CN113436757A - 一种具有均温结构的模块化固态反应堆堆芯 - Google Patents
一种具有均温结构的模块化固态反应堆堆芯 Download PDFInfo
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Abstract
本发明公开了一种具有均温结构的模块化固态反应堆堆芯,包括保护钢壳、应急冷却通道、反射层、停堆棒、活性区,活性区由若干层均温层和实体层交错堆叠组成,均温层和实体层内含有燃料芯块和热管通道。本发明固态堆芯采用均温结构和模块化结构,可展平堆芯温度分布,提升固态堆芯的安全性。
Description
技术领域
本发明涉及核反应堆工程技术领域,具体涉及一种具有均温结构的模块化固态反应堆堆芯。
背景技术
热管冷却反应堆堆芯一般为固态,堆芯热量通过热管导出到能量转换系统。固态堆芯没有流动系统,省略辅助系统,具有结构紧凑、便于运输、固有安全性等优势;采用热管作为传热部件,具有结构简单、避免单点失效等特点。当前固态堆芯结构通常采用金属基体以固定热管和燃料棒,进行堆芯和热管之间的传热。由于堆芯功率密度较大和功率分布的不均匀,金属基体的传热能力可能不能满足堆芯传热的需要导致堆芯失效。
发明内容
为实现对固态反应堆堆芯的热量平均和功率展平,本发明设计了一种具有均温结构的模块化固态反应堆堆芯,本发明结构简单、块化结构,可实现固态反应堆堆芯的热量平均和功率展平。
为达到上述目的,本发明采取以下设计方案:
一种具有均温结构的模块化固态反应堆堆芯,包括保护钢壳1、应急冷却通道2、反射层3、活性区4和停堆棒5;所述保护钢壳1包围反射层3,保护钢壳1和反射层3之间留有环形的应急冷却通道2,反射层3中心设置有活性区4,反射层3内部边缘分布有若干停堆棒5;所述活性区4包括若干高温热管41、燃料芯块42、均温层43和实体层44,均温层43和实体层44相互交错堆叠组成活性区4的基体,均温层43和实体层44内包含有燃料芯块42,高温热管41穿过均温层43和实体层44的热管通道。
所述应急冷却通道2直接连通冷源,通过冷却工质进行换热,冷却工质为水、钾、钠、铅或锂的单质或混合物。
所述应急冷却通道2填充有相变材料,相变过程为相变材料由固态转变为液态,液态的相变材料与冷源进行换热,相变材料可选用铯、钾、钠、锂、银、铅、或铋单质工质或混合物。
所述高温热管41穿过均温层43和实体层44导出热量,高温热管的工质为铯、钾、钠、锂、银、铅、或铋单质工质或混合物。
所述均温层43为中空结构,内壁表面设置有多孔结构,均温层43填充有工质,多孔结构为金属丝网、烧结粉末、烧结纤维、槽道、独立通道的单独结构或组合,工质为铯、钾、钠、锂、银、铅、或铋的单质或混合物。
所述实体层44为金属实体,金属材料为铜、铁、镍、锰、铬、钴、钼、钨、锑、银、钌、钯、或铂单质或混合物。
所述燃料芯块42独立分散于均温层43和实体层44,燃料芯块42与均温层43和实体层44之间存在间隙。
所述若干燃料芯块42组成燃料棒并封装,燃料棒穿过均温层43和实体层44,燃料棒内燃料芯块42之间存在间隙。
和现有技术相比较,本发明具备如下优点:
本发明堆芯设置有应急冷却通道2可通过对流或相变进行应急状态下堆芯的冷却,设置有均温层43可通过内部的相变传热进行堆芯温度的展平,设置均温层43和实体层44交错组合成活性区4的基体,可实现堆芯的模块化,本发明结构紧凑,质量较轻,可实现固态堆芯温度展平和加强堆芯传热。
本发明针对固态堆芯基体传热受限的问题,提出一种具有均温结构的模块化固态反应堆堆芯,本发明结构紧凑,质量较轻,无运动部件,特殊的结构设计能够极大地提升堆芯的传热性能,提升堆芯的安全性。
附图说明
图1为具有均温结构的模块化固态反应堆堆芯的示意图。
图2为活性区径向的示意图。
图3为活性区轴向的示意图。
具体实施方式
现结合实例、附图对本发明作进一步描述:
如图1所示,本发明一种具有均温结构的模块化固态反应堆堆芯,包括保护钢壳1、应急冷却通道2、反射层3、活性区4和停堆棒5;如图2和图3所示,所述保护钢壳1包围反射层3,保护钢壳1和反射层3之间留有环形的应急冷却通道2,反射层3中心设置有活性区4,反射层3内部边缘分布有若干停堆棒5,所述活性区4包括若干高温热管41、燃料芯块42、均温层43和实体层44,均温层43和实体层44相互交错堆叠组成活性区4的基体,均温层43和实体层44内包含有燃料芯块42,高温热管41穿过均温层43和实体层44的热管通道。
作为本发明的优选实施方式,所述应急冷却通道2直接连通冷源,通过冷却工质进行换热,冷却工质为水、钾、钠、铅或锂的单质或混合物。
作为本发明的优选实施方式,所述应急冷却通道2填充有相变材料,相变过程为相变材料由固态转变为液态,液态的相变材料与冷源进行换热,相变材料可选用铯、钾、钠、锂、银、铅、或铋单质工质或混合物。
作为本发明的优选实施方式,所述均温层43和实体层44堆叠组成活性区4,高温热管41穿过均温层43和实体层44导出热量,高温热管的工质为铯、钾、钠、锂、银、铅、或铋单质工质或混合物。
作为本发明的优选实施方式,所述均温层43为中空结构,内壁表面设置有多孔结构,均温层43填充有工质,多孔结构为金属丝网、烧结粉末、烧结纤维、槽道、独立通道的单独结构或组合,工质为铯、钾、钠、锂、银、铅、或铋的单质或混合物。
作为本发明的优选实施方式,所述实体层44为金属实体,金属材料为铜、铁、镍、锰、铬、钴、钼、钨、锑、银、钌、钯、或铂单质或混合物。
作为本发明的优选实施方式,所述燃料芯块42独立分散于均温层43和实体层44,燃料芯块42与均温层43和实体层44之间存在间隙。
作为本发明的优选实施方式,所述若干燃料芯块42组成燃料棒并封装,燃料棒穿过均温层43和实体层44,燃料棒内燃料芯块42之间存在间隙。
本发明的工作原理为:固态反应堆堆芯正常工况:均温层43和实体层44交错堆叠组成的活性区4内燃料芯块42发生核裂变反应释放热量,实体层44通过金属导热将热量传输到高温热管41,均温层43吸收热量使得均温层43内部工质相变产生蒸气,蒸气流动到靠近高温热管41处温度较低的区域冷凝释放热量,由于相变潜热和蒸气流动传热的效率远大于金属导热,均温层43的传热效率大于实体层44,有利于展平堆芯温度和功率分布。固态反应堆堆芯事故工况:停堆棒5插入堆芯,反应堆停堆,均温层43将事故发生处的热量快速传导到反射层3,反射层3将热量传输到应急冷却通道2,应急冷却通道2通过冷却剂将热量传导至冷源,保障堆芯安全。
Claims (7)
1.一种具有均温结构的模块化固态反应堆堆芯,其特征在于:包括保护钢壳(1)、应急冷却通道(2)、反射层(3)、活性区(4)和停堆棒(5);所述保护钢壳(1)包围反射层(3),保护钢壳(1)和反射层(3)之间留有环形的应急冷却通道(2),反射层(3)中心设置有活性区(4),反射层(3)内部边缘分布有若干停堆棒(5);所述活性区(4)包括若干高温热管(41)、燃料芯块(42)、均温层(43)和实体层(44),均温层(43)和实体层(44)相互交错堆叠组成活性区(4)的基体,均温层(43)和实体层(44)内包含有燃料芯块(42),高温热管(41)穿过均温层(43)和实体层(44)的热管通道。
2.根据权利要求1所述一种具有均温结构的模块化固态反应堆堆芯,其特征在于:所述应急冷却通道(2)直接连通冷源,通过冷却工质进行换热,冷却工质为水、钾、钠、铅或锂的单质或混合物;
所述应急冷却通道(2)填充有相变材料,相变过程为相变材料由固态转变为液态,液态的相变材料与冷源进行换热,相变材料选用铯、钾、钠、锂、银、铅、或铋单质工质或混合物。
3.根据权利要求1所述一种具有均温结构的模块化固态反应堆堆芯,其特征在于:所述高温热管(41)穿过均温层(43)和实体层(44)导出热量,高温热管的工质为铯、钾、钠、锂、银、铅、或铋单质工质或混合物。
4.根据权利要求1所述一种具有均温结构的模块化固态反应堆堆芯,其特征在于:所述均温层(43)为中空结构,内壁表面设置有多孔结构,均温层(43)填充有工质,多孔结构为金属丝网、烧结粉末、烧结纤维、槽道、独立通道的单独结构或组合,工质为铯、钾、钠、锂、银、铅、或铋的单质或混合物。
5.根据权利要求1所述一种具有均温结构的模块化固态反应堆堆芯,其特征在于:所述实体层(44)为金属实体,金属材料为铜、铁、镍、锰、铬、钴、钼、钨、锑、银、钌、钯、或铂单质或混合物。
6.根据权利要求1所述一种具有均温结构的模块化固态反应堆堆芯,其特征在于:所述燃料芯块(42)独立分散于均温层(43)和实体层(44),燃料芯块(42)与均温层(43)和实体层(44)之间存在间隙。
7.根据权利要求1所述一种具有均温结构的模块化固态反应堆堆芯,其特征在于:所述若干燃料芯块(42)组成燃料棒并封装,燃料棒穿过均温层(43)和实体层(44),燃料棒内燃料芯块(42)之间存在间隙。
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