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91. 发明专利

JPH06214095A OFFGAS TREATMENT FACILITY, IODINE ABSORBENT, AND THEIR MANUFACTURE 失效
公开(公告)号：JPH06214095A
公开(公告)日：1994-08-05
申请号：JP591993
申请日：1993-01-18
申请人： HITACHI LTD
发明人： KONDOU YOSHIKAZU , SUGIMOTO YOSHIKAZU , FUKAZAWA TETSUO , KAWAMURA FUMIO , FUNABASHI KIYOMI , MIURA NOBORU
IPC分类号： B01D53/68 , B01D53/04 , G21F9/02 , B01D53/34
摘要： PURPOSE:To highly efficiently separate and remove iodine even under severe conditions of non-coexistance of NOX and an extremely high humidity in an offgas treatment facility, an iodine adsorbent, and their manufacture. CONSTITUTION:An iodine adsorbent 24 impregnated with two kinds or more silver compounds is charged in the adsorption tower of an offgas treatment facility. As the silver compounds, at least one kind each of an easily soluble silver compound and a hardly soluble silver compound is used. For example, in the inner part of the pore 4 of an activated alumina 3 which is the carrier of the iodine adsorbent 24, silver nitrate 1 having a porous structure and metal silver 2 are impregnated in laminated form. By working them as the adsorbent in this structure, both peeling of the impregnated silver and reduction in the removing efficiency of organic iodide can be suppressed. A relatively large quantity of silver can be impregnated in the iodine adsorbent.

92. 发明专利

JPH05215891A SOLVENT FOR REPROCESSING 失效
公开(公告)号：JPH05215891A
公开(公告)日：1993-08-27
申请号：JP2095392
申请日：1992-02-06
申请人： HITACHI LTD
发明人： BABA TSUTOMU , FUKAZAWA TETSUO , KAWAMURA FUMIO
IPC分类号： G21C19/46 , G21F9/06
摘要： PURPOSE:To reduce the elimination frequency of decomposed products and the quantity of a spent-extracted solvent by forming the extracted solvent of a three-component group of TBP/alkane/polar organic solvent. CONSTITUTION:Spent nuclear fuel is led into a feed liquid adjusting process 2 through a dissolving process 1. In the process 2, pH is adjusted to approximately 2.5 in order to obtain the tetravalent form easiest to extract Pu. An extracted solvent adjusted in such a way that the volume ratio of TBP/dodecane/benzene is 3:6:1, for instance, in a solvent adjusting drum 7 is led into a decontamination process 3. In the process 3, 99% or more of a fission product are separated/ removed from U and Pu. An organic polar solvent concentration monitor 8 for monitoring the volume ratio of TBP/dodecan/benzene is installed in a line from the adjusting drum 7 to the process 3. A reducing agent is led into a U-Pu separating process 4. U and Pu are then led into a U and Pu purifying process 6, and the whole spent solvent is led into a solvent cleaning process 5.

93. 发明专利

JPH0534497A PROCESS OF RADIOACTIVE WASTE LIQUID 失效
公开(公告)号：JPH0534497A
公开(公告)日：1993-02-09
申请号：JP19521391
申请日：1991-08-05
申请人： HITACHI LTD
发明人： NISHI TAKASHI , BABA TSUTOMU , FUKAZAWA TETSUO , MATSUDA MASAMI , CHINO KOICHI , IKEDA TAKASHI
IPC分类号： G21F9/06 , G21F9/12
摘要： PURPOSE:To absorb and remove nucleide at high decontamination factor out of an alkaline radioactive waste liquid including positive ion nuclide, without pretreatment operation. CONSTITUTION:Compound having siloxane combination comprising silicon and oxygen, and silanol base comprising silicon, oxygen and hydrogen, or an inorganic material chiefly composed of aluminosilicate comprising silicon, oxygen and aluminium, is used for an absorber, while an alkaline waste liquid is directly passed through water in an absorption device 1 filled in with the absorber, and radioactive nuclide included in the liquid is absorbed and is thus removed.

94. 发明专利

JPH0527090A SEPARATION OF RADIOACTIVE NUCLEUS OBTAINED FROM REPROCESSED HIGH LEVEL WASTE LIQUID 失效
公开(公告)号：JPH0527090A
公开(公告)日：1993-02-05
申请号：JP18226391
申请日：1991-07-23
申请人： HITACHI LTD
发明人： FUKAZAWA TETSUO , NAKAMURA TOMOTAKA , SASAHIRA AKIRA
IPC分类号： G21C19/46 , G21F9/06 , G21F9/10
摘要： PURPOSE:To separate the radioactive nuclei in a simple manner at a low cost by separating the insoluble salt generated by the addition of the substance for forming the insoluble salt with the nuclei which exist in a waste liquid, from a high level waste liquid. CONSTITUTION:The waste liquid containing the radiactive nucleus such as Cs, Sr, Ru, Sb, Np, and Am supplied from a reprocessing high level waste liquid feeding tank 2 is reacted with the phosphoric acid supplied from a phosphoric acid feeding tank 3, in a reaction tank 1, and the insoluble phosphomolybdic acid and barium phosphate are formed in the waste liquid. Both adsorb Cs, Sr, and transuranic elements. After the precipitate sufficiently grows, the waste liquid is transferred into a solid/liquid separating mechanism 5 by a slurry transfer pump 4, and separated into the precipitate phase and the waste liquid phase. The waste liquid phase is transferred to a processed waste liquid storage tank 7, and the rest precipitate is transferred to a precipitate storage tank 8 from the mechanism 5 by the back-wash liquid supplied from a back-wash liquid feeding tank 6. Through this process, Cs, Sr, and transuranic elements can be separated from other kinds of nuclei.

95. 发明专利

JPH0481683A METHOD AND APPARATUS FOR DETECTING TRANSURANIUM ELEMENT 失效
公开(公告)号：JPH0481683A
公开(公告)日：1992-03-16
申请号：JP19491890
申请日：1990-07-25
申请人： HITACHI LTD
发明人： FUKAZAWA TETSUO
IPC分类号： G01T1/167
摘要： PURPOSE:To simply detect transuranium elements with relatively high sensitivity by measuring radioactive rays emitted by fission product produced by spontaneous fission of transuranium elements. CONSTITUTION:A vessel 2 for permitting a transuranium element containing substance to be sealed serves to capture spontaneous fission product (especially in gaseous state), while a radioactive ray detector 3 provided in the vessel measures radioactive rays emitted from the captured fission product. By transferring the fission product from the first vessel 2 which can seal the transuranium element containing substance to a second vessel 10, interference of gamma rays due to other nuclear species in the substance can be avoided, so that it is possible to detect transuranium elements at higher sensitivity.

96. 发明专利

JPS6365918B2 失效
公开(公告)号：JPS6365918B2
公开(公告)日：1988-12-19
申请号：JP13016382
申请日：1982-07-26
申请人： HITACHI LTD
发明人： FUKAZAWA TETSUO , KAWAMURA FUMIO , KIKUCHI JUN
IPC分类号： G21F9/16 , B09B3/00 , G21F9/00 , G21F9/30

97. 发明专利

JPS62239051A METHOD AND INSTRUMENT FOR MEASURING CONCENTRATION OF METAL 失效
公开(公告)号：JPS62239051A
公开(公告)日：1987-10-19
申请号：JP8206186
申请日：1986-04-11
申请人： HITACHI LTD
发明人： FUKAZAWA TETSUO , UETAKE NAOTO , NISHI TAKASHI , OZAWA YOSHIHIRO
IPC分类号： G21C19/46 , G01N1/28 , G01N1/36 , G01N21/27 , G01N21/78 , G01N31/00
摘要： PURPOSE:To measure the concn. of a metal with high sensitivity and high accuracy b irradiating an electromagnetic wave in the presence of a semiconductor photocatalyst, etc., to a soln. to unite the valency of the measuring metal in the soln., then making measurement. CONSTITUTION:A sample 1 contg. Ru in a retreated soln. is fed to a vessel 10 and photocatalyst+hydrogen peroxide 2 are fed to a vessel 10 in the measurement of, for example, the concn. of Ru. Visible light or UV light is projected from a light source 7 to the sample 1 through a quartz window 5. The photocatalyst generates excited electrons and holes and reduces Ru and Ru to the state of RuNO(NO3). After the photocatalyst is settled, the light is projected from the light source 7. A light absorption value is determined by a detector 9 from the transmitted light thereof and the concn. of Ru is measured. Valencies are united to one and the interference of the absorption peak is eliminated in the above-mentioned manner and therefore, the concn. of the metal is measured with the high sensitivity and the concn. of Ru is measurable with the high accuracy up to 0.01g/l.

98. 发明专利

JPS61277096A PROCESSING OF RADIOACTIVE WASTE 失效
公开(公告)号：JPS61277096A
公开(公告)日：1986-12-08
申请号：JP11882385
申请日：1985-06-03
申请人： HITACHI LTD
发明人： UETAKE NAOTO , FUKAZAWA TETSUO
IPC分类号： G21F9/30 , G21F9/34 , G21F9/36

99. 发明专利

JPS61178698A METHOD OF HARDENING WATER GLASS 失效
公开(公告)号：JPS61178698A
公开(公告)日：1986-08-11
申请号：JP2058985
申请日：1985-02-05
申请人： HITACHI LTD
发明人： FUKAZAWA TETSUO , IZUMIDA TATSUO , NEMOTO TSUNEO
IPC分类号： G21F9/30 , G21F9/00 , G21F9/16 , G21F9/36

100. 发明专利

JPS60202400A METHOD OF DECONTAMINATING CONCRETE 失效
公开(公告)号：JPS60202400A
公开(公告)日：1985-10-12
申请号：JP5830484
申请日：1984-03-28
申请人： HITACHI LTD
发明人： FUKAZAWA TETSUO , UETAKE NAOTO , KAWAMURA FUMIO
IPC分类号： G21F9/28 , G21F9/00 , G21F9/30

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