Patent Number: 
Section: claims

1. A reactor vessel handling method comprising the steps of reinforcing an overhead traveling crane installed above a reactor vessel in a reactor containment vessel of a pressurized water reactor containing said reactor vessel by supporting said overhead traveling crane with reinforcing members installed in said reactor containment vessel, lifting said reactor vessel from said reactor containment vessel up to an operating floor in said reactor containment vessel by using the reinforced overhead traveling crane, tilting down said reactor vessel at said operating floor, and then carrying out said reactor vessel in the state of being tilted-down through an opening provided in a side wall of said reactor containment vessel to the outside of said reactor containment vessel. 2. A reactor vessel handling method according to  claim 1 , wherein an equipment carrying-in opening in said reactor containment vessel is enlarged and utilized as said opening. claim 1 3. A reactor vessel handling method comprising the steps of reinforcing an overhead traveling crane installed above a reactor vessel in a reactor containment vessel of a pressurized water reactor containing said reactor by supporting said overhead traveling crane with reinforcing members installed in said reactor containment vessel, lifting said reactor vessel from said reactor containment vessel up to an operating floor in said reactor containment vessel by using the reinforced overhead traveling crane, tilting down said reactor vessel at said operating floor, and carrying out said reactor vessel in the state of being tilted-down through an opening provided in a side wall of said reactor containment vessel to the outside of said reactor containment vessel; and then carrying in a new reactor vessel in a state of being tilted-down to said operating floor within said reactor containment vessel through said opening, and moving said new reactor vessel in a state of being tilted-up from said operating floor to said installed position by using said reinforced overhead traveling crane. 4. A reactor vessel handling method comprising the steps of, in a state in which an overhead traveling crane installed above a reactor vessel in a reactor containment vessel of a pressurized water reactor containing said reactor vessel is reinforced by supporting the overhead traveling crane with reinforcing members installed in said reactor containment vessel, carrying in a new reactor vessel in a state of being tilted-down to said operating floor within said reactor containment vessel through an opening provided in a side wall of said reactor containment vessel, and moving said new reactor vessel in a state of being tilted-up from said operating floor to an installed position of said new reactor vessel in said reactor containment vessel by using said reinforced overhead traveling crane. 5. A reactor vessel handling method according to  claim 4 , wherein said reinforcing members for said overhead traveling crane are removed after moving said new reactor vessel to said installed position. claim 4 6. A reactor vessel handling method according to  claim 1 , wherein said reinforcing members are installed to said operating floor. claim 1 7. A reactor vessel handling method according to  claim 1 , wherein said tilting-down of the reactor vessel is carried out such that the reactor vessel is tilted along with a radiation shield surrounding said reactor vessel. claim 1 8. A reactor vessel handling method according to  claim 1 , wherein said tilting-down of the reactor vessel is carried out on a car set up on said operating floor, and said carrying-out of the reactor vessel is carried out by using said car. claim 1 9. A reactor vessel handling method according to  claim 8 , wherein said tilting-down of the reactor vessel is carried out such that the reactor vessel is tilted along a radiation shield surrounding said reactor vessel. claim 8 10. A reactor vessel handling method according to  claim 9 , wherein said tilting-down of the reactor vessel is carried out by engaging a shaft attached to said radiation shield as a center of rotation with a shaft bearing member provided on said car. claim 9 11. A reactor vessel handling method according to  claim 3 , wherein said reinforcing members are installed on said operating floor. claim 3 12. A reactor vessel handling method according to  claim 3 , wherein said tilting-down of the reactor vessel is carried out such that the reactor vessel is tilted along with a radiation shield surrounding said reactor vessel. claim 3 13. A reactor vessel handling method according to  claim 3 , wherein said tilting-down of the reactor vessel is carried out on a car set up on said operating floor, and said carrying-out of the reactor vessel is carried out by using said car. claim 3 14. A reactor vessel handling method according to  claim 13 , wherein said tilting-down of the reactor vessel is carried out such that the reactor vessel is tilted along with a radiation shield surrounding said reactor vessel. claim 13 15. A reactor vessel handling method according to  claim 14 , wherein said tilting-down of the reactor vessel is carried out by engaging a shaft attached to said radiation shield as a center of rotation with a shaft bearing member provided on said car. claim 14 16. A reactor vessel handling method according to  claim 3 , wherein said carrying-in of the new reactor vessel is carried out by laying said new reactor vessel on said car. claim 3 17. A reactor vessel handling method according to  claim 4 , wherein said reinforcing members are installed on said operating floor. claim 4 18. A reactor vessel handling method according to  claim 4 , wherein said carrying-in of the new reactor vessel is carried out by laying said new reactor vessel on a car. claim 4