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US5084234A Expired / Lapsed US ⏱️ 0.0 years remaining

Absorption casing for a source of radioactive radiation, particularly for a nuclear reactor

Assignee: Individual
•
Filing: 1989-12-21
•
Granted: 1992-01-28
•
Expires: 2009-12-21
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Abstract

Abstract The absorption casing for the absorbing of radioactive radiation and fission products comprises four layers of different materials which retain the various kinds of radiation and the gaseous fission products. The first layer (36) consists of lead and absorbs the hard gamma radiation. The second layer (38) serves for the absorption of neutron radiation and consists of boron, hafnium, cadmium or beryllium. A third layer (42), consisting of aluminium, is provided for absorbing the alpha and beta radiation. Gaseous fission products are retained by a fourth layer (44) consisting of a zirconium alloy. The absorption casing provided with these layers is used for absorbing the radioactive radiation and for retaining the radioactive substances of the reactor of a nuclear power plant. In fast breeding reactors, a fifth layer (32), consisting of titanium, is used as an additional absorptive layer for absorbing the radioactive radiation issuing from the plutonium.

Inventors

  • 👤 Karlheinz Hosgen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 15:21
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/12; G21F1/125; G21C; G21C11/00; G21C11/02; Y; Y02; Y02E; Y02E30/00; Y02E30/30

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 150 words
An absorption casing for a source of radioactive radiation comprising a first layer (36) having means for absorbing gamma radiation, a second layer (38) having means for absorbing neutron radiation, a third layer (42) having means for absorbing alpha and beta radiation, a fourth layer (44) having gas-impermeable means for enclosing a source of radioactive radiation and for retaining gaseous fission products, said first through fourth layers being disposed in consecutive adjacent relationship to each other, all said first through fourth layers (36, 38, 42 and 44) being spaced from each other and surrounding a source of radioactive radiation with said fourth layer (44) being the layer closest to said source, said fourth layer (44) being zirconium or a zirconium alloy, and a layer (34, 40, 46, 48) of an elastic material being arranged between each pair of spaced adjacent layer (32, 36, 38, 42, 44) of said absorption casing.
Claim 2
Dependent Claim 150 words
An absorption casing for a source of radioactive radiation comprising a first layer (36) having means for absorbing gamma radiation, a second layer (38) having means for absorbing neutron radiation, a third layer (42) having means for absorbing alpha and beta radiation, a fourth layer (44) having gas-impermeable means for enclosing a source of radioactive radiation and for retaining gaseous fission products, said first through fourth layers being disposed in consecutive adjacent relationship to each other, all said first through fourth layers (36, 38, 42 and 44) being spaced from each other and surrounding a source of radioactive radiation with said fourth layer (44) being the layer closest to said source, said fourth layer (44) being zirconium or a zirconium alloy, and a layer (34, 40, 46, 48) of an elastic material being arranged between each pair of spaced adjacent layer (32, 36, 38, 42, 44) of said absorption casing.
Claim 3
Dependent Claim 15 words
The absorption casing as defined in claim 1 wherein the second layer (38) comprises hafnium.
Claim 4
Dependent Claim 16 words
The absorption casing as defined in claim 1 including a fifth layer (32) comprised of titanium.

References Cited (Backward Citations)

US2961415A Cited
US3080308A Cited
US4192714A Cited
US3732427A Cited
GB1396705A Cited
US4011132A Cited
US4090083A Cited
US4261794A Cited
US4735768A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-01-27 1995-07-29 1996-01-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-01-27 1999-07-29 2000-01-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-01-27 2003-07-29 2004-01-28 $7700.00 Window Closed / Lapsed

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