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1. 发明专利

JP2001296400A LIQUID METAL TARGET SYSTEM 失效
公开(公告)号：JP2001296400A
公开(公告)日：2001-10-26
申请号：JP2000121055
申请日：2000-04-17
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： HAYASHI KATSUMI , KASHIWAKURA JUN , NITAWAKI TAKESHI , OGAWA YUKIO
IPC分类号： G21F9/28 , G21K5/00 , G21K5/02 , G21K5/08
摘要： PROBLEM TO BE SOLVED: To provide an environment of a low radiation dose in maintenance and inspection work by a liquid metal target system that restrains the retention of adherends like oxides and other substances, containing radioactive substances, on the inside surface of piping. SOLUTION: A line 11 for controlling the concentration of oxygen is installed in connection with a surging tank 2 of the liquid metal target system, and a liquid metal whose oxygen concentration is lowered is circulated all over a cooling line before the maintenance and inspection work. After radioactive oxides and other substances that adhere and remain inside such equipment as a heat exchanger 4 in the cooling line and inside the piping are removed by being reduced and washed away in the previous process, they are drained to a drain tank 5. The drain tank 5 is located in a place away from other line equipment pipes or is shielded. Therefore, the radioactive oxides and other substances do not remain on the inside surface of the equipment and the piping when such an equipment as the heat exchanger 4 and the piping are maintained and inspected.

2. 发明专利

JPS62142901A STEAM GENERATOR 失效
公开(公告)号：JPS62142901A
公开(公告)日：1987-06-26
申请号：JP28292085
申请日：1985-12-18
申请人： HITACHI LTD
发明人： NITAWAKI TAKESHI , SHIBATA YOJI , NAKAO NOBORU
IPC分类号： F22B1/06

3. 发明专利

JP2012154861A Core of hybrid type nuclear reactor 审中-公开
标题翻译：混合型核反应堆核心
公开(公告)号：JP2012154861A
公开(公告)日：2012-08-16
申请号：JP2011015900
申请日：2011-01-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： FUJIMURA KOJI , NANBA KOJI , NITAWAKI TAKESHI , ITOOKA SATOSHI
IPC分类号： G21C5/00 , G21C1/02 , G21C1/30 , G21C5/18 , G21C15/28
CPC分类号： Y02E30/34
摘要： PROBLEM TO BE SOLVED: To sharply simplify the whole fuel cycle and to reduce a power generation unit cost of nuclear power generation.SOLUTION: A hybrid type nuclear reactor comprises: a neutron source area which loads depleted uranium, receives charged particle beams applied from the external and generates neutrons; and two reactors, i.e. a subcritical reactor which surrounds the neutron source area, uses a nitride of natural uranium or recovered uranium as a fuel and uses heavy water as a coolant and a moderator, and a fast reactor arranged adjacently to the subcritical reactor and loaded with a core fuel assembly which seals a nitride fuel of natural uranium, recovered uranium or depleted uranium into cladding tubes, bundles the cladding tubes in a wrapper tube, and allows liquid Na to flow among the cladding tubes upward to remove heat generated by nuclear fission.
摘要翻译：要解决的问题：大幅度简化整个燃料循环，并降低核电发电的发电单位成本。解决方案：混合型核反应堆包括：负载贫化铀的中子源区域，接收从外部施加的带电粒子束并产生中子; 和两个反应器，即围绕中子源区域的亚临界反应器，使用天然铀或回收铀的氮化物作为燃料，并使用重水作为冷却剂和调节剂，以及与亚临界反应堆相邻设置的快速反应器具有将天然铀的氮化物燃料，回收的铀或贫化铀密封在包层管中的核心燃料组件，将包层管包裹在包裹管中，并允许液体Na在包壳管中向上流动以除去核裂变产生的热量。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JPH02247596A FAST BREEDER 失效
公开(公告)号：JPH02247596A
公开(公告)日：1990-10-03
申请号：JP6798289
申请日：1989-03-20
申请人： HITACHI LTD
发明人： NITAWAKI TAKESHI , IKEUCHI TOSHIAKI , SHIBATA YOJI , NAKAO NOBORU
IPC分类号： G21C13/00 , G21C13/024
摘要： PURPOSE:To reduce thermal stress by providing a roof deck which is joined with the opening part at the upper part of a safe container to seal the opening part and cools the safe container while the safe container is suspended by the opening part, and separating the opening part from the roof deck. CONSTITUTION:The safe container 2 is fixed and suspended while having its upper end stored in the roof deck 4 having a cooling function, its inside is sealed, and the upper end of the container 2 is separated from the roof deck 4. An auxiliary cylinder 5 is suspended from the roof deck along the side wall internal surface of a nuclear reactor container 1 and reaches the primary sodium liquid stored in the container 1. Consequently, only the hydrostatic pressure by a sodium cooling material is applied to the container 1 and high stress by a reactor core, etc., and a steep temperature gradient generated in the container 1 due to heating from below and cooling from above can be evaded.

5. 发明专利

JPS6318295A FURNACE-WALL COOLING STRUCTURE OF FBR 失效
公开(公告)号：JPS6318295A
公开(公告)日：1988-01-26
申请号：JP16185686
申请日：1986-07-11
申请人： HITACHI LTD
发明人： NITAWAKI TAKESHI , SHIBATA YOJI , NAKAO NOBORU
IPC分类号： G21C15/12

6. 发明专利

JPS61181998A METHOD OF PREHEATING NUCLEAR REACTOR STRUCTURE 失效
公开(公告)号：JPS61181998A
公开(公告)日：1986-08-14
申请号：JP2131685
申请日：1985-02-06
申请人： HITACHI LTD
发明人： NITAWAKI TAKESHI , SHIBATA YOJI , NAKAO NOBORU
IPC分类号： G21D1/00 , G21D1/02

7. 发明专利

JPH0694866A BLANKET OF NUCLEAR FUSION REACTOR 失效
公开(公告)号：JPH0694866A
公开(公告)日：1994-04-08
申请号：JP24181092
申请日：1992-09-10
申请人： HITACHI LTD , JAPAN ATOMIC ENERGY RES INST
发明人： MAKI KOICHI , SHIBATA KEIICHIRO , AMADA TATSUO , OZAWA YOSHIHIRO , UDA TATSUHIKO , OTSUKA MICHIO , NITAWAKI TAKESHI , YOSHIDA HIROSHI , ENOEDA MIKIO , TAKATSU HIDEYUKI
IPC分类号： G21B1/13 , G21B1/00
摘要： PURPOSE:To obtain a blanket of a nuclear fusion reactor in which the influence to the heat transfer property owing to a thermal deformation can be reduced, the structure is simple, and the manufacture is easy. CONSTITUTION:A cooling material 3 of a blanket, and either a tritium breeding material 4 or a nutron doubling material 6 are filled in a blanket container 1, pipes in which a material other than the above materials is filled are installed in the blanket container 1, and furthermore, a structure in which the nutron doubling material 6 is placed between the cooling material 3 and the tritium beeding material 4 is adapted. The product is cooled through a specific thickness of nutron doubling material 6, and a temperature difference between the temperatures of the cooling material 3 and the tritium breeding material 4 has been obtained, and even though the thickness of the nutron doubling material 6 is changed owing to a thermal deformation, the influence to the heat transfer property is small. Since the blanket is composed as an assembly of pin type pipe group of duplex pipes at the best, the manufacture is easy.

8. 发明专利

JPH0327758A ANNULAR ELECTROMAGNETIC FLOW COUPLER 失效
公开(公告)号：JPH0327758A
公开(公告)日：1991-02-06
申请号：JP16202389
申请日：1989-06-23
申请人： HITACHI LTD , CENTRAL RES INST ELECT
发明人： NITAWAKI TAKESHI , SHIBATA YOJI , NAKAO NOBORU , IKEDA TAKASHI , AOYAMA GORO , HATTORI SADAO
IPC分类号： H02K44/00 , H02K44/06
摘要： PURPOSE:To effectively make the diametrical magnetic flux of an annular electromagnetic flow coupler and to realize miniaturization by using a superconductive coil for an electromagnetic coil, and sticking the superconductive material to prevent magnetic flux leakage to an iron core. CONSTITUTION:To miniaturize an annular electromagnetic flow coupler 1, a superconductive coil 21 is used for an electromagnetic coil 10. Moreover, to prevent the magnetic flux leakage between the magnetic poles of an outer iron core 9 attached to a safety vessel 3, superconductive material 22 is installed through insulating material 13 between the electromagnetic coil 10, consisting of superconductive coil 21, and the outer iron core 9. By the Meisner effect, the magnetic flux leakage between the magnetic poles can be prevented. Furthermore, by sticking superconductive materials 22 also to the end of the outer iron core 9 and the end of an inner iron core 8, attached to an inner tube 4, the magnetic flux leakage at the magnetic pole end can be prevented.

9. 发明专利

JPH01132996A REACTOR WALL COOLING STRUCTURE 失效
公开(公告)号：JPH01132996A
公开(公告)日：1989-05-25
申请号：JP28942487
申请日：1987-11-18
申请人： HITACHI LTD
发明人： NITAWAKI TAKESHI , SHIBATA YOJI , NAKAO NOBORU
IPC分类号： G21C15/02 , G21C15/12
摘要： PURPOSE:To set liquid level difference of the inner and the outer parts of an overflow part in a previously proper range by providing a cylindrical middle weir in an inclination on the halfway of a cylindrical reactor wall cooling structural wall whose side wall is set inclined. CONSTITUTION:Cold sodium introduced through a sodium introducing piping 1 from a high pressure plenum is agitated in a reactor wall cooling plenum 2 and flowed in a cooling passage formed of a reactor vessel 5 and a reactor wall cooling structural wall. Flowed-in sodium overflows the upper end part of the reactor wall cooling structural wall 3 as it is cooling the reactor vessel 5 to rise. Overflowing sodium is once stored in the middle weir 4 provided on the halfway of the reactor wall cooling structural wall 3 and further overflows to flow down to a cold pool 6. Either side wall of the reactor wall cooling structural wall 3 and the middle weir 4 is set inclined and the overflow is flowed down along the inclined wall. Therefore, the splash of the liquid can be prevented because the overflow is flowed down along the inclined wall without being directly flowed down on the liquid surface of the downstream.

10. 发明专利

JPS63121793A FAST BREEDER REACTOR 失效
公开(公告)号：JPS63121793A
公开(公告)日：1988-05-25
申请号：JP26759986
申请日：1986-11-12
申请人： CENTRAL RES INST ELECT , HITACHI LTD
发明人： HATTORI SADAO , NAKAO NOBORU , SHIBATA YOJI , NITAWAKI TAKESHI , IKEDA TAKASHI
IPC分类号： G21C15/00 , G21C1/02 , G21C15/02 , G21C15/14 , G21C15/24 , G21C15/247

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