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    • 101. 发明授权
    • 외·내부 결정립 크기가 다른 핵연료 소결체의제조방법
    • 외·내부결정립크기가다른핵연료소결체의제조방외
    • KR100450711B1
    • 2004-10-01
    • KR1020020016917
    • 2002-03-28
    • 한국원자력연구원한국수력원자력 주식회사
    • 김건식송근우양재호강기원김종헌정연호
    • G21C3/62
    • Y02E30/38
    • PURPOSE: A method is provided to reduce a mechanical interaction between the sintered body and the coated pipe by permitting the internal crystal grain and the external crystal grain to have different sizes. CONSTITUTION: A method for manufacturing a nuclear fuel sintered body(1) comprises the steps of shaping a form by compressing nuclear fuel powder; heating the form under a reducing gas atmosphere at the temperature of 1400 to 1750 Deg.C for 0.1 minute to 10 hours; and sintering the resultant structure under an equivalent oxygen tension atmosphere where the ratio of carbon oxide and hydrogen ranges from 0.15 to 0.70, at the temperature of 1400 to 1750 Deg.C for 10 minutes to 15 hours, in such a manner that the crystal grain existing in an external area(2) of the sintered body has a size of 3 to 15 micron meters and the crystal grain existing in an internal area(3) of the sintered body has a size 1.5 to 8 times larger than the size of the crystal grain exiting in the external area.
    • 目的:提供一种通过允许内部晶粒和外部晶粒具有不同尺寸来减少烧结体和涂覆管之间的机械相互作用的方法。 一种制造核燃料烧结体(1)的方法,包括以下步骤:通过压缩核燃料粉末来成形模板; 在1400〜1750℃的还原性气氛下加热0.1分钟〜10小时; 以及在碳氧化物和氢气的比率为0.15-0.70的等效氧气张力气氛下,在1400-1750℃的温度下进行10分钟至15小时的烧结,使得晶粒 存在于所述烧结体的外部区域(2)中的尺寸为3至15微米,存在于所述烧结体的内部区域(3)中的晶粒的尺寸为所述烧结体的尺寸的1.5至8倍 晶粒在外部区域退出。
    • 102. 发明授权
    • 불량 UO₂분말을 재활용한 UO₂소결체의 제조방법
    • 불량UO₂을을재활재활용용용U U U U법법법법법법법
    • KR100441563B1
    • 2004-07-23
    • KR1020020019786
    • 2002-04-11
    • 한국원자력연구원한국수력원자력 주식회사
    • 김건식송근우양재호강기원김종헌이영우정연호
    • G21C3/02
    • Y02E30/40
    • PURPOSE: A method for fabricating UO2 pellets recycling inferior UO2 powders is provided to improve the quality of nuclear fuel pellets and reduce a manufacturing cost by recycling the inferior UO2 powders. CONSTITUTION: UO2 polycrystalline powders are fabricated by performing a thermal treatment process for inferior UO2 powders or non-inferior UO2 powders under the partial pressure of oxygen less than the partial pressure of U3O8 equilibrium oxygen. U3O8 powders are fabricated by oxidizing the UO2 polycrystalline powders. Mixed powders are fabricated by mixing the U3O8 powders with the non-inferior UO2 powders. A molding body is formed by shaping the mixed powders within a mold. A sintering process for the molding body is performed under the atmosphere of reductive gas.
    • 目的:提供一种制造回收劣质UO 2粉末的UO 2颗粒的方法,以提高核燃料颗粒的质量并通过回收劣质UO 2粉末来降低制造成本。 结构:通过在低于U3O8平衡氧分压的氧气分压下对劣质UO2粉末或非劣质UO2粉末进行热处理工艺来制造UO2多晶粉末。 U3O8粉末是通过氧化UO2多晶粉末制造的。 通过将U3O8粉末与非劣质UO2粉末混合来制造混合粉末。 通过在模具内成型混合粉末来形成模塑体。 在还原气氛下进行成型体的烧结工序。
    • 103. 发明授权
    • 열전도성 금속망이 형성된 핵연료 소결체의 제조방법 및 이에 따라 제조되는 핵연료 소결체
    • 具有导热金属网络的核燃料颗粒的制备方法和核燃料颗粒
    • KR101652729B1
    • 2016-09-01
    • KR1020150050112
    • 2015-04-09
    • 한국원자력연구원
    • 김동주김건식김종헌이영우오장수양재호구양현송근우
    • G21C3/60G21C3/62
    • Y02E30/40
    • 본발명은산화물핵연료과립과, 입자크기가 2 ㎛내지 60 ㎛이고판상형인열전도성금속분말을혼합하는단계(단계 1); 상기단계 1에서열전도성금속분말이혼합된산화물핵연료과립을성형하여성형체를제조하는단계(단계 2); 및상기단계 2의성형체를소결하는단계(단계 3);를포함하는열전도성금속망이형성된핵연료소결체의제조방법을제공한다. 본발명에따른핵연료소결체의제조방법은마이크로크기의열전도성금속분말을사용함으로써소결체제조시발생하는금속물질의산화를방지하여소결체의열전도성을감소시키는문제를해결하고, 판상형의금속분말을사용함으로써소결체미세조직의균질성을더욱개선할수 있다. 이에따라, 궁극적으로제조되는핵연료소결체의밀도가향상될뿐만아니라열전도도가매우우수하다.
    • 本发明涉及具有导热金属网的核燃料颗粒的制造方法。 该方法包括:将氧化物核燃料颗粒与粒径为2-60μm的板式导热金属粉末混合的第一步骤; 在前一步骤中模制与导热金属动力混合的氧化物核燃料颗粒并制造模制物体的第二步骤; 以及烧结成型体的第3工序。 根据所公开的说明书,制造方法能够通过使用微小尺寸的导热金属功率来解决与降低颗粒的热导率相关的问题,从而防止在制造颗粒的过程中金属物质的氧化。 此外,通过使用板式金属电源,可以提高微结构的均匀性。 因此,最终能够提高核燃料粒子的密度,同时可以提高导热性。
    • 106. 发明公开
    • 이중냉각 환형 핵연료봉 및 이의 제조방법
    • 双冷凝管核燃料棒及其制造方法
    • KR1020120043938A
    • 2012-05-07
    • KR1020100105248
    • 2010-10-27
    • 한국원자력연구원한국수력원자력 주식회사
    • 송근우박정용김형규구양현
    • G21C3/07C22C16/00
    • Y02E30/40G21C3/07C22C16/00G21C3/10G21C21/02
    • PURPOSE: A double cooling cyclic type fuel rod and a manufacturing method thereof are provided to control compressive stress giving rise to the damage of an inner side zirconium alloy cladding tube by applying tensile stress to the inner side zirconium alloy cladding tube to an axial direction. CONSTITUTION: An inner side zirconium alloy cladding tube(1) is arranged on the same axel with an outer side zirconium alloy cladding tube(2). The diameter of the inner side zirconium alloy cladding tube is larger than the diameter of the outer side zirconium alloy cladding tube. A cyclic type UO2 sinter body(3) is offered between the inner side zirconium alloy cladding tube and the outer side zirconium alloy cladding tube. A cyclic type rod edge stopper(4) seals both ends of the inner side zirconium alloy cladding tube and the outer side zirconium alloy cladding tube. The inner side zirconium alloy cladding tube is composed of a complete recrystallization metal tissue. The outer side zirconium alloy cladding tube composed of one metal tissue selected from a group consisting of complete recrystallization, part recrystallization, and stress relaxation.
    • 目的:提供一种双重冷却循环式燃料棒及其制造方法,通过向内侧锆合金包覆管向轴向施加拉伸应力来控制产生内侧锆合金包层管的损伤的压缩应力。 构成:内侧锆合金包覆管(1)与外侧锆合金包层管(2)配置在同一轴上。 内侧锆合金包覆管的直径大于外侧锆合金包覆管的直径。 在内侧锆合金包覆管和外侧锆合金包覆管之间设置有循环型UO2烧结体(3)。 环状棒边缘止动器(4)密封内侧锆合金包层管和外侧锆合金包覆管的两端。 内侧锆合金包层管由完全再结晶金属组织组成。 外侧锆合金包覆管由选自完全再结晶,部分再结晶和应力松弛的一种金属组织组成。