Patent Number: 052176800
Section: claims

1. In combination, a source of liquid, a closed liquid storage tank for filling of liquid into a high-temperature and high-pressure vessel, said tank having a liquid inlet for receiving liquid from said source of liquid, a piping communicating said liquid inlet with said liquid source through which liquid from said liquid source can flow to said tank when the pressure within the closed liquid tank is relatively lower than the pressure within the liquid source, a check valve for checking the flow of said liquid from said liquid storage tank toward said liquid source by way of said piping while not checking the liquid flow from said liquid source to said closed liquid storage tank, said storage tank further including a pressure inlet through which the pressure from the high-temperature and high-pressure vessel can be introduced into said liquid storage tank via a valve, and said storage tank having a liquid supply port for supplying liquid of said tank into said high-temperature and high-pressure vessel via a valve. 2. The combination according to claim 1, further comprising a heat dissipation means for dissipating heat from said tank. 3. A liquid filling method for high-temperature and high-pressure vessel, comprising the steps of placing the interior of said high-temperature and high-pressure vessel and the interior of a closed liquid storage tank in communication with one another to make the respective pressures therein equal to each other and then filling liquid from said closed liquid storage tank into said high-temperature and high-pressure vessel by the action of gravitational force, said liquid filling method further comprising interrupting said communication between the interior of said high-temperature and high-pressure vessel and the interior of said closed liquid storage tank, dissipating the heat within said closed liquid storage tank to the outside thereof to cause a decrease in level of the pressure therewithin to a pressure lower than the pressure in a source of liquid which is continuously communicated with said closed storage tank in a manner which permits flow from said source in the direction of said tank but not in the direction from said tank to said source, and causing a liquid of said liquid source to be sucked into said closed storage tank as a result of the pressure differential between the pressures in said tank and said source to thereby cause the liquid to be stored in said tank.