Nuclear waste management is very complex. If you've never seen the procedures, you probably can't imagine the complexity. It's not just storing nuclear waste, it's also monitoring radiation, updating statistics, managing the nuclear waste warehouse, etc.
All calculations according the decay of nuclear radiation need to be very accurate. There is really no room for errors. The keywords for nuclear waste management are safety, accuracy and secrecy. Therefore they needed a solid base to develop the applications they need(ed). Because there isn't a single software house that develops such a specific software, the company that handles the nuclear waste had to develop every single topic themselves. While looking for the most solid development environment, they came across Delphi many years ago. That's when they made their choice...
Delphi was chosen more than 10 years ago. Delphi never let them down, not even on the smallest issue. All of the in house developed applications are written in Delphi, going from the simplest phone list to the handling of the most complex and top secret data. Delphi completely fullfils their requirements.
I was really impressed by the complexity of the organization when they asked Be-Delphi to support their development team. Companies like that really expose the power of Delphi. All of the applications look rather 'normal' but in fact they are a bunch of complex rules and objects. The applications almost seem... radioactive ;-)