Relevant 2024 excerpt from linkedin link: double hold was placed on Subgroup 4 resulting in the associated control rod lower grippers being engaged prior to

Relevant 2024 excerpt from linkedin link: double hold was placed on Subgroup 4 resulting in the associated control rod lower grippers being engaged prior to removing the upper gripper drawer. After successful replacement of the UG coil CPMD the double hold was removed, per 2-NOP-99.07, and CEAs 43, 45, and 49 fell and fully inserted into the core. CEA means Control Element Assembly. A CEA is a group of control rods that can be inserted into or withdrawn from a reactor core