Fundamental chemical study on the back end of nuclear fuel cycle, - University, JAERI cooperative research project-

核燃料循环后端的基础化学研究，-大学、JAERI合作研究项目-

• 批准号: 03303015
• 负责人: FURUYA Hirotaka
• 金额: $ 7.42万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03303015/
• 关键词: Transuranium Elements; TRU Cycle; Nuclear Fuel; Nuclear Waste; Reprocessing; Waste Disposal; Waste Glass; Geological Environment

The purpose of this study is to establish fundamental technologies on the back end of nuclear fuel cycle. This study consists of four sections; (1)Nuclear chemical study on TRU cycle (2)Solid state chemical study on nuclear fuel and waste (3)Chemical study on reprocessing (4)Chemical study on waste disposal. The summary for each section is described below.(1)For actinoids and lanthanoids, methods to measure nuclear structure, fission mechanism and fission yield were established, and some nuclear data were obtained. For Tc, cross section of (n,n')and(n,p) reactions were determined experimentally.(2)Thermodynamic properties and metallurgical properties of(U,Np) oxides were measured and diffusion mechanism of noble metals in UO_2 was determined experimentally. Mechanical properties of waste glass and durability of waste ceramics were studied experimentally.(3)Speciation of actinoids in water solution was studied experimentally. New ion-exchange resins and solvent extractions were applied to the separation of actinoids. Precision of calculation code for reprocessing was improved by refinement of basic factors in pulse column extraction.(4)Dissolution behavior of actinoids in groundwater and migration behavior of actinoids in geological environment was studied experimentally and theoretically. The effects of interaction with minerals, colloids and natural organic compounds on the migration was studied experimentally.

本研究的目的是建立核燃料循环后端的基础技术。本研究包括四个部分：（1）TRU循环的核化学研究（2）核燃料和废物的固态化学研究（3）后处理的化学研究（4）废物处置的化学研究。每一节的摘要如下所述。（1）对锕系和镧系元素建立了测量核结构、裂变机制和裂变产额的方法，获得了一些核数据。对于Tc，实验测定了（n，n '）和（n，p）反应截面。（2）测定了（U，Np）氧化物的热力学性质和冶金性质，并从实验上确定了贵金属在UO_2中的扩散机制。对废玻璃的力学性能和废陶瓷的耐久性进行了试验研究。（3）对水溶液中锕系元素的形态进行了实验研究。采用新型离子交换树脂和溶剂萃取法分离锕系元素。通过对脉冲柱萃取基本因素的细化，提高了后处理计算程序的精度。（4）从实验和理论上研究了锕系元素在地下水中的溶解行为和在地质环境中的迁移行为。实验研究了矿物、胶体和天然有机物的相互作用对迁移的影响。

项目成果

K.Nishizawa: "Zinc Isotope Effects in Complex Formation with a Crown Ether" Solvent Extraction and Ion Exchange. 11. (1993)

K.Nishizawa：“冠醚复合物形成中的锌同位素效应”溶剂萃取和离子交换。

M.Maeda: "Ruthenium Behavior in Submerged Combustion Process for Treatment of Spent Solvent" Proc.of the 3rd Int.Conf.on Nuclear Fuel Reprocessing and Waste Management(RECOD'91). 775-780. (1991)

M.Maeda：“处理废溶剂的浸没燃烧过程中的钌行为”Proc.of the 3rd Int.Conf.on Nuclear Fuel Reprocessing and Waste Management (RECOD91)。

久保田 益充: "高レベル放射性廃棄物からの超ウラン元素の効率的回収" 化学と工業. 44(8). 1284-1287. (1991)

Masumitsu Kubota：“从高放射性废物中有效回收超铀元素”，化学与工业，1284-1287。

M.Wakasugi,T.Horiguchi,et al.: "Direct Observation of the DELTAJ=2 Forbidden Transition in NdI Induced by the Second-Order Hyperfine Perturbation." Phys.Rev.A44,No.9. 6115-6118 (1991)

M.Wakasugi、T.Horiguchi 等人：“二阶超精细扰动引起的 NdI 中 DELTAJ=2 禁止跃迁的直接观察”。

K.Shirahashi,M.Kubota,et al.: "Precipitation Behavior of Transuranium Elements during Denitration of High-Level Radioactive Liquid Waste by Formic Acid." J.Nucl.Scie.Technol.29(6). 559-565 (1992)

K.Shirahashi、M.Kubota 等人：“甲酸对高放射性废液脱硝过程中超铀元素的沉淀行为”。