| 摘要 |
<p>A compact, unitized pressurized water reactor having a pressure vessel (3) with inner and outer walls (5, 7) which form an annular section (9) and a central chamber. Heat transfer tubes (59) are provided in the annular hollow section (9) and mounted on tube sheets (35) which seal the upper portion of the annular section (9) from the lower portion thereof. Compartments (10) are formed in the lower portion of the annular hollow section by divider walls (33) and channel members (42). A core (29) is disposed within the central chamber and coolant circulating pumps (63) are provided for circulating coolant upwardly through the core (29) and through the heat exchange tubes (59) in the annular section (9) in which secondary coolant is converted to steam and discharged through openings (65) in communication with steam drums (69). The arrangement provides for a very compact structure with minimal leakage problems, all passages except for the steam pipes being contained within the reactor vessel (3).</p> |
