Buddhism and Science

Science is capable of helping living beings flourish, or of generating suffering for living beings. Either of these two capacities are the result of trial and error as well as research and technological development. So if it is known that in the trial and error process of developing technologies to help life flourish that some degree of suffering could occur in the case of an error (such as a nuclear meltdown causing death or radiation sickness, or experimental medicine causing sickness or death,) would those scientists developing said technologies generate bad karma if suffering did, in fact, occur, even though their intention (life's flourishing) is pure? How does an active R&D scientist who is also a Buddhist navigate the potential suffering that their R&D is capable of generating, so as to not accumulate any bad karma?