…those plans are hard to get. The whole story of what happened in the Bikini Atoll in the 50ies is about to fade away and it should be avoided at any cost, as els wise we are doomed to get through it again.
Castle Bravo and the Tzar Bomb were both incredible foolish experiments.
However, here are the plans and I can only recommend to take the trip to Bikini. The USS Saratoga will most probably collapse in the next 5 to 10 years and then there is nothing left as a beacon to remember what happened.