A feedthrough for shielding against a radioactive radiation, the feedthrough including: electrical feedthrough conductors; a tubular metal housing including ends and seals, the ends including a respective seals so that an interior is formed in the tubular housing between the seals, the seals including an insulating body through which an electrical feedthrough conductor is fed so that an electrical feedthrough conductor is fixed in the seals while being electrically insulated from the tubular housing; a connecting conductor extending in the interior, the connecting conductor connecting an electrical feedthrough conductor at one of the seals to an electrical feedthrough conductor at another of the seals; and shielding bodies, which are respectively interrupted by at least one opening therein, the shielding bodies being arranged successively in an axial direction of the tubular housing, the connecting conductor being fed through the opening.

A feedthrough for shielding against a radioactive radiation, the feedthrough including: electrical feedthrough conductors; a tubular metal housing including ends and seals, the ends including a respective seals so that an interior is formed in the tubular housing between the seals, the seals including an insulating body through which an electrical feedthrough conductor is fed so that an electrical feedthrough conductor is fixed in the seals while being electrically insulated from the tubular housing; a connecting conductor extending in the interior, the connecting conductor connecting an electrical feedthrough conductor at one of the seals to an electrical feedthrough conductor at another of the seals; and shielding bodies, which are respectively interrupted by at least one opening therein, the shielding bodies being arranged successively in an axial direction of the tubular housing, the connecting conductor being fed through the opening.

A method for providing a neutron radiation shield includes a step (a) of providing a wall having an opening; and a step (b) of at least partially filling a space in the opening with a neutron moderator. Step (b) includes blast-injecting plastic granules into the opening with a blower device to form the neutron moderator.

A method for providing a neutron radiation shield includes a step (a) of providing a wall having an opening; and a step (b) of at least partially filling a space in the opening with a neutron moderator. Step (b) includes blast-injecting plastic granules into the opening with a blower device to form the neutron moderator.

Disclosed are an electrical penetration assembly, a manufacturing method thereof, and an electrical penetration device, which relate to the technical field of electrical penetration. The electrical penetration assembly comprises sealing glass (5), an outer tube (4) and a conductor (7) inserted into the outer tube (4), wherein both ends of the outer tube (4) are blocked by supporting and fixing blocks (8), and both ends of the conductor (7) respectively protrude from the corresponding supporting and fixing blocks (8); the sealing glass (5) is sintered between the conductor (7) and the outer tube (4) and is configured to divide an annular cavity jointly enclosed by the conductor (7), the outer tube (4) and the supporting and fixing blocks (8) into an upper cavity and a lower cavity; an optical fiber (14) penetrates the sealing glass (5), at least one end of the optical fiber (14) is connected to an optical fiber splice (3) after protruding from the corresponding supporting and fixing block (8), and a portion of the optical fiber (14) located in the sealing glass (5) is inscribed with a fiber Bragg grating to form a first fiber Bragg grating sensor (1). By utilizing the first fiber Bragg grating sensor (1) to monitor the strain and temperature of the sealing glass (5) in real time, not only can it judge whether the electrical penetration assembly meets the requirements for hermeticity, but also enable precise control of the sintering temperature.

Disclosed are an electrical penetration assembly, a manufacturing method thereof, and an electrical penetration device, which relate to the technical field of electrical penetration. The electrical penetration assembly comprises sealing glass (5), an outer tube (4) and a conductor (7) inserted into the outer tube (4), wherein both ends of the outer tube (4) are blocked by supporting and fixing blocks (8), and both ends of the conductor (7) respectively protrude from the corresponding supporting and fixing blocks (8); the sealing glass (5) is sintered between the conductor (7) and the outer tube (4) and is configured to divide an annular cavity jointly enclosed by the conductor (7), the outer tube (4) and the supporting and fixing blocks (8) into an upper cavity and a lower cavity; an optical fiber (14) penetrates the sealing glass (5), at least one end of the optical fiber (14) is connected to an optical fiber splice (3) after protruding from the corresponding supporting and fixing block (8), and a portion of the optical fiber (14) located in the sealing glass (5) is inscribed with a fiber Bragg grating to form a first fiber Bragg grating sensor (1). By utilizing the first fiber Bragg grating sensor (1) to monitor the strain and temperature of the sealing glass (5) in real time, not only can it judge whether the electrical penetration assembly meets the requirements for hermeticity, but also enable precise control of the sintering temperature.

A conduit housing includes a top face, a pair of side faces disposed opposite each other and adjacent to the top face, a front side, and a rear side. The top face includes a plurality of vertical conduit ports arranged in a plurality of rows. The front side is positioned between the pair of side faces and defines a plurality of stepped faces. The rear side is disposed opposite the front side and adjacent the top face. The stepped faces include a plurality of downward faces and each of the plurality of downward faces defines a downward face plane. The stepped faces also include a plurality of upward faces, where each of the plurality of upward faces defines an upward face plane. Each upward face includes a plurality of pitched conduit ports.

A conduit housing includes a top face, a pair of side faces disposed opposite each other and adjacent to the top face, a front side, and a rear side. The top face includes a plurality of vertical conduit ports arranged in a plurality of rows. The front side is positioned between the pair of side faces and defines a plurality of stepped faces. The rear side is disposed opposite the front side and adjacent the top face. The stepped faces include a plurality of downward faces and each of the plurality of downward faces defines a downward face plane. The stepped faces also include a plurality of upward faces, where each of the plurality of upward faces defines an upward face plane. Each upward face includes a plurality of pitched conduit ports.

A Disclosed is a long-lifespan in-core instrument having an extended lifespan due to an enhanced combustion lifespan of an emitter. A central tube and an outer sheath tube distanced from the outer circumferential surface of the central tube are provided. Self-powered neutron detectors are placed between the central tube and outer sheath tube. Each self-powered neutron detector includes an emitter of a material having a neutron reaction cross section that is comparatively smaller than that of rhodium. A background detector for compensating for the background noise signal; core exit thermocouples for detecting the core exit temperature; and filler wires filling in the space between the self-powered neutron detectors, background detector and core exit thermocouples are provided.

A Disclosed is a long-lifespan in-core instrument having an extended lifespan due to an enhanced combustion lifespan of an emitter. A central tube and an outer sheath tube distanced from the outer circumferential surface of the central tube are provided. Self-powered neutron detectors are placed between the central tube and outer sheath tube. Each self-powered neutron detector includes an emitter of a material having a neutron reaction cross section that is comparatively smaller than that of rhodium. A background detector for compensating for the background noise signal; core exit thermocouples for detecting the core exit temperature; and filler wires filling in the space between the self-powered neutron detectors, background detector and core exit thermocouples are provided.