| 摘要 |
The steam generator ( 1 ) comprises a first normal feed water device ( 8 ) and a second emergency feed water device ( 16 ) of the steam generator, comprising, respectively, a first toroidal header ( 10 ) and a second toroidal header ( 17 ) arranged coaxially with respect to the outer jacket ( 2 b) of the steam generator. The second toroidal header ( 17 ) of the second emergency feed water device ( 16 ) placed inside the upper cylindrical part ( 2 b) of the outer jacket comprises, fastened to each of a set of openings penetrating an upper part of its toroidal wall, a water injection tube ( 22 ) having an open lower end part fastened to the opening of the toroidal wall, a straight part inclined with respect to the vertical axial direction in the direction of a central part of the steam generator and an open upper end at the end of the straight part of the tube ( 22 ) for injecting emergency water inside the steam generator.
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