RE: Eberline ASP-1 Neutron Detector

[glen.vickers@EXELONCORP.COM]

Give Eberline a call for historical data.  This type of instrument typically

sees most of it's service in high temperature and vibration situations from

containment entries at power.  We've had reliable performance from our

ASP-1/NRD units.



Glen Vickers



> -----Original Message-----

> From:	Stephen Trickett [SMTP:trickett2000@HOTMAIL.COM]

> Sent:	Thursday, July 12, 2001 3:49 PM

> To:	radsafe@list.vanderbilt.edu

> Subject:	Eberline ASP-1 Neutron Detector

> 

> Radsafers

>  

>      I am in search of any data or operational experience regarding the

> affects of excessive heat or vibration on the Eberline ASP-1 Neutron

> Detector.  We use the instrument to verify Neutron Dose Rates at the

> perimeter of an ISFSI storage cask area.  Observed dose rates have

> increased by nearly 500 percent of that which was anticipated.  The

> instrument spent upwards of 3 hours in 90 degree heat, and 1 hour on the

> transport.  Could the excessive heat have affected the response?  Could

> the external heat not be an accurate representation of the temperature

> within the rem ball?  Should one anticipate affects on operability as a

> result of the excessive vibrations experienced while being transported?  I

> have attempted to recreate each scenario with little success.  The vendor

> has not supported any such possibilities.  Thank you.

>  

>  

> Stephen M. Trickett

> Physicist

> Exelon Nuclear

> 

>   _____  

> 

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