Inspection and sorting-out line for fuel elements

FIELD: atomic industry.

SUBSTANCE: proposed line is provided with computer-aided system for contactless control of flaw depth and profile on surface of fuel element can and on end parts including sorting-out device that functions to reject faulty fuel elements. This line is characterized in high capacity and reduced labor consumption.

EFFECT: enlarged functional capabilities, improved quality of fuel elements.

1 cl, 2 dwg

 

The invention relates to the nuclear industry and can find application in the manufacturing of fuel elements (FE) and build them into fuel assemblies (FA).

It is known that the fuel Rods are products for which the probability of failure must be extremely small, i.e. it demands high reliability. The most important parameters that are continuously monitored it the maximum allowable size of defects in the membranes, the geometric dimensions of the shells and the continuity of the column of fuel in the fuel rod (see Development. The construction and operation of fuel cell power reactors. Book 2. Edited Fgurative. - M.: Energoatomizdat, 1985, p.236). The surface quality control of pipes made of zirconium alloys and stainless steels up to this time is held by the visual method. The operation control time-consuming and inefficient. Assessment of the quality of the surface of the pipe subjective. When conducting a visual inspection usually use a set of control samples or standards of appearance, representing the pipe pieces with the most characteristic defects. As an example, in table. 21.3 description of the main defects (see ibid pp.261).

Closest to the technical essence and the achieved effect is the line of control and inspection of fuel is a separate estimate, contains the installation mechanism of the transport cassette with fuel elements for nuclear reactors VVER-1000 or VVER-440 with issuing them on a tilt table and a piece on the conveyor, along which technological sequence posted by means of control and inspection in the form of a gamma radiation source with photosensors detecting internal defects of fuel pellets, the length of a column of fuel pellets, the presence of retainers, the total gap between the fuel pellets, raspakoval output control defective fuel element in the container drive means control of the diameter and curvature, raspakoval output defective fuel element with control in container-drive, inclined tables with selectors, kickers, sensors monitor whether the position of the fuel control element VVER-1000 or VVER-440 and installation mechanism of the transport cassette receiving controlled fuel elements (see Russian Federation patent RU 2170961 from 09.06.1999,, publ. 20.07.2001, CL 7 G 21 C 17/06, 07 C 5/00. The line of control and inspection of fuel elements). Line-prototype allows you to expand its technological capabilities and to monitor and sorting different length TVEL VVER-1000 and VVER-440 and to extend the area of drives.

However, the control externally the mu surface appearance TVEL for detecting defects of mechanical origin in the form of dents, cracks, scratches, burrs, sticking and technological origin in the form of spots of oxide corrosion origin, dirt, darkening etc. is carried out by the visual method. The operation control time-consuming and inefficient. Assessment of the quality of the surface of the fuel rod is subjective. A large variety of types of defects is extremely complicates the development of instrument control methods, however, until now not yet created a means of control instruments that can replace the human eye (see Development, production and operation of fuel cell power reactors. Book 2, s). The technical challenge is to expand the technological capabilities of the line, increasing its productivity, quality of Fuel and reducing the complexity of the control.

This technical problem is solved in that the line of control and inspection of fuel elements containing the installation mechanism of the transport cassette with fuel elements for nuclear reactors VVER-1000 or VVER-440 with the issuance on the tilt table and individually on the conveyor, along which technological sequence posted by means of control and inspection in the form of a gamma radiation source with photosensors detecting internal defects of fuel pellets, the length of a column of fuel pellets, the presence of retainers, the total gap m is waiting for fuel tablets raspakoval output control defective fuel element in the container drive means control of the diameter and curvature, raspakoval output defective fuel element with control in container-drive, sloping tables with cut off the kickers, the sensors on the position of the fuel control element VVER-1000 or VVER-440 and installation mechanism of the transport cassette receiving controlled fuel elements.

According to the invention between the sloping tables with selectors, the kickers, the sensors on the position of the fuel control element on the conveyor wiring fuel element with control of the diameter and curvature of an automated system for contactless control of the depth and profile of the defects on the surface of the fuel cladding and end pieces with rubbercovered output defective fuel elements containing block system computer, monitor, block optomechanical with the illuminator and the block e, the block optomechanical contains a plate, on which the position sensor, optical table and placed on it by the interferometer, equipped with a video camera and an actuator moving a table, from the measuring arm of the interferometer on the stove strengthening the Jena front wall of the block opto-mechanical, on which is mounted a tray for placing a controlled heat-generating element, provided with a mechanism for fixing the position of the fuel element in the tray, and the electronic unit are devices control light, control of the phase modulator, the controller of the stepper motor, a uniform transducer pulses, the capacitor and the power source.

This implementation will allow to expand the technological capabilities of the line, increase productivity, quality Rods and reduce the complexity of the control.

The drawings show the line of control and inspection of fuel elements, in which figure 1 shows a General view of the line; figure 2 - automated system for contactless control of the depth and profile of the defects on the surface of the fuel element.

The line of control and inspection Below contains mechanism 1 installation transport cassette with heat-generating elements 2 for nuclear reactors VVER-1000 or VVER-440 with the issuance of the sloping table 3 and by the piece on the table 4, along which technological sequence placed controls and inspection 5 in the form of a gamma radiation source with photo-sensors detect internal defects of fuel pellets, the length of a column of fuel pellets, the presence of retainers, the total gap between the fuel pellets, raspakoval 6 is Yoda with control defective fuel element in the container-drive 7, means 8 controls the diameter and curvature, raspakoval 9 o defective fuel element with control in container-drive 10, the inclined tables 11, 12, 13, 14 with the selectors, kickers, sensors for position control of TVEL VVER-1000 or VVER-440 and the mechanism 15 installation transport cassette 5 acceptance is controlled by the fuel element.

Between the sloping tables 12, 13 with the selectors, the kickers, the sensors on the position of the fuel control element 2 on the conveyor 16 wiring the fuel element 2 with control 8 diameter and curvature installed an automated system 17 contactless control of the depth and profile of the defects on the surface of the fuel cladding 2 and end pieces with rubbercovered output defective fuel elements 2 containing block system computer 18, a monitor 19, block optomechanical 20 and the electronic unit 21, the block optomechanical 20 includes a plate 22, which is equipped with a position sensor 23, the optical table 24. located on the interferometer 25, equipped with a video camera 26 and the actuator move 27 table 24. Side of the measuring arm of the interferometer 25 in the plate 22 fortified the front wall of the opto-mechanical unit 20 on which is mounted the tray 28 to accommodate the controlled theprovides the corresponding item 2, equipped with a mechanism 29 of the fixing position of the heat generating element 2 in the tray 28, and the electronic unit 21 are devices: control illuminator 30, control of the phase modulator 31, the controller of the stepper motor 32, a uniform transducer pulses 33, the hub 34 and the power source 35, raspakoval 36 and container storage 37.

The line of control and inspection of Fuel elements is as follows.

The mechanism 1 is installed transport cassette with the fuel Rods 2 with the issuance of the sloping table 3 and apiece on the roller conveyor 4. On the roller table 4, the fuel Rods 2 are received in the tool 5 control and inspection for internal defects of fuel pellets, the length of their post, clamps, the total gap between tablets and rubbercovered 6 defective on these parameters, the fuel Rods have to be rejected in the container-drive 7. Fit the fuel Rods 2 are received in the tool 8 of the control of the diameter and curvature, where the defective fuel Rods 2 these parameters are rejected by rubbercovered 9 in the container drive 10.

Inclined tables 11, 12, 13, 14 are vehicle and drives the fuel rod 2. Controlled by these parameters, the fuel Rods 2 roller 16 serves in an automated system 17 contactless control of the depth and profile of the defects on the surface membrane of a fuel rod 2.

Measure the depth and profile of the defect is, or part thereof, located in a zone control system, carried out by scanning the surface area and data processing. The measurement results are displayed on the screen of the monitor 19 computer 18 at a convenient operator. In the control process of the fuel element 2 is placed in the tray 28 on the plate 22 and fixed by the fixing mechanism 29 and the sensor 23, the position of a fuel rod in the optical-mechanical unit 20.

Optical table 24 located on the interferometer 25, equipped with a video camera 26 and a light source 30, the actuator 27 moves vertically and horizontally and scans measured defect on the surface of the fuel rod 2.

Unit 21 e, containing the control device illuminator 30, the control device is a phase modulator 31, the controller 32 of the stepper motor, a universal Converter 33 pulses, the hub 34 and the source 35 power control unit 20 optomechanical in accordance with commands generated by the control program of the system, which is loaded in the computer 18.

Fit the fuel Rods 2 are loaded into the transport cassette mounted on the mechanism 15, and defective are removed from process rubbercovered 36 in the container drive 37.

The line of control and inspection of fuel elements containing the installation mechanism of the transport tapes with those who lofidelity elements with the issuance on the tilt table and individually on the conveyor, along which technological sequence placed controls and inspection to identify internal defects of fuel pellets, the length of a column of fuel pellets, the presence of retainers, the total gap between the fuel pellets, raspakoval output control defective fuel elements in the container drive means control of the diameter and curvature, raspakoval output defective fuel element with control in container-drive, sloping tables with selectors, kickers, sensors for position control of the fuel element and the installation mechanism of the transport cassette receiving controlled fuel elements, characterized in that between the sloping tables with selectors, the kickers, the sensors on the position of the fuel control element on the conveyor wiring fuel element with control of the diameter and curvature of an automated system for contactless control of the depth and profile of the defects on the surface of the fuel cladding and end pieces with rubbercovered output defective fuel elements containing block system computer, monitor, block optomechanical with illuminator and block opto-mechanical, containing a plate, on which the set is established with representation from the position sensor, optical table and placed on it by the interferometer, equipped with a camera and drive move a table from the side of the measuring arm of the interferometer on the stove reinforced front wall of the block opto-mechanical, on which is mounted a tray for placing a controlled heat-generating element, provided with a mechanism for fixing the position of the fuel element in the tray, and the electronic unit are devices control light, control of the phase modulator, the controller of the stepper motor, a uniform transducer pulses, the hub and the power source.



 

Same patents:

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A fuel assembly // 2242058
The invention relates to the field of thermophysical studies and can be used for studies of temperature regimes of fuel elements (FE) of nuclear reactors, in the study of different emergency modes of fuel assemblies (FA) on electrically heated stands

The invention relates to nuclear energy and may find application in the manufacturing of fuel assemblies of nuclear power reactors

The invention relates to nuclear power and may find application in the manufacturing of fuel elements (FE) and build them into fuel assemblies (FA) for a nuclear reactor

The invention relates to nuclear power, namely, the development of fuel elements, their experimental development in nuclear reactors, in particular high-temperature thermionic fuel elements when creating electricity generating channels thermionic reactor Converter

FIELD: minerals dressing.

SUBSTANCE: the offered inventions concern to dressing of minerals, in particular, to dressing of a ground mineral material. The technical result of the inventions is improved selectivity of separation of a source material by a choice of efficient way of separation and elimination of an effect of noises of a channel of registration and instability of the excitation system operation; improved automatic adjustment of the registration and excitation systems, reduction of an amount of used hardware and the time necessary for performance of the prestarting inspection and also provision of the automatic prestarting and periodic inspection and an increase of its reliability. For this purpose the separator contains means of delivery and transportation of the source material in a zone of inspection; a source of an exciting radiation; a photo-receiving device, and means of treatment of a signal of the luminescence including an analog-digital converter (ADC), a unit of the random-access memory (RAM), a register of a separation threshold and a microprocessor. In addition the separator is supplied with a register of delay and a synchronizer, the first output of which is connected to the input of the analog-digital converter start; the second output is connected to the input of the RAM; and its third output - with the input of the record of the microprocessor. The reading inputs of the random-access memory, the register of a threshold and the register of delay are connected accordingly to the first, second and third outputs of the microprocessor. The method of control over operation of the separator is based on a periodic use of its indicators in absence of a separated material for registration of intensity of their luminescence. In the capacity of an indicator they choose the air filling the volume of the separator, in the capacity of the way of separation - the normalized autocorrelation function (NACF) of a luminescence signal. At that they normalize the value of the NACF signal of the luminescence by its division by the result of integration of a square of a registered signal of a luminescence. Determine a threshold of separation equal to a threshold set at operation in a mode of separation. The value of the parameter of separation they choose so, that the value of NACF at the chosen value of the parameter exceeded the threshold.

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8 cl, 3 dwg

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