| 摘要 |
PURPOSE:To suppress a thermal stress, applied on a connecting part between the supporting structure and a cylinder upon thermal transition, in low and reduce damage due to creep of discontinuous section of the structure by a method wherein the connecting position between the supporting structure and the outer cylinder is positioned at the lower part of the outer cylinder enveloping low-temperature primary cooling agent after exchanging heat. CONSTITUTION:The primary cooling agent, heated by a reactor and becoming high temperature as well as radio active, flows into the outer cylinder 1 through a primary inlet nozzle 2, ascends through annular flow path formed by the outer cylinder 1 and an outer shroud 21, flows into the outer shroud 21 through the inlet window 9 of the outer shroud 21 and flows down under effecting heat exchange between secondary cooling agent ascending through heat transfer tubes 11, thereafter, flows out of the heat exchanger from the primary outlet nozzle 3 of the outer cylinder 1 through an outlet window 10. The cooling agent, flowed out of the outlet window 10 of the outer shroud 21 has a low temperature sufficiently and it is lower than the creep area temperature of the material of the structure, therefore, the heat stress applied on the connecting section may be reduced and the damage due to creep may be reduced sufficiently in case the connecting section of the supporting structure 15 is set at the lower part of the outer cylinder 1, which is lower than a partitioning plate 16. |
