Kepco Nuclear Fuel Co., Ltd.

Hak In Lee

Dong Geun Ha

Kyong Bo Eom

Seong Soo Kim

Jin Sun Kim

Su Pil Ryu

Joo Hong Chun

Ba Leum Kim

Joo Young Ryu

Sang Youn Jeon

Jae Ik Kim

O Cheol Kwon

The present invention relates to a top nozzle and a nuclear reactor in which an in-core instrument, which is supposed to be inserted through a top head of a nuclear reactor, is inserted through a guide pin for an upper core plate. In a nuclear reactor including guide pins for aligning a top nozzle for a nuclear fuel assembly with an upper core plate of a nuclear reactor, a guide hole () is axially formed through the guide pins () and in-core instruments () are inserted through the guide holes ().

Nuclear fuel assembly top nozzle having in-core instrument insertion structure using an upper core plate hollow guide pin

The present invention relates to a lower end fitting for reducing flow resistance due to an in-core instrument in a nuclear fuel assembly, that is, a lower end fitting () having a plurality of flow holes for a nuclear fuel assembly, in which the flow holes () are formed under an assembly groove in which an instrumentation tube () for a nuclear fuel assembly is inserted, and at least two or more flow holes () are formed at a predetermined distance from the central axis (C) of the instrumentation tube ().

Lower end fixing body for improving flow path resistance of in-core detector

Growing community of inventors

Daejeon, South Korea

Hak In Lee