专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH10300877A FUEL ASSEMBLY FOR LIGHT WATER REACTOR 失效
公开(公告)号：JPH10300877A
公开(公告)日：1998-11-13
申请号：JP10741797
申请日：1997-04-24
申请人： TOSHIBA CORP
发明人： WATANABE SHOICHI , YUTANI YORIAKI , KAWASHIMA MASATOSHI
IPC分类号： G21C3/26 , G21C3/328
摘要： PROBLEM TO BE SOLVED: To improve the combustion efficiency of Pu and improve the reactor core characteristic by using a vibration compaction fuel rod obtained by mixing and packing a granular nuclear fuel material and a granular non-nuclear fuel material having a small neutron absorption cross section into a coated pipe. SOLUTION: A granular nuclear fuel material 16 and a diluent granule 31 of non-nuclear fuel material having a small neutron absorption cross section are mixed together and packed in the coated pipe 15 of a vibration compaction fuel rod. Each grain size of the nuclear fuel material 16 and the diluent granule 31 is variously set. According to this packing method, the quantity of U-238 which is a parent material is reduced while storing the quantity of Pu, and the neutron absorption quantity of Pu is thus increased to enhance the combustion efficiency, so that the reactor core characteristict is improved. To the diluent granule 31, high density graphite having a high heat conductivity is added in an amount of about 20-95% by volume ratio to lower the average temperature of the fuel, and the internal pressure of the fission product gas is reduced. According to this structure, the charge weight of the fissible material per assembly can be reduced to improve the combustion efficiency.

2. 发明专利

JPH0119554B2 失效
公开(公告)号：JPH0119554B2
公开(公告)日：1989-04-12
申请号：JP899482
申请日：1982-01-25
申请人： DORYOKURO KAKUNENRYO KAIHATSU JIGYODAN
发明人： HAYASHI KYOZUMI
IPC分类号： G21C3/26 , G21C3/06 , G21C3/28 , G21C3/62

3. 发明专利

JPS6044638B2 JPS6044638B2 - 失效
公开(公告)号：JPS6044638B2
公开(公告)日：1985-10-04
申请号：JP15730677
申请日：1977-12-28
申请人： Tokyo Shibaura Electric Co
发明人： YOSHIDA TOYOICHI
IPC分类号： G21C3/00 , G21C3/22 , G21C3/26 , G21C3/62
CPC分类号： Y02E30/38

4. 发明专利

JPS58142293A NUCLEAR FUEL ROD 失效
公开(公告)号：JPS58142293A
公开(公告)日：1983-08-24
申请号：JP2451882
申请日：1982-02-19
申请人： HAYASHI KIYOZUMI
发明人： HAYASHI KIYOZUMI
IPC分类号： G21C3/26 , G21C3/28 , G21C3/62

5. 发明专利

JPS5896278A NUCLEAR FUEL ROD FILLED WITH CLADDED FUEL PARTICLE 失效
公开(公告)号：JPS5896278A
公开(公告)日：1983-06-08
申请号：JP19548781
申请日：1981-12-04
申请人： DORYOKURO KAKUNENRYO , JAPAN ATOMIC ENERGY RES INST
发明人： HAYASHI KIYOZUMI , IWAMOTO TAMI
IPC分类号： G21C3/00 , G21C3/20 , G21C3/26 , G21C3/28

6. 实用新型

JPS5688185U 失效
公开(公告)号：JPS5688185U
公开(公告)日：1981-07-14
申请号：JP17105879
申请日：1979-12-12
IPC分类号： G21C3/26 , G21C3/16

7. 发明专利

JPS5490495A FUEL ELEMENT 失效
公开(公告)号：JPS5490495A
公开(公告)日：1979-07-18
申请号：JP15730677
申请日：1977-12-28
申请人： TOKYO SHIBAURA ELECTRIC CO
发明人： YOSHIDA TOYOICHI
IPC分类号： G21C3/00 , G21C3/22 , G21C3/26 , G21C3/62
摘要： PURPOSE:To reduce the core internal pressure loss of a coolant by forming recess on the surface of a graphite shell for coating the fuel matrix of coating fuel particles. CONSTITUTION:A fuel matrix 9 consists of coating fuel particles and carbon mixture combustible material, and is coated with a graphite shell 11 having a number of recesses 12 fromed on the surface thereof. This spherical fuel element is mounted by freely dropping from the position of the upper reflector 3 of a pebble-bed core 1 onto the core upper portion by a fuel charging tube 4, and picked up out of the core from a fuel exhaust tube 5. Coolant flows in the air gap of fuel element filling layers to reach the lower core plenum 6. The coolant becomes easily flown through the core by forming recesses 12 on the surface of graphite shell.

8. 发明专利

JP2000199794A PREPARATION METHOD OF VIBRATION FILLING BODY 失效
公开(公告)号：JP2000199794A
公开(公告)日：2000-07-18
申请号：JP10099
申请日：1999-01-04
申请人： HITACHI LTD
发明人： MIYATA MOTOYUKI , OGUMA MASAOMI , HAYASHIBARA MITSUO
IPC分类号： B22F3/02 , B22F3/035 , G21C3/26 , G21C21/02
摘要： PROBLEM TO BE SOLVED: To prepare a uniform filling body by controlling the vibration, amplitude when a vessel containing mixed particles comprising different particular diameters is filled while vibration is applied. SOLUTION: A segregation model supposes a void 3, into which one minimum particular diameter particle comes on the lower part of the maximum particular diameter particle 1, a ridge line 4 formed by the tangential line of the maximum particular diameter particle 1 and a particle 2 is assumed to be maintained during vibration. When the interval between the ridge line 4 and the maximum particular diameter particle 1 is larger than the diameter of the minimum particular diameter particle 5, when the maximum particular diameter particle 1 is lifted upward by vibration, the minimum particular diameter particle 5 positioned on the upper side face of the maximum particular diameter particle 1 is assumed to enter into the lower part of the maximum particular diameter particle 1. Then, if the vibration amplitude is larger than the moving amount of the maximum particular diameter particle 1, the minimum particular diameter particle 5 comes into the lower part of the maximum particular diameter particle 1, which moves upward. Thus, segregation is suppressed to prepare a uniform filling body by controlling the vibration amplitude.

9. 发明专利

JPH0943391A NUCLEAR FUEL RECYCLE SYSTEM 失效
公开(公告)号：JPH0943391A
公开(公告)日：1997-02-14
申请号：JP19157795
申请日：1995-07-27
申请人： TOSHIBA CORP
发明人： SAKASHITA YOSHIAKI , YOKOYAMA TSUGIO , KAWASHIMA MASATOSHI , FUJITA REIKO , KOBAYASHI TSUGUYUKI , YAMAOKA MITSUAKI
IPC分类号： G21C3/26 , G21C3/62 , G21C19/46 , G21C21/04
摘要： PROBLEM TO BE SOLVED: To reduce reprocessing quantity by separating minor actinides from rare earth element and efficiently utilize minor actinides for fuel without giving large impact on a recycle system by a wet reprocessing. SOLUTION: Spent fuel 5 from a light water reactor core 3 separates Pu, Np by an improved Purex process 6 and minor actinides(MA) and rare earth element (RE) are separated into FD except for RE and a mixture of MA and RE by a Truex process 8. The MA and RE are separated by a metal reduction process 9 and the MA is used for fuel of a specific fuel aggregate 11. The specific fuel aggregate 11 is loaded in a fast reactor core 4 so as to be driven. The spent specific fuel aggregate 12 is separated into RE (most of them), and MA, RE (some) by an MA recycle system 2 by an electrolytic purification 10. Though the core fuel aggregate 7 is loaded in a fast reactor core 4, it is returned between the light water reactor core 3 and the spent fuel 5 by a core fuel aggregate recycle system 1 after the drive.

10. 发明专利

JPH0245797A PARTICLE BED TYPE FUEL ELEMENT 失效
公开(公告)号：JPH0245797A
公开(公告)日：1990-02-15
申请号：JP16101789
申请日：1989-06-26
申请人： BABCOCK & WILCOX CO
发明人： RICHIYAADO BUII DEMAASU
IPC分类号： G21C3/26 , G21C3/04 , G21C3/18 , G21C3/28
摘要： PURPOSE: To give fuel particles no damage, loose no filling degree thereof and contrive proper distribution of cooling gas so that the fuel particles are nearly not displaced even if thermal expansion and thermal contraction produce by providing a plurality of compression fitting in a particle floor. CONSTITUTION: A first compression fitting 18 is constituted of a spring 30 and a washer 32 disposed on the end of a fuel element 10. The washer 32 is slidably disposed between an inside frit 12 and an outside frit 14 and contacted to a corresponding spring 30 with pressure. Compression force is maintained for a particle floor 16, and since expansion and contraction by heat of the particle floor 16 is elastically allowed, the compression force does not give excessive stress or looseness in a fuel particle. Excessive friction force due to thermal expansion which cannot be absorbed by only the compression fitting 18 at the axial center part of the particle floor generates and as a result, plugging due to friction of the fuel particle and excessive compression load is produced. A second compression fitting 20 disposed in the particle floor 16 of an annular chamber 26, and local expansion of the center part of the particle floor can be absorbed. A plurality of the compression fittings 20 can be used.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式