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1. 发明专利

JPH07209483A CHEMICAL REPROCESSING METHOD OF SPENT FUEL 失效
公开(公告)号：JPH07209483A
公开(公告)日：1995-08-11
申请号：JP460194
申请日：1994-01-20
申请人： TOSHIBA CORP
发明人： SHOJI YUICHI , MIZUGUCHI KOJI , NITSUTOU KOUICHI , KOBAYASHI TSUGUYUKI
IPC分类号： G21C19/44 , C22B60/00
摘要： PURPOSE:To perform a significantly simplified chemical reprocessing by reducing UO2 in a spent fuel into U by high temperature metallurgy using no aqueous solution, separating the U from other components in the form of metal, condensing it as it is the metal by atomic laser, and further oxidizing it to provide UO2. CONSTITUTION:After a spent fuel 30 is decladded and pulverized 31, the reduction 32 of UO2 is carried out. A fission product FP is contained in the fuel 30 other than U, and alkali metal, alkali earth metal, rare metal, and transuranic element TRU are contained in the FP. After the reduction 32 of the oxide, the FP is subjected to extraction separation 33 to separate U from the FP 38 such as TRU and noble metals. After condensed 34 by laser, U is formed into UO2 by oxidation 35 of metal uranium. The resulting UO3 is subjected to fuel manufacture 36 to provide UO2 pellets 37. On the other hand, the separated 33 FP 38 such as TRU and noble metal is distilled 40 after extraction and separation 39 of TRU to provide TRU metal 41.

2. 发明专利

JPH06204623A COLORING-MATTER-SOLUTION CIRCULATING APPARATUS 失效
公开(公告)号：JPH06204623A
公开(公告)日：1994-07-22
申请号：JP34906592
申请日：1992-12-28
申请人： TOSHIBA CORP
发明人： SHIBANO TAKAYUKI , NITSUTOU KOUICHI
IPC分类号： H01S3/213
摘要： PURPOSE:To provide the coloring-pattern-solution circulating apparatus, which keeps the density of the coloring matter of the coloring matter solution constant. CONSTITUTION:Coloring matter solution 22 in a coloring matter solution tank 21 is sent into a cell flow path 24 of a coloring matter cell 23 through a circulating pump 27. The coloring matter solution 22 from the cell flow path 24 is returned into the coloring matter solution tank 22 by way of a communicating pipe 26. The density of the coloring matter in the coloring matter solution 22 is measures with a coloring-matter-density detecting device 28. The measured data are sent into a coloring-matter-concentration controller 29. The data are compared with the preset values in the coloring-matter-density controller 29. The required amount of the coloring matter or amount of solvent is computed. The result of the computation is sent into a coloringmatter-density regulating device 30. The coloring-matter-density regulating device 30 adds the required amount of the coloring matter or the solvent into the coloring matter solvent 22. Thus, the density of the coloring matter of the coloring matter solution 22 is kept constant.

3. 发明专利

JPH06181358A LASER CONTROL DEVICE 失效
公开(公告)号：JPH06181358A
公开(公告)日：1994-06-28
申请号：JP6869193
申请日：1993-03-26
申请人： TOSHIBA CORP
发明人： NITSUTOU KOUICHI , YOSHIDA TADASHI , MUKAI SHIGEHIKO , NAKAHARA KATSUHIKO , SHIBANO TAKAYUKI
IPC分类号： H01S3/0947 , G02F1/03 , H01S3/13
摘要： PURPOSE:To provide a laser control device which enhances laser in utilization factor by a method wherein laser is corrected and compensated in quality by monitoring a part of laser and then effectively and efficiently used again. CONSTITUTION:A laser control device is provided to enable laser changed in qualities such as wave front, intensity, and polarization as traveling through a reaction medium 14 to recover its initial qualities or to become optimal in qualities for following propagation. An optical module 25 composed of a laser amplifying device 31 which compensates laser inputted into a reaction medium in intensity for loss, a light monitoring system 28 monitors laser in quality sampling a part of laser, and a transmission type compensation optical system 33 which regulates, controls, and compensates laser in quality basing on the data of laser quality detected by the light monitoring system 28 is provided.

4. 发明专利

JPH01232789A DYE LASER CIRCULATING DEVICE 失效
公开(公告)号：JPH01232789A
公开(公告)日：1989-09-18
申请号：JP5962488
申请日：1988-03-14
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： NITSUTOU KOUICHI , YOSHIDA NORIMASA
IPC分类号： H01S3/213 , H01S3/02
摘要： PURPOSE:To remove only a deteriorated dye and use an organic solvent cyclically by a method wherein not only a dye concentration detector is provided to a medium feed circuit for a pigment laser device but also a dye removing filter and a circuit which bypasses the filter, which are connected with each other in parallel, are provided to a circulating circuit. CONSTITUTION:When the detected result of a laser medium which flows through a feed circuit 3 by a dye concentration detector 8 is more than a certain value, a control valve of a bypass circuit 10 is opened, and on-off valves of dye filters 9a and 9b and a control valve of a concentrated dye laser medium tank 15 are closed. Thereby, the laser medium returned from a dye laser device 1 is made to return to a tank 2 through the circuit 10. When the detected result obtained by the detector 8 is less than a certain value, the valve of the circuit 10 is closed and a switch valve 14, an on-off valve of either of the filters 9a and 9b, and the control valve of the tank 15 are opened. By these processes, the laser medium returned from the device 1 is guided to the filters 9a and 9b, the deteriorated dye is caught by the filters 9a and 9b, and the medium is made to return to the tank 2 and a concentrated laser medium is supplied to the tank 2 from the tank 15.

5. 发明专利

JPH11258350A NON-CONTACT SURFACE CONTAMINATION INSPECTION DEVICE AND METHOD 失效
公开(公告)号：JPH11258350A
公开(公告)日：1999-09-24
申请号：JP5694298
申请日：1998-03-09
申请人： TOSHIBA CORP
发明人： FUKAZAWA TAKUJI , NITSUTOU KOUICHI
IPC分类号： G01T1/169
摘要： PROBLEM TO BE SOLVED: To provide a non-contact surface contamination inspection device and method for inspecting surface contamination without contact and without damaging a paint film that is painted on a base material to be inspected and a surface to be inspected, for reducing such secondary waste as a filter and a filter where a contaminant as seen in a conventional contamination inspection adheres to, and for preventing a contamination area from spreading. SOLUTION: A contaminant 3 adhering to the surface of an inspection target 2 is allowed to leave the inspection target 2 in the form of fine particles due to the application of laser beams from a laser beam application means 4, the eliminated contaminant 3 is directly captured by a solid capturing member 18, radiation that is emitted from the captured contaminant 3 is measured by a radiation measuring means 20, the surface contamination site and the surface contamination density of the inspection target 2 are inspected without any contact, and the contaminant 3 adhering to the capturing member 18 is allowed to leave by a capturing member reproduction means 24 for reproducing the capturing member 18 after the measurement of radiation is completed.

6. 发明专利

JPH08323153A SEPARATION OF GADOLINIUM OR ZIRCONIUM ISOTOPE AND APPARATUS THEREFOR 失效
公开(公告)号：JPH08323153A
公开(公告)日：1996-12-10
申请号：JP13830395
申请日：1995-06-05
申请人： TOSHIBA CORP
发明人： WATANABE JUNKO , NITSUTOU KOUICHI , TANAZAWA TAKESHI
IPC分类号： B01D59/34 , H01S3/03
摘要： PURPOSE: To improve the efficiency of separating odd nuclear isotope, such as 157Gd or 91Zr, which is the isotope to be enriched from even nuclear isotope by exciting the most of the target isotope to an upper level by adiabatic inversion excitation by irradiation of metal vapor flow with a laser beam and expelling the resonance excitation of the non-target isotope. CONSTITUTION: The metal vapor flow is first irradiated with the pulse laser beam subjected to frequency sweeping so as to cover all of the resonance light absorption lines of the odd nuclear isotope including the resonance absorption lines of the even nuclear isotope. After both these isotopes are once subjected to adiabatic inversion excitation to the first stage excitation level, the resonance light absorption line of only the even nuclear isotope is irradiated with the pulse laser beam subjected to frequency sweeping, by which only the even nuclear isotope is dropped from the first stage excitation level to the base level. Only the odd nuclear isotope remaining in the first excitation level is excited and ionized by the further irradiation with the laser beam. As a result, only the odd nuclear isotope which has an ultrafine structure and is hardly excited is efficiently selectively excited.

7. 发明专利

JPH07116476A METHOD AND APPARATUS FOR SEPARATING GADOLINIUM ISOTOPE 失效
公开(公告)号：JPH07116476A
公开(公告)日：1995-05-09
申请号：JP26728793
申请日：1993-10-26
申请人： TOSHIBA CORP
发明人： IKEHARA TADASHI , NITSUTOU KOUICHI , HIDA KAZUTAKA
IPC分类号： B01D59/34 , H01S3/00
摘要： PURPOSE:To decrease the content of an isotope to be depleted by a method in which a vapor flow is irradiated with pulse laser beams the frequencies of which are curtailed focusing the resonance absorption line of the isotope to be depleted on the ground and quasi-stable levels to induce adiabatic reverse excitation and then pulse laser beams for excitation and ionization to excite the isotope selectively to be recovered by ionization. CONSTITUTION:A vapor flow is generated by heating a Gd raw material containing more than one isotope. The vapor flow is irradiated with pulse laser beams which excite and ionize selectively a specified isotope, and the ionized specified isotope is recovered. In this process, the vapor flow is irradiated with pulse laser beams 10a-10c the frequencies of which are curtailed focusing the resonance absorption line of the isotope to be depleted (Gd 156 and/or Gd 158) on the ground level 34 and quasi-stable levels 35, 36 to induce adiabatic reverse excitation and then pulse laser beams 10d, 10e for excitation and ionization to excite and ionize selectively the isotope to be recovered. In this way, the content of the isotope to be depleted is reduced in comparison with that of natural gadolinium.

8. 发明专利

JPH0722681A MULTIPLE MODE MODULATION LASER SYSTEM 失效
公开(公告)号：JPH0722681A
公开(公告)日：1995-01-24
申请号：JP15945793
申请日：1993-06-29
申请人： TOSHIBA CORP
发明人： NITSUTOU KOUICHI , SHIBANO TAKAYUKI , NAKAHARA KATSUHIKO
IPC分类号： G02F1/33 , H01S3/10
摘要： PURPOSE:To provide a multiple mode modulation laser system wherein zero- order light and first-order diffraction light are coaxially synthesized and a polarization surface of both is made uniform. CONSTITUTION:The multiple mode modulation laser system infects laser beam oscillated from a single mode laser device 1 into an AOM 3 of an acoustic optical system 5 through a polarization beam splitter 2. Zero-order light and first-order diffraction light are projected from the AOM 3. The projected zero- order light and first-order diffraction light are reflected by optical mirrors 8, 9 of a reflection optical system 10 and are injected again into the AOM 3 through lambda/4 wavelength plates 6, 7. Thereby, zero-order light and first-order diffraction light are coaxially synthesized and a polarization surface of both is uniform. The zero-order light and first-order diffraction light are refracted at right angles by the polarization beam splitter 2 and taken out.

9. 发明专利

JPH03196818A LASER DEVICE FOR SEPARATING ISOTOPE 失效
公开(公告)号：JPH03196818A
公开(公告)日：1991-08-28
申请号：JP33653689
申请日：1989-12-27
申请人： TOSHIBA CORP
发明人： NITSUTOU KOUICHI
IPC分类号： B01D59/34 , H01S3/00 , H01S3/117
摘要： PURPOSE:To improve efficiency in utilizing energy of a laser beam by setting the wavelength level of each laser beam split by a beam splitter in conformity to each resonance absorption line of a hyperfine structure by frequency modulation of an acoustooptical element. CONSTITUTION:The isotopic raw material in a photoreactive cell 7 is irradiated with the laser beam L oscillated by a single mode or multimode to excite only the isotope to be separated and recovered. In this case, the oscillated laser beam L is split into plural split laser beams l1-ln by beam splitters S0, S1-Sn. Furthermore, the split laser beams l1-ln are shifted to the wavelength level corresponding to the resonance absorption line of a hyperfine structure present in the isotope atom to be separated by plural acoustooptical elements a1-an. Consequently, the isotope can be excited on all the hyperfine structure levels, and efficiency in utilizing energy of the laser beam is drastically improved.

10. 发明专利

JPH1137799A STATUS MONITORING DEVICE 失效
公开(公告)号：JPH1137799A
公开(公告)日：1999-02-12
申请号：JP21124597
申请日：1997-07-23
申请人： TOSHIBA CORP
发明人： NITSUTOU KOUICHI , YODA MASAKI , MAEKAWA TATSUYUKI
IPC分类号： G01D5/353 , G01B11/00 , G01D5/26 , G02B6/00 , G05B23/02
摘要： PROBLEM TO BE SOLVED: To transmit signals from a multi-point sensor with a single optical fiber, by photo-detecting the light from an object to be monitored, shifting the wavelength, transferring with the optical fiber, and judging the status of the object to be monitored based on the transferred light. SOLUTION: An object to be monitored 2 is irradiated with the light from a light source 1, the light from the object to be monitored 2 is photo-detected with a photo-detection signal transmission mechanism 3, and its wavelength is shifted. The light wherein wavelength is shifted is transferred to a judging part 5 through an optical fiber 4, and based on the transferred light, the status of the object 2 is judged to monitor the object 2. The optical fiber 4 comprises a core part for transferring optical signal and a clad part of reflection material, one of which is doped with a pigment for laser for forming the photo-detection signal transmission mechanism 3, for a detected wavelength to be converted into another wavelength. Relating to the pigment for laser, internal absorption wavelength is different from light-emission wavelength, so, one with such characteristics as causing no self-absorption, among the pigments for laser is doped. With this structure, the single optical fiber 4 is provided with multiple detecting mechanisms.

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