6 ms·

This happened in 2024 too. This link (second one down, first event is missing control rods in Texas...) has almost the exact same wording as the article. http

by aeonik 2mo ago

This happened in 2024 too. This link (second one down, first event is missing control rods in Texas...) has almost the exact same wording as the article. https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/20241115en https://www.nrc.gov/reading-rm/doc-collections/event-status/... I found the root cause of the older issue on LinkedIn of all places. https://www.linkedin.com/posts/robert-meyer-8672ab4a_st-lucie-ler-multiple-control-rod-drop-share-7288007676314238976-I1TW/ https://www.linkedin.com/posts/robert-meyer-8672ab4a_st-luci... Root cause of 2024 was apparently a procedural issue combined with electrical failure of the control rod grippers.

robocat 2mo ago
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 A CEA is a group of control rods that can be inserted into or withdrawn from a reactor core