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11. 发明专利

JPH1010284A CLAD REMOVAL METHOD FOR SPENT NUCLEAR FUEL 失效
公开(公告)号：JPH1010284A
公开(公告)日：1998-01-16
申请号：JP15969896
申请日：1996-06-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： ANDO KIYOSHI , FUTAMI HIROSHI
IPC分类号： G21C19/34
摘要： PROBLEM TO BE SOLVED: To separate fuel pellets from clad by notching and loading a spent nuclear fuel rod and expanding the fuel pellets exposed out of the inside of the clad by oxidizing. SOLUTION: A plurality of reactor fuel rods 2 withdrawn out of a fuel assembly 1 are pinched with rollers 3, 3 from top and bottom and fuel pellets 2A inside the fuel rods 2 are crushed. Then, notches are given to the lined plural fuel rods 2 with a cutter 4 horizontally moving across the fuel rods 2. Then the notched fuel rods 2 are pinched with metal rods 5A, 5A with a square cross section and a metal rod 5B with a circular cross section (both arranged horizontally and intersecting the fuel rods 2) from top and bottom and load is added. By this, a plurality of cut fuel rods 6 are produced and fuel pellets 2A inside the clad 2B are exposed. These fuel rods 6 are heated in a temperature condition in which oxidation reaction of the clad 2B is negligible to expand the pellets 2A by oxidizing so that the pellets 2A and the clad 2B are separated.

12. 发明专利

JPH09292341A METHOD FOR ANALYZING HYDROGEN ISOTOPE 失效
公开(公告)号：JPH09292341A
公开(公告)日：1997-11-11
申请号：JP10705396
申请日：1996-04-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUTAMI HIROSHI
IPC分类号： G01N21/65 , G01N21/64
摘要： PROBLEM TO BE SOLVED: To provide the method, which can measure hydrogen isotopes even in the environment, wherein intense background light such as plasma is present. SOLUTION: In the method for analyzing hydrogen compound, which is present in the form of plasma and hydrogen molecules around the plasma, a dye laser 2 is excited by a YAG laser 1, and a light variable wavelength laser light is obtained. When the frequency of YAG laser light 9 is made to be ω1 are the frequency of dye laser light 10 is made to be ω2 , the difference between the frequency ω1 and the frequency ω2 of the laser light Δω=|ω1 -ω2 | is made to match the vibration energy of the hydrogen compound. The laser light is applied on the hydrogen compound. The coherent anti-Stoke's Raman scattering light generated when the laser light is applied on the hydrogen compound is detected. Thus, the concentration of the hydrogen isotope is measured.

13. 发明专利

JPH09166532A OXIDE FILM REMOVING METHOD 失效
公开(公告)号：JPH09166532A
公开(公告)日：1997-06-24
申请号：JP32458495
申请日：1995-12-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAUCHI MASAFUMI , FUTAMI HIROSHI
IPC分类号： G01N21/63 , G01N1/32
摘要： PROBLEM TO BE SOLVED: To remove an oxide film rapidly in a contactless state by irradiating an assay sample having the oxide film formed on the surface with pulse laser beams, and vaporizing the oxide film at the irradiated part to remove the oxide film. SOLUTION: A YAG laser 1 is oscillated in a Q-switch mode, and the optical axes of pulse laser beams 2 are changed by a prism 3. The laser beams 2 are converged by a converging lens 4 and cast on an assay sample 5. An oxide film at a part irradiated by the laser beams 2 is thereby vaporized and removed. After the removal of the oxide film, an analysis of metallic texture is made by a laser analysis method, for instance, a laser emission analysis method. A contactless and nondestructive analysis on the aged deterioration of high temperature equipment in an atomic power plant can thereby be made. Also, if an oxide film and a Cr lacking layer are removed by this oxide film removing method, a micro area of 1mm or less in diameter is removed to the depth of about 10μm, so that this method is easily applied also to a plant in operation.

14. 发明专利

JPH09121067A METHOD FOR CALIBRATING LASER WAVELENGTH 失效
公开(公告)号：JPH09121067A
公开(公告)日：1997-05-06
申请号：JP27737695
申请日：1995-10-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUTAMI HIROSHI
IPC分类号： H01S3/00 , H01S3/10
摘要： PROBLEM TO BE SOLVED: To provide a method for calibrating the laser wavelength in which the wavelength calibrating work can be relieved. SOLUTION: A discharge tube 6 encapsulating hydrogen atoms is irradiated with laser light from variable wavelength lasers 1, 2 and then the wavelength thereof is varied before measuring the optogalvano spectrum of two atomic beams of hydrogen atom at wavelengths Hα , Hβ . Assuming the wavelengths of variable wavelength lasers 1, 2 read out by a wavelength controller when a peak current flows through the discharge tube 6 are λα , λβ , the wavelength is calibrated according to a relation between the wavelength λ read out through the laser wavelength controller and a true wavelength λ1 .

15. 发明专利

JPH07260989A BREAKAGE DETECTING METHOD OF NUCLEAR FUEL 失效
公开(公告)号：JPH07260989A
公开(公告)日：1995-10-13
申请号：JP5580994
申请日：1994-03-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUTAMI HIROSHI
IPC分类号： G01N27/64 , G21C17/07
摘要： PURPOSE:To detect the breakage of a nuclear fuel accurately and rapidly, by detecting a radioactive fission product substance discharged in the Na of a coolant when the nuclear fuel generate a breakage, by a resonant sensitized ionization method. CONSTITUTION:A wavelength variable laser 2 oscillates a laser wave proper to the Cs by the excitation of an exciting laser 1. A part of such a laser beam is led in to a hollow cathode lamp 4 by a beam splitter 3, it is calibrated exactly by an optogalvano signal, and led in to an optical fiber 6 by a mirror 5. The laser beam is focused 9, and an ionizing scope 12, that is, the Cs existing in a space of the diameter within 5mm is ionized, and the conductivity is measured by electrodes 10 and 11 provided at both sides of the scope 12. That is, a positive voltage is applied to the electrode 10, the electrode 11 is earthed so as to prevent to receive the influence of the beta rays, the laser 2 emits two sorts of laser beams with up to 455.5nm, and up to 1058nm, and the Cs is ionized consonantly by the two laser beams. Consequently, the electric conductivity between the electrodes 10 and 11 is changed, and this change is detected as a signal.

16. 发明专利

JPH06308030A TURBINE ATMOSPHERIC GAS PURITY ANALYZER 失效
公开(公告)号：JPH06308030A
公开(公告)日：1994-11-04
申请号：JP10264693
申请日：1993-04-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUTAMI HIROSHI , ANDO KIYOSHI , MATSUGAMI MANABU , MATSUDA KEIICHI
IPC分类号： G01N21/64
摘要： PURPOSE:To highly accurately analyze atmospheric gas in order to prevent turbine corroding factor components from attaching by applying light having a wavelength matching an absorption wavelength of elements to be analyzed to atomized elements and measuring intensity of generated fluorescent light. CONSTITUTION:Sample vapor generated by vibration of a supersonic vibrator 2 provided on a vapor generator 1 is introduced into a frame 4 by a sample inlet tube 3. Pulse laser light from an excitation pulse laser 5 is split into two by a beam splitter 6 to be applied to dye lasers 8a, 8b, and laser light correctly matching an absorption wavelength of two elements to be analyzed is emitted. The laser light is focused on the same axis via a mirror 9 and a beam combiner 10 and applied onto the frame 4. Fluorescent light organically generated in the frame 4 is subjected to separation and removal of unnecessary wavelengths by a rotation of a disk-like interference filter 13 and then focused by a lens 12. Then it is converted into an electric signal proportional to fluorescent light intensity by a photomultiplier 15 and input to a computer 17.

17. 发明专利

JP2002181788A PHOTOIONIZATION MASS SPECTROMETER 失效
公开(公告)号：JP2002181788A
公开(公告)日：2002-06-26
申请号：JP2000383183
申请日：2000-12-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUTAMI HIROSHI
IPC分类号： G01N27/62 , G01N27/64 , G01N33/00 , H01J49/04 , H01J49/16 , H01J49/40
摘要： PROBLEM TO BE SOLVED: To provide a photoionization mass spectrometer by which dioxins in an exhaust gas can be directly analyzed in real time without a time delay. SOLUTION: The photoionization mass spectrometer is provided with a sample introduction means 15 by which the exhaust gas 13 from a gas duct 12 is continuously introduced into a vacuum chamber 11 as a leakage molecular beam 14, a laser irradiation means 18 by which a pulsed laser beam 16 at a phetomsecond or less as light having a wide spectral bandwidth is irradiated into the introduced leakage molecular beam 14 so as to generate molecular ions 17 and a time-of-flight mass spectrometer 19 which analyzes the generated molecular ions 17.

18. 发明专利

JP2002168428A COMBUSTION CONTROL METHOD AND SYSTEM OF COMBUSTION FURNACE 失效
公开(公告)号：JP2002168428A
公开(公告)日：2002-06-14
申请号：JP2000364039
申请日：2000-11-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： ABE MASATAKA , TAKATSUDO YASUHIRO , ARAOKA MAMORU , YAMASHITA ICHIRO , FUTAMI HIROSHI
IPC分类号： G01N27/62 , F23G5/00 , F23G5/50 , G01N27/64
摘要： PROBLEM TO BE SOLVED: To provide a combustion control system by directly measuring dioxins and the precursors in an exhaust gas exhausted from an incineration furnace in real time without time delay, and controlling combustion in the furnace based on the measurement result. SOLUTION: When controlling combustion in a combustion furnace 101, the combustion control system comprises a measuring device 106 for measuring at least two elements selected from dioxins precursor concentration 103 in a combustion exhaust gas 2, a dioxins molecule count number 104, and dioxins concentration 105, judgment equipment 107 for judging the contents of at least two elements selected from the dioxins precursor concentration 103 measured by the measuring device 106, the dioxins count number 104, and the dioxins concentration 105, and a control device 108 for controlling combustion by either of or the combination of the temperature in the combustion furnace 101, gas convection time in the furnace, and agitation force in the furnace, thus controlling the emission of dioxins.

19. 发明专利

JPH1038852A ISOTOPE EXCHANGE REACTION SPEED MEASURING METHOD 失效
公开(公告)号：JPH1038852A
公开(公告)日：1998-02-13
申请号：JP19734096
申请日：1996-07-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUTAMI HIROSHI
IPC分类号： G01N27/62 , G01N21/64 , G01N27/64
摘要： PROBLEM TO BE SOLVED: To enable an isotope exchange reaction speed to be measured by changing a sample gas to molecular beams, crossing or colliding them in a vacuum and measuring concentration of a reaction product as the result of an isotope exchange reaction. SOLUTION: H2 and D2 are filled in sample chambers 1 and 2, injected into vacuum chambers 3 and 4 through orifices, and widen radiantly. A part thereof is cut out by schemers 8 and 9, and molecular beams are formed. The molecular beams are crossed or collide with each other in a reaction chamber 5, and isotope exchange reaction is generated. Pressure in the reaction chamber 5 is set to approx. 10 Torr to prevent collision reaction of molecules in the molecular beams. This is measured by a ultra-high sensitivity measuring method such as resonance sensitizing multiple photon ionization method. Further, changing the pressures in the sample chambers 1 and 2 enables a speed of the molecule beams to be changed and a molecule motion energy to be changed. As a result, motion energy dependency of the isotope exchange reaction can be obtained.

20. 发明专利

JPH1019851A ANALYSIS METHOD OF COOLANT OF LIGHT WATER REACTOR 失效
公开(公告)号：JPH1019851A
公开(公告)日：1998-01-23
申请号：JP17609196
申请日：1996-07-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUTAMI HIROSHI
IPC分类号： G01N27/64 , G21C17/02
摘要： PROBLEM TO BE SOLVED: To lower expense by irradiating a coolant of a light water reactor with a laser light matching an absorption wavelength of an atom or the like existing in a chemical flame after the introduction of the coolant of the light water reactor into the chemical flame to eliminate the need for flexibly using a plurality of analyzers according to purposes. SOLUTION: When a coolant of a light water reactor is sampled to be introduced into an oxygen/acetylene flame (chemical frame), an oxide or hydroxide of a metal element is excited in the flame to generate an isolated metal atom. At this point, when a laser wave is irradiated with a wavelength matching an absorption wavelength of the metal atom, the metal atom absorbs the laser light to be transited to an electron excited state and finally, is ionized. Chemical species existing in the coolant is analyzed by detecting the ions thus obtained. In other words, the laser light is made to irradiate the oxygen/acetylene flame 5 by a prism 4 and a DC high voltage 8 is applied to an electrode 6. Then, current flowing between electrodes 6 and 7 is amplified by a preamplifier 9 and detected by a digital oscilloscope 10.

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