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1. 发明专利

JPH05315128A SUPERCONDUCTING APPARATUS 失效
公开(公告)号：JPH05315128A
公开(公告)日：1993-11-26
申请号：JP12174992
申请日：1992-05-14
申请人： HITACHI LTD , JAPAN ATOMIC ENERGY RES INST , HITACHI ENG CO LTD
发明人： HAYASHI KATSUMI , HANDA HIROYUKI , MIZOGUCHI TADANORI , MIYA NAOYUKI , NAGAMI MASAYUKI
IPC分类号： G21B1/11 , G21B1/25 , G21C11/08 , G21F1/08 , H01F6/00 , H01F6/06 , H01F7/22 , G21B1/00 , H01F5/08
摘要： PURPOSE:To prevent heat generation and damage due to radiation of a superconducting material by arranging element of lithium or material including lithium in such a manner as surrounding at least a region of superconducting material to be exposed to neutron. CONSTITUTION:A superconducting coil formed by winding and bundling a plurality of lines of superconducting material 1 is arranged and supported in plural numbers in a bobbin. In both sides of a train of this superconducting coils, insulating materials 3 are stacked and a heat shielding material 5 is arranged within the region to be exposed to the neutron of insulating materials 3. The further outside of this heat shielding material 5 is provided with a material layer 6 including lithium. With this material layer 6, the neutron acts for n, alphareaction to reduce neutron. Moreover, the material layer 6 does not generate the secondary gamma rays. Thereby, heat generation by radiation of superconducting coil can be prevented and damage of superconducting coil due to neutron can also be prevented.

2. 发明专利

JPH06324193A PENETRATING PART SHIELDING STRUCTURE 失效
公开(公告)号：JPH06324193A
公开(公告)日：1994-11-25
申请号：JP11138593
申请日：1993-05-13
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： HAYASHI KATSUMI , TOTSUKA FUMIO , NARITA HITOSHI , HANDA HIROYUKI , TAKEUCHI JUN
IPC分类号： G21C11/02 , G21C13/036 , G21D1/00 , G21F3/00
摘要： PURPOSE:To restrain a shielding material in proper quantity, facilitate maintenance of a member, and reduce exposure of an operator by dislocating openings little by little after the openings aligned of plural shielding bodies are and the penetrating member is inserted and installed. CONSTITUTION:A large number of shielding bodies 9 having a through-hole 12 and a shielding body 10 having a handle 11 are arranged inside of a push in sleeve 2 by fastening by a bolt and nut. In the first place, after the shielding body 10 and the large number of shielding bodies 9 are combined with each other so that the through-hole 12 is put in a straight line shape, a penetrating member 3 inserted in a protective pipe 13 is inserted/arranged. Next, when the shielding bodies 9 are twisted by the handle 11, the shielding bodies 9 are dislocated in order by being dragged by the protective pipe 13, and lastly, the through-hole 12 is formed relatively in an almost helical shape. In this way, prescribed shielding performance is secured, and a shielding effect is made variable, and installation, removal and maintenace of the penetrating member 3 or installation of the shielding bodies 9 can be facilitated, and exposure of an operator can be reduced.

3. 发明专利

JPS6170484A Radioactivating foil 失效
标题翻译：放射性脂肪
公开(公告)号：JPS6170484A
公开(公告)日：1986-04-11
申请号：JP19164084
申请日：1984-09-14
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： TOKUNO ATSUSHI , HAYASHI KATSUMI
IPC分类号： G01T3/00
摘要： PURPOSE: To make possible the simultaneous measurement of neutron energy spectra over a wide range in a short period without spoiling the ease of a radioactivating foil method by using the foil in which plural nuclides are combined to one in the form of an alloy or mixture.
CONSTITUTION: For example, gold, nickel, aluminum, titanium and alloy are selected as the nuclides to constitute the foil and are mixed at a suitable ratio. The mixture is melted at a high temp. to manufacture the alloy which is then molded to a disk shape. Such disk shape alloy is used. When the foil is subjected to irradiation of neutrons, the foil is made radioactive by the reaction of the neutrons in the energy range different with the nuclides and atomic nuclei and the foil releases gamma rays. Since just one foil is required for the measurement, the time for the measurement is reduced.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了在短时间内在宽范围内同时测量中子能谱，可以通过使用将多个核素结合成合金或混合物形式的箔而不破坏放射性活化箔方法的容易性。构成：例如，选择金，镍，铝，钛和合金作为构成箔的核素，并以适当的比例混合。混合物在高温下熔化。以制造合金，然后将其模制成盘形。使用这种盘形合金。当箔经受中子照射时，通过在与核素和原子核不同的能量范围内的中子的反应使箔成为放射性的，并且箔释放γ射线。由于测量需要一个箔片，所以测量时间减少了。

4. 发明专利

JPS5863899A RADIOACTIVE LIQUID WASTE TANK 失效
公开(公告)号：JPS5863899A
公开(公告)日：1983-04-15
申请号：JP16268981
申请日：1981-10-14
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： HAYASHI KATSUMI
IPC分类号： G21F9/22 , B65D90/00

5. 发明专利

JP2000206298A SOLID TARGET NEUTRON GENERATOR 失效
公开(公告)号：JP2000206298A
公开(公告)日：2000-07-28
申请号：JP882399
申请日：1999-01-18
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NAKANO HIDEO , HAYASHI KATSUMI , DOGE HIDENORI , NAKAMURA FUMITO , SAKASHITA MOTOAKI
IPC分类号： G21K5/02 , H05H6/00
摘要： PROBLEM TO BE SOLVED: To retard corrosion as effectively as cathode corrosion prevention without using an external power source by using a metal material that is more excellent in corrosion resistance than a target plate on the side where a proton beam is incident. SOLUTION: When a gold target plate 11 is irradiated with a proton beam of 1.5 GeV in energy, 1 mA in electric current and about 8 cm X about 5.5 cm in size that is obtained from an accelerator, the target plate 11 is positively charged by a positive electrical charge of protons. On this occasion, potential difference appears because an insulator 12 made of ceramics and the like is located between the gold target plate 11 and a supporting frame 2. Notably, metals of a target plate 1, the supporting frame 2 and a target container 3 are kept grounded. Though gold is used only for the first layer of the target plate 11, it may be used for the second and more inner layers because gold in itself also emits so many neutrons through a nuclear crush reaction and is so excellent in corrosion resistance and thermal conductivity that it can be a promising target material. In this case, an insulator 12 made of ceramics and the like may also be located between the target plate 11 and the supporting frame 2. This makes it possible to retard the corrosion of the plate 1, the supporting frame 2 and the container 3.

6. 发明专利

JPH10221489A FACILITY FOR SHIELDING RADIATION AND METHOD FOR SHIELDING RADIATION IN THE FACILITY 失效
公开(公告)号：JPH10221489A
公开(公告)日：1998-08-21
申请号：JP2473597
申请日：1997-02-07
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TAYAMA RYUICHI , HAYASHI KATSUMI , HIROTA JUNICHI
IPC分类号： G21F7/00 , G21F7/005
摘要： PROBLEM TO BE SOLVED: To provide a shielding door which shields radiation and does not hinder the workability of work conducted on a passage by providing a space for housing the door in a radiation shielding wall which is faced to another radiation shielding wall having an opening with a maze in between and installing the door so that the door may move freely between the opening and space. SOLUTION: When the dose equivalent rate is high after irradiation is completed, a shielding door 4 is housed in an opening 13 so as to shield a room 5 containing a radiation source 1. While a space 16 is opened, a separating wall 14 and the door 4 prevent the leakage of radiation. When the dose equivalent rate is low after irradiation is completed and a person wants to enter the room 5, the door 4 is moved toward the space 16 by running the door 4 on rails 6 by rotationally driving wheels 10 by means of a driving device 9 and the door 4 is housed in the space 16 from the opening 13. After the door 4 is housed in the space 16, the person enters the room 5 through a maze 3 and equipment is carried in or out from the room 5. Since the door 4 is utilized as a radiation shielding body by housing the door 4 in one wall, the door 4 is not left on the outside of the wall and the equipment can be easily carried in and out from the room 5.

7. 发明专利

JPS5858496A NUCLEAR FUEL ASSEMBLY 失效
公开(公告)号：JPS5858496A
公开(公告)日：1983-04-07
申请号：JP15619581
申请日：1981-10-02
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SAKUMA TAKAYUKI , HAYASHI KATSUMI , SUGIZAKI TOSHIHIKO , MORIYA KIMIAKI , KOMURO YASUHIRO , KISHI HIROHISA
IPC分类号： G21C3/00 , G21C3/32 , G21C3/33

8. 发明专利

JP2002311193A DECONTAMINATION DEVICE FOR RADIOACTIVE CONTAMINATOR 失效
公开(公告)号：JP2002311193A
公开(公告)日：2002-10-23
申请号：JP2001116294
申请日：2001-04-16
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： HANAZAWA SADAO , HAYASHI KATSUMI , MAKINO MASAYUKI
IPC分类号： G21F9/28 , G21F9/06
摘要： PROBLEM TO BE SOLVED: To efficiently decontaminate decontamination objects without damaging and decontaminating the surface of parts adhered by radioactive materials by the contact of reactor water in a nuclear power plant, reduce radioactive waste liquid and drastically reduce the dose of workers. SOLUTION: The device is constituted of a decontaminating mechanism combining a device for bubbling water to a decontamination object and a discharge nozzle of high pressure water, a mechanism for recovering and separating removed radioactive waste liquid and a mechanism for monitoring and controlling decontamination state. The outlet water separated from the waste liquid is reused as high-pressure water. Consequently, decontamination is automatically and efficiently done without changing the steps of the decontamination device and the dose of workers can be drastically reduced. Also, decontamination waste liquid is drastically reduced by reusing outlet water for decontamination which is separated from decontamination waste liquid with a filter.

9. 发明专利

JP2000162399A NEUTRON-GENERATING DEVICE UTILIZING PROTON 失效
公开(公告)号：JP2000162399A
公开(公告)日：2000-06-16
申请号：JP33527498
申请日：1998-11-26
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NAKAMURA FUMITO , KUMASAKA KATSUYUKI , KATO KOHEI , DOGE HIDENORI , HAYASHI KATSUMI , SAKASHITA MOTOAKI , TANAKA WATARU
IPC分类号： G21K5/08 , H05H3/06 , H05H6/00
摘要： PROBLEM TO BE SOLVED: To obtain a device for generating neutrons stably for a long time as a reliable target with a long life by joining a substance where it is a low hydrogen absorption material at a usage temperature region as a covering material, has improved corrosion resistance against cooling water, has less neutron absorption, and has the closest physical properties with the target material to the target material. SOLUTION: As a covering material 2, metal Nb, Pt, Au, Al, Be, Cr, stainless steel, or the like with improved corrosion resistance against cooling water is used. For joining, HIP, pressurized adhesion, or the like is used. A target 3 where the covering material 2 is joined to a target material 1 is installed in a target casing 4. The casing 4 is approximately 250 mm lengthwise and breadthwise and is 1,000 mm long, while the target is approximately 150 mm lengthwise and breadthwise and is 2-10 mm thick and is covered with the covering material that is 0.1-several mm thick. A proton beam 5 hits against a target 3 to generate a neutron 6. Generation of heat due to reaction is eliminated by cooling water 9 being supplied from a cooling water inlet 7 and the temperature of the target 3 is maintained to be equal to or less than a melt point.

10. 发明专利

JPH07333382A CORE MONITORING DEVICE FOR REACTOR 失效
公开(公告)号：JPH07333382A
公开(公告)日：1995-12-22
申请号：JP12731394
申请日：1994-06-09
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHII TAKANOBU , HANDA HIROYUKI , HAYASHI KATSUMI , NARITA HITOSHI , SHIMOZAKI TAKAAKI
IPC分类号： G21C17/12
摘要： PURPOSE:To obtain the method for easily detecting the event increasing the void fraction in the coolant in a part of channels in case of a flow blockage events. CONSTITUTION:With a fast neutron flux detector 11 placed in a guide tube 1 and an output calibration detector 12 placed in detection lead pipe 10 for output calibration, the fluctuation in the fast neutron flux level due to void fraction variation in the coolant generated from fuel element 1 can be detected. By this, such a coolant flow lowering event due to flow blockage can be detected early.

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