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

JPH05288876A 失效
公开(公告)号：JPH05288876A
公开(公告)日：1993-11-05
申请号：JP8880892
申请日：1992-04-09
申请人： TOSHIBA CORP
发明人： IIDA MASAAKI
IPC分类号： G21C1/02
摘要： PURPOSE:To obtain a steam cooled fast reactor for securing a proper safety by reducing a cooling material void reactivity to approximately 1 dollor or less by miniaturizing and flattening a reactor core, at the same time surrounding the center and perimeter of the reactor core with a neutron absorber, and then mixing a neutron deceleration material into the reactor core. CONSTITUTION:A reactor core shape is flattened and at the same time a neutron absorber 4 is laid out at the center of the reactor core and at the outer perimeter of the reactor core 1 and then a neutron deceleration material 7 which is equal to or more than approximately two times larger than the neutron deceleration performance of a steam 9 on operation of reactor is charged to the reactor core 1, thus suppressing the reactor core cooling material void reactivity to approximately 1 dollor or less. Then, non-critical state is achieved without any special reactor core designing when the reactor core is submerged and inserting a control rod into the reactor core.

2. 发明专利

JPH04194780A SMALL REACTOR 失效
公开(公告)号：JPH04194780A
公开(公告)日：1992-07-14
申请号：JP32756290
申请日：1990-11-28
申请人： TOSHIBA CORP
发明人： KAWASHIMA MASATOSHI , AOKI KATSUTADA , MIYAKI KAZUMI , IIDA MASAAKI
IPC分类号： G21C1/02 , G21C5/00 , G21C7/28
摘要： PURPOSE:To strengthen ability of natural reactor termination due to intrinsic reactivity feedback effect even in core flow decrease by specifying the relation between core and fuel elevations and the effective length of reflector. CONSTITUTION:By providing a reflector 2 around a core 1 and moving the reflector 2 mainly up and down directions, reactivity of the core is controlled. When the height of core fuel part H, core equivalent diameter D, and the effective length of the reflector L are defined, the core is formed in vertically long cylinder shape satisfying H/D>1 and L/H is set in the range 0.4 to 0.6. Therefore, if the core void coefficient during operation term becomes lower than zero, and such a low frequency event as flow decrease type event during rated power operation occurs, reactor termination maintaining core integrity is possible and the reactivity life of core is extended.

3. 发明专利

JPH0484798A OUTPUT CONTROL METHOD OF FAST BREEDER AND ITS DEVICE 失效
公开(公告)号：JPH0484798A
公开(公告)日：1992-03-18
申请号：JP20032090
申请日：1990-07-27
申请人： TOSHIBA CORP
发明人： IIDA MASAAKI , AOKI KATSUTADA , KAWASHIMA MASATOSHI , MIYAKI KAZUMI
IPC分类号： G21C7/28
摘要： PURPOSE:To compensate the lowering of reactivity to contrive the simplicity and the like of a nuclear reactor structure by forming a reflector area between a reactor core and the inner face of a reactor vessel and continuously dropping a particle powder-like reflector upward thereof in this area by the self-weight. CONSTITUTION:A reflector area 8 is provided at a position corresponding to a reactor core 1 on the circumferential side of a reactor stop rod elevating and lowering area 6. A neutron absorber 9 is arranged on the circumferential side of this area 8 and a quantity of neutron radiation during the whole operation of a reactor vessel 2 is made the constitution for controlling within a limiting value. A storage tank 10 is arranged at the upper position of the area 8 and the absorber 9, a particle powder-like reflector 11 is charged in this tank 10 and a gas space on the upper end of the tank 10 and another gas space on the upper end of the area 8 are communicated by a pressure regulator 12. The outlet 13 of the storage tank for opening the upper end part of the area 8 is provided on the lower end part of the tank 10. The outlet 13 is closed up by the use of a plug 14 made of low fusion material such as aluminum. On the reflector 11 the plug 14 is melted by electrical heating to open the outlet 13 and is dropped by the self-weight in the area 8 continuously.

4. 发明专利

JPH09127282A FAST REACTOR CORE AND ITS SPECIAL ASSEMBLY 失效
公开(公告)号：JPH09127282A
公开(公告)日：1997-05-16
申请号：JP28549895
申请日：1995-11-02
申请人： TOSHIBA CORP
发明人： IIDA MASAAKI , WAKAMATSU MITSUO
IPC分类号： G21C9/033 , G21C3/324 , G21C7/28
摘要： PROBLEM TO BE SOLVED: To prevent void reactivity of coolant (Na) from increasing during the trip of primary system main pump. SOLUTION: By loading special fuel assemblies 1 containing gas cans 3, 4 in wrapper tubes 2 in the core, a fast reactor core is constituted. The gas cans 3, 4 locate in core region 5 as shown in (b) and move to the regions of upper and lower axial blankets 6, 7 during the trip of the primary system main pump as shown in (c). As the gas cans 3, 4 increase neutron leakage out of the core when the primary main pump tripped and coolant flow stopped, negative reactivity can be added in the core.

5. 发明专利

JPH05119178A FAST REACTOR 失效
公开(公告)号：JPH05119178A
公开(公告)日：1993-05-18
申请号：JP27574391
申请日：1991-10-23
申请人： TOSHIBA CORP
发明人： IIDA MASAAKI , ARIE KAZUO
IPC分类号： G21C5/00 , G21C5/20
摘要： PURPOSE:To achieve higher safety, an ensuring of a PU breeding ratio and the like with a lowering of the degree of coolant void reaction by surrounding an absorbent area containing fission products with a depleted uranium in a core and a blanket area near the core. CONSTITUTION:An intermediate absorbent area 2 loaded with TC as fissile product and TCO2 as compound thereof is formed near the center surface of a core 1 and set at upper and lower parts of the core area 1. A ratio of the volume held by the TC and TCO2 in the area 2 is. for example. 60%. An internal shaft blanket 3 composed of the depleted uranium is provided contacting the area 2 at upper and lower positions. A shaft blanket 4 and a diameter blanket 5are arranged on the outer circumference side of the core. When the blanket 3 is replaced with a neutron decelerator, the absorption sectional area of the fission product is larger with a lower neutron energy in general. Thus, a higher neutron absorption rate of the TC al lows increase in TCNO.

6. 发明专利

JPH09166674A CORE FOR NUCLEAR REACTOR 失效
公开(公告)号：JPH09166674A
公开(公告)日：1997-06-24
申请号：JP32859795
申请日：1995-12-18
申请人： TOSHIBA CORP
发明人： YOKOYAMA TSUGIO , MATSUYAMA SHINICHIRO , IIDA MASAAKI , MORIKI YASUYUKI
IPC分类号： G21C1/02 , G21C3/328 , G21C3/62 , G21C5/12
摘要： PROBLEM TO BE SOLVED: To improve the safety and economy of a core by leveling the power distribution and lowering the maximum temperature of fuel. SOLUTION: In the core 1a for a fast breeder reactor provided with a core fuel region 33 loaded by granule fuel enriching fissile material and axial blanket 6 and radial blanket 7 with fertile material as main component so as to surround this core fuel region 33, the core fuel region 33 is arranged by being partitioned from the center to the outside into a low filling density region 34, a medium filing density region 35 and a high filling density region 36. Inside the core 1a constituted in this manner, the filling density of the granule fuel is small and the filling density becomes large toward the outside and therefore, the regional difference in fission the becomes small, maximum power becomes small compared with the case with uniform filling density at the same whole core power, and thus, leveling of the power distribution is attained.

7. 发明专利

JPH05323077A FAST REACTOR CORE 失效
公开(公告)号：JPH05323077A
公开(公告)日：1993-12-07
申请号：JP12731392
申请日：1992-05-20
申请人： TOSHIBA CORP
发明人： SUZUKI MASAO , IIDA MASAAKI , ARIE KAZUO
IPC分类号： G21C5/00 , G21C5/20
摘要： PURPOSE:To reduce the sodium void reactivity of a fast reactor core, improve the safety and licensing acceptability drastically and suppress the increase in core size. CONSTITUTION:A plurality of outer fuel assemblies 5 charged with fissile material are arranged annularly. In the annulus inside, neutron absorber assemblies 8 charged with neutron absorber material are arranged. Inside of the neutron absorber assemblies, inner fuel assembly 9 having sodium plenum region 11 are arranged at the center level of the core axial direction. The upper core 12 is formed in the upper part of the sodium plenum region 11 and the lower core 13 is formed in the lower part of the sodium plenum region 11.

8. 发明专利

JPH04299286A OPERATING METHOD OF CORE FOR FAST REACTOR 失效
公开(公告)号：JPH04299286A
公开(公告)日：1992-10-22
申请号：JP6482291
申请日：1991-03-28
申请人： TOSHIBA CORP
发明人： KAMEI TAKANOBU , IIDA MASAAKI
IPC分类号： G21C5/00
摘要： PURPOSE:To make power uniform with one kind of enrichment degree fuel, though several kinds of enrichment degree are needed for the uniforming of a power distribution. CONSTITUTION:A fuel assembly where minor actinides are added 20 to 30% at weight ratio in uranium-plutonium mixed fuel for a fast reactor is loaded in and around the center of a core. The assembly is in order moved from the center side of the core to a peripheral direction in a fuel replacing time. The fuel is converted into a nuclide whose fission cross section is larger, by irradiation, and the uniforming of a power distribution is attained with one kind of fuel assembly.

9. 发明专利

JPH08248167A REACTOR EMERGENCY STOP SYSTEM 失效
公开(公告)号：JPH08248167A
公开(公告)日：1996-09-27
申请号：JP5534795
申请日：1995-03-15
申请人： TOSHIBA CORP
发明人： IIDA MASAAKI , ARIYOSHI MASAHIKO
IPC分类号： G21C9/02 , G21D3/04
摘要： PURPOSE: To safely stop a reactor when a pump trip occurs. CONSTITUTION: Primary system piping 4 is connected to the lower part side face of a reactor vessel 1 containing coolant 3 in a rector core 2, and a primary main pump 5 is coupled to the primary system piping 4. A drive motor 6 and a generator 7 are connected to the primary system main pump 5. An alternating and direct current transformer 8 is connected to the generator. The reactor core is controlled so that a control rod 11 may be taken out or inserted. A shield plug 9 is provided on the upper end opening of the reactor vessel 1, a control rod drive mechanism 10 is vertically set on the shield plug 9, and an extension pipe 12 is mounted on a scream magnet 13 of the control rod drive mechanism 10. The scream magnet 13 and an A/D converter are electrically connected to each other. The scream magnet is moved up and down by rotation of a ball screw 14.

10. 发明专利

JPH07191170A MINOR ACTINIDE BURNER REACTOR 失效
公开(公告)号：JPH07191170A
公开(公告)日：1995-07-28
申请号：JP33146893
申请日：1993-12-27
申请人： TOSHIBA CORP
发明人： IIDA MASAAKI
IPC分类号： G21C1/00 , G21C3/28 , G21C5/00 , G21F9/00
摘要： PURPOSE:To provide a minor actinide (MA) burner reactor which can consume MA with high efficiency, can operate for a long period stably. and is embodied in a simple structure. CONSTITUTION:Nitride of minor actinide extracted from a spent fuel is inserted in a metal cover pipe to form a MA type fuel 2 in pin shape, and a number of such fuel pins are arranged in ring form to constitute a reactor core 3. A neutron absorbing material 4 is arranged in the center opening of this core 3, and a reflector 5 is installed outside of the core 3. The core 3 is cooled by a cooling material made in sodium Na or lead Pb.

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