A nuclear plant is read as immense power held under strict control. In dreams it often stands for intense feelings or pressure that must be contained, and for unease about what happens if containment slips.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.