Personal profit, zealotry, career seeking, incompetence, design flaws, political agenda. This also includes the design phase. The RBMK reactor was an irresponsible design from the onset, even without the unknowns.
Graphite moderated reactors are prone to graphite cracking, as also evidenced by UK's AGR reactor fleet. Maybe pebble bed reactors are safer, because new pebbles are continuosly fed in and the spent ones are extracted for reprocessing. We'll se how the HTR-10 and the HTR-PM fare.
Graphite moderated reactors are prone to graphite cracking, as also evidenced by UK's AGR reactor fleet. Maybe pebble bed reactors are safer, because new pebbles are continuosly fed in and the spent ones are extracted for reprocessing. We'll se how the HTR-10 and the HTR-PM fare.