Help with information on old survey instruments

["Anagnostopoulos, Harry W." <HAROLD.W.ANAGNOSTOPOULOS@saic.com>]

FUSRAP St. Louis has been tasked with collecting some data on the MDAs for

some surface contamination survey instruments that were used in the 1950's

to 1960's timeframe. We could use your help with any information regarding

the following instruments:



Victoreen Model 389C (Thyac? GM-type survey meter)

Victoreen Model 356 (Ion chamber used for alpha contamination surveys)

Eberline PAC-3G (Gas proportional counter used for alpha contamination

surveys)



Any information on the typical background, window dimensions, window

material and density thickness, and typical instrument efficiency for

Natural Uranium would be appreciated.



We have, of course, done an internet search and have contacted the

manufacturers directly with limited success.



Please feel free to contact Mr. Mark Peterson at 314.429.9340 x14 or email

Mark.A.Peterson@saic.com with any questions or comments.



Thanks in advance for you help!



-----------------------------------------------------------

Harry Anagnostopoulos, CHP

Senior Health Physicist

SAIC

9921 St. Charles Rock Rd.

St. Ann, MO  36074

(314) 429-9340  x22



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