| 摘要 |
FIELD: nuclear power engineering. ^ SUBSTANCE: proposed process of recovering fuel assemblies of water-moderated water-cooled reactors incorporating damaged fuel elements, such as leaking ones, includes removal of detachable top nozzle, detection of leaking fuel element, and installation of new fuel element or displacer. Leaking fuel element is extracted by knocking its lower end cap out of bottom spacer grid applying force of not over 140 kgf followed by its pulling applying force not over 30 kgf. Installation of new fuel element or displacer in different areas of fuel assembly needs maximal forces depending on fuel burn-up. This process makes it possible to reduce probability of leaking fuel element destruction in the course of its extraction and damage to new fuel element or displacer can during its installation. ^ EFFECT: enhanced fuel burn-up due to increasing yield upon replacing leaking fuel elements by new ones in fuel assembly. ^ 3 cl |
