Patent Number: 052572960
Section: claims

1. In nuclear a steam generator, including: 2. A combination according to claim 1, wherein said injector nozzle comprises: 3. A combination according to claim 1, wherein said lower access eductor comprises: 4. A combination according to claim 3, wherein said lower access eductor comprises: 5. In a nuclear steam generator, including: 6. In a nuclear steam generator, including: i. a plurality of generator tube support plates, each said generator tube support plate having a plurality of openings;  ii. a plurality of generator tubes forming a tube bundle, each said generator tube passing through aligned said openings in said support plates;  iii. an outer casing surrounding said tube bundle and generator tube support plates, said outer casing having an upper end and a lower end, upper access openings between said upper and lower ends, and lower access openings near said lower ends; and  iv. a tube bundle shroud, having an upper end and a lower end and a plurality of passageways in said lower end, surrounding said tube bundle between said outer casing and said tube bundle, said tube bundle shroud forming an annulus between said outer casing and said shroud;  a. filling said steam generator with liquid to a level such that a desired number of said tube support plates are submerged in said liquid;  b. establishing a recirculation flow of said liquid, wherein said liquid is discharged from said steam generator, and said liquid is recirculated back into said steam generator, with a first portion of said liquid being directed through at least one said lower access opening into said tube bundle through one said passageway, and a second portion of said liquid being directed through at least one said upper access opening into said annulus; and