2 Small modular reactor system equipped with naturally circulating second cooling complex

The present invention relates to an integral reactor system with a naturally circulated secondary cooling system. The present invention is composed of a reactor vessel (11), a core support barrel (19), a riser (13), a steam generator (17), a pressurizer (not shown) and a residual heat removal system...

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Bibliographic Details
Main Authors KIM MUN SOO, LIM HEOK SOON
Format Patent
LanguageEnglish
Korean
Published 17.01.2020
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Summary:The present invention relates to an integral reactor system with a naturally circulated secondary cooling system. The present invention is composed of a reactor vessel (11), a core support barrel (19), a riser (13), a steam generator (17), a pressurizer (not shown) and a residual heat removal system (20). The residual heat removal system (20) is composed of: a heat sink water tank (271); an extraction pipe connecting a pipe line, through which a secondary coolant flows, and the heat sink water tank (271) to extract the secondary coolant and transport the same to the heat sink water tank (271); a return pipe returning the secondary coolant which passed the inside of the heat sink water tank (271) to the pipe line through which the secondary coolant flows; a heat exchange pipe (25) embedded in the heat sink water tank (271) and having one end connected to the extraction pipe and the other end connected to the return pipe such that the second coolant flows from the extraction pipe to the return pipe; and a convection tube (272), as a member penetrating the inside of the heat sink water tank (271), removing residual heat inside the heat sink water tank (271) by distributing air inside the heat sink water tank (271) to transfer the heat inside the heat sink water tank (271) to the air, wherein the convection tube (272), in which the chimney effect can be used, is installed in the heat sink water tank (271). Accordingly, the integral reactor system of the present invention has greatly improved operation stability of an integral reactor by allowing great cooling efficiency and rapid residual heat removal compared to conventional passive residual heat removal systems. 본 발명은 자연 순환되는 2차 냉각계통이 구비된 일체형 원자로 시스템에 관한 것으로서, 원자로 용기(11)와, 노심지지 배럴(19)과, 라이저(13)와, 증기발생기(17)와, 가압기(미도시) 및, 잔열제거계통(20)으로 구성되되, 잔열제거계통(20)은 히트싱크 수조(271)와, 상기 2차 냉각재가 흐르는 관로와 히트싱크 수조(271)를 연결시켜 2차 냉각재를 추출하여 히트싱크 수조(271)로 이송하는 추출 관 및 히트싱크 수조(271) 내부를 통과한 2차 냉각재를 2차 냉각재가 흐르는 관로로 복귀시키는 복귀 관과, 히트싱크 수조(271)에 내장되는 관으로서 일단은 추출 관에 연결되고 타단은 복귀 관에 연결되어 추출 관으로부터 복귀 관으로 2차 냉각재가 흐르는 열 교환 관(25) 및, 히트싱크 수조(271) 내부를 관통하는 부재로서 내부에 공기를 유통시켜 히트싱크 수조(271) 내부의 열을 공기로 전달시킴으로써 히트싱크 수조(271) 내부의 잔열을 제거시키는 대류 튜브(272)로 이루어짐으로써, 굴뚝 효과가 이용될 수 있는 대류 튜브(272)가 히트싱크 수조(271)에 설치됨으로써, 종래의 피동잔열제거계통에 비해 월등하게 큰 냉각 효율과 신속한 잔열제거가 가능하여 일체형 원자로의 운전 안정성이 크게 향상되는 일체형 원자로 시스템을 제공하고자 한다.
Bibliography:Application Number: KR20180133667