A further advantage of said invention is that the plurality of {TAIL ~ individual containment envelopes} minimize the escape of radioactive gas in {HEAD ~ the event} of any physical damage to an assembly of such envelopes 
A further advantage of said invention is that the plurality of { TAIL ~ individual containment envelopes } minimize the escape of radioactive gas in { HEAD ~ the event } of any physical damage to an assembly of such envelopes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH