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The MYRRHA reactor is unique in many aspects. The pool type reactor is cooled by 7,800 tons of lead-bismuth eutectic (LBE). All primary systems are within the double walled 16 m high and 10 m wide vessel.
LBE has been carefully selected as coolant and spallation source of the MYRRHA reactor:
By default, the MYRRHA reactor has a sub-critical design: it doesn’t contain enough fissile material to maintain the chain reaction. For safety reasons, the reactor design includes passive cooling: in case of electric failure or when the linac is switched off and the reactor comes to an immediate stop, the cooling of the reactor is guaranteed by the natural circulation of the LBE.
MYRRHA will have a maximum output of 100 MWth.