A DEVICE TO RESTRICT THE FLOW INLET THROUGH PENETRATION GUIDE TUBES INSTALLED IN A PRESSURIZER OF INTEGRAL REACTOR

摘要

An apparatus for reducing a flux quantity of a coolant which is inputted through a penetration guide tube in a pressurizer of an integral reactor is provided to improve the reliability of a pressure control function of a pressurizer by minimizing a gap between a guide tube and an internal structure of the guide tube. An apparatus for reducing a flux quantity of a coolant which is inputted through a penetration guide tube in a pressurizer of an integral reactor includes a pressurizer assembly body, a CEA extension rod guide tube(23), a CEA extension rod(17), a division circular plate(32), a spring(34), an upper cover(31), and a lower supporting bar(35). The CEA extension rod guide tube penetrates the pressurizer assembly body in an integral nuclear reactor. The CEA extension rod is installed under the CEA extension rod guide tube. The division circular plate of a ring shape has a plurality of sections. The spring pulls the division circular plates each other. The upper cover supports the division circular plate having the spring. The lower supporting bar supports a lower part of a division circular plate having the spring.