Nuclear reactor containment vessel

A nuclear reactor containment vessel that stores a reactor vessel in which a reactor core is stored, the vessel comprising:

• a pedestal floor which is provided below the reactor vessel;
• a pedestal side wall which rises vertically from the pedestal floor and in which a water injection outlet from which cooling water is released is formed;
• a reactor-core molten material holding device which includes:
• a holding container that is placed on the pedestal floor and has an outer circumferential surface that faces an inner surface of the pedestal side wall across a gap and is opened upward at an inner side of the outer circumferential surface, and
• a water supply container that is provided below the holding container, wherein a water supply duct that extends from a gap between the outer circumferential surface and the inner surface of the pedestal side wall to the water supply container, and a cooling duct that extends from the water supply container along a lower surface of the holding container are formed;
• and
• a flange which is fixed to a lower end of the reactor-core molten material holding device and whose vertical-direction projected area is larger than the outer circumferential surface.

A nuclear reactor containment vessel that stores a reactor vessel in which a reactor core is stored, the vessel comprising:

• a pedestal floor which is provided below the reactor vessel;
• a pedestal side wall which rises vertically from the pedestal floor and in which a water injection outlet from which cooling water is released is formed;
• and
• a reactor-core molten material holding device which includes:
• a holding container that is placed on the pedestal floor and has an outer circumferential surface that faces an inner surface of the pedestal side wall across a gap and is opened upward at an inner side of the outer circumferential surface, and
• a water supply container that is provided below the holding container, wherein a water supply duct that extends from a gap between the outer circumferential surface and the inner surface of the pedestal side wall to the water supply container, and a cooling duct that extends from the water supply container along a lower surface of the holding container are formed, wherein
• a dent is formed either on the pedestal floor or a lower surface of the reactor-core molten material holding device, and a projection, which is fitted into the dent, is formed either on a lower surface of the reactor-core molten material holding device or on the pedestal floor.

A nuclear reactor containment vessel that stores a reactor vessel in which a reactor core is stored, the vessel comprising:

• a pedestal floor which is provided below the reactor vessel;
• a pedestal side wall which rises vertically from the pedestal floor and in which a water injection outlet from which cooling water is released is formed;
• a reactor-core molten material holding device which includes:
• a holding container that is placed on the pedestal floor and has an outer circumferential surface that faces an inner surface of the pedestal side wall across a gap and is opened upward at an inner side of the outer circumferential surface, and
• a water supply container that is provided below the holding container, wherein a water supply duct that extends from a gap between the outer circumferential surface and the inner surface of the pedestal side wall to the water supply container, and a cooling duct that extends from the water supply container along a lower surface of the holding container are formed;
• and
• a tubular supporting structure which rises from the pedestal floor along the outer circumferential surface and on which a notch is formed on an upper end thereof;
• and
• a rotation prevention projecting portion which is fixed to the reactor-core molten material holding device, and which projects from the outer circumferential surface toward the pedestal side wall to engage with the notch.