DE1614361A1 - Closure device for shielding radioactive radiation - Google Patents

Description

i specimen copy

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DR. F. ZUMSTEIN - DREA86MANN I DR. R. KOENlQ8BER € lef «- DJPL.-PHYQ. R. HOLZSAUER

TEUSeRAMMBtZUMPAT CHECK ACCOUNT: MONOHS 91180

BANK ACCOUNT: BANKHAU · H. AUFHAU8ER

8 / Ln.

Gases B 34 Dui.

Reactor Centrum Nederland

DenHaag / Holland

Locking device for shielding screens radioactive radiation

The original invention relates to a sinking device, which is designed as a shielding device for radioactive radiation in a wall aue radiation protection material in the w @ nigetena aia 9utte can be rotated about an achae parallel to the axis of the tubular operator and which has an axial channel

His device of this type is obsolete for the cannula of a nuclear reactor

The great disadvantage of these previous devices is that the diameter of the movable wall part is large in relation to the diameter of the duct, which means that these devices are relatively high . 009122/0076

Costs for shielding material per unit area of the passage diameter result. In addition, they will be through the large diameter of these devices extremely unwieldy.

The invention overcomes the above disadvantage by forming a locking device in which, by * turning the feed insert or the feed insert, several Disks made of protective material, which are movably attached to the lining insert, one behind the other from the axial. Channel can be moved away, since these Soheiben are movable about an eccentric axis of rotation, the eccentric The axis may lie in an area which is infinite from the closest proximity to the axis of the tubular container can extend and wherein the discs in a / plane that

lies transversely to the axial channel, have a cross-sectional area which is smaller than the cross-sectional area of a "putter" insert and which has such a shape that the smallest Transverse dimension of the parts of each disc, which can be moved into the VereohlttÄ-etteilung in front of the canal, is practically the same fraction of the canal diameter as it is through the Number of disks is shown.

In this way one obtains a passage "opening that" compared to the diameter of the chuck insert, relative

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is large, so that in this way a large material saving achieved compared to previous devices becomes α

A further improvement is obtained if the material of the lining insert and the discs one.approximately three times

bo has a high specific weight like the material of the Wall in which the locking device is installed · In this way one obtains the advantage that the thickness dee The entire closure can be just as large as that of the protective wall, if three or a large number of three are movable Walls of the same thickness are used »

On this basis, the locking device can be designed in such a way that it does not protrude from the protective wall at any point to a considerable extent «

Thanks to this improvement, the closure device can be built with a better radiation protection performance, all in the case when it is provided outside the radiation protection wall.

The radiation protection of a material is known to be direct proportional to its specific weight. The numbers three

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or multiples of three are also optimal fourths in terms of the low material costs for building a closure device. Typical examples of material combinations for a protective wall and wall components for which a specific weight ratio of approx. 1 iu 3 is usable are basalt concrete and iron or baryfeetone and lead. Instead of pure metal , alloys can also be used. A very good alloy is made by modern cast iron, the properties of which come very close to those of steel.

The specific weights of basalt concrete and iron or of barite concrete and lead are 2.6 and 7.8 for the former and 3.5 and 11.23 for the latter.

The axis with respect to which the disks are movable is preferably oriented such that the force of gravity or a component thereof in the plane of the disks for opening or closing the channels by rotating the put-

I tereineatzes can be exploited · This way will

the actuation of the locking device welter simplified .

The invention is further explained with reference to the accompanying drawing , which shows an example of execution fora and in the

Figures 1 and 2 show a front view of a circular chuck insert with a circular axial channel,

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which can be closed by two panes.

FIGS. 3 and 4 again show the disks of FIG. 1 and 2, which are shown separately in this case.

FIG. 5 shows a closure device which consists of a number of circular chuck inserts with their disks according to FIGS. 1 and 2, which are rotatably mounted in a stirring * -shaped container. The locking device in Flg. 5 shows a section through the device in FIG. 2 along the line VV.

In the Flg. 1 and 2 shows 11 "a circular chuck insert with an axial channel 14" which can be closed by two disks 12 and 13. The disks 12 and 13 are mounted in such a way that they can be rotated about an eccentric point 15. The discs 12 and 13 of Figures 1 and 2 are within the perimeter of the chuck 11 in which one or more chucked chucks are mounted in a tube 16 shown in Fig. 5. Numeral 17 indicates the center of one Chuck insert H ₀

1 shows the position of the disks 12 and 13, ν · ηη the axial channel 14 is open. By turning the chuck insert 11 clockwise over an angle of 360 °

BATH

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Legs in the middle of 17 you get the position of the pig. 2 « By turning the chuck insert 11 in Pig. 2 counterclockwise by 17 over an angle of 360 ° is obtained the position of the Pig. I.

In Pig. FIG. 5 shows a protective wall. In the protective wall 1, there are several feeding facilities 11 with their disks 12 and 13 arranged in a tube 16 · Me tube 16 is stepped and fitted into another stepped tube 18. The tube 16 is provided with a plate 20 with a handle 21 provided with the inner RShJIt 16 and the Putterelnaätze 11 can be threatened over an angle of 360 °. The lining inserts 11 and the discs 12 and 13 are In Pig. 5 shown schematically.

Pig. 5 also shows a "coffin" 19t which is placed in front of the verf Locking device was pushed after the lock of the coffin had been removed. By turning the handle counterclockwise the shutter is opened and a The object from the coffin 19 can be introduced into the protective wall, or vice versa. Since the coffin can be pushed close to the wall 1, only a very small amount of radiation can escape from the medium inside the lock penetrate.

Advantageously, a locking cam can be made in the wall 1 009822/0076

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(not shown) to prevent the inner tube 16 is rotated further than 360 °. If it is mistakenly rotated further than 360 °, bend notes 12 and 13 and thereby cause damage ”.

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Claims (1)

16-4361 PATENT CLAIMS 1. Closure device for shielding radioactive radiation in a wall made of radiation protection material, in which at least one feed unit in a tubular container, which is designed as a passage element and passes through the entire wall, can be rotated about an axis parallel to the axis of the tubular container and the one having axial channel, characterized in that by rotating the putter insert or the chuck inserts a plurality of disks of protective material, which are movably mounted on the chuck insert, can be moved one behind the other in the axial channel, since these disks are movable about an eccentric axis of rotation, the eccentric Axis may lie in a "region" that may extend to infinity from in close proximity to the axis of the tubular container, and the disks in a plane transverse to the axial channel may have a cross-sectional area less than that Cross-sectional area of a chuck insatzes and which has such a shape that the smallest transverse dimension of the part of each disc that is in the closure pitch 009822/0076 16U361 can be pushed in front of the channel is practically the same fraction of the channel as represented by the number of disks _c 2. Yarachlußvorrichtung according to Anepruoh 1, characterized in that that the material d @ a Futtereineat & es and the slices has a specific weight about three times as high as the material of the protective wall. 3. Locking device according to Aneps'uch 2, characterized in that that a feed insert and swel Seheiben or a large number of them v © rw © adst 4-, VerBOhlufiYorrielrtu & s according to Ajss; ps? Ueh 5, dadureh marked that the material of the puttereineatsee of the discs is Bisen or @ ii & @ Eis®nlegi®ru & i, the material of the ³ Scliutswanä concrete indicates that & uß @ ieen as material of the and the discs is used. 6. Connection device according to Anepruoh 3, which is @ äeSiae% (; ia® the material dei Futtereineatses and the Disc lead or a © lead alloy is while the material iar protective wall barite concrete is " 7ο device according to one of the preceding claims / 009822/0076 ^ _{1 Al} BAD OBSßlNAL • ψ W ^ v characterized in that the axis with respect to which the disks are movable is oriented in this way is that gravity or a component of it in the plane of the discs can be used to open or close the channel by turning the putter insert ο 8. Closure device according to claim 1, characterized in that the surface plane of each disc for the most part by outlines corresponding to the shape of the circumference of the cross-sectional area of the axial channels is limited, ° 9. Closure device according to claim 1, characterized in that the discs, which are spread out like a fan, but are interconnected, in a position are to close the cross-sectional area of the axial channels 009822/0076 Blank page