JET FUEL DISCHARGE STRUCTURE AND CAST STORAGE BUILDING USING THE SAME

• Main Author: KAWAHARA YOSHIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 07.05.2015
• Subjects: DECONTAMINATION ARRANGEMENTS THEREFOR; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

PROBLEM TO BE SOLVED: To shorten time for burning a jet fuel entering a cask storage building owing to collision of an aircraft against the cask storage building.SOLUTION: A jet fuel discharge mechanism 30a is provided in a cask storage building 11 that stores casks 10, and that includes a first air supply port 22a and a second air supply port 22b for introducing ambient air AR into a space SP in which the casks 10 are stored, and a first exhaust port 26a and a second exhaust port 26b for discharging the ambient air AR from the space SP. The jet fuel discharge mechanism 30a includes: liquid collection sections 32g, 32e, 32f provided on at least either a floor 12 in part of areas of which the casks 10 are mounted or a radiation shield 27 provided upward U of the floor 12, and collecting a jet fuel entering an interior of the cask storage building 11; a tank 50 accumulating the collected jet fuel; and a pipe 36 connecting the liquid collection sections 32g, 32e, and 32f to the tank 50. 【課題】キャスク貯蔵建屋への航空機衝突によってキャスク貯蔵建屋内へ浸入したジェット燃料が燃焼する時間を短縮すること。【解決手段】ジェット燃料排出構造３０ａは、キャスク１０を貯蔵し、かつキャスク１０が貯蔵される空間ＳＰに外気ＡＲを導入する第１給気口２２ａ及び第２給気口２２ｂ並びに空間ＳＰから外気ＡＲを排出する第１排気口２６ａ及び第２排気口２６ｂを有するキャスク貯蔵建屋１１に設けられる構造であり、一部の領域にキャスクが載置される床１２及び床１２の上方Ｕに設けられた放射線遮蔽体２７の少なくとも一方に設けられて、キャスク貯蔵建屋１１の内部に浸入したジェット燃料を集める集液部３２ｇ、３２ｅ及び３２ｆと、集められたジェット燃料を溜めるタンク５０と、集液部３２ｇ、３２ｅ及び３２ｆとタンク５０とを接続する配管３６と、を含む。【選択図】図４