in-line chemical extraction unit, a heat exchanger, a few KW electricity turbine generator and a condenser. A few KW nuclear power generation system is adopting the controlling devices comprised of a neutron flux sensor, a fuel injecting sensor, a thermal sensor and a power output sensor. A neutron generator with a high neutron flux of 10.sup.13 n/s is used. The high flux fast neutrons are slowing down into the thermal neutrons by the graphite moderators in the reactor for initiating the fission.

A rod transfer assembly has an outer rotating plug. A pick-up arm assembly extends from the outer rotating plug and includes a pivoting arm. An inner rotating plug is disposed off-center from and within the outer rotating plug and is rotatable independent of a rotation of the outer rotating plug. An access port rotating plug is disposed off-center from and within the inner rotating plug and is rotatable independent of rotation of the outer and inner rotating plugs. A pull arm extends from the access port rotating plug.

A power generation system comprises: a muon-catalyzed nuclear fusion device configured to undergo muon-catalyzed nuclear fusion; and a nuclear-reactor power generation device configured such that a nuclear fuel therein is irradiated with neutrons generated as a result of muon-catalyzed nuclear fusion in the muon-catalyzed nuclear fusion device, thereby to carry out power generation, wherein a pressurized-water nuclear reaction vessel in the nuclear-reactor power generation device is arranged so as to surround a nuclear fusion reactor core in which muon-catalyzed nuclear fusion occurs via a structural partition separating the muon-catalyzed nuclear fusion device from the nuclear-reactor power generation device.

A power generation system comprises: a muon-catalyzed nuclear fusion device configured to undergo muon-catalyzed nuclear fusion; and a nuclear-reactor power generation device configured such that a nuclear fuel therein is irradiated with neutrons generated as a result of muon-catalyzed nuclear fusion in the muon-catalyzed nuclear fusion device, thereby to carry out power generation, wherein a pressurized-water nuclear reaction vessel in the nuclear-reactor power generation device is arranged so as to surround a nuclear fusion reactor core in which muon-catalyzed nuclear fusion occurs via a structural partition separating the muon-catalyzed nuclear fusion device from the nuclear-reactor power generation device.