Abstract: A method for decommissioning a heavy water reactor facility includes: removing the plurality of guide tubes from a plurality of through-holes; installing a plurality of shielding stoppers in the plurality of through-holes; removing the shielding stopper installed in one through-hole of the plurality of through-holes, and inserting a cutting device into a lower portion of the reactivity mechanism deck through the one through-hole to cut a connection portion between the reactivity mechanism deck and the calandria vault by using the cutting device; and separating the reactivity mechanism deck from the calandria vault.

Abstract: The present invention relates to an apparatus for removing snow through liquefaction, and the objective of the present invention is to provide an apparatus for removing snow through liquefaction that can melt snow suctioned by a snow suction means into water, thereby enhancing energy efficiency. The apparatus comprises: a snow suction means that includes a stirring part that forcibly crushes and stirs external snow and a suction part that forcibly suctions the snow that is stirred in the stirring part; a water spray means that sprays water into the suction part to melt the snow suctioned by the snow suction means; a storage part that stores the water into which the snow is melted by the water spray means; and a heating means that is located below the storage part and applies heat to the water stored in the storage part, wherein the heated water in the storage part is pumped and supplied to the water spray means.

Abstract: A snow removal apparatus having improved dissolution efficiency in which dissolution efficiency is improved by rapidly processing dry snow and wet snow using a suction unit and plurality dissolution units. The snow removal apparatus having improved dissolution efficiency includes a snow suction unit provided with a stirring portion configured to forcibly crush and stir external snow and a suction portion configured to forcibly suction the snow stirred by the stirring portion, a storage tank, a hopper, a first dissolution unit, a second dissolution unit, and a third dissolution unit.

Abstract: The present invention relates to an apparatus for removing snow through liquefaction, and the objective of the present invention is to provide an apparatus for removing snow through liquefaction that can melt snow suctioned by a snow suction means into water, thereby enhancing energy efficiency. The apparatus comprises: a snow suction means that includes a stirring part that forcibly crushes and stirs external snow and a suction part that forcibly suctions the snow that is stirred in the stirring part; a water spray means that sprays water into the suction part to melt the snow suctioned by the snow suction means; a storage part that stores the water into which the snow is melted by the water spray means; and a heating means that is located below the storage part and applies heat to the water stored in the storage part, wherein the heated water in the storage part is pumped and supplied to the water spray means.