A group of rods having the desired fuel enrichment and {HEAD ~ additive types} is placed on {TAIL ~ a first queuing table} 
is placed on
A group of rods having the desired fuel enrichment and { HEAD ~ additive types } is placed on { TAIL ~ a first queuing table }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL