Not only did you not read the article, but you apparently don’t know that much about TMI either. There are multiple reactors at TMI, the one that had the accident is not the one they’re restarting.

The one they’re restarting shut down a few years ago, along with several other nuclear plants, due to being too expensive to compete on cost with all the cheap gas post fracking boom.

Yes, for reasons passing understanding the state and federal government allowed existing, functional nuclear plants to close in favor of natural gas plants.

I use BD-R for archival storage of important files. They’re cheaper and easier than tape as well as small. I burn them in triplicate and throw them in the same case and as long as the same 3 bits don’t corrupt I can recover. The shelf life on a blue ray sealed and stored well is a few decades which is better than most other media.