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1. 发明专利

JPH0740057A METHOD AND DEVICE FOR EXECUTING GAS SEAL WELDING OF NUCLEAR FUEL ROD 失效
公开(公告)号：JPH0740057A
公开(公告)日：1995-02-10
申请号：JP18399693
申请日：1993-07-26
申请人： DORYOKURO KAKUNENRYO , KAWASAKI HEAVY IND LTD , DENGENSHA MFG CO LTD
发明人： SEKI MASAYUKI , NISHIYAMA MOTOKUNI , KAMIMURA KATSUICHIRO , YAGI EIJI , NAKASE TAKESHI , OBOKATA SADAO , TANIGUCHI JUNICHI , UESUGI KISAKU
IPC分类号： B23K11/00 , B23K11/14 , B23K11/24 , B23K11/36 , G21C21/02
摘要： PURPOSE:To realize the high precision of welding by making use of the projection welding to eliminate the slip when an electrode is pressed. CONSTITUTION:An end plug W1 to be welded by a movable side electrode 2 and a fixed side electrode 3 and a coated tube W2 are held in a butted, manner, the end part held in a butted manner is surrounded in an air-tight manner, the air sucked from the surrounded butt end part, the prescribed vacuum condition is held in the coated tube, and gaseous He is filled in the vacuum coated tube, and then, the end plug is pressure welded to the coated tube by giving the pressure and the welding current required for the welding to the butt end part to seal gaseous He in the coated tube. When the slip is generated between the electrode and the work during the pressure welding, the displacement by pressure is detected and the charge-starting work is stopped to preliminarily prevent the defective welding.

2. 发明专利

GB2258340B Fuel rod for nuclear reactor 未知
公开(公告)号：GB2258340B
公开(公告)日：1994-10-05
申请号：GB9214804
申请日：1992-07-13
申请人： DORYOKURO KAKUNENRYO
发明人： KAMIMURA KATSUICHIRO , KAWATA NORIO , VITANZA CARLO
IPC分类号： G21C3/28 , G21C3/18 , G21C3/326
摘要： A fuel rod for nuclear reactors which contains UO2 or a mixed-oxide (MOX) of UO2 and PuO2 as a nuclear fuel and a combustible reactivity control material e.g., Gd2O3. A plurality of hollow UO2 or MOX pellets each having a hole along its central axis are spitted with a long bar of Gd2O3 to form a pellet stack, which is inserted and sealed in a cladding tube to form the fuel rod of the present invention. Since the Gd2O3 bar can be manufactured in a non-nuclear fuel manufacturing facility, it is not required to provide two separate lines, i.e., a line for handling Gd2 O3 and a line for handling UO2 or MOX fuel, in one manufacturing facility. The optimum design for the performance of the nuclear fuel is possible by changing the diameter and/or Gd2O3 concentration of the Gd2O3 bar depending on the desired performance of the nuclear fuel.

3. 发明专利

FR2679369B1 未知
公开(公告)号：FR2679369B1
公开(公告)日：1995-03-03
申请号：FR9208604
申请日：1992-07-10
申请人： DORYOKURO KAKUNENRYO
发明人： KAMIMURA KATSUICHIRO , KAWATA NORIO , VITANZA CARLO
IPC分类号： G21C3/28 , G21C3/18 , G21C3/326 , G21C3/16
摘要： A fuel rod for nuclear reactors which contains UO2 or a mixed-oxide (MOX) of UO2 and PuO2 as a nuclear fuel and a combustible reactivity control material e.g., Gd2O3. A plurality of hollow UO2 or MOX pellets each having a hole along its central axis are spitted with a long bar of Gd2O3 to form a pellet stack, which is inserted and sealed in a cladding tube to form the fuel rod of the present invention. Since the Gd2O3 bar can be manufactured in a non-nuclear fuel manufacturing facility, it is not required to provide two separate lines, i.e., a line for handling Gd2 O3 and a line for handling UO2 or MOX fuel, in one manufacturing facility. The optimum design for the performance of the nuclear fuel is possible by changing the diameter and/or Gd2O3 concentration of the Gd2O3 bar depending on the desired performance of the nuclear fuel.

4. 发明专利

GB2258340A FUEL ROD FOR NUCLEAR REACTOR 未知
公开(公告)号：GB2258340A
公开(公告)日：1993-02-03
申请号：GB9214804
申请日：1992-07-13
申请人： DORYOKURO KAKUNENRYO
发明人： KAMIMURA KATSUICHIRO , KAWATA NORIO , VITANZA CARLO
IPC分类号： G21C3/28 , G21C3/18 , G21C3/326
摘要： A fuel rod for nuclear reactor comprises a plurality of annular UO2 or MOX fuel pellets 1 threaded into a long bar 2 of burnable poison material such as Gd2O3 to form a pellet stack, which is inserted and sealed in a cladding tube 4. The Gd2O3 bar can be manufactured in a non-nuclear fuel manufacturing facility. The optimum design for the performance of the nuclear fuel is possible by changing the diameter and/or Gd2O3 concentration of the Gd2O3 bar. A fuel assembly (fig 4, not shown) comprises an outer ring of fuel rods as described above surrounding two inner rings of fuel rods not containing burnable poison.

5. 发明专利

DE4223126A1 未知
公开(公告)号：DE4223126A1
公开(公告)日：1993-01-21
申请号：DE4223126
申请日：1992-07-14
申请人： DORYOKURO KAKUNENRYO
发明人： KAMIMURA KATSUICHIRO , KAWATA NORIO , VITANZA CARLO
IPC分类号： G21C3/28 , G21C3/18 , G21C3/326
摘要： A fuel rod for nuclear reactors which contains UO2 or a mixed-oxide (MOX) of UO2 and PuO2 as a nuclear fuel and a combustible reactivity control material e.g., Gd2O3. A plurality of hollow UO2 or MOX pellets each having a hole along its central axis are spitted with a long bar of Gd2O3 to form a pellet stack, which is inserted and sealed in a cladding tube to form the fuel rod of the present invention. Since the Gd2O3 bar can be manufactured in a non-nuclear fuel manufacturing facility, it is not required to provide two separate lines, i.e., a line for handling Gd2 O3 and a line for handling UO2 or MOX fuel, in one manufacturing facility. The optimum design for the performance of the nuclear fuel is possible by changing the diameter and/or Gd2O3 concentration of the Gd2O3 bar depending on the desired performance of the nuclear fuel.

6. 发明专利

JP2535284B2 失效
公开(公告)号：JP2535284B2
公开(公告)日：1996-09-18
申请号：JP10617492
申请日：1992-03-31
申请人： DORYOKURO KAKUNENRYO KAIHATSU JIGYODAN , KAWASAKI JUKOGYO KK , DENGENSHA SEISAKUSHO KK
发明人： SEKI MASAYUKI , NISHAMA MOTOKUNI , KAMIMURA KATSUICHIRO , NAKASE TAKESHI , OBOKATA SADAO , TANIGUCHI JUNICHI
IPC分类号： B23K11/00 , B23K11/14 , B23K37/04

7. 发明专利

JPH0519078A FUEL ROD FOR REACTOR 失效
公开(公告)号：JPH0519078A
公开(公告)日：1993-01-26
申请号：JP17373191
申请日：1991-07-15
申请人： DORYOKURO KAKUNENRYO
发明人： KAMIMURA KATSUICHIRO , KAWATA TOKUO , KARURO BITANZA
IPC分类号： G21C3/28 , G21C3/18 , G21C3/326
摘要： PURPOSE:To obtain a fuel rod for a reactor using Gd-containing fuel which enables reduction of the cost of manufacture since manufacturing facilities can be simplified and also enables relaxation of nuclear and thermal limitations and, besides, unrestricted selection of the concentration of a burnable reactivity control substance, e.g. Gd2O3, in accordance with desired performance. CONSTITUTION:A fuel rod 10 is constructed in such a manner that a rod material 2 formed of a burnable reactivity control substance such as Gd2O3 is passed in a piercing manner through hollow parts of a plurality of hollow pellets 1 each having a hole along the central axis and constituted of UO2 or MOX, so as to form a pellet stack, and that this pellet stack is sealed in a cladding tube 4. Since the rod material constituted of the Gd2O3 can be manufactured in non-nuclear fuel manufacturing facilities, it is unnecessary to provide two discrete systems of a line handling the Gd2O3 and a line handling only the UO2 or the MOX in nuclear fuel manufacturing facilities, and thus the cost of manufacture of the fuel rod can be reduced. By changing the diameter of the rod material of the Gd2O3 and the concentration of it, besides, the design can be optimized in conformity with the performance of nuclear fuel. In addition, the excellent performance of the usual hollow pellet can be maintained as it is.

8. 发明专利

JPS5186695A 失效
公开(公告)号：JPS5186695A
公开(公告)日：1976-07-29
申请号：JP1100175
申请日：1975-01-28
申请人： DORYOKURO KAKUNENRYO
发明人： UEMATSU KUNIHIKO , KAMIMURA KATSUICHIRO , HIMENO YOSHIAKI , KANEKO HIROMITSU , ISHIBASHI HIDEKAZU
IPC分类号： G21C5/20 , G21C1/02 , G21C3/30 , G21C13/08

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