EP0903756B1 - Vorrichtung zum Abschirmen einer Fluid-Wanddurchführung gegen hochenergetische elektromagnetische Strahlung, Kernstrahlung oder Korpuskularstrahlung - Google Patents
Vorrichtung zum Abschirmen einer Fluid-Wanddurchführung gegen hochenergetische elektromagnetische Strahlung, Kernstrahlung oder Korpuskularstrahlung Download PDFInfo
- Publication number
- EP0903756B1 EP0903756B1 EP98115752A EP98115752A EP0903756B1 EP 0903756 B1 EP0903756 B1 EP 0903756B1 EP 98115752 A EP98115752 A EP 98115752A EP 98115752 A EP98115752 A EP 98115752A EP 0903756 B1 EP0903756 B1 EP 0903756B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shielding
- radiation
- helix
- shielding elements
- wall passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005855 radiation Effects 0.000 title claims description 26
- 239000012530 fluid Substances 0.000 title claims description 7
- 230000005670 electromagnetic radiation Effects 0.000 title claims description 3
- 238000012216 screening Methods 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000004698 Polyethylene Substances 0.000 claims description 11
- 229920000573 polyethylene Polymers 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- -1 polyethylene Polymers 0.000 claims description 3
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims 2
- 229910000712 Boron steel Inorganic materials 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000000979 retarding effect Effects 0.000 claims 1
- 238000009423 ventilation Methods 0.000 description 8
- 239000002915 spent fuel radioactive waste Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241000237858 Gastropoda Species 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010006 flight Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F7/00—Shielded cells or rooms
- G21F7/005—Shielded passages through walls; Locks; Transferring devices between rooms
- G21F7/01—Transferring by fluidic means
Definitions
- the invention relates to a device according to the preamble of claim 1.
- the after-treatment of spent fuel elements happens among other things in so-called "hot cells", i.e. in sections of nuclear facilities that are against after external neutron and gamma radiation shielded are.
- hot cells are usually located Machines for the aftertreatment of the fuel elements and lighting devices.
- the generated in the hot cells Heat and the residual heat of the spent fuel must be through appropriate ventilation wall bushings be discharged to the outside.
- the walls of the hot cell typically have one Thickness of 150 cm and consist of concrete or reinforced concrete.
- the Systems for ventilation of the hot cells are typically located outside the hot cells themselves.
- the implementation has also been straight and led through the walls without kinks.
- the implementations typically have a diameter of 50 to 75 cm.
- shielding screws in the bushings (DATABASE WPI Section C, Week 8446; Derwent Publications Ltd., London, GB; XP002083772; AN 84-285492; Class K07; & JP.A. 59 176700 A (JGC CORP), Oct 6, 1984).
- the Shield screws consist of e.g. Iron and wise several Turns over the length of the lead-in. they are able to absorb gamma radiation.
- a rough measure of the absorption cross section for gamma radiation is the density of the material used for shielding.
- the concrete used has a density in the range of 2.35 g / cm 3 . If iron with a density of about 7.8 g / cm 3 is used, the screw flights must fill about a third of the space for the passage. The thickness of the screw threads and the pitch or the number of turns in the bushing are selected accordingly.
- the PE blocks take up a lot of additional space. Further the iron screws weigh up to 2 tons. Corresponding their manufacture, transport and assembly are complex.
- Overlapping shielding elements are in the DD 242 576 A1. However, there are some few shielding elements, which only a very small proportion occupy the space of the wall duct and on the inner wall attached to a media-carrying tubular enclosure are. The shielding effect is very limited.
- the object of the invention is the shielding device according to the preamble of claim 1 with respect their space requirements as well as their manufacture and assembly improve.
- the generic device the features in the characterizing part of the claim 1 on.
- the shielding device according to the invention is modular individual shielding elements. So it can various individual parts, in a simple manner transported and installed and also at a later date can be easily changed.
- the material of the individual shielding elements can be the requirements of the desired shielding characteristic to get voted.
- the invention is primarily intended and preferred is suitable, individual shielding elements will be used Materials form the individual components of the radiation absorb optimally. From the common arrangement of the different Shielding elements then total desired shielding characteristics.
- the individual shielding elements can in turn be made of different materials be composed. Combinations of both types of Shielding elements are equally possible. So it can any combination of suitable for absorption Materials are used. That way you can the costs for the shielding materials and thus for the Shielding device can be optimized.
- a shielding device the shape of which is thus obtained that comes very close to the iron screws.
- the slope of the Shield screw can be changed.
- fluid throughput and shielding be optimally coordinated.
- the Uniformly designed screw segments are manufacturing technology particularly cheap.
- the ventilation ducts are approximately 150 cm thick reinforced concrete walls of the hot cells. They have a diameter of 50 to 75 cm and run straight.
- Adequate must be provided for optimal shielding Amount of radiation absorbing material in the ventilation wall bushings be arranged. On the other hand, should the flow resistance for the air as low as possible be, so that an air cooling of the hot cells with possible low energy consumption is possible.
- the one Wall bushing 1 has arranged shielding device overall a helical shape. This minimizes the Flow resistance for the air flowing through.
- the shielding device is made of individual disc-shaped shielding elements 2 and 3, which is the shape of Have screw segments.
- the shielding elements 2 exist made of iron to absorb gamma radiation and the shielding elements 3 made of polyethylene (PE) to thermalize neutrons and absorb.
- PE polyethylene
- the individual shielding elements 2 and 3 are on one central axis 4 of the wall bushing arranged one behind the other.
- 2 to 4 are possible shapes by way of example of the screw segments shown.
- the shape of the screw segments is by no means based on the examples shown according to the 2 to 4 limited.
- the screw segments always have a central hub 5, so that they are placed centrally on axis 4 can.
- the shielding elements are made of more absorbent Material made, so their area can be correspondingly smaller chosen and thus the flow resistance for the air due of the larger free cross section can be reduced.
- the number of turns that the helical shielding device has should have, however, is thereby limited below that even one under a very unfavorable, oblique angle through the wall duct 1 running gamma quantum or neutron mandatory adequate shielding must experience. Furthermore, the shielding characteristic must be above the Cross section of bushing 1 be even.
- the shielding elements are chamfered at their edges, so that the shielding device is overall a smooth, step-free Has surface.
- the mass of the Screw stay the same to avoid the shielding effect Reduce.
- the individual Screw segments on one side with a projection and on the other side with a complementary recess be provided.
- Projection and recess are like this arranged that when the screw segments are placed one behind the other and inserting the protrusions into the recesses the given angular misalignment of neighboring screw segments between the individual screw segments. A later one Then change the screw pitch more difficult.
- the straight wall duct does not have to be in go all the way through the wall.
- Conceivable are, for example, two outgoing from both sides of the wall Tubes that extend to the middle of the wall and are offset from each other, with a tube parallel to the wall makes the necessary connection.
- the assembly of the shielding device can, as with a cast snail, done at the factory. It is more advantageous to assemble the device on site, if necessary directly inside the wall bushing.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Particle Accelerators (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Description
- Fig. 1
- eine axiale Schnittansicht einer Wanddurchführung mit einer erfindungsgemäßen Abschirmvorrichtung;
- Fig. 2
- ein zweiblättriges Schraubensegment;
- Fig. 3
- ein dreiblättriges Schraubensegment;
- Fig. 4
- ein vierblättriges Schraubensegment.
Claims (4)
- Vorrichtung zum Abschirmen einer Fluid-Wanddurchführung gegen hochenergetische elektromagnetische Strahlung, Kernstrahlung oder Korpuskularstrahlung, mit einer Mehrzahl von scheibenförmigen Abschirmelementen (2,3), die in der Fluid-Wanddurchführung (1) räumlich derart angeordnet sind, daß sie die Strahlung auffangen, während die Wanddurchführung für das Fluid durchlässig bleibt; wobei
jedes Abschirmelement (2,3) mindestens ein für jedes Abschirmelement einzeln zu wählendes, die Strahlung absorbierendes Material aufweist,
Anzahl und Form der Abschirmelemente so gewählt sind, daß sich eine gewünschte Abschirmcharakteristik für die Strahlung in der Wanddurchführung (1) ergibt, und
die Abschirmelemente (2,3) jeweils um einen vorgegebenen Winkel gegeneinander versetzt in der Wanddurchführung (1) hintereinander angeordnet sind,
dadurch gekennzeichnet, daß die scheibenförmigen Abschirmelemente (2,3) als achsensenkrechte Schraubensegmente ausgebildet sind und
daß die Schraubensegmente zur Bildung einer Abschirmschraube auf eine zentrale Achse (4) aufgesteckt sind. - Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens ein Teil der Abschirmelemente Eisen, Borstahl oder Blei zum Absorbieren von Gamma-Strahlung sowie Polyethylen (PE), vorzugsweise boriertes PE, zum Abbremsen hochenergetischer Neutronen aufweist.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schraubensegmente mehrblättrig ausgebildet sind.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Kanten der Schraubensegmente in Schraubengangrichtung angeschrägt sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19740817 | 1997-09-17 | ||
| DE19740817A DE19740817A1 (de) | 1997-09-17 | 1997-09-17 | Vorrichtung zum Abschirmen einer Fluid-Wanddurchführung gegen hochenergetische elektromagnetische Strahlung, Kernstrahlung oder Korpuskularstrahlung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0903756A1 EP0903756A1 (de) | 1999-03-24 |
| EP0903756B1 true EP0903756B1 (de) | 2003-05-07 |
Family
ID=7842591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98115752A Expired - Lifetime EP0903756B1 (de) | 1997-09-17 | 1998-08-21 | Vorrichtung zum Abschirmen einer Fluid-Wanddurchführung gegen hochenergetische elektromagnetische Strahlung, Kernstrahlung oder Korpuskularstrahlung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0903756B1 (de) |
| DE (2) | DE19740817A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3063812B1 (fr) * | 2017-03-08 | 2021-06-18 | Bouygues Construction Services Nucleaires | Dispositif d'ecran aux rayonnements ionisants |
| CN115410737B (zh) * | 2022-08-23 | 2026-02-10 | 中国核电工程有限公司 | 一种变截面屏蔽装置以及核设施屏蔽系统 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59176700A (ja) * | 1983-03-28 | 1984-10-06 | 日揮株式会社 | 放射線漏洩防止装置 |
| DD226115A1 (de) * | 1984-07-02 | 1985-08-14 | Buchwitz Otto Starkstrom | Vorrichtung zur strahlungsabschirmung fuer durchfuehrungen in strahlenschutzwaenden |
| DD242576A1 (de) * | 1985-11-15 | 1987-02-04 | Bergmann Borsig Veb | Durchfuehrungen in strahlungsabschirmungen mit integrierter abschirmwirkung |
| DE3707586A1 (de) * | 1986-03-13 | 1987-11-12 | Zahnradfabrik Friedrichshafen | Einrichtung zum bestrahlen von fluessigkeiten mit radioaktiven strahlen |
| JPS62274300A (ja) * | 1986-05-23 | 1987-11-28 | 株式会社日立製作所 | 放射線遮蔽ダクト |
| JPH0785117B2 (ja) * | 1987-03-30 | 1995-09-13 | 運輸省船舶技術研究所長 | 放射線遮蔽壁における一回屈曲ダクト孔周囲の構造 |
| JPH04270997A (ja) * | 1991-02-27 | 1992-09-28 | Kousokuro Eng Kk | 放射線遮蔽壁の貫通部の構造 |
| JP3275581B2 (ja) * | 1994-10-26 | 2002-04-15 | 日立プラント建設株式会社 | 放射線・中性子遮蔽換気ダクト |
| DE69713304T2 (de) * | 1996-03-12 | 2003-01-30 | Ebara Corp., Tokio/Tokyo | Abschirmvorrichtung für röntgen oder gammastrahlen |
-
1997
- 1997-09-17 DE DE19740817A patent/DE19740817A1/de not_active Withdrawn
-
1998
- 1998-08-21 DE DE59808236T patent/DE59808236D1/de not_active Expired - Lifetime
- 1998-08-21 EP EP98115752A patent/EP0903756B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0903756A1 (de) | 1999-03-24 |
| DE59808236D1 (de) | 2003-06-12 |
| DE19740817A1 (de) | 1999-03-25 |
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