Abstract: Disclosed is a liquid filling apparatus for high-temperature and high-pressure vessel. The apparatus comprises a high-temperature and high-pressure vessel, a closed liquid storage tank disposed at a level higher than that at which liquid is filled into the high-temperature and high-pressure vessel, a liquid-filling flow passage for supplying liquid from the closed liquid storage tank into the high-temperature and high-pressure vessel, a pressure-feed flow passage for supplying pressure from the high-temperature and high-pressure vessel to the closed liquid storage tank, valves equipped on the liquid-filling flow passage and the pressure-feed flow passage respectively, and a liquid-filling liquid source adapted to communicate with the interior of the closed liquid storage tank via a valve, whereby the environmental surroundings of the closed liquid storage tank are lower in temperature than the interior of the high-temperature and high-pressure vessel.

Abstract: A nuclear reactor facility including a primary containment vessel, a reactor pressure vessel installed in the primary containment vessel and accommodating a reactor core in a lower part thereof, and a vertical cylindrical wall disposed in a lower part of the primary containment vessel around and spaced from the reactor pressure vessel so as to delimit an annular space therebetween. The vertical cylindrical wall has an upper end disposed at a position higher than an upper end of the reactor core and a diaphragm extends substantially horizontally between the upper end of the vertical cylindrical wall and an inner wall of the primary containment vessel for cooperating with the vertical cylindrical wall to separate a space in the primary containment vessel around the reactor pressure vessel into a pressure suppression chamber and a drywell which includes annular space.

Abstract: A container-outer-periphery pool in which water is stored is provided between a primary containment vessel and a reactor building, and outside of a pressure suppression pool. Consequently, the natural heat transfer capabilities of reactor facilities is enhanced, and the inherent safety of the reactor facilities is improved.

Abstract: The invention provides an improved means for preventing deformation and slipping-off of a coil spring-type over-cover clutch by incorporating in the clutch a novel cylindrical spring cap.In recent years, engine power and speed have increased with an increase in speed in transportation. Consequently, in a coil spring-type over-cover clutch, possibility of troubles developing -- such as slipping-off and deformation of said coil spring -- has become greater due to an increase in centrifugal force.It is an object of this invention to solve the abovementioned troubles, and the invention relates to the provision of means of preventing slipping-off and deformation.The invention will now be described in detail, and with reference to the accompanying drawing, in whichFIG. 1 is a vertical sectional view of a clutch embodying this invention;FIG. 2 is a partially enlarged view of FIG. 1; andFIG. 3 is a sectional view of a conventional clutch.