Moisture separator reheater and nuclear power plant

Abstract

An object thereof is to provide a moisture separator reheater capable of ensuring a required heat transfer area with short heat exchanger tubes to thereby allow reduction in the size thereof, and a nuclear power plant.. According to one embodiment, there is provided a moisture separator reheater comprising: a horizontal cylindrical type body drum having a steam inlet for introducing thereinside steam to be heated at its lower portion and a steam outlet for exhausting therefrom the steam at its upper portion; end plates that seal both end portions of the body drum in a longitudinal direction thereof; a moisture removal section that removes moisture in the steam distributed inside the body drum; a heat transfer tube group disposed above the moisture removal section, heating fluid for heating the steam being distributed in the heat transfer tube group; a heater header that supplies the heating fluid to the heat transfer tube group and exhausts outside the heating fluid that has been heat exchanged with the steam; and a partition plate disposed inside the body drum so as to guide the steam from the moisture removal section to the heat transfer tube group; the heat transfer tube group including a plurality of heat transfer tubes each having a forward passage part, a backward passage part, and a bent tube part, the forward and the backward passage parts extending in longitudinal direction of the body drum and the bent tube part connecting the forward and the backward passage parts, the bent tube part being provided outside the end plates.

Description

technical field [0001] Embodiments of the present invention relate to a steam-water separation reheater and a nuclear power plant that separate and heat moisture from heated steam. Background technique [0002] Moisture Separator Reheater (MSR: Moisture Separator Reheater) installed in nuclear power plants, etc. has the function of separating the moisture of the humid steam discharged from the high-pressure steam turbine, and heats the heated steam and the heating fluid after the moisture is separated. Swap these two functions while reheating the function. As the heating fluid, for example, main steam from a steam generator, extraction steam from a high-pressure turbine, or the like is used. Then, the heated steam reheated by the steam-water separation reheater is supplied to a low-pressure steam turbine and the like. [0003] In the steam-water separation reheater, when the heater head is installed outside the main vessel as a design of the pressure vessel, etc., the open...

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned conventional steam-water separation reheater, when a partition plate is provided in the main body container, a space that cannot be effectively used for the function of the steam-water separation reheater such as the above-mentioned ineffective part is generated.

Therefore, increasing the tube bundle in order to ensure the necessary heat transfer area is the cause of the increase in the size of the steam-water separation reheater.

In addition, there is a tendency to increase the size of the steam-water separation reheater along with the increase in the capacity of nuclear power plants, but it is necessary to reduce the size of the constituent equipment

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