Patent Number: 
Section: claims

1. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear plant, comprising: carrying a radiation shield for shielding radiations from said reactor pressure vessel into said reactor building;  positioning said radiation shield onto a reactor shield wall shielding said reactor pressure vessel inside said reactor building;  abutting said reactor pressure vessel and said radiation shield by raising said reactor pressure vessel; and  carrying said reactor pressure vessel together with said radiation shield out of said reactor building by raising said reactor pressure vessel. 2. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear plant, comprising: carrying a radiation shield for shielding radiation from said reactor pressure vessel into said reactor building;  positioning said radiation shield onto a reactor shield wall shielding said reactor pressure vessel inside said reactor building;  attaching a hanger to said reactor pressure vessel;  abutting a part of the upper end portion of said reactor pressure vessel and a part of the upper portion of said radiation shield by raising said reactor pressure vessel; and  carrying said reactor pressure vessel together with said radiation shield out of said reactor building by raising said reactor pressure vessel. 3. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear plant according to  claim 2 , wherein said hanger is attached to a head of said reactor pressure vessel. claim 2 4. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear plant, comprising: carrying a radiation shield for shielding radiation from said reactor pressure vessel into said reactor building;  positioning said radiation shield onto a reactor shield wall shielding said reactor pressure vessel inside said reactor building;  abutting said reactor pressure vessel and said radiation shield by raising said reactor pressure vessel; and  carrying said reactor pressure vessel together with said radiation shield out of said reactor building by raising said reactor pressure vessel. 5. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear power plant, comprising: carrying a radiation shield for shielding radiation from said reactor pressure vessel into said reactor building;  positioning said radiation shield onto a reactor shield wall shielding said reactor pressure vessel inside said reactor building;  abutting a head of said reactor pressure vessel and said radiation shield by raising said reactor pressure vessel; and  carrying said reactor pressure vessel together with said radiation shield out of said reactor building by raising said reactor pressure vessel. 6. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear power plant, comprising: carrying a radiation shield for shielding radiation from said reactor pressure vessel into said reactor building;  positioning said radiation shield onto a reactor shield wall shielding said reactor pressure vessel inside said reactor building;  abutting a part of the upper end portion of said reactor pressure vessel and a part of the upper portion of said radiation shield by raising said reactor pressure vessel; and  carrying said reactor pressure vessel together with said radiation shield out of said reactor building by raising said reactor pressure vessel. 7. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear power plant, comprising: carrying a radiation shield for shielding radiation for said reactor pressure vessel into said reactor building;  positioning said radiation shield onto a reactor shield wall shielding said reactor pressure vessel inside said reactor building;  raising said reactor pressure vessel into said radiation shield until said reactor pressure vessel comes into contact with means through which said reactor pressure vessel bears the weight of said radiation shield; and  carrying said reactor pressure vessel together with said radiation shield out of said reactor building by raising said reactor pressure vessel. 8. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear plant according to  claim 7 , wherein said means are stoppers mounted on an upper lid of said radiation shield. claim 7 9. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear plant according to  claim 7 , wherein said means are stopper beams fixed to an upper portion of said radiation shield. claim 7 10. A method of removing a radioactivated reactor pressure vessel from a reactor building of a nuclear plant according to  claim 9 , wherein said stopper beams contact an upper flange of said reactor pressure vessel. claim 9