The absorber rod comprises cladding of {HEAD ~ stainless steel} closed by plugs and containing a column of absorber pellets e.g. of {TAIL ~ boron carbide} 
The absorber rod comprises cladding of { HEAD ~ stainless steel } closed by plugs and containing a column of absorber pellets e.g. of { TAIL ~ boron carbide }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL