| 摘要 |
A containment vessel (3) has an inner shell (17) covering a reactor pressure vessel (2), and also has an outer shell (18) forming an outer well (19) which is a gas-tight space covering the horizontal outer periphery of the inner shell (17). The inner shell (17) has a first cylindrical side wall (4a) which surrounds the horizontal periphery of the reactor pressure vessel (2), a containment vessel head (6) which covers the upper part of the reactor pressure vessel (2), and a first top slab (5a) which connects in a gas-tight manner the periphery of the containment vessel head (6) and the upper end of the first cylindrical side wall (4a). The outer shell (18) has a second cylindrical side wall (4b) which surrounds the outer periphery of the first cylindrical side wall (4a), and also has a second to slab (5b) which connects in a gas-tight manner the vicinity of the upper end of the second cylindrical side wall (4b) and the first cylindrical side wall (4a). In an accident of the nuclear reactor, without relying on an external power source, the release of particulate radioactive materials to the environment can be suppressed and the pressure in the containment vessel can be limited to a design pressure or below. |
