Using it too often or using it to destroy will take away from its power, and will gradually make it less then nuclear, but also those who use that side of it often many times never fully develop it. It is so powerful but also elusive that some people don't realize they have it. Wanting to test it the wrong way to prove it to themselves, will cause great destruction and an adaptation of the surrounding.
Those that harness it for the good know very well what they are developing, they are intentional about it, and use it to fuel and grow themselves and their happy surroundings, and in case of need, use it to protect their loved ones. Though even then, using it as a weapon be the wrong choice. The true magic of it is in creating subtle currents and energies that are powerful yet happy and playful, that just make things go right, and these subtle energies needs to be nurtured again with great consciousness for them to stick around.
Some people wonder when they see a walking nuclear reactor, thinking, how and why would someone develop such a great power if they never intend to use it. But they do use it! Just not all at once.