Boiling water reactor core shroud head bolt retainer tool

摘要

The inventive tool is designed to ensure proper plant operation position of the core shroud head bolt assemblies of a boiling water nuclear reactor. The tool exerts an upward pulling force on stuck retainers to return them to the locking position around the nut. The tool includes a frame, an engagement member, and a collar. The engagement member is lowered toward and end of the bolt until it comes into contact therewith. Further movement of the engagement member causes the frame and collar to move upward, lifting the retainer and extending the spring.

主权项

1. A tool configured to reposition a spring-biased retainer of a boiling water reactor core shroud head bolt about a head bolt nut, the tool comprising:
a frame having a first end and a second end, said frame including two elongate arms each having a longitudinal axis and first and second ends, and a unitary panel coupled to said elongate arms at their first ends, said frame defining a side opening between said elongate arms; an engagement member coupled to said frame at said first end such that said frame and said engagement member are relatively movable; and a collar coupled to said frame at said second end, said collar defining an opening therein, said collar opening being aligned with said frame side opening, said collar connecting said elongate arms at their second ends opposite said collar opening; wherein the tool is configured to exert a repositioning force to the retainer upon engagement of said engagement member with the core shroud head bolt.