SU1428077A1 - Apparatus and metering device for charging loose nuclear fuel into fuel cell shell - Google Patents

Abstract

The invention relates to the field of nuclear technology, in particular, to devices for the production of heat-generating elements with granulated nuclear fuel. The aim of the invention is to improve the quality and performance when loading fuel into the fuel rod cladding of any size and improving the metering accuracy. The device comprises metering devices 1 and 2, a weighing device 5 and a device - for continuous placement of the fuel components. The device 6 is made in the form of a hollow tank with a conical bottom 7, which is equipped with a valve 8 with a drive 9. Computer 10, frequency through a converter 11 - the code is connected to the weighted device 5, through the device 12 to input discrete signals to position sensors 13 and 14, installed with the ability to interact through sectors 15 and 16 with dispensers 1 and 2, and through the device 17 the output of discrete signals - with actuators 3 and 4 and gate 8. Dispensers 1 and 2 contain a rotating drum 22 with an opening 23 and an output channel 24, a tailhole 25 to The opposite is located opposite to the hole 23 in the end wall of the drum 22. The drum 22 is provided with a partition 26 in which the hole 23 is made. Two screws 27 and 28 are installed in the inner cavity of the drum 22, the screw 28 being mounted on the drum steak 22, and the screw 27 - on the axis 29. The mechanism for adjusting the bulk fuel dose is made in the form of a sector 15 with an unfolded angle. Sector 15 is mounted for rotation with drum 22. f-ly, 7 ill. c & IMBA 00 o sl

Description

The invention relates to the field of nuclear matter, specifically to a bag made of heat-emitting elements of a dp tank for reactors using granulated fuels, and can be used to improve equipment for dispensing and loading: Into the sheath is divided, their elements - Commodity fueled nuclear fuel. The aim of the invention is to improve (improved quality and productivity) when loading S, the shell of any type of heat-absorbing element and an increase in metering accuracy.

1 shows a diagram of a device for loading a free-flowing fuel tree into the shell of a heat-emitting element; FIG. 2 is a view | along arrow A in FIG. 1; FIG. 3 shows a dispenser of a device for loading loose nuclear fuel into the sheath of a heat-gap element (section BB in FIG. 1); Fig, 4 - section bb In fig.Z; PA Fig, 5 - section of G-Gnafig. figure 6 is a section dD in figure 1; figure 7 shows the layer-by-layer size: Fused fuel fractions in the hollow cell- {bone}

i. There is a success for loading bulk fuel into the fuel cladding shell with dispensers 1 and 2 (in this case, an example is given, when there are two 5T.e. fracdies of bulk material, which are equipped with drives 3 and 4, There are a weighing device 5 and a device,; ll layering fuel components. It is made in the form

hollow tank 6 with a conical bottom 7, which is equipped with a valve 8 with a drive 9. And the weighing device 5 is installed device 6., 1

i The nuclear fuel loading device into the cladding of a fuel element is equipped with an iComputer 10, which is connected via a weighing device 5 through a frequency converter 11 through a weighing device 5, and connected to position sensors 13 and 14, which are installed with a haul. interoperability through sectors 15 and 16. with dispensers 1 and 2, and through device 17 the output of discrete signals is connected with drives 3 and 4 dispensers 1 and 2 and. gate 8. Between the feeders 1 and 2 and the hollow container 6, the blade is mounted 18, at 5

0 5 0

with;

0

5 „g

than in the container 6 itself there is an atomizer 19 in the form of a coil spring, and under it is placed another funnel 20, the neck of which is located in the shell 21 of the heat-generating element when filling the bulk material into it.

The dispenser contains a rotating drum 22 with a dispensing orifice 23 and an output channel 24, the communal opening 25 of which is located opposite the dispensing orifice 23 (see Fig. 2) in the end wall of the drum 22. The dispenser also contains a mechanism for controlling the dose of nuclear fuel that is made The video of the sector 15 is with an unfolded angle, and the sector 15 is mounted for simultaneous rotation with the drum 22. The drum 22 is provided with a partition 26 in which the dispensing opening 23 is placed. The internal cavity of the drum 22 is equipped with two m concentrically mounted screws 27 and 285 with the screw 28 mounted on the wall of the drum 22 and the screw 27 on the axis of the enemy's 29. At this, the metering hole 23 is defrosted between the end edges a and b of screws 27 and 28, respectively (see FIG. 6). Each drum 22 dispensers has a device. 30; the backfill in it bulk material, rial.

The device for loading and dispenser work in the following first way.

Each drum 22 of the dispensers 1 and 2 through the device 30 is loaded with an appropriate fraction of granulated powder B in an amount sufficient to equip several heat-generating elements. The operator pressing the computer key commands the start of fuel loading from the dispensers 1 and 2 to the device 6 for layering the fuel.

The computer 10 according to a predetermined program turns on the drive 3 of the drum 22 of the dispenser 1, which begins to rotate. The auger 28 scoops the granules to the transverse partition 26, and the auger 27 scoops off the excess granules from the septum. Thus, the height of the granulate layer in the area of the partition 26 is kept constant equal to the height of the screw 28 and does not depend on the number of granules in the drum 22. At the moment when the metering opening 23 located in the cross section

31А28077

the partition wall 26 is in the lowest position, the sector 16 begins to interact with the position sensor 1A and the computer turns off the drive 3 of the drum 22 for a predetermined time (0-1 s). At the same time, the granule flows through the metering opening 23 day off. channel 2A. Thus, a selection of portions of the granulate takes place, the magnitude of which is determined by the stopping time. Upon further rotation of the drum 22, the sector 16 ceases to interact with the position sensor 14, and the computer turns off the drive 3 of the drum 22. This completes the first duty cycle of the dispenser 1, and a portion of the granulate from the output channel 24 through the scoop hole 25 and the funnel 18 enters the hollow tank 6, with the sprayer 19, is laid in an even thin layer. After 0.5 s (the time required to calm the weighting

Bochemtsii1e this dispenser. As a result, the next portion of this fraction will change by the required amount and compensate for the deviation of the previous portion.

The first working cycle of the dispenser 1 is followed by the first working cycle of the dispenser 2, which is performed similarly. To complete the drum granule portion

2 through a funnel 18. Into a full container 6 and - ;; driver 19; the dispenser steps through

15 a even thin layer on the citCgS granulate from the drum of the dispenser ifii N The computer captures the amount of mac | of this batch and introduces a correction for the next batch of this fraction. Next is the second work cycle of par 1. The second batch of granulate and th 1, amended relative to: the first portion of the same dose. 1 | a - to the desired value (dpfc20)

device) the computer records the facts of the deviation of the actual value

tic mass of the batch and compares it with the set one and, if there is a deviation, corrects the stopping time in the subsequent working cycle of the given dispenser.

Similarly, the working cycle of the dispenser 2 occurs. Then the dispenser 1, and so on, starts up again.

During the operation of the dispensers 1 and 2, the computer calculates and stabilizes the actual average value of the mass of a portion of each component, thereby constantly maintaining the specified ratio between the components in

Bochemtsii1e this dispenser. As a result, the next portion of this fraction will change by the required amount and compensate for the deviation of the previous portion.

The first working cycle of the dispenser 1 is followed by the first working cycle of the dispenser 2, which is performed similarly. To complete the drum granule portion

2 through a funnel 18. Into a full container 6 and - ;; driver 19; the dispenser steps through

from the given one), enters the hollow-, bone 6 and is laid with a thin layer on the layer of granulate from the dispenser 2, etc. In the process of testing a given number of cycles in a hollow vessel 6, a mixture of two fractions is formed, consisting of thin alternating 1-1xs layers of each fraction. Thanks for that. . stabilization of the actual value of each portion relative to the given values is applied, the set mass of the mixture is selected, and the ratio between the fractions in the whole volume is capaciously maintained

the mixture is provided with a set of mixtures in and according to fractions.

After testing a specified number of cycles, the computer turns on the electromagnetic actuator 9 of the flap.8, and

a prepared mixture of components of the reduction in the number of transport operations,

. Entering through the funnel 20 in a vibrate-simplify maintenance and configuration

shell 21 of a fuel element. load

Due to the action of multiple small-diameter shells, due to

personal random factors, the actual mass of the portion will differ from the given one. By itself, such a single deviation within one or two portions is insignificant, but if you do not take measures to eliminate it, then the total deviation from portion to portion

will increase. In order to eliminate and compensate for such single deviations, the computer makes a correction in (.the change of stop in the subsequent rise 6.

The use of the proposed technical solution makes it possible to increase the loading performance of the shells of the heat-generating elements due to

the ability to control portions and control the stratified loading process to improve the quality of heat generating elements, i.e. reduce the number of heat sources of the x x elements returned for recycling, reduce the size of the device for loading bulk fuel into the shell of the heat absorbing element, reduce capital and operational levels. you. .

Claims (2)

1. A device for loading a dry fuel into the sheath of a heat-splitting element, containing a weighing device equipped with drives and dispensers, characterized in that, with a purpose. improving the quality and performance of fuel loading into the shell of any standard size of the fuel element of the driving element, it is equipped with a device for layer-by-layer placement of fuel components made in the form of a hollow tank with a conical bottom equipped with a motorized valve and mounted on the weighing device and a computer which, via a converter, is connected with a weighing device — through a discrete-signal input device with sensors — positioned to interact with dispensers, and through a device for outputting discrete signals with metering and damper drives. R 2. A dispenser for loading bulk fuel into the shell of a heat-generating element, the contents of the fuel cell. the dispensing drum with a metering (1.1k hole and outlet channel, the filling hole of which is located opposite the metering hole in the end wall of the drum, and 0 adjusting the dose of light fuel, which is different in that, in order to improve the metering accuracy, the drum is provided with a transverse partition in which 5, the metering opening, the inner cavity of the drum is equipped with two centrally mounted screws with screws of the opposite direction, one of the screws being fixed to 0 the wall of the drum, and the second axis on the axis. the metering hole is placed between the end edges of the screws, and the mechanism for controlling the dose of bulk material is made in the form of a sector with 5 unfolded angle, installed with the possibility of joint rotation with the drum,. Fiz. one 5 V ftsg.Z Vida Fi &. 2 8-8 Ik R FIG y-y four. Fi8.5 dd 6