Korea Hydro Nuclear Power Co., Ltd.

Hang-Rae Cho

Cheon-Woo Kim

Young Hwan Hwang

Seok-Ju Hwang

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.

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Daejeon, South Korea

Hang-Rae Cho