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1. 发明专利

JPH07191180A IMPROVED TYPE AIR LOCK SYSTEM 失效
公开(公告)号：JPH07191180A
公开(公告)日：1995-07-28
申请号：JP19848894
申请日：1994-08-23
申请人： BRITISH NUCLEAR FUELS PLC
发明人： EIDORIAN CHIYAARUZU HATSUCHING , JIYON GURIMUSU , KEBIN SHIYOO
IPC分类号： G21C13/02 , G21F7/005
摘要： PURPOSE: To ensure transferring of articles such as drums or storage containers into a nuclear reactor storage container region without leakage of air therefrom. CONSTITUTION: In an air lock system for transferring drums 1 containing a radioactive material to the inside of a nuclear reactor storage container region 3, a passage 4 has an intermediate region 11 whose sectional area is narrower than that of an inlet end or outlet end. The passage 4 has an inlet region 10 converging and being communicated with the intermediate region 11 and an outlet region 12 being gradually widened forward and being communicated from the region 11. The passage 4 functions as like a venturi tube and air flows toward the storage container along the passage 4, and the air is prevented from leaking therefrom. A roller conveyor 20 conveys the articles 1 in this air lock system while a detector 19 monitors the air in the passage 4.

2. 发明专利

JPH07151712A PLUTONIUM ANALYSIS 失效
公开(公告)号：JPH07151712A
公开(公告)日：1995-06-16
申请号：JP18946494
申请日：1994-08-11
申请人： BRITISH NUCLEAR FUELS PLC
发明人： DEIBITSUDO JIYON TOONREI , KURISUTOFUAA HENRII OORU , KURISUTEIINU AN BAANETSUTO
IPC分类号： G01N23/221 , G01N23/207
摘要： PURPOSE: To eliminate a problem of excessive evaluation caused by existence of F by determining a mass ratio of Pu in PuF4 to total Pu content in material containing F by using high resolution γ-ray spectroscopy. CONSTITUTION: A sample 1 containing PuF4 is placed on a Ge crystal axis before a high purity Ge detector 2. A lead collimator 3 is provided on the detector 2, and a thin Cd shield 4 is installed before that. A high voltage power source 5 and a preamplifier power source 6 are connected to the detector 2. An output signal from the detector 2 is transmitted through a spectroamplifier 7 and an A/D converter 8 to a personal computer and a multi-channel analyzer 9. A γ-spectrum of radiation emitted by the sample 1 is collected by the device 9. A relational net photoelectric peak count is determined based on the γ-spectrum by the device 9, and Pu and Am isotope composition is determined using that. A mass ratio of PuF4 to total Pu content is thus determined by a specified program based on this information.

3. 发明专利

JPH06300528A OPTICAL MEASUREMENT SYSTEM 失效
公开(公告)号：JPH06300528A
公开(公告)日：1994-10-28
申请号：JP6799194
申请日：1994-03-11
申请人： BRITISH NUCLEAR FUELS PLC
发明人： ERISU MAATEIN DEIIN
IPC分类号： G01B11/02 , G06T7/60 , G21C17/06
摘要： PURPOSE: To establish a non-inserted type indirect measurement system for a spent fuel by making a calculation using a known weight value per unit fuel material length and the measurement value of fuel rod length. CONSTITUTION: A spent fuel rod as a measurement object is placed on a support plane forming a part of a measurement tray provided within the visual field of a camera 4. Light for observing an operation in a fuel element unsheathing cave and illuminating the measurement ray is emitted from a plurality of high pressure sodium lamps mounted on a cave wall. The position, visual field. contrast and focal point of the camera 4 are adjusted by use of a control unit 7 installed at a distance. The images of the camera 4 are digitally stored in a computer 8, and information regarding measurement results for determining fuel rod length, as well as information regarding a defect and an event is stored in the hard disk of the computer 8. in addition, the weight of a fuel rod is calculated from the measured fuel rod length and a preliminarily obtained known weight value per fuel material unit length.

4. 发明专利

JPH06135674A HOISTING APPARATUS 失效
公开(公告)号：JPH06135674A
公开(公告)日：1994-05-17
申请号：JP7760793
申请日：1993-03-11
申请人： BRITISH NUCLEAR FUELS PLC
发明人： RICHIYAADO JIYON KIYAPUSUTEITS , DEYUUI UIN DEIBIIZU , DEIBITSUDO JIYON SUTATSUBUSU
IPC分类号： B66C1/28 , B66C1/34 , B66C1/66 , G21F5/14
摘要： PURPOSE: To provide a winder device which engages with a trunnion or similar member of an object to be lifted. CONSTITUTION: A beam comprising at least two substantially rigid suspension members 14 wherein at least one open slot 38 is provided at each lower end so as to down on each trunnion, and detachable members 44 for bridging the open slots 38 below the trunnion, are provided. Here the detachable member 44 engages with the open slot 38 to support the trunnion when the beam is wound up. Thus, since the device is relatively rigid, an operation for attaching/ detaching an object to be lifted to the suspension member is done by a single operator.

5. 发明专利

JPH0643280A NUCLEAR REACTOR CONTAINER STRUCTURE 失效
公开(公告)号：JPH0643280A
公开(公告)日：1994-02-18
申请号：JP14441592
申请日：1992-06-04
申请人： BRITISH NUCLEAR FUELS PLC
发明人： BURUUSU HARII SAARERU , RESURII DENHORUMU , JIYON EDOGAA INKESUTAA
IPC分类号： G21C13/00 , G21C13/093 , G21C19/07 , G21D1/00
摘要： PURPOSE: To obtain a reactor container structure in which the thermal and vibratory movement can be dealt with effectively by forming a curved soft corner, so that a linear can move with respect to the concrete wall and the floor, thereby moving the liner effectively onto the concrete. CONSTITUTION: A fixed lattice is fixed by casting to the concrete floor 2 and the wall 3 of a cooling water tank 1. T-bars 4 in the lattice are arranged, while being spaced apart by a distance equal to the dimensions of each stainless steel liner sheet 5. The sheets 5 cut into specific dimensions are temporarily fixed to the lattices on the floor 2 and the wall 3, such that the gap between it and the adjacent sheet 5 is aligned with the center of each bar 4. The sheet 5 is then welded to the bar 4 through a welding material 6, and the sheet 5 is melted together to fill the gap, thus completing a buried liner. The sheet 5 is moved under a vibratory thermal load conditions and the linear is moved by a constant amount, except a stress dispersed to the liner is transmitted through a bar 4 to the concrete. Consequently, a soft corner 7 can be formed of a curved stainless steel sheet 8, smoothly connecting the floor 2, the wall 3 and the sheet 5.

6. 发明专利

JPH0627296A QUANTITY ADJUSTING SYSTEM 失效
公开(公告)号：JPH0627296A
公开(公告)日：1994-02-04
申请号：JP4858193
申请日：1993-02-15
申请人： BRITISH NUCLEAR FUELS PLC
发明人： SUTEIIBUN NIKORASU SHIERII
IPC分类号： G21C19/46 , G21C19/36 , G21F9/28 , G21F9/36
摘要： PURPOSE: To effectively utilize a space in a drum by providing an inclined screen, a pan, an ultrasonic probe, a buffering chamber, a rocking trough and a means for feeding into a storage facility, for adjusting a ratio between an attachment and a hull. CONSTITUTION: An inclined screen 12 comprises a parallel array comprising a plurality of bars 14. An attachment 20 has a size of mutual interval of a bar 14, to be dropped into an inclination-allowed trough 26. A deflecting shoot 28 guides the attachment 20 as far as an inclination-allowed trough 30. Then it is released into a transmission chute 32, and then into a drum 34. A hull 22 falls from between the bars 14 into a hopper 40. Then, it is discharged through a maintenance cut-off valve 41 in a discharge chute 44. An ultrasonic wave probes 54a and 54b detects filling level of the attachment 20 and the hull 22 within the dram 34. A capacitance probe 56 monitors the drum 34 for excessive filling. Ultrasonic probes 58a and 58b monitor filling level of the hull 22.

7. 发明专利

JPH05188194A CONTAINER FOR NUCLEAR FUEL 失效
公开(公告)号：JPH05188194A
公开(公告)日：1993-07-30
申请号：JP19113492
申请日：1992-07-17
申请人： BRITISH NUCLEAR FUELS PLC
发明人： HARII MASHIYUUZU
IPC分类号： G21F5/008 , G21F5/10 , G21F5/12
摘要： PURPOSE: To obtain a nuclear fuel vessel for housing a used nuclear fuel assembly. CONSTITUTION: A nuclear fuel vessel 10 has a number of cells 16a-16c for housing nuclear fuel. The cells 16a-16c have detachable covers 18a, 18c, and are successively disposed in parallel continuous relation. Vent devices 26a, 26b are provided between adjacent cells 16a, 16c, and an inflow device 34 for introducing compressed gas to the first cell 16a is set in the first cell 16a. Fluid can be drained from its cell 16c by a valve 38 in the final cell 16c.

8. 发明专利

JPH04261079A IMPROVEMENT IN LASER 失效
公开(公告)号：JPH04261079A
公开(公告)日：1992-09-17
申请号：JP20961191
申请日：1991-08-21
申请人： BRITISH NUCLEAR FUELS PLC
发明人： JIYON HORUTO
IPC分类号： H01S3/03 , H01S3/227
摘要： PURPOSE: To output stabilized light by a method wherein copper loads are arranged in ceramic crucibles spaced apart along the length of a discharge tube. CONSTITUTION: A fire-proof ceramic tube 1 has an electrode 2 on both ends, and it is connected to a power source 3 which gives affection to high frequency pulse discharge. Ceramic crucibles 4 are separated along the length of the tube 1. The ceramic crucibles 4 contain a copper metal 5. As a result, the base of the crucibles 4 can be bent in alignment with the bending of the ceramic tube 1. The ceramic tube 1 is positioned in an insulating jacket 6. The heat generated by the electric discharge between the electrodes heats up the crucibles, copper metal in the crucibles 4 is fused, evaporated and the laser begins to work.

9. 发明专利

JPH04233778A METHOD AND DEVICE FOR EVALUATING LASER TEMPERATURE 失效
公开(公告)号：JPH04233778A
公开(公告)日：1992-08-21
申请号：JP20961091
申请日：1991-08-21
申请人： BRITISH NUCLEAR FUELS PLC
发明人： JIYON HORUTO
IPC分类号： H01S3/00 , H01S3/03 , H01S3/227
摘要： PURPOSE: To provide a method and an apparatus for evaluating the laser temperature based on the ratio of lights. CONSTITUTION: Working temperature of a laser can be evaluated by determining the ratio of lights of different wavelength generated from the laser. For example, a copper vapor laser emits green and yellow lights of different wavelength. These wavelengths depend on the temperature. The ratio of green light to yellow light is preferably in the region of 2:1 under optimal operating conditions. The ratio is determined using green and yellow filters 3, 4 having light dependent resistors 6, 7 forming input and feedback resistors in an amplifier circuit 9.

10. 发明专利

JPH02283615A REMOVAL OF THORIUM FROM RAFFINATE 失效
公开(公告)号：JPH02283615A
公开(公告)日：1990-11-21
申请号：JP4711590
申请日：1990-02-27
申请人： BRITISH NUCLEAR FUELS PLC
发明人： HARII EKURUZU , JIEFURII MAIKERU GATSUDO
IPC分类号： C01F15/00 , C02F1/28 , C02F3/34 , C22B60/02 , G21F9/18

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