摘要:
The present invention relates to an apparatus for the radiometric inspection of a fuel element (100) comprising a frame (1) with an opening (2) configured so that the fuel element is moved through said opening, and with positioning means (51, 61) located in correspondence with said opening and configured for keeping at least one surface of the fuel element at a predetermined distance from a radiation detector when the fuel element is moved through said opening.
摘要:
System for detecting leaks in nuclear fuel elements inside storage containers (1) comprising: at least two scintillation detectors (9); a gas distribution box (2) and a pneumatic circuit provided with a vacuum pump (4) adapted to bring said gas from the storage container (1) to the distribution box (2) and extract part of said gas from the box (2) and bring it to the detectors (9); electronics associated with the detectors (9) adapted to quantify the Beta activity of the Krypton-85 emitted by the gas.
摘要:
The present invention relates to an apparatus for the radiometric inspection of a fuel element (100) comprising a frame (1) with an opening (2) configured so that the fuel element is moved through said opening, and with positioning means (51, 61) located in correspondence with said opening and configured for keeping at least one surface of the fuel element at a predetermined distance from a radiation detector when the fuel element is moved through said opening.
摘要:
System and procedure for the inspection of the surface of a nuclear fuel rod for the automatic detection, localization and characterization of defects, comprising a plurality of point cloud acquisition systems and translation means for the nuclear fuel rod; where the system also comprises processing means capable of transforming the point cloud into a height map, locally thresholding for the segmentation of the height map and obtaining the discontinuities in said map, classifying the discontinuities in different geometric shapes to obtain the area, length, width, position and orientation, projecting the defect on the y-axis to obtain its depth and calculating the equivalent function and its second derivative to obtain the points where the depth of the defect is maximum.
摘要:
The invention relates to a scanner for analysing nuclear fuel rods comprising a shield (1) and orifices (8,5) to locate the fuel rod (2) and one or several CZT detectors (6). The CZT detectors allow for the construction of a lightweight, simple and easily transportable scanner. The scanner is additionally advantageous in that some of the elements thereof are interchangeable.
摘要:
The invention relates to a fuel assembly for pressurised water nuclear reactors comprising a plurality of nuclear fuel rods each of which comprises a plurality of pellets with nuclear fuel. The assembly includes both pellets with high-concentration gadolinium oxide (greater or equal to 6% by weight) and pellets with medium-concentration gadolinium oxide (greater than 2% by weight and less than or equal to 4% by weight). The invention also relates to a method for loading the core of a nuclear reactor.
摘要:
High resolution radiographic inspection system for nuclear fuel rods comprising an X-ray generator tube (1) and an X-ray detector system (2), wherein the X-ray detector system (2) comprises a scintillator (4) with a thickness between 0.5 and 3mm and a density of at least 4.5 g/cm 3 , a high reflectivity mirror (5), an optical system (6) and a high quantum efficiency S-CMOS camera (7), positioned with the axis at 90° from the scintillator. By virtue of this configuration and the scintillator material, it is possible to generate images with a spatial resolution of up to 10 microns, in exposure times equivalent to or less than five seconds, maintaining a high durability of the system, and without the need for optical magnification.
摘要:
The invention relates to a scanner for analysing nuclear fuel rods comprising a shield (1) and orifices (8,5) to locate the fuel rod (2) and one or several CZT detectors (6). The CZT detectors allow for the construction of a lightweight, simple and easily transportable scanner. The scanner is additionally advantageous in that some of the elements thereof are interchangeable.