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公开(公告)号：US3867253A
公开(公告)日：1975-02-18
申请号：US18718271
申请日：1971-10-06
Applicant: ATOMIC ENERGY AUTHORITY UK
Inventor： GRATTON CHARLES PETER , HOPER ALAN THOMAS , KENWARD ALAN
IPC: G21C3/04
Abstract: In a nuclear reactor employing porous fuel irregularities of coolant flow can occur through the porous fuel at different parts of the core. According to the present invention means are provided to lessen the non uniformity of coolant flow and typically sleeves with control orifices in their walls are employed to regulate the coolant flow through porous fuel tubes.
Abstract translation: 在使用多孔燃料的核反应堆中，通过核心的不同部分的多孔燃料可以发生冷却剂流动的不规则性。 根据本发明，提供了用于减少冷却剂流动的不均匀性的装置，并且通常使用其壁中的控制孔的套管来调节通过多孔燃料管的冷却剂流。
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公开(公告)号：US3838557A
公开(公告)日：1974-10-01
申请号：US39405473
申请日：1973-09-04
Applicant: MC DONNELL DOUGLAS CORP
Inventor： MC GUIRE J
Abstract: A vent structure for reliable long term operation at high temperatures is fabricated by annealing a tubing of predetermined length and size, uniformly filling a normally upper portion of the tubing with a predetermined thickness layer of fine alumina particles, flattening and doubly folding and pressing the upper portion of the tubing at predetermined pressures, annealing the formed tubing, and installing a particulate filter in the undeformed normally lower portion of the tubing. For use in venting helium generating reactor control pins located under hot molten sodium, a vent assembly including the vent structure and providing an air lock between the outer molten sodium and the vent is affixed to the upper end of each control pin.
Abstract translation: 通过对预定长度和尺寸的管材进行退火，均匀地填充管道的正常上部，用预定厚度的氧化铝细颗粒层，平坦化和双重折叠并压制上部 部分管道以预定压力退火，退火所形成的管道，以及将微粒过滤器安装在管道的未变形的正常较低部分中。 为了用于排放位于热熔融钠下方的氦发生反应器控制销，包括排气结构并在外部熔融钠和通风口之间提供气锁的排气组件固定在每个控制销的上端。
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公开(公告)号：US3801450A
公开(公告)日：1974-04-02
申请号：US3801450D
申请日：1971-12-17
Applicant: KERNFORSCHUNGSANLAGE JUELICH
Inventor： BARTHELS H , FASSBENDER J , KATSCHER W
Abstract: A fuel element for a nuclear reactor comprises a hollow structure forming a coolant path and one or more partitions intercepting the coolant flow between the inlet and the outlet, the partitions comprising perforated, aperture or porous supporting walls flanking a porous mass of coated nuclear-fuel particles.
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公开(公告)号：US3801447A
公开(公告)日：1974-04-02
申请号：US3801447D
申请日：1971-11-16
Applicant: HEENAN W
Inventor： HEENAN W
Abstract: This invention relates to a venting device for nuclear reactor control and fuel rods having fissionable material contained in a cladding, characterized by a porous disk forming part of the wall of the rod, said disk allowing the fission gases to pass therethrough and preventing the liquid sodium coolant from entering the rod.
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公开(公告)号：US3702282A
公开(公告)日：1972-11-07
申请号：US3702282D
申请日：1968-11-26
Applicant: ATOMIC ENERGY AUTHORITY UK
Inventor： GATLEY JOHN ANDREW , JACKSON GEORGE OLIVER
Abstract: A fuel pin for a fuel element of a nuclear reactor (for example of the sodium cooled fast breeder type) is of the elongate tubular type having its inner and outer sheaths sealingly secured together at one end and at the other end having first and second sealing means is spaced adjacent relationship to one another and each allowing relative longitudinal movement between the two sheaths. A duct provides a vent path to the outside of the fuel pin from the space between the two sheaths and bounded by the two sealing means. The duct is conveniently provided by a capillary tube helically coiled about the outside of the fuel pin and terminating at that end of the fuel pin which is remote from the two sealing means.
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Patent Agency Ranking
公开(公告)号：US3697377A
公开(公告)日：1972-10-10
申请号：US3697377D
申请日：1968-07-08
Applicant: COMMISSARIAT ENERGIE ATOMIQUE
Inventor： GAUTHRON MAURICE
Abstract: A VENTED FUEL ELEMENT FOR A NUCLEAR REACTOR OF THE LIQUIDMETAL COOLED TYPE IS DESIGNED TO PREVENT THE PENETRATION OF THE LIQUID METAL COOLANT INTO THE FUEL ELEMENT CAN THROUGH THE FISSION-GAS DISCHARGE VENT. THE VENT ACCORDING TO THE INVENTION COMPRISES A COMPARTMENT WHICH IS SEPARATED FROM THE CAN INTERIOR BY A FIRST POROUS PLUG AND FORM THE LIQUID METAL BY A SECOND POROUS PLUG. THE LIQUID METAL WHICH HAS PASSED THROUGH THE SECOND PLUG IS INTENDED TO TRANSPORT A POWDERED PRODUCT WHICH IS PRESENT WITHIN THE COMPARTMENT EITHER INT THE FIRST PLUG WHICH IS THEREBY RENDERED IMPERMEABLE TO THE LIQUID METAL OR IN THE DIRECTION OF THE SECOND PLUG SO AS TO BRING THE POWDERED PRODUCT INTO CONTACT WITH THE SECOND PLUG AND THUS PERMIT THE DISCHARGE OF FISSION GASES.
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公开(公告)号：US3676297A
公开(公告)日：1972-07-11
申请号：US3676297D
申请日：1968-12-09
Applicant: ATOMIC ENERGY AUTHORITY UK
Abstract: A gas cooled reactor having a core composed of a plurality of similar replaceable fuel bearing blocks of moderator material. The blocks are substantially pentagonal in cross section and assembled side by side with the flanks of one block engaging the flanks of adjacent blocks. The blocks are interlocked due to their shape such that upon removable of a block a neighboring block will not topple into the void so created. The corners of adjacent blocks are grooved to receive longitudinal members which are withdrawable to provide looseness between the flanks of adjacent blocks.
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公开(公告)号：US3607638A
公开(公告)日：1971-09-21
申请号：US3607638D
申请日：1970-04-08
Applicant: ATOMIC ENERGY COMMISSION
Inventor： SEIM ORVILLE S
IPC: G21C3/04
Abstract: A fuel element for a nuclear reactor includes a vent permitting release of gaseous fission products to the coolant during operation of the reactor while ensuring that the fuel material is sealed within the fuel element at other times. This is accomplished with a valve member such as a ball or needle of low coefficient of thermal expansion disposed within a passageway in an end cap for the fuel element which is formed of a material having a high coefficient of thermal expansion. At low temperatures the vent is sealed by the ball or needle, at high temperatures it is open so that fission gases can pass therethrough.
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公开(公告)号：US3573168A
公开(公告)日：1971-03-30
申请号：US3573168D
申请日：1968-05-02
Applicant: ATOMIC ENERGY AUTHORITY UK
Inventor： CAMPBELL RONALD HUGH
Abstract: TO ALLOW DECAY OF SOME OF THE GASEOUS FISSION PRODUCTS PRODUCED FROM NUCLEAR FUEL UNDER IRRADIATION BEFORE DISCHARGE OF SAID PRODUCTS FROM THE INTERIOR OF A NUCLEAR REACTOR FUEL ELEMENT OF THE VENTED TYPE TO THE EXTERIOR SURROUNDINGS OF THE FUEL ELEMENT, THERE IS INCLUDED WITHIN THE FUEL ELEMENT A PASSAGE-DEFINING COMPONENT SUCH AS A CAPILLARY TUBE, AN EXTERNAL SURFACE OF WHICH DEFINES AN ADDITIONAL PASSAGE IN SERIES WITH THE PASSAGE DEFINED BY THE COMPONENT, THE TWO PASSAGES TOGETHER PROVIDING A VENT PATH FOR GASEOUS FISSION PRODUCTS. ALTERNATIVELY ON THE ADDITION, TUBING IN COMMUNICATION WITH THE INTERIOR OF THE FUEL ELEMENT EXTENDS AT LEAST IN PART OVER THE EXTERNAL SURFACE OF THE FUEL ELEMENT AND PROVIDES A VENT PATH OR ADDITIONAL VENT PATH. SUCH TUBING MAY BE IN THE FORM OF A CAPILLARY TUBE COILED OVER SAID SURFACE
WHICH SERVES ALSO FOR FUEL ELEMENT SPACING AND TO IMPROVE HEAT TRANSFER TO COOLANT FLOWING OVER THE FUEL ELEMENT.-
公开(公告)号：US3459636A
公开(公告)日：1969-08-05
申请号：US3459636D
申请日：1968-07-24
Applicant: ATOMIC ENERGY COMMISSION
Inventor： GERMER JOHN H
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