SPENT NUCLEAR FUEL ASSEMBLY CONTAINER, ASSEMBLY OF SPENT NUCLEAR FUEL ASSEMBLY CONTAINERS, AND METHOD OF ASSEMBLING SPENT NUCLEAR FUEL ASSEMBLY CONTAINER

• Main Authors: HIDA YOSHIO, MURATA KOJI, UEHARA MASAKATSU, KATO HIROAKI
• Format: Patent
• Language: English; Japanese
• Published: 15.12.2016
• Subjects: DECONTAMINATION ARRANGEMENTS THEREFOR; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

PROBLEM TO BE SOLVED: To provide spent nuclear fuel assembly containers which can be stored in an integrated state without requiring a building having high shielding ability, and capable of cooling their metal casks.SOLUTION: A spent nuclear fuel assembly container comprises: a metal cask 2 storing a spent nuclear fuel assembly; a substantially hexagonal cylindrical container body 3 storing the metal cask 2; and recesses 10 which are recessed inward from outside surfaces 6a of a side cylinder 6, having a substantially hexagonal cylindrical shape, of the container body 3, and extend in a longitudinal direction thereof. Outside surfaces 6a of a plurality of container bodies 3 are joined to form a honeycomb structure, and the recesses 10 form external cooling passages 10A for circulating a cooling gas. Internal cooling passages 12 are formed between the metal cask 2 and inside surfaces 6b of the side cylinder 6 of the container body 3, connected to air supply passages 13 with air inlets at lower parts, and connected to air exhaust passages 14 with air outlets in an upper face 6d.SELECTED DRAWING: Figure 1 【課題】遮蔽能力の高い建屋を必要とすることなく互いに集積させて保管できて金属キャスクを冷却可能な使用済み核燃料集合体収納容器を提供する。【解決手段】使用済み核燃料集合体を収納した金属キャスク２と、金属キャスク２を収納した略六角筒形状の容器本体３とを備え、容器本体３の略六角筒形状の側筒部６の外側面６ａに内側に凹んで長手方向に延びる凹部１０を備え、複数の容器本体３の外側面６ａ同士を接合してハニカム構造とし、凹部１０同士で冷却用気体を流通させる外部冷却通路１０Ａを形成する。容器本体３の側筒部６の内側面６ｂと金属キャスク２の間に内部冷却通路１２を形成し、下部に給気口を有する給気路１３を連通させ、上面６ｄに排気口を有する排気路１４を連通させる。【選択図】図１