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1. 发明专利

JP2007298285A Apparatus for measuring charged particle 有权
标题翻译：用于测量充电颗粒的装置
公开(公告)号：JP2007298285A
公开(公告)日：2007-11-15
申请号：JP2006123994
申请日：2006-04-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KAWADA YOSHINARI , KITAGUCHI HIROSHI , KAIHARA AKIHISA , NAKAGAWA YASUHIRO
IPC分类号： G01T7/00 , G01T1/24 , G01T1/36
摘要： PROBLEM TO BE SOLVED: To provide an apparatus for measuring charged particles for identifying a radionuclide radiating charged particles such as α-rays and measuring radioactivity intensity, in which contamination of a charged particle detector caused by recoil particles can be reduced.
SOLUTION: The α-ray measuring apparatus 100 includes an elevator 5 allowing the distance between a sample under measurement 2 and a charged particle incident surface of a semiconductor detector 1 to be regulated, a position sensor 5a, a control unit 13, and an α-ray radiation nuclide analyzer 40. The α-ray radiation nuclide analyzer identifies a nuclide radiating α-rays having the maximum energy value, determines a measurement condition distance value d of the distance on the basis of the nuclide, the maximum energy value, and N
2 gas pressure in a measurement chamber 7 measured by a vacuum monitor 9, and allows the control unit to control the elevator and to regulate the distance.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题：提供一种用于识别放射性核素的装置，用于识别辐射带电粒子如α射线的放射性核素和测量放射性强度，其中可以减少由反冲颗粒引起的带电粒子检测器的污染。解决方案：α射线测量装置100包括允许测量样本2和半导体检测器1的带电粒子入射表面之间的距离被调节的电梯5，位置传感器5a，控制单元13，和α射线辐射核素分析器40.α射线辐射核素分析仪识别发射具有最大能量值的α射线的核素，确定基于核素的距离的测量条件距离值d，最大能量值和N 2 气压，并且允许控制单元控制电梯并调节距离。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JPH1123760A NUCLEAR FUEL ASSEMBLY SECURITY STRUCTURE 失效
公开(公告)号：JPH1123760A
公开(公告)日：1999-01-29
申请号：JP17350997
申请日：1997-06-30
申请人： HITACHI LTD
发明人： SUGANO SATOSHI , MIYAZAKI KATSUMASA , KAWADA YOSHINARI , NAKAJIMA JUNJIRO
IPC分类号： G21C3/30 , G21C17/06
摘要： PROBLEM TO BE SOLVED: To ensure security for nuclear fuel assembly without providing a new seal by giving the structural parts of the nuclear fuel assembly uniqueness and nonreproducibility. SOLUTION: A means to give uniqueness to the structural parts of a nuclear fuel assembly is to record grain boundary pattern of metal material in advance. A means to give nonreproducibility is to use a freely rotatable washer for a bolt and a nut 1 and put marks 3 on both after fastening the nut 1 so that the relation between the nut and the washer is known. To combine both is the remedy to give uniqueness and nonreproducibility to the structure parts.

3. 发明专利

JPH0569195B2 失效
公开(公告)号：JPH0569195B2
公开(公告)日：1993-09-30
申请号：JP18264885
申请日：1985-08-20
申请人： HITACHI LTD
发明人： KAWADA YOSHINARI , SAKUMA TORAYOSHI
IPC分类号： G21C3/34

4. 发明专利

JPH0333690A LOWER TIE PLATE OF FUEL ASSEMBLY FOR LIGHT WATER REACTOR 失效
公开(公告)号：JPH0333690A
公开(公告)日：1991-02-13
申请号：JP16669589
申请日：1989-06-30
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MIZUNO TADASHI , NAKAMURA SHOZO , YASUDA TETSUO , MARU AKIRA , KAWADA YOSHINARI , YANAGI YOSHIHIKO , AIZAWA YASUHIRO
IPC分类号： G21C3/33
摘要： PURPOSE:To decrease a leakage from a gap between a channel box and a lower tie plate by providing a pressure loss urging plate along an outer edge of a grid surface of the lower tie plate and by increasing a total pressure loss at the gap part. CONSTITUTION:An upper and a lower ends of a fuel assembly for a light water reactor, is constrained by a plurality of fuel rods, an upper tie plate and a lower tie plate 4, and an intermediate part part is constituted by fuel bundles 5 which are regularly lined and supported by a plurality of spacers 3, and by a channel box 6 which contains the bundles 5. At the lower tie plate 4, a plane shaped pressure loss urging plate 8 is provided along an outer edge of a grid surface 3, and an end tip of the plate 8 has an edge shape having an acute angle at its channel box side. With this configuration, a leaking flow amount 11 from a gap 10 between the channel box 6 and the lower tie plate 4, can be reduced.

5. 发明专利

JPH02136785A FUEL ASSEMBLY 失效
公开(公告)号：JPH02136785A
公开(公告)日：1990-05-25
申请号：JP29082588
申请日：1988-11-17
申请人： HITACHI LTD
发明人： YANAGI YOSHIHIKO , HIRAKAWA HIROMASA , KAWADA YOSHINARI , NAKAJIMA JUNJIRO , NAKAMURA SHOZO , MIZUNO TADASHI
IPC分类号： G21C3/33 , G21C3/322 , G21C3/326
摘要： PURPOSE:To prevent the concentration of cooling water around large-diameter water rods by forming the 1st, 2nd apertures for cooling water passage of a lower tie plate in such a manner that the coefft. of pressure drop in the 1st apertures is larger than the coefft. of pressure drop in the 2nd apertures. CONSTITUTION:The plural apertures 34b for passing the cooling water between the large-diameter water rods 22 and 23 formed in a 1st region 33b around the large-diameter water rods 22, 23 of the lower tie plate 25 are designated as the 1st apertures for the cooling water passage and the plural apertures 34a formed in a 2nd region 33a around fuel rods 21 of the lower tie plate 25 are designated as the 2nd apertures for cooling water passage. The 1st and 2nd apertures for cooling water passage are then so formed that the coefft. of pressure drop in the 1st apertures for cooling water passage is larger than the coefft. of pressure drop in the 2nd apertures for cooling water passage. The pressure drop viewed in the axial line direction of the fuel assembly is balanced between the water rods and the fuel rods as well as between the fuel rods and the concentration of the cooling water around the central water rods is prevented. The thermal stability of the peripheral fuel rods is thus improved.

6. 发明专利

JPH01276095A FUEL ASSEMBLY 失效
公开(公告)号：JPH01276095A
公开(公告)日：1989-11-06
申请号：JP10394888
申请日：1988-04-28
申请人： HITACHI LTD
发明人： YANAGI YOSHIHIKO , HIRAKAWA HIROMASA , KAWADA YOSHINARI , NAKAJIMA JUNJIRO , TADA NOBUO , NAKAMURA SHOZO , MIZUNO TADASHI
IPC分类号： G21C3/10 , G21C3/18 , G21C3/30 , G21C3/326 , G21C3/328 , G21C3/34
摘要： PURPOSE:To decrease the oscillation amplitude at the top end of a short-sized fuel rod and to lessen the fretting corrosion of a fuel spacer which supports the top end of the short-sized fuel rod by specifying the ratio of the length DELTAlbetween the fuel rod supporting part of the spacer and the top end of the short-sized fuel rod and the length lM between the fuel rod supporting parts of the fuel spacer. CONSTITUTION:The short-sized fuel rod 10 which is mounted at the bottom end to a lower tie plate 15 is axially supported by 5 pieces of the fuel spacers; the 1st spacer A, the 2nd spacer B, the 3rd spacer C, the 4th spacer D, and the 5th spacer E. The oscillation amplitude ratio (deltaE/deltaM) increases sharply when the projection length R (=DELTAl/lM) of the fuel rod 10 from the 5th spacer E is larger than 1/4. The fretting corrosion of the 5th spacer E can be decreased down to about the same level as the fretting corrosion of the other spacers simply by adjusting the oscillation amplitude ratio (deltaE/deltaM) to

7. 发明专利

JPS63249095A FUEL AGGREGATE 失效
公开(公告)号：JPS63249095A
公开(公告)日：1988-10-17
申请号：JP8290887
申请日：1987-04-06
申请人： HITACHI LTD
发明人： NAGASHIMA HIDEAKI , KAWADA YOSHINARI , HIRAKAWA HIROMASA , HASEGAWA KUNIO , SUGANO SATOSHI , NAKAMURA SHOZO , SHIOHATA HIRONORI
IPC分类号： G21C3/33 , G21C3/30 , G21C3/324

8. 发明专利

JPS63159789A FUEL SPACER AND NUCLEAR FUEL AGGREGATE 失效
公开(公告)号：JPS63159789A
公开(公告)日：1988-07-02
申请号：JP30644086
申请日：1986-12-24
申请人： HITACHI LTD
发明人： UCHIKAWA SADAO , BESSHO TAISUKE , AOYAMA TADAO , MORIMOTO YUICHI , YAMASHITA JUNICHI , KAWADA YOSHINARI
IPC分类号： G21C3/34

9. 发明专利

JPS63149592A FUEL AGGREGATE 失效
公开(公告)号：JPS63149592A
公开(公告)日：1988-06-22
申请号：JP29487586
申请日：1986-12-12
申请人： HITACHI LTD
发明人： SHIOHATA HIRONORI , NAKAMURA SHOZO , MIZUSHINA YASUO , KAWADA YOSHINARI , UOZUMI HIROTO
IPC分类号： G21C3/34

10. 发明专利

JPS6243592A ELASTIC SUPPORTER FOR HOLDING FUEL ROD, ETC. USED FOR SAPCEROF FUEL AGGREGATE 失效
公开(公告)号：JPS6243592A
公开(公告)日：1987-02-25
申请号：JP18264885
申请日：1985-08-20
申请人： HITACHI LTD
发明人： KAWADA YOSHINARI , SAKUMA TORAYOSHI
IPC分类号： G21C3/34

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