DE1683463A1 - Observation window for housing with radioactive content - Google Patents

Description

1) Saint-Gobain Techniques Nouvelles, 23 vol, G. Clemenceau, GöURBEVOIE / Seine, France

2) Societe Industrielle iRIPIBX S. Α., AIlIe d »Bf fiat, LONGJUMEAU (Seine & Oise), France

"Observation window for housings with radioactive content"

The invention relates to the usual way as a window or Portholes denote devices for observing housings with radioactive content from a protected position ^ the Observer,,

The devices used for this purpose consist in the -Tegel ^AU3 a certain by number of in an enclosure wira secured by soft mechanical cohesion, and the sealing of the GQ ο au fc arrangement, plates used in G-read. From - !! - round the most simple ii-arscollung iüt cito i / i: ke αα: '-ils oneia ilas of L .; λ different composition

9038A4 / 0284 - 2 -

BATH ORIGINAL

existing panels limited. Thus, for example, in the case of a housing wall with a thickness of 1 m made of uaryt containing x5eton, four thick panels made of special glass and two thinner top glass sheets, which protect the overall arrangement on the two sides of the window, are used, with the various glass panels oeziehungsweise S ^r _o pie elglasscheiben separated by äwiachenräume of several millimeters.

As is known, a light beam, which through a transparent wedium straight through to another transparent medium, from the first month through a flat surface is separated, passes over, always by partially Reflection on the racing surface is weakened, and also hangs As is well known, the ratio of the incident to the refracted luminous flux from the ratio of the ./srte of the calculation indices in the two areas from, -, / obei the loss of light by —eflskticn at 3C, vsrinr; he is, the more uicüe ./erte lie inside each other.

Ls is known, -.i ^ sis xiaLn ^^ an ca -Uroi: = .u32iUi-iö.j3ii, .: 3.ß Ln aie - ^ infasauii ;: ^ s ocnut ^ i ^ iLatcr ¹ ; ^ lne i: _usoi ^. : ':: ^ ii ^ euracriu

9 0 9 Ö Λ Λ / 0 2 8 4

BATH ORIGINAL

•. / Iru, which as the öpie _t : elgla & scheiben or vf.neinano.er fills the separating spaces, if the ^ irechunks index aio ^ ar il assize it near outside. of the glass and jeuenx'alls. rößcr as i aer the Lurt ^ ..- üult v / ill, Can on uiesc ..oise dab hatred -er "irlcun ^ of teilv / iron Rexlelrfcionen, ui uer j.lührüahl of ^ ¹ Ii, chen, velc / ie of Aen light israhx en uurohurunren were rd-lssen, weakened '.veraen. Loss of pax'asitarian light is thus reduced and thus considerably improved by the auster.

offciiidoer dar beschrieoen ^ n Art; .- iron jeuoch e— v / i. ^ oe i \,; -. ch '■ “.; lü uui. i - urch ^ .ie ver./enaung a xüllilUüöigl-time, .ie h-.ui'i ^: ϋΐώ "indexilüssifvieit" oüseichnet ν, -ird, er-.eben üäiM scLv / ieri -O ^ Ouichtun-sprübleme . In the i'all one zuxMili en. ^ UsfHelens the liquidity, the window loses a. ^ Roien ϊοϋ leg optical sights. i''erner unv, 3rlie ^; t ^ ie ver..ond3ue liquid, in; In general, a slight ul, uxitei ^{1 of} the ./effect of the irradiation, especially in the K: 5ckbaj. "Schait the A'u seals a v / issen change and niiiuni, finally an. uie gradually celäd with verujirsinirun.-en and: ". i: idiol, -33produrJ" un, ■ .-- alcii-a see on the surface of the glass

9 0 9 8 U h I 0 2 8 4 BAD ORIGINAL

Deposit plates and thereby, the window always progresses make it more opaque. It is therefore necessary after a certain period of time to remove these deposits. If that doesn't work. Emptying the index liquidice it and replacement of the same with new index liquid the window must necessarily be dismantled in difficult and correspondingly expensive work, to allow the cleaning of its inner surfaces.

According to the invention, these disadvantages are made of a glass sheet clay of appropriate thickness and composition existing observation window avoided that certain of the glass plates from each other or from the protective ones The spaces separating mirror glass panes are filled with a transparent substance, which is liquid Torrn is introduced and then converted on the spot into a solidified state to such an extent that it is in all accidental destruction of the sealing devices cannot escape. There are several ways to get a. Liquid in place in fixjf i'orm to convict. According to a first of these. options a substance is used for this purpose which

-.5 - 909844 / 02JBf - ν, ^ _Sf

. . . '' '■ ■' BAD ORIGINAL

both 'Verw.endungsi-e.iripexa-tu-r.-aes IJ

foot is, however, by heating at; his contribution . melts. "According to another aspect, a liquid resin can be used, which is solidified by polymerisation, with the polymerisation by addition. set of a catalyst or, if the practical; opportunity is available for this purpose, can be brought about by the effect of ionizing radiation. ■ ■

The details as well as other features and advantages of the Invention emerge from. the following description of a preferred embodiment of the protective observation window that forms its object on the basis of the images «. .

. Fig. 1 is a vertical section through the observation window

Fig. 2 represents schematic ;; a TorrieJatung, .like them, for filling, the Zwisßlieliräüiiie / Z: wis, ciie%. deft llatten,

you ^ afc the _; -. I ^

BATH

The in. Iieur 1 shown ^ -ecbacfAtun. ^ Sf cr.LXer -is-composed of f _r glass plates 10, 12, 14, '16- and separates t = iß'a. active ^ ^ eIIe-- 18 by dar xfeobaciitun ^ szcjae ~ kö. _r ic, who see the workers at the cell. ülr. / ciil x ± s consisting of four - ■ plates =. ! Observation window or jiull. Eyes in general to be set in practice - hat ζ ans:, meet requirements, - is a matter of course; .... the - ^ xt home .. dung but not "on-observation window kit aieser llatten- zusamraensetzung limited In © .en beicannten ^ ^ s- ^_usführun; form of such windows is that the various ± 'eilev- ^; the window to be held together with the ala; "index. liquid "liquid filled · designated whose Zwedk it is, the intensity of the -teilweisen ^ Äeflektxon." Lightes of ⁷ -on the Srennf laugh of the various media, the soft Iiichtstrahlenbündel successively. happens _f to _: - ^; OesGhrän _: * - ',. ken * ylexm the bundle of light rays: from ₁ eiaem, mediim with the _{refractive index In 1} into another medium with your refractive. index Tue ₂ entry _? Partly aeflection of this succeeded. ben »whose ./ert- depends on whose angle of incidence on the surface of the two media and the"; he "of the, two, orechungsinai-zes, Y / enn R is the ratio of the reflected light flux. to the falling Licixt river, (the ^ V

then gives 3ieh for a right or essentially right. ^ infr

Έί =

i ^ +

On the inner surface of the air and the usually V3r .-. Ends, lasers are "Grii ;; t the fourth of the coefficient H 6.8 ._" Hir glasses of greater density and consequently greater refractive index This coefficient even achieves 10%. the Heflelctionsfcoeffizient ^ sinäßig 1 "/ hen by jedccii they air, an oil having an in-JLihe 1.4 -öreehun SINDEX sr is set at, so falls to a sett τοη größenordriun., = ao ^ and uie -durchsieliti ness of ^ eobachtungs fcnscero is therefore considerably i erbessert ^r "the Yorhandensein such a liquid inside the Beocachtungsfensters results, however, the above already enumerated Kachteile which avoided by the Jirfindunn be.

The observation windows shown in? I ~ Lir - .. 1 are the Z ^ isBhenräuaLSi ^ y / ischen-the glass plates 24 and 26 with

^ efül3-, t ^ des.sen refractive index is higher,

- 8 909844/0284 -

than that of air. This substance was introduced into these spaces in a liquid state and hardened in parts and parts. By means of a seal 28 made of a suitable material that is placed around the second plate of the observation window; this prevents the liquid from reaching the front xeil a & s le observation window during a filling process. In the enclosure radial channels 31 and = 33 recessed aie ä »in j your aer substantially planar the jobaciitunjsiensters from each other are the different glass plates of & separating interspaces, and whose ends outwardly in the lower and upper -." - "eil - The i ^ infassun; ·· open out. These channels serve to introduce the indeSCt'liquid into the interior of the enclosure and to flow through it

aera inside the window displaced air. Preferably

above the middle of the middle plate 14 is an additional one Air outlet channel 34 is provided, through its front, by hand, the formation of air pockets is prevented, if liquid passes through the two lower ones at the same time Openings 30 and 32 is inserted.

^ Xe i- ■ -V. - - ■ - ■ -.-. ■ - - Excellent results are then achieved in practice

- 9 -: ^f - · - " y 9098A4 / 028 4 ■ _; -;. ,, / '

BAD ORlGiNAL

when used as a filling. for ie & r-räuiae ces observation window a .verhältnismäßig little viscous ELüssigkeit having a viscosity of 300 to sg 15000 centipoise at a - 'emperature of 25 C which ^r by polymerization at a temperature in the IväLeder outdoor temperature ϊemperatur after addition of an appropriately selected Katal3 sators hardened, is used. This material then reaches a Shore hardness A of around 15 points. I have these characteristics

■ ■ it

several commercially available substances, for example the synthetic resins "SI 184" of the Socifete: Industrielle des Silicones .und the synthetic resin "Shodorsil 10,321" ', the Societe EhSne Poulene.

The introduction of the liquid into the interior of the jpg Beobachtun ^ sfensters done vor2U £; sv _"-? Else in the J in igur 2 illustrates lighten Weisfi. . .

Das _J fJ.üjtSig ^, _J Harz, ..- d _: em derJfefeals-sator is ^ r, wia ^ d _: iji «-inen, be ^ e ^ licihen Jehal ^ er ßS ^ poured, d _; er ^ durcli -ein oiessar.en ^ hose 40 connected to a closed pe haiter -.38 jLs t. J3er container 38 is arranged with the • ^ lower äna ^ e one der_in, the enclosure 21 de, s ^ observation jf enters ^ gulliP ^ e Xe ^ bün.cls ¹¹ '· on it yipcä der

■ —- 1Q.—

ltJur 36 -lsja-; sasi raised, iiir »a. f orvscfc ^ -exirenäes "..iif- ° stiff aer jFiüsaigkreit. in α em interior - des ^^ cbaoht.unr-s- '. x'ensters zu «e.virken · This turns out to be a Jindaruck-.von about 3OG g / cm as appropriate

To the inö'.fliensi; favorable ^ Xsceünisze des vors-.te2ienä _: "i'Ußd- -s-ätzlich oeüclirieoeneri Verx" ahrens zum 5 ¹ UlIsn - * ii '^ eobach- tungsienster. To achieve this, it is advisable to take a number of precautionary measures, aiä._niiiis: or should be described. . - ■

Gate to the xüllen ues; _ieobachtu.n2; Si.ezxsxers iiit uis Inaexiiarz it is advisable to remove the inner walls of the 3pi ^ galr: lassciiei- ben or G-lasplstten very carefully. Then one or more fabrics become one or more of the substances that tend to be tied, which is made up of a corresponding JjössingspiittelV: such as -Hexan or Λρ-eton ^ i üilan. b ^ p ^ go ^ _iEann; , a ^ fge1 ^ aj.en. Wear the isif

BATH ORIGINAL

unt aas prisiiirea ii & iiJHixxels would be the cause of cpti- schan -ühl- ^ rn . .uas .äin υ struggle with the first Ii ^ J. "t layer kaira after- the processes _{illustrated in 2i:} ur 2 -3rföl, c'ii. The emptying of the material that forms them cri'ol-t with a fixed constant O die iron c-.er i. "'lv.c? ii ~ i-jkeit aes ven / enäeten ^

r-bhae ;; t. Ear αορρβίΐ-β curtain 'of filling and JSntlserens (las Innsnri »unes a-as ^ ecbacttun ^ sferiafceVs is preferably repeated several times wiecerl-oüi, whereby- with aeai the first time the photo iüs irensters _: opriif" b \ rivC and ot ^ je removed warcien, which etvv-a at a rionage of the window are accidentally encased in the d-avas .

Preferably v, ± ca aia - usually in the ring-shaped 2v; x3chen spaces 4 ", 46 and 48 provided packing of J3leivv'ülle aurcli pollen or lamellae from massive lead - replaces, which are.; Eri? I .-: real dimensions -that. -tive to hold back the. air during the ^ ollun., c.er iäinfasstm ^ through the E? .rs. By aie ^ ersrt reserved susälisliche, disguise the J-efs-.hr aines Austre -tens of gases after the tüllüng ■ verhini.sr ^, since the thereby ireivierdende gas bubbles

-der i'ol; aarization of the iiaraes f3st-

- 12 -

laid-be "This liechteil can also be eliminated by the fact that all the interstices between the glass plates in 'the immediate Nachbarschaft.dieser interstices by directions, uie vile 48 and 50 designated to be completed. In this case, the filling of each of the spaces thus delimited takes place in an independent manner, either consecutively or simultaneously.

To ensure the best possible transparency of the resin layers. to ensure, it is expedient to use the ^ ulliquid allow a vacuum of 400 to 500 mm QS to take effect beforehand for the purpose of ■ degassing the same.

To ensure a proper .i'üllen. To achieve empty spaces and in particular any unevenness without the risk of the formation of air inclusions, it is advisable to use a substance for this purpose whose. viscosity in the liquid state .600 to 300.0 - 0entipoises. amounts to. The lower the viscosity is. all the more, the more will be the risk of such occurrence. Difficulties. In general _: possession: j. _; edQ: ch-die po, lymerisie "a? ba; ren _: fabrics .relatively high viscosity, therefore: it is also possible and useful"

9,99844 / 0284; ·, Ν

■ .- ■ ■■ - ■■ ... ■■ '. '^ AD ORIGINAL

the initial resin by dilution with a liquid of lower viscosity, which is obsxoc not polymerizable, but with the ilarz mi se Ht and later a homogeneous one Solid forms, to liquefy «To this 2v / corner can for example, liquid silicones can be used.

- Also other substances, both in solid and in liquid Condition are particularly those that are at Hormary temperature feet are and at a sufficiently low Melt at temperature and into the interior of the observation festival be introduced in the molten state, such as for example paraffins can be used.

Gels, as they can be produced by adding a gelling substance to an oil, are also suitable. Then 4 g of 1 aluminum stearate are added to a slightly warmed paraffin oil. By cooling, ^- eht this liquid quickly into a solid body of low hardness, which is coherently contained and transparent about. This gel liquefies again at a relatively low temperature. Plague bodies of this kind have the advantage that they can be converted into

909844/0284

the liquid state, if a & .s is required, easily from the. observation window cairch drainage: removed v / ground can »^ aIIs see in the i'lüs silica it or on aen surfaces If the glass plates show faults, this product is then liquefied by gentle heating and then removed The observation window can be removed without ate a time consuming and gradual dismantling of the IPenster required is. To do this work, you need to know about the edging of the window, in particular the boundaries of the interim spaces Heating elements enclosed between the plates, arranged as heating tubes 52 or electrical resistors through whose effect the product is carried through in the first pail Passing a warm liquid through the pipes in the second lalle can be liquefied by resistance electrical heating.

Furthermore, if by the effect of radiation, polyflerisable liquid resins are used, lines 52 are provided for the passage of radioactive Izeaiums

will.. .

Bat claims ; ;

909844/0284, - 15 -

Claims (1)

1. Jfe-Ufc uui-cfr --Z-viXBoh.siJ.räiaae vca eini-en Iilillimeters ,. uie council. ■ JIner-bt'-Oii "_ ^! With a * ^ xjh & rcia _; r 3 chunks index than that of Lux ' t i ^ i'üllü iiina, separated from each other by glass plate uett be ~ 3-jerieudöS inserted in the wall of an oehutzgeiiäuses x enster zur ^> ücbacliti2n £; sines in des -ieiiause located r? aioactive otofx'es, aaaurch. ^ ekc-nnzeiclanot, aass di- Zwi— 3cl.3ur {.lU! ne α er Jr-Ia-1; th with a substance;, s are filled, eggs from the liquid-in which varies ν igte i / hase uberfüliroar is and J.er in asr liquid irliese - incorporated into the interstices and absorbed in them. ". , -. 3xenster according to claim 1, aa.v.urch; _ .; ekennzeic3inet ,. among other things outside in liquid: Sustänäe introduced in the intermediate rooms unu in uiesen verfesti ^ Xe ötcff an aurob. by addition Oilicon resin produced by a catalyst brings about polarization is-. .-., - ■ '5 · Observation azenster naelt Ansprueii 1, marked daaurcii, •' ate the liquid filled in the wisejaenräuine, in us "verXestigiie substance" is an extremely poor, scintillating plastic or a substance with analogous six digits Cooling is solidified. .- 16 - BATH '4. That the introduced in liquid state into the gaps and solidified in this substance liquid ■ resin i ₌ st that which -after its introduction into the interstices of subjecting the resin observation window according to claim 1, characterized in that a through by ionizing radiation, kK ± is cured, effected polymerization. 5. Observation window according to claim 1, characterized in that the substance introduced into the interstices in the liquid state and solidified therein is a gel formed by adding a gelling agent, such as aluminum stearate to a paraffin ¹ ! 6 .. observation window according to one or more of the claims 1 "to 5, characterized in that in the walls an enclosure surrounding this in its lower part Part of essentially vertical channels are recessed, which open in the vicinity of two adjacent glass plates separating the spaces ».; , - -, .-.; .-. .. ■ -. .... "-.", - 17 - 7. Observation window according to one or more of the claims 1 to 6, characterized, that the upper wall the edging is penetrated by essentially tertiary canals, the lower end of which is in the vicinity of the two mutually adjacent glass plates opens into a space separating one another,. , - ^ p 8. Observation window according to one or more of the speeches 1 to 7, characterized in that the upper rope Mount in the vicinity of the middle! "Noble of the observation window or each of the glass plates forming this vertical air outlet ducts are formed. 9. Observation window according to one or more of the claims 1 to 8, characterized by turning to the glass plates around A parent seals which prevent the leakage of the interstices filling substance from the interstices of the glass plates. 10. Method of manufacturing observation window jain housings, which include a radioactive source of radiation, according to one or more of claims 1 to 9, characterized characterized in that at least one part of the 9098 4 4/02 8 4 BATH the glass plates forming the observation window "from each other A substance in a liquid state is poured into the separating interstices, which after its ^ intringen in the iiaum enclosed by the frame of the window in the State of extreme hardship passes. ο Method according to Claim 10, characterized in that the liquid in the from, its εαιβ filling spaces through in the lower part of the frame of the observation window arranged! pipelines, preferably one for each of the Pipeline arranged between the discs is introduced, to which the! liquid from a dense Container is fed, in turn by an in its lower part opening line sit under an adjustable Pressurized liquid is fed. · 12. The method according to claim 1G and 11, characterized in that dai3 in the raile of the use of through the effect of a Catalyst polymerizable silicone resin before the resin his introduction to the observation window of action is subjected to a negative pressure. 13 · Method according to claim 11 and 12, characterized in that 909844/0284 i BADORLGiNAL that the surfaces within the observation window before the introduction of the solidified body forming 1 ' ¹ IUssi ^ ity .with a! primary adhesive coated v / ground. 14. "The method according to claim 11» characterized in that ■ using a liquid through polymerization taking the generation of ionizing radiation curable Hax'zes the! Liquid after inserting it into the interstices einor such ö ireLlunp; is suspended " 15. The method according to one or more of claims 11 to 14, characterized by uaß in the window before the introduction the Sien solidifying substance used a device which makes it possible, from the outside, to the hardened To heat the fabric back to the heating temperature. 16. λ? "Learn nech claim 15» characterized in that the in the edging of the window before bringing in the self devices used to solidify the substance are preferred around the boundaries of the spaces between Lines extending from the glass plates are,,, through; Which a heating medium or a radioactive otoff passed through it will. 9 ^ 4 ^ / 0 2 ^ 4. · ■ ;. ^OAD L e r s e i t e