Helicopter IBIS and Sr-90 sources

[Brian Rees <brees@LANL.GOV>]

Can someone 'splain this to me??? I don't quite understand how this works, 

a report references a shielded container, so I'm kinda confused (not 

terribly unusual).



"The strontium-90 was part of the helicopter's in-flight blade inspection 

systems (IBIS), which warn

pilots when the blades develop stress fractures. IBIS devices release 

minute amounts of radiation

when a leak develops in the pressurized blades, and a radiation detector on 

each wing immediately

notifies the pilot that a blade may fail."



Thanks in advance,

Brian Rees 



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