The guarantee that is offered on something that cant be guaranteed for as long as that person keeps a part of their body in boiling water. In other words there is no guarantee
Boiling water reactor is a type of nuclear reactor in which steam is produced within the reactor pressure vessel instead of a separate boiler to produce electricity. Typically operate at around 285°C (550°F).
This type of reactor have 2 major fluid loops which is the reactor-steam turbine-steam condenser-water treatment loop and steam condenser-cooling unit loop.