Emergency release device and emergency release structure comprising same

Abstract

The emergency release device comprises: a release assembly configured to allow molten salt to flow therein from a vessel having a reactor vessel in which the molten salt flows; and a valve assembly that causes the molten salt to flow from the reactor vessel into the release assembly in an emergency condition in which the temperature of the reactor vessel is not controllable, the valve assembly being connected to the release assembly as the molten salt flows into the release assembly.

Description

Technical Field

[0001] The present disclosure relates to an emergency release device and an emergency release structure including the emergency release device. This research is related to the research project "Development of key technologies for liquid fuel-driven nuclear heating modules" (Project ID: 1711173760, Project No.: 522310-22) supported by the Research Operation Fund of the Korea Atomic Energy Research Institute funded by the Ministry of Science and ICT in 2022. Background Art

[0002] The molten salt reactor is a fourth-generation reactor that utilizes nuclear fuel dissolved in molten fluoride or chloride, in which the salt melts at high temperature and serves as the fuel and coolant of the reactor, replacing the traditional solid nuclear fuel. In the event of a reactor accident, the temperature of the molten salt discharged from the reactor to the discharge tank is about 550°C, and the molten salt flowing into the discharge tank continuously releases residual heat to the inside of the containment. This residual heat increases the temperature inside the containment, which increases the pressure in the containment. In addition, the molten salt that may leak outside the reactor vessel due to damage to the reactor, etc. contains nuclear fuel, so the nuclear fission products generated from the molten salt may be harmful and dangerous to humans.

[0003] In order to reduce the risk of damage caused by molten salt leakage in the event of a reactor accident, attempts have been made to install molten salt reactors on ships and other transportation vehicles. Although the safety of people living on land can be ensured when a ship or other transportation vehicle is floating on the sea, if a reactor accident occurs on a ship, the crew of the ship may be in danger and the ship may sink.

[0004] Therefore, there is a need for a device that can flow the molten salt discharged from the reactor vessel in the event of a reactor accident and safely discharge the molten salt outside the ship when the flow of the molten salt is completed. Summary of the invention

[0005] Technical issues

[0006] In view of the above situation, an embodiment of the present disclosure provides an emergency release device and an emergency release structure, which can allow the molten salt of the reactor unit to flow to the release assembly through the valve assembly in an abnormal state, and release the release assembly from the ship when the molten salt flows into the release assembly.

[0007] Technical Solution

[0008] According to one embodiment of the present disclosure, an emergency release device includes: a release assembly configured to receive molten salt from a ship equipped with a reactor vessel in which the molten salt flows; and a valve assembly configured to allow the molten salt to flow from the reactor vessel into the release assembly under an abnormal state when the temperature of the reactor vessel is not within a predetermined range, and to be connected to the release assembly when the molten salt flows from the reactor vessel into the release assembly.

[0009] Furthermore, the valve assembly may include a first passage for receiving molten salt from the reactor vessel in an abnormal state, and a second passage detachably connected to the first passage and providing a flow path for the molten salt introduced through the first passage to flow into the release assembly.

[0010] Furthermore, the valve assembly may further include a detachable valve module configured to allow the molten salt introduced from the first passage to flow into the release assembly in an abnormal state, and to stop the flow of the molten salt once the flow of the molten salt into the release assembly is completed.

[0011] In addition, the detachable valve module may include a piston configured to open a flow path when moved to one side and to close the flow path when moved to the other side; and an elastic member providing elastic force to move the piston to the other side.

[0012] In addition, the detachable valve module may include: a cylindrical coil, which generates an electromagnetic force when power is supplied to the cylindrical coil from an external source; and a piston, which is configured to open a flow path when moved to one side and to close the flow path when moved to the other side, wherein when the electromagnetic force is generated in the cylindrical coil, the piston can be moved to one side, and when the electromagnetic force is not generated in the cylindrical coil, the piston can be moved to the other side through an elastic member.

[0013] In addition, the emergency release device may also include a controller for controlling the direction of the current applied to the cylindrical coil, wherein the piston may have magnetic properties, and the controller may control the direction of the current applied to the cylindrical coil so that the cylindrical coil generates an electromagnetic force to move the piston away from the cylindrical coil.

[0014] Furthermore, the valve assembly may further include an attachment / detachment actuator for connecting the first channel and the second channel to each other when the molten salt flows into the release assembly, and detaching the first channel and the second channel from each other once the molten salt flows into the release assembly.

[0015] In addition, the attachment / detachment actuator may include a magnetized member coil, which generates an electromagnetic force when power is supplied to the magnetized member coil from an external source, and the detachable valve module may include a cylinder arranged in the second channel, and when the electromagnetic force is generated in the magnetized member coil, the cylinder can move toward the magnetized member coil to allow the second channel to be connected to the first channel, and when the electromagnetic force is not generated in the magnetized member coil, the cylinder can move away from the magnetized member coil to allow the second channel to be separated from the first channel.

[0016] In addition, the emergency release device may further include a controller for controlling power supply to the magnetized member coil, wherein when the molten salt flows into the release component, the controller controls to supply power to the magnetized member coil, and once the molten salt flows into the release component, the controller controls not to supply power to the magnetized member coil.

[0017] In addition, the emergency release device may also include a controller for controlling the direction of the current applied to the magnetized member coil, wherein the detachable valve module includes: a cylindrical coil that receives power from the outside to form an electromagnetic force; and a piston that has magnetic properties and moves away from the cylindrical coil when an electromagnetic force is generated in the cylindrical coil, and wherein the controller controls the direction of the current applied to the magnetized member coil so that when the cylindrical coil generates an electromagnetic force to move the piston away from the cylindrical coil, the magnetized member coil generates an electromagnetic force to move the magnetized member coil toward the cylindrical coil.

[0018] In addition, the release assembly may include a molten salt tank, the interior of which is maintained in a vacuum state under a normal state in which the temperature of the reactor vessel is controlled within a predetermined range, and under an abnormal state, the interior of the molten salt tank is filled with molten salt introduced from the reactor vessel through the valve assembly.

[0019] In addition, the releasing assembly may further include a heater for heating the molten salt tank so that the molten salt filled in the molten salt tank may be maintained in a liquid state.

[0020] Furthermore, the emergency release device may further include a controller for controlling the heater, wherein when the molten salt is filled in the molten salt tank, the controller controls the heater to heat the molten salt tank.

[0021] In addition, the release assembly may further include: an outer tank containing gas that expands due to heat exchange with molten salt in the molten salt tank in an abnormal state; and a pipe that receives the expanded gas from the outer tank in the abnormal state.

[0022] In addition, the release assembly may also include: an injection channel that provides a path for inflation gas to flow from the outer tank to the tube; and an injection check valve arranged in the injection channel to allow inflation gas to flow from the outer tank to the tube while preventing gas from flowing from the tube to the outer tank.

[0023] Furthermore, the outer tank may include: a housing tank configured to accommodate the molten salt tank and shield radiation emitted from the molten salt accommodated in the molten salt tank; and a gas storage tank accommodating a gas.

[0024] In addition, a plurality of gas storage spaces may be formed in the outer tank to accommodate the gas, and the plurality of gas storage spaces may be independently partitioned so as not to communicate with each other in the outer tank.

[0025] In addition, the emergency release structure may include: a ship, the ship including a hull and a ballast tank arranged inside the hull; a reactor unit, the reactor unit is arranged inside the hull and includes a reactor vessel in which molten salt flows; and an emergency release device, the emergency release device is used to discharge the molten salt discharged from the reactor vessel under an abnormal state when the temperature of the reactor vessel is outside a predetermined range to the outside of the ship, wherein the emergency release device includes: a release assembly, the release assembly is configured to receive the molten salt; and a valve assembly, the valve assembly is configured to allow the molten salt to flow from the reactor vessel into the release assembly under an abnormal state, and is connected to the release assembly when the molten salt flows into the release assembly.

[0026] Additionally, a release assembly may be provided in the ballast tank.

[0027] In addition, the release assembly may include a molten salt tank, the interior of which is maintained in a vacuum state under a normal state in which the temperature of the reactor vessel is controlled within a predetermined range, and under an abnormal state, the interior of the molten salt tank is filled with molten salt introduced from the reactor vessel through the valve assembly, and the reactor unit may also include: a discharge channel that provides a path for the molten salt to flow from the reactor vessel to the valve assembly; and a discharge valve that is arranged in the discharge channel and is opened or closed to allow or prevent the flow of molten salt in the discharge channel.

[0028] Effects of the Invention

[0029] According to one embodiment of the present disclosure, in an abnormal state, molten salt of the reactor unit may flow into the release assembly through the valve assembly, and when the flow of the molten salt into the release assembly is completed, the release assembly may be released from the vessel.

[0030] For example, in an abnormal state, the detachable valve module can selectively allow the molten salt flowing out of the reactor vessel to flow into the release assembly, and can block the flow of the molten salt when the molten salt flows into the release assembly. Therefore, even when the second channel is separated from the first channel and the release assembly is released to the outside of the ship, the molten salt will not leak out of the second channel.

[0031] In addition, once the molten salt flows into the release assembly, the release actuator can separate the first channel and the second channel from each other, and the release assembly connected to the second channel can be released to the outside of the ship. Therefore, the release assembly floating on the sea surface can be collected, and the molten salt contained in the molten salt tank can be processed separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional view of an emergency release structure according to an embodiment of the present disclosure when viewed from the side.

[0033] Figure 2 is a cross-sectional view of an emergency release structure according to an embodiment of the present disclosure when viewed from the front.

[0034] Figure 3 yes Figure 2 A partial enlarged view of .

[0035] Figure 4 is a cross-sectional view of a valve assembly of an emergency release device according to one embodiment of the present disclosure in a normal state.

[0036] Figure 5 is a cross-sectional view of a valve assembly of an emergency release device according to one embodiment of the present disclosure in an abnormal state.

[0037] Figure 6 is a cross-sectional view illustrating a state in which a first passage and a second passage of a valve assembly of an emergency release device according to one embodiment of the present disclosure are separated in an abnormal state.

[0038] Figure 7 is a diagram of a release assembly of an emergency release device according to one embodiment of the present disclosure.

[0039] Figure 8 Is the valve assembly and Figure 7 Magnified view of the release assembly of the emergency release device. DETAILED DESCRIPTION

[0040] Hereinafter, specific embodiments for realizing the technical idea of ​​the present disclosure will be described in detail with reference to the accompanying drawings.

[0041] Additionally, in describing the present disclosure, when it is determined that a detailed description of a known configuration or function may obscure the gist of the present disclosure, the detailed description will be omitted.

[0042] Further, it should be understood that when a component is referred to as being “connected to”, “supported by”, “supplied to”, “transferred to”, or “in contact with” another component, it may be directly connected to, directly supported by, directly supplied to, directly transferred to, or directly in contact with another component, but other components may be present between these components.

[0043] The terms used in this specification are only used to describe specific embodiments and are not intended to limit the present disclosure. A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0044] In addition, in this specification, expressions such as upper, lower, side, etc. are described based on the drawings, and it is clear in advance that if the direction of the object is changed, they can be expressed differently. For the same reason, some components in the drawings are exaggerated, omitted or schematically shown, and the size of each component does not completely reflect the actual size.

[0045] In addition, terms including ordinal numbers such as first, second, etc. may be used to describe various components, but these components are not limited by these terms. These terms are only used to distinguish one component from another component.

[0046] The meaning of “comprising” used in this specification specifies specific features, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other specific features, regions, integers, steps, operations, elements, components and / or groups.

[0047] In this specification, the "normal state" refers to a state in which the temperature of the reactor vessel 21 is controlled within a predetermined range by the control of the controller 300, which means that the nuclear reaction in the reactor vessel 21 is controllable. In addition, the "abnormal state" refers to a state in which the temperature of the reactor vessel 21 is not controlled by the controller 300, and may mean an emergency state such as various failures or power outages.

[0048] Hereinafter, a specific configuration of an emergency release structure 1 according to one embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0049] Reference Figures 1 to 3 In this embodiment, the emergency release structure 1 can make the molten salt (not shown) of the reactor unit 20 flow to the release assembly 200 through the valve assembly 100 in an abnormal state, and release the release assembly 200 from the ship 10 when the molten salt flows into the release assembly 200. The emergency release structure 1 may include a ship 10, a reactor unit 20, an emergency release device 30, an operating device 40, and a safety shell 50.

[0050] The vessel 10 may be a structure capable of floating on the sea. The vessel 10 may include a hull 11 and a ballast tank 12.

[0051] The hull 11 refers to a main body of the ship 10. The reactor unit 20, the emergency release device 30, the operation device 40, and the safety shell 50 may be accommodated in the hull 11. In addition, the ballast tank 12 may be provided inside the hull 11.

[0052] The ballast tank 12 may contain fluid (ballast water) to maintain stability of the hull 11. The ballast tank 12 may be provided at the side and bottom of the hull 11. In addition, a release assembly 200 (to be described later) of the emergency release device 30 may be provided inside the ballast tank 12.

[0053] The reactor unit 20 may be a molten salt reactor (MSR) using molten salt. In addition, the molten salt may be a fuel or coolant for a reactor in which nuclear fuel is dissolved in a molten fluoride or chloride, where the salt melts at a high temperature. The reactor unit 20 may be disposed inside the hull 11. In addition, the reactor unit 20 may be connected to an emergency release device 30 and an operating device 40, and may be disposed in a safety shell 50. The reactor unit 20 may include a reactor vessel 21, a discharge channel 22, and a discharge valve 23.

[0054] The reactor vessel 21 may contain molten salt therein. The reactor vessel 21 may be configured to allow the molten salt to be discharged into the discharge channel 22. For example, when the reactor is in a normal state of normal operation, the molten salt in the reactor vessel 21 may be prevented from being discharged into the discharge channel 22. In addition, when the reactor is in an abnormal state of abnormal operation, the molten salt in the reactor vessel 21 may be discharged into the discharge channel 22. At the same time, a core in which a nuclear reaction occurs may be placed in the reactor vessel 21.

[0055] In an abnormal state, the discharge channel 22 can provide a path for the molten salt in the reactor vessel 21 to flow to the first channel 110 of the emergency release device 30, which will be described later. For example, one side of the discharge channel 22 can be connected to the reactor vessel 21, and the other side can be connected to the first channel 110 of the emergency release device 30.

[0056] The discharge valve 23 may be provided in the discharge channel 22, and may be opened or closed to allow or prevent the flow of the molten salt in the discharge channel 22. For example, the discharge valve 23 is closed in a normal state, and is opened in an abnormal state, so that the molten salt discharged from the reactor vessel 21 may flow through the discharge channel 22 to the first channel 110 of the emergency release device 30. Meanwhile, the discharge valve 23 may be connected to the controller 300, which controls the opening or closing of the discharge valve 23.

[0057] Reference Figures 4 to 6 In an abnormal state, the emergency release device 30 can allow the molten salt in the reactor vessel 21 to flow into the release assembly 200 through the valve assembly 100, and when the molten salt flows into the release assembly 200, the release assembly 200 can be released from the vessel 10. The emergency release device 30 may include a valve assembly 100, a release assembly 200, and a controller 300.

[0058] In an abnormal state, the valve assembly 100 can flow molten salt from the reactor vessel 21 into the release assembly 200, and detach the release assembly 200 in which the flow of the molten salt is completed. The valve assembly 100 may include a first channel 110, an attachment / detachment actuator 120, a second channel 130, a detachable valve module 140, and a battery 150.

[0059] In an abnormal state, the first channel 110 may receive molten salt from the reactor vessel 21. For example, in an abnormal state, the molten salt may flow from the reactor vessel 21 into the first channel 110 through the discharge channel 22. In the first channel 110, a flow path through which the introduced molten salt flows may be formed. The first channel 110 may be detachably connected to the second channel 130 by the attachment / detachment actuator 120, a detailed description of which will be provided later. Meanwhile, in a state in which the first channel 110 is connected to the second channel 130 by the attachment / detachment actuator 120, the molten salt introduced into the first channel 110 may selectively flow into the second channel 130 through the detachable valve module 140.

[0060] The attachment / detachment actuator 120 can connect the first channel 110 and the second channel 130 to each other when the molten salt flows to the release assembly 200, and can separate the first channel 110 and the second channel 130 from each other when the molten salt flows to the release assembly 200. The attachment / detachment actuator 120 can be disposed in the first channel 110. When the molten salt introduced from the reactor vessel 21 flows to the release assembly 200 through the first channel 110 and the second channel 130, the attachment / detachment actuator 120 can connect the first channel 110 and the second channel 130 to each other. In addition, once the molten salt introduced from the reactor vessel 21 flows to the release assembly 200 through the first channel 110 and the second channel 130, the attachment / detachment actuator 120 can separate the first channel 110 and the second channel 130 from each other. The attachment / detachment actuator 120 may include a magnetized member 121 and a magnetized member coil 122.

[0061] The magnetizing member 121 may support the magnetizing member coil 122. The magnetizing member 121 may be placed at one end of the first channel 110. The magnetizing member 121 may be formed of a conductive member such as metal.

[0062] When power is supplied to the magnetized member coil 122 from an external source, the magnetized member coil 122 may generate an electromagnetic force. For example, the magnetized member coil 122 may be connected to the first battery 151 and receive power therefrom to generate an electromagnetic force. When power is supplied to the magnetized member coil 122 to generate an electromagnetic force, the cylinder 141 (described later) of the detachable valve module 140 may be moved to be adjacent to the magnetized member coil 122 by the electromagnetic force. In other words, when the cylinder 141 is positioned adjacent to the magnetized member coil 122, the second channel 130 to which the cylinder 141 is connected may be connected in communication with the first channel 110. In addition, when power is not supplied to the magnetized member coil 122, the cylinder 141 of the detachable valve module 140 may move away from the magnetized member coil 122. In other words, the second channel 130 to which the cylinder 141 is connected may be separated from the first channel 110.

[0063] The direction of the current applied to the magnetized member coil 122 can be controlled by the controller 300. For example, when the current is in one direction (in Figure 4 When the current flows through the magnetized member coil 122, according to Ampere's right-hand rule, the current can flow to the right on one side of the magnetized member coil 122. Figure 4 The lower side of the S pole can be formed on the other side ( Figure 4 The upper side of the middle) forms the N pole. Although the current is in one direction (in Figure 4 The flow of the removable valve module 140 to the right (in the middle) passes through the cylindrical coil 142 (which will be described later) and on the other side of the cylindrical coil 142 ( Figure 4 The N pole is formed on the upper side of the magnetized member coil 122, but when the current flows to the magnetized member coil 122 in one direction through the controller 300, the N pole can be formed on one side of the magnetized member coil 122 ( Figure 4 In this case, an attraction force is generated between the magnetizing member coil 122 and the cylindrical coil 142 to connect the first channel 110 and the second channel 130 to each other. In other words, the direction of the current flowing in the magnetizing member coil 122 can be controlled by the controller 300 to allow the molten salt to flow to the release assembly 200 through the first channel 110 and the second channel 130 in the case of an abnormal state. When the flow of the molten salt to the release assembly 200 is completed, the current can be controlled not to be applied to the magnetizing member coil 122, and the first channel 110 and the second channel 130 can be separated from each other ( Figure 6 ). The magnetizing member coil 122 may be wound around the outer circumferential surface of the magnetizing member 121 .

[0064] The second channel 130 may provide a flow path for the molten salt introduced through the first channel 110 to flow to the release assembly 200. The detachable valve module 140 may be disposed in the second channel 130, and the second channel 130 may be selectively connected to or separated from the first channel 110 by the attachment / detachment actuator 120 disposed in the first channel 110. For example, when power is supplied to the magnetized member coil 122 of the attachment / detachment actuator 120 disposed in the first channel 110 and an electromagnetic force is generated, the cylinder 141 of the detachable valve module 140 moves toward the magnetized member coil 122, so that the second channel 130 may be connected to the first channel 110 to communicate with each other. In addition, when power is not supplied to the magnetized member coil 122 and thus no electromagnetic force is generated, the cylinder 141 may move away from the magnetized member coil 122, so that the second channel 130 may be separated from the first channel 110. The release assembly 200 may be connected to the second passage 130 , and when the second passage 130 is separated from the first passage 110 , the release assembly 200 may be released to the outside of the vessel 10 .

[0065] The detachable valve module 140 may be configured to selectively allow the molten salt flowing out of the first channel 110 to flow to the release assembly 200 in the case of an abnormal state, and to block the flow of the molten salt in the second channel 130 once the molten salt flows to the release assembly 200. The detachable valve module 140 may be disposed in the second channel 130. The detachable valve module 140 may include a cylinder 141, a cylinder coil 142, a piston 143, an elastic member 144, a piston guide 145, and an enlarged portion 146.

[0066] The cylinder 141 is disposed in the second channel 130, and a cylinder hole 141a into which the piston 143 can be inserted can be formed in the cylinder 141. The cylinder hole 141a can be closed when the piston 143 is inserted therein, and can be opened when the piston 143 moves to be separated therefrom. When the cylinder hole 141a is opened, a flow path can be formed in the cylinder hole 141a, and the molten salt introduced into the second channel 130 flows through the flow path. In other words, when the piston 143 moves to be separated from the cylinder 141, the molten salt introduced into the second channel 130 can flow in the second channel 130 through the cylinder hole 141a. Meanwhile, when the piston 143 is formed to be disposed in the opening of the second channel 130 with a diameter corresponding to the inner diameter of the second channel 130, the cylinder 141 may not be installed in the second channel 130.

[0067] When power is supplied to the cylindrical coil 142 from an external source, the cylindrical coil 142 may generate an electromagnetic force. In an abnormal state, when power is supplied to the cylindrical coil 142 and an electromagnetic force is generated, the piston 143 may move in a direction away from the cylindrical coil 142. For example, the piston 143 may have magnetic properties, and in the case where a magnetic forming portion 143a (described later) of the piston 143 is formed as an S pole, when current is applied in one direction (in Figure 5 When the current flows through the cylindrical coil 142, according to Ampere's right-hand rule, the current can flow to the right on the other side of the cylindrical coil 142. Figure 5 The N pole is formed on the upper side of the Figure 5 Therefore, a repulsive force is generated between the cylindrical coil 142 and the piston 143, so that the piston 143 can move away from the cylindrical coil 142. In this case, the cylindrical hole 141a of the cylinder 141 is opened so that the molten salt can flow into the release assembly 200 through the second channel 130.

[0068] Once the molten salt flows into the release assembly 200, the controller 300 controls not to supply power to the cylinder coil 142, and the piston 143 can move toward the cylinder 141 through the elastic member 144 (see Figure 6 ). When the piston 143 is inserted into the cylinder 141 and the cylinder hole 141a of the cylinder 141 is closed, the molten salt can be prevented from flowing out of the second channel 130. Therefore, even if the second channel 130 is separated from the first channel 110 and the release assembly 200 is released to the outside of the ship 10, the molten salt will not leak out of the second channel 130.

[0069] The direction of the current applied to the cylindrical coil 142 can be controlled by the controller 300. For example, when the magnetic forming portion 143a of the piston 143 is formed as an S pole, the controller 300 can control the current in one direction (in Figure 5 In this case, on the other side of the cylindrical coil 142 ( Figure 5 The N pole is formed on the upper side of the Figure 5 The S pole is formed on the lower side of the cylindrical coil 142, so that a repulsive force is generated between the cylindrical coil 142 and the piston 143, causing the piston 143 to move away from the cylindrical coil 142. In addition, when the magnetic forming portion 143a of the piston 143 is formed as an N pole, the controller 300 can control the current to flow in the other direction (in the lower side) in an abnormal state. Figure 5 In this case, on the other side of the cylindrical coil 142 ( Figure 5 The S pole is formed on the upper side of the Figure 5An N pole is formed on the lower side of the cylindrical coil 142, so that a repulsive force is generated between the cylindrical coil 142 and the piston 143, causing the piston 143 to move away from the cylindrical coil 142.

[0070] The piston 143 may be moved to be spaced apart from or inserted into the cylindrical hole 141a of the cylinder 141. The piston 143 may have magnetic properties, and the piston 143 may be moved to be spaced apart from the cylindrical hole 141a by the electromagnetic force generated by the cylindrical coil 142. For example, the magnetic forming portion 143a having magnetic properties may be provided on the other side of the piston 143 adjacent to the cylinder 141 ( Figure 5 In the case where the magnetic forming portion 143a is formed as an S pole, when the current is in one direction (in Figure 5 When the flow passes through the cylindrical coil 142, the other side of the cylindrical coil 142 ( Figure 5 The N pole is formed on the upper side of the Figure 5 Therefore, a repulsive force is generated between the cylindrical coil 142 and the piston 143, causing the piston 143 to move away from the cylindrical coil 142. In this case, the cylindrical hole 141a of the cylinder (141) is opened so that the molten salt can flow into the release assembly 200 through the second channel 130.

[0071] The piston 143 may be moved to be inserted into the cylindrical hole 141a by the elastic force of the elastic member 144. For example, when the cylindrical coil 142 is not powered and thus no electromagnetic force is generated, the elastic member 144 may move the piston 143 to be inserted into the cylindrical hole 141a by the elastic force that moves the piston 143 toward the cylindrical hole 141a of the cylinder 141. In this case, the cylindrical hole 141a may be closed, and the flow of the molten salt in the second channel 130 may be blocked. At the same time, a piston guide 145 extending through one side end portion of the piston 143 is provided, and the piston guide 145 may guide the piston 143 to move to one side or the other side.

[0072] Meanwhile, the piston 143 may be configured to open the flow path of the second channel 130 when moved to one side, and to close the flow path of the second channel 130 when moved to the other side. When the piston 143 is formed to be disposed in the opening of the second channel 130 with a diameter corresponding to the inner diameter of the second channel 130, the cylinder 141 may not be installed in the second channel 130. In this case, the piston 143 may be moved by the attractive force or repulsive force applied by the cylinder coil 142 to directly open or close the flow path of the second channel 130.

[0073] The elastic member 144 may provide an elastic force to move the piston 143 toward the cylinder hole 141a of the cylinder 141. One side of the elastic member 144 may be in contact with the piston 143, and the other side of the elastic member 144 may be in contact with the cylinder 141. In addition, the elastic member 144 may be arranged to be wound around the piston guide 145 to be guided by the piston guide 145 when the elastic member 144 is stretched or contracted. The elastic member 144 may include a tension spring that provides an elastic force to move the piston 143 toward the cylinder hole 141a of the cylinder 141.

[0074] The piston guide 145 may guide the movement of the piston 143. The piston guide 145 may be formed to penetrate a side end portion of the piston 143, and may be provided in a plurality of pieces. In addition, the elastic member 144 may be arranged around the piston guide 145 so that the extension or contraction of the elastic member 144 may be guided by the piston guide 145.

[0075] The enlarged portion 146 can expand the inner diameter of the second channel 130. The enlarged portion 146 can be arranged in the second channel 130. The molten salt introduced into the second channel 130 flows into the second channel 130 through the cylindrical hole 141a of the cylinder 141. In this case, if the diameter of one side end portion of the piston 143 is formed to be relatively large to correspond to the diameter of the cylinder 141 as shown in the figure, the molten salt can flow along the inner peripheral surface of the second channel 130 enlarged by the enlarged portion 146. However, if the diameter of one side end portion of the piston 143 is formed to be relatively smaller than the inner diameter of the cylinder 141, the molten salt can flow along the outer peripheral surface of the piston 143, so the enlarged portion 146 may not be arranged in the second channel 130. At the same time, the enlarged portion 146 can support one end of the guide pin.

[0076] The battery 150 may include a first battery 151 for supplying power to the magnetizing member coil 122 and a second battery 152 for supplying power to the cylindrical coil 142. Meanwhile, the direction of current applied to the magnetizing member coil 122 and the cylindrical coil 142 by the first battery 151 and the second battery 152 may be controlled by the controller 300.

[0077] Reference Figure 7 and Figure 8, the release assembly 200 is configured to receive the molten salt from the reactor vessel 21 through which the molten salt flows, and once the molten salt flows into the release assembly 200, the release assembly 200 can be released to the outside of the ship 10 through the valve assembly 100. For example, once the molten salt flows into the release assembly 200, the first channel 110 and the second channel 130 are separated by the attachment / detachment actuator 120 and the detachable valve module 140, and the release assembly 200 connected to the second channel 130 can be released to the outside of the ship 10 and float on the sea surface. At the same time, the release assembly 200 can be set in the ballast tank 12. Therefore, it is possible to prevent the radiation generated from the molten salt when the molten salt flows into the release assembly 200 in an abnormal state from being emitted to the outside of the ballast tank 12. The release assembly 200 may include a molten salt tank 210, an outer tank 220, an injection channel 230, an injection check valve 240, a pipe 250, a heater 260, and a power supply unit 270.

[0078] The molten salt tank 210 can be maintained in a vacuum state under normal conditions. Meanwhile, vacuum is defined as a broad concept including a negative pressure state where the pressure is lower than the atmospheric pressure. In addition, the molten salt tank 210 can be filled with molten salt flowing through the valve assembly 100 from the reactor vessel 21 under abnormal conditions. For example, under abnormal conditions, when the first channel 110 and the second channel 130 are connected to each other by the attachment / detachment actuator 120 and the detachable valve module 140, when the cylinder coil 142 is powered to move the piston 143 away from the cylinder 141, the molten salt can flow into the molten salt tank 210 through the first channel 110 and the second channel 130. In this case, the molten salt can be introduced into the molten salt tank 210 with a relatively low pressure through the second channel 130.

[0079] The heater 260 can be wound around the outer peripheral surface of the molten salt tank 210, and the molten salt tank 210 and the molten salt in the molten salt tank 210 can be heated by the heater 260. When the molten salt is heated, the molten salt can be kept in a liquid state. When the release assembly 200 is released to the outside of the ship 10 and floats on the sea, the molten salt in the molten salt tank 210 may gradually cool and solidify. If the molten salt solidifies, it may be difficult to recover the molten salt in the molten salt tank 210. Therefore, when the molten salt tank 210 and the molten salt are heated by the heater 260 to keep the molten salt in a liquid state, the molten salt can be easily recovered from the molten salt tank 210. The liquid molten salt can be recovered from the molten salt tank 210 to the outside through the second channel 130.

[0080] The outer tank 220 may contain the molten salt tank 210 to surround it. The outer tank 220 may include a gas storage tank 221 and a shell tank 222.

[0081] The gas storage tank 221 may contain a gas that expands by exchanging heat with the molten salt in the molten salt tank 210. The gas storage tank 221 may surround the molten salt tank 210 to contact the outer peripheral surface of the molten salt tank 210. Therefore, the heat of the relatively high temperature molten salt may be transferred to the gas storage tank 221 through the molten salt tank 210. When the relatively high temperature heat is transferred to the gas in the gas storage tank 221, the gas may expand. The expanded gas may flow into the tube 250 through the injection channel 230. The gas may include helium, which may expand when heated.

[0082] The gas storage tank 221 may have a plurality of gas storage spaces for accommodating gas. The plurality of gas storage spaces may be independently partitioned so as not to be connected to each other. A plurality of injection channels 230 may be connected to the plurality of independently partitioned gas storage spaces. In addition, a plurality of gas storage tanks 221 may be provided. The plurality of gas storage tanks 221 may be independently partitioned so as not to be connected to each other, and a plurality of injection channels 230 may be connected to the plurality of independently partitioned gas storage tanks 221.

[0083] The housing tank 222 may be configured to accommodate the molten salt tank 210 and the gas storage tank 221, and shield radiation generated from the molten salt accommodated in the molten salt tank 210. For example, a radiation shielding material may be accommodated in the housing tank 222.

[0084] The injection channel 230 may provide a path for the expansion gas to flow from the gas storage tank 221 to the tube 250. A plurality of injection channels 230 may be provided, and one end of the plurality of injection channels 230 may be connected to a plurality of independently separated gas storage spaces or a plurality of independently separated gas storage tanks 221, and the other end may be connected to a plurality of tubes 250.

[0085] The injection check valve 240 may be disposed in the injection passage 230 to allow the inflation gas to flow from the gas storage tank 221 to the tube 250 while preventing the gas from flowing from the tube 250 to the gas storage tank 221. For example, the injection check valve 240 may include a check valve configured to allow only the inflation gas to flow from the gas storage tank 221 to the tube 250. A plurality of injection check valves 240 may be provided to be disposed in the plurality of injection passages 230.

[0086] In an abnormal state, the expansion gas from the gas storage tank 221 can be introduced into the tube 250 through the injection channel 230. When the gas is introduced into the tube 250, buoyancy is generated, thereby allowing the release assembly 200 to float on the sea surface. The tube 250 can be configured to remain relatively contracted in a normal state and expand when the gas is introduced therein from the gas storage tank 221 through the injection channel 230. A plurality of tubes 250 may be provided, and the plurality of tubes 250 may be connected to the plurality of injection channels 230.

[0087] The heater 260 may heat the molten salt tank 210 so that the molten salt filled in the molten salt tank 210 is maintained in a liquid state. The heater 260 may include a heating coil that generates heat when power is supplied to the heating coil. The heater 260 may extend to be wound around the outer peripheral surface of the molten salt tank 210.

[0088] The power supply unit 270 may supply power to the heater 260. The power supply unit 270 may be connected to the controller 300, and its operation may be controlled. For example, when the reactor vessel 21 is in an abnormal state and molten salt is filled into the molten salt tank 210, the power supply unit 270 may be controlled by the controller 300 to heat the molten salt tank 210.

[0089] Refer again Figures 4 to 6 , the controller 300 may control the power supply to the magnetizing member coil 122. For example, in an abnormal state, when the controller 300 controls to supply power to the magnetizing member coil 122, an electromagnetic force is generated in the magnetizing member coil 122, so that the cylinder 141 may move to be adjacent to the magnetizing member coil 122, and the first channel 110 and the second channel 130 may be connected to each other. In addition, when the controller 300 controls not to supply power to the magnetizing member coil 122, the cylinder 141 may move away from the magnetizing member coil 122, and the first channel 110 and the second channel 130 may be separated from each other.

[0090] In addition, the controller 300 may control the direction of the current applied to the magnetizing member coil 122. For example, in an abnormal state, when the controller 300 controls the current to flow through the magnetizing member coil 122 in one direction, an attractive force is generated between the magnetizing member coil 122 and the cylindrical coil 142, so that the first channel 110 and the second channel 130 can be connected to each other.

[0091] The controller 300 may control the power supply to the cylindrical coil 142. For example, in an abnormal state, when the controller 300 controls to supply power to the cylindrical coil 142, the piston 143 may move in a direction away from the cylindrical coil 142, and the cylindrical hole 141a of the cylinder 141 may be opened so that the molten salt may flow in the second channel 130. In addition, when the controller 300 does not supply power to the cylindrical coil 142, the piston 143 may move toward the cylindrical coil 142 through the elastic member 144, and the cylindrical hole 141a of the cylinder 141 may be closed, so that the molten salt may be prevented from leaking out of the second channel 130.

[0092] In addition, the controller 300 can control the direction of the current applied to the cylindrical coil 142. For example, when the magnetic forming portion 143a of the piston 143 is formed as an S pole, in an abnormal state, the controller 300 can control the current to flow through the cylindrical coil 142 in one direction. In addition, when the magnetic forming portion 143a of the piston 143 is formed as an N pole, in an abnormal state, the controller 300 can control the current to flow through the cylindrical coil 142 in another direction. In the above two cases, a repulsive force is generated between the cylindrical coil 142 and the piston 143 to move the piston 143 away from the cylindrical coil 142, and the cylindrical hole 141a of the cylinder 141 is opened so that the molten salt can flow in the second channel 130.

[0093] The controller 300 may control the discharge valve 23 to block the discharge valve 23 in a normal state and open the discharge valve 23 in an abnormal state. When the controller 300 opens the discharge valve 23 in an abnormal state, the molten salt may flow from the reactor vessel 21 to the first channel 110 through the discharge channel 22.

[0094] In addition, when the molten salt is filled in the molten salt tank 210 in an abnormal state, the controller 300 may control the power supply unit 270 to heat the molten salt tank 210 .

[0095] Meanwhile, the controller 300 may be implemented by a computing device including a microprocessor, a memory, etc., and the implementation method is obvious to those skilled in the art, so a detailed description thereof will be omitted.

[0096] The operating device 40 may include a steam generator connected to the reactor unit 20 and a turbine operated using steam supplied from the steam generator. The turbine may be configured to rotate a propeller of the ship 10. A portion of the operating device 40 may be disposed within the safety housing 50.

[0097] The safety housing 50 may house the reactor unit 20. The safety housing 50 may be configured to shield radiation emitted from the molten salt housed in the molten salt tank 210. A plurality of safety housings 50 may be provided and may house a portion of the operating device 40.

[0098] Hereinafter, the operation and effects of the emergency release structure 1 having the above-described configuration will be described.

[0099] In a normal state, the molten salt flows in the reactor vessel 21 of the reactor unit 20, and the molten salt is not discharged to the outside of the reactor vessel 21. Meanwhile, in a normal state, power is supplied to the magnetized member coil 122 of the attachment / detachment actuator 120 to move and position the cylinder 141 of the detachable valve module 140 adjacent to the magnetized member coil 122, so that the first channel 110 and the second channel 130 can be connected to each other. In this case, power is not supplied to the cylinder coil 142, so that the piston 143 is maintained at a position to close the cylinder hole 141a of the cylinder 141.

[0100] In an abnormal state, the discharge valve 23 is opened, and molten salt flows from the reactor vessel 21 into the first channel 110 of the valve assembly 100 through the discharge channel 22 .

[0101] In an abnormal state, the attachment / detachment actuator 120 may connect the first channel 110 and the second channel 130 to each other while the molten salt introduced from the reactor vessel 21 flows to the release assembly 200 through the first channel 110 and the second channel 130. For example, in an abnormal state, when the controller 300 applies power to the magnetizing member coil 122, an electromagnetic force is generated in the magnetizing member coil 122, causing the cylinder 141 to move adjacent to the magnetizing member coil 122, so that the first channel 110 and the second channel 130 may be connected to communicate with each other.

[0102] In an abnormal state, the detachable valve module 140 can selectively allow the molten salt introduced from the first channel 110 to flow to the release assembly 200, and once the molten salt flows to the release assembly 200, the flow of the molten salt can be stopped. For example, when the controller 300 applies power to the cylindrical coil 142 in an abnormal state, the piston 143 can move away from the cylindrical coil 142, and the cylindrical hole 141a of the cylinder 141 can be opened so that the molten salt can flow into the release assembly 200 through the second channel 130. Once the molten salt flows to the release assembly 200, the detachable valve module 140 can stop the flow of the molten salt. For example, when the controller 300 does not power the cylindrical coil 142, the piston 143 can move toward the cylindrical coil 142 through the elastic member 144. In this case, the cylindrical hole 141a of the cylinder 141 can be closed to prevent the molten salt from flowing out of the second channel 130. Therefore, even if the second passage 130 is separated from the first passage 110 and the releasing assembly 200 is released to the outside of the vessel 10 , the molten salt does not leak out of the second passage 130 .

[0103] Once the molten salt flows into the release assembly, the attachment / detachment actuator 120 can separate the first channel 110 and the second channel 130 from each other. For example, when the controller 300 does not supply power to the magnetizing member coil 122, the cylinder 141 can move away from the magnetizing member coil 122, and the first channel 110 and the second channel 130 can be separated from each other. Therefore, the release assembly 200 connected to the second channel 130 can be released to the outside of the vessel 10.

[0104] Once the introduction of the molten salt is completed through the valve assembly 100, the release assembly 200 can be released to the outside of the ship 10. For example, once the introduction of the molten salt to the release assembly 200 is completed, the first channel 110 and the second channel 130 are separated by the attachment / detachment actuator 120 and the detachable valve module 140, and the release assembly 200 connected to the second channel 130 can be released to the outside of the ship 10 to float on the sea surface. The release assembly 200 floating on the sea surface can be collected, and the molten salt contained in the molten salt tank 210 can be processed separately.

[0105] Although the embodiments of the present disclosure have been described as specific embodiments, this is only an example, and the present disclosure should be interpreted as having the widest scope according to the technical concept disclosed herein, without being limited thereto. Those skilled in the art can realize patterns of shapes not indicated herein by combining / replacing the disclosed embodiments, but this does not deviate from the scope of the present disclosure. In addition, those skilled in the art can easily change or modify the disclosed embodiments based on this specification, and it is clear that such changes or modifications also fall within the scope of the present disclosure.

Claims

1. An emergency release device, include: a release assembly configured to receive molten salt from a vessel equipped with a reactor vessel in which the molten salt flows; as well as A valve assembly is configured to allow the molten salt to flow from the reactor vessel into the release assembly in an abnormal state in which the temperature of the reactor vessel is not within a predetermined range, and is connected to the release assembly when the molten salt flows from the reactor vessel into the release assembly.

2. The emergency release device according to claim 1, wherein the valve assembly include: a first channel for receiving the molten salt from the reactor vessel in the abnormal state; as well as A second channel is detachably connected to the first channel and provides a flow path for the molten salt introduced through the first channel to flow into the release assembly.

3. The emergency release device according to claim 2, wherein the valve assembly further comprises a detachable valve module, the detachable valve module being configured to allow the molten salt introduced from the first channel to flow into the release assembly under the abnormal state, and to stop the flow of the molten salt once the flow of the molten salt into the release assembly is completed.

4. The emergency release device according to claim 3, wherein the detachable valve module include: a piston configured to open the flow path when moved to one side and to close the flow path when moved to the other side; as well as An elastic member provides elastic force to move the piston to the other side.

5. The emergency release device according to claim 3, wherein the detachable valve module include: a cylindrical coil that generates an electromagnetic force when power is supplied to the cylindrical coil from an external source; as well as a piston configured to open the flow path when moved to one side and to close the flow path when moved to the other side, When electromagnetic force is generated in the cylindrical coil, the piston moves to the one side, and when electromagnetic force is not generated in the cylindrical coil, the piston moves to the other side through an elastic member.

6. The emergency release device according to claim 5, further comprising a controller for controlling the direction of the current applied to the cylindrical coil, wherein the piston has magnetic properties, and the controller controls the direction of the current applied to the cylindrical coil so that the cylindrical coil generates an electromagnetic force to move the piston away from the cylindrical coil.

7. The emergency release device according to claim 3, wherein the valve assembly further comprises an attachment / detachment actuator for connecting the first channel and the second channel to each other when the molten salt flows into the release assembly, and detaching the first channel and the second channel from each other once the molten salt flows into the release assembly.

8. The emergency release device of claim 7, wherein the attachment / detachment actuator comprises a magnetized member coil that generates an electromagnetic force when power is supplied to the magnetized member coil from an external source, The removable valve module includes a cylinder disposed in the second passage, and When electromagnetic force is generated in the magnetizing member coil, the cylinder moves toward the magnetizing member coil to allow the second channel to be connected to the first channel, and when electromagnetic force is not generated in the magnetizing member coil, the cylinder moves away from the magnetizing member coil to allow the second channel to be separated from the first channel.

9. The emergency release device according to claim 8, further comprising a controller for controlling the power supply to the magnetized member coil, wherein when the molten salt flows into the release component, the controller controls to supply power to the magnetized member coil, and once the molten salt flows into the release component, the controller controls not to supply power to the magnetized member coil.

10. The emergency release device according to claim 8, further comprising a controller for controlling the direction of the current applied to the magnetized member coil, The detachable valve module include: a cylindrical coil that receives electric power from the outside to form an electromagnetic force; as well as a piston having magnetic properties and moving away from the cylindrical coil when electromagnetic force is generated in the cylindrical coil, and The controller controls the direction of the current applied to the magnetized member coil so that when the cylindrical coil generates electromagnetic force to move the piston away from the cylindrical coil, the magnetized member coil generates electromagnetic force to move the magnetized member coil toward the cylindrical coil.

11. The emergency release device according to claim 1, wherein the release assembly includes a molten salt tank, the interior of the molten salt tank is maintained in a vacuum state under a normal state in which the temperature of the reactor vessel is controlled within the predetermined range, and under the abnormal state, the interior of the molten salt tank is filled with the molten salt introduced from the reactor vessel through the valve assembly. 12 . The emergency release device according to claim 11 , wherein the release assembly further comprises a heater for heating the molten salt tank so that the molten salt filled in the molten salt tank is kept in a liquid state.

13. The emergency release device according to claim 12, further comprising a controller for controlling the heater, in, When the molten salt is filled in the molten salt tank, the controller controls the heater to heat the molten salt tank.

14. The emergency release device according to claim 11, wherein the release assembly further comprises: include: an outer tank containing a gas, wherein the gas expands due to heat exchange with the molten salt in the molten salt tank in the abnormal state; as well as A tube receives inflation gas from the outer tank in the abnormal state.

15. The emergency release device according to claim 14, wherein the release assembly further comprises: include: an injection passage providing a path for the inflation gas to flow from the outer tank to the tube; as well as An injection check valve is disposed in the injection passage to allow the inflation gas to flow from the outer tank to the tube while preventing the gas from flowing from the tube to the outer tank.

16. The emergency release device according to claim 14, wherein the outer tank include: a housing tank configured to accommodate the molten salt tank and to shield radiation emitted from the molten salt accommodated in the molten salt tank; as well as A gas storage tank containing the gas.

17. The emergency release device according to claim 14, in, A plurality of gas storage spaces are formed in the outer tank to accommodate the gas, and the plurality of gas storage spaces are independently partitioned so as not to communicate with each other in the outer tank.

18. An emergency release structure, include: A ship comprising a hull and a ballast tank arranged inside the hull; a reactor unit disposed inside the hull and including a reactor vessel in which molten salt flows; and an emergency release device for discharging molten salt discharged from the reactor vessel to the outside of the ship in an abnormal state when the temperature of the reactor vessel is outside a predetermined range, The emergency release device comprises: a release assembly configured to receive the molten salt; as well as A valve assembly is configured to allow the molten salt to flow from the reactor vessel into the release assembly in the abnormal state, and is connected to the release assembly when the molten salt flows into the release assembly.

19. The emergency release structure of claim 18, wherein the release assembly is disposed in the ballast tank.

20. The emergency release structure according to claim 18, wherein the release assembly comprises a molten salt tank, the interior of the molten salt tank is maintained in a vacuum state in a normal state where the temperature of the reactor vessel is controlled within the predetermined range, and in the abnormal state, the interior of the molten salt tank is filled with the molten salt introduced from the reactor vessel through the valve assembly, and The reactor unit also include: a drain passage providing a path for the molten salt to flow from the reactor vessel to the valve assembly; as well as A discharge valve is provided in the discharge channel and is opened or closed to allow or prevent the flow of the molten salt in the discharge channel.

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