* * * The SNAP - 10A used enriched uranium fuel , zirconium hydride as a moderator , liquid sodium potassium alloy coolant .
* * * The SNAP - 10A was activated or deactivated with beryllium reflectors .
* * * The SNAP - 10A used enriched uranium fuel , zirconium hydride as a moderator , liquid sodium potassium alloy coolant , and was activated or deactivated with beryllium reflectors .