ACCUMULATION TYPE ALIEN SUBSTANCE PREVENTION FILTER INSTALLED AT LOWER END FIXING BODY OF NUCLEAR FUEL ASSEMBLY

摘要

PURPOSE: An accumulation type alien substance prevention filter installed at a lower end fixing body of a nuclear fuel assembly is provided to protect a nuclear fuel rod by preventing alien substances flowed into a nuclear fuel assembly. CONSTITUTION: An accumulation type alien substance prevention filter installed at a lower end fixing body of a nuclear fuel assembly comprises a multitude of sheet. The sheets are formed with a multitude of cooling water flowing hole(21). The cooling water flowing holes of the sheets are crossed to each other. The sheets are accumulated on the lower end fixing body. A multitude of flowing holes is formed on the sheet toward a vertical direction, a horizontal direction, and a diagonal direction.