sodium iodide scintillation detectors

["Dave Oshlo" <doshlo@mgpi.com>]

Dear radsafers,



I'm looking for two pieces of data on a typical sodium iodide

scintillation detector but can find inadequate documentation.



1.	What is the life expectancy of a sodium iodide scintillation

detector in an operational nuclear power plant environment?

2.	What is the shelf life of a sodium iodide scintillation detector

(in the warehouse as a spare part)?



An exhaustive web search has not provided any solutions.  If someone

could point me in the right direction, I would be much obliged.



Thanks,



Dave Oshlo

MGP Instruments