Lightweight stack bottom shielding structure for layered stacking ship and ship

By designing a layered stacked marine stack bottom shielding structure based on a frame-type double-layer bottom structure, the problem of ray backscattering at the bottom of the reactor in nuclear-powered ships and floating platforms is solved, effective shielding of the radiation field is achieved, and radiation safety in the surrounding areas is ensured.

CN119694611APending Publication Date: 2025-03-25CHINA SHIP DEV & DESIGN CENT
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Patent Information

Application Number
CN202411599273.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-11
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

In nuclear-powered ships and nuclear-powered floating platforms, neutrons and gamma rays at the bottom of the reactor are backscattered to the adjacent areas through the seawater at the bottom of the ship and the double bottom, resulting in the radiation field in the adjacent areas of the reactor seriously exceeding the standard.

Method used

A lightweight layered marine stack bottom shielding structure is designed, including shielding body, thin steel plate and angle steel, and is arranged based on a frame-type double-layer bottom structure to form an approximate circular polygonal structure to shield the rays at the bottom of the reactor.

Benefits of technology

It effectively solves the problem of ray backscattering at the bottom of the reactor, weakens the leakage of radiation to the surrounding areas, ensures the radiation safety of personnel and equipment in the surrounding areas, and has a simple structure, light weight and convenient assembly.

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Abstract

The invention provides a light-weight layered stacking ship reactor bottom shielding structure and a ship, the light-weight layered stacking ship reactor bottom shielding structure is arranged in a double-layer bottom structure below a reactor, the shielding structure is arranged by means of a frame type double-layer bottom structure, and the shielding structure comprises a shielding body, a thin steel plate and angle steel. The reactor bottom shielding structure is a polygonal structure approximate to a circle when viewed from a plane, and the polygonal structure is arranged between the body outer contour of the reactor and the primary shielding outer contour; the reactor bottom shielding structure, the primary shielding structure and seawater below the ship body form a complete shielding system; the shielding bodies are of a plate structure and are stacked in a layered mode from bottom to top, and thin steel plates are welded on the outer sides of the shielding bodies and are welded and fixed through angle steel. According to the technical scheme, the problem that the radiation field of the adjacent area of the reactor severely exceeds the standard due to back scattering of neutrons and gamma rays at the bottom of the reactor in a nuclear power ship and a nuclear power floating platform to the adjacent area through ship bottom seawater and a double-layer bottom can be solved.
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