[ RadSafe ] Analog Eberline monitor background responses

[Joe Shonka]

Mehran

In the late 1980s, I was the principal scientist on a project to calibrate, traceable to NIST, the post accident monitors (NUREG-0737) for the IPC Clinton Plant.  Sargent & Lundy was the A/E for that plant.  We conducted many tests on that system, and submitted a detailed final report.  If you can’t find the report in S&L’s library, I think the USNRC would have a copy in the Clinton licensing docket in DC.  I don’t think I still have a copy of the final report, but I will look in my old files just in case.

Good Luck

Joe Shonka

Joseph J. Shonka, Ph.D.
Shonka Research Associates, Inc.
119 Ridgemore Circle
Toccoa, GA 30577
770-509-7606


Sent from Mail for Windows 10

From: MEHRAN.A.MOHAMMADIAN at Sargentlundy.com
Sent: Tuesday, February 20, 2018 6:33 PM
To: radsafe at health.phys.iit.edu
Subject: [ RadSafe ] Analog Eberline monitor background responses

Hello, RadSafers!  Long time listener / watcher but never poster here 
looking for some help.  I'm working on a project where there is an 
identified need to quantify the external ambient gamma background response 
of some analog Eberline particulate, iodine, and noble gas radiation 
monitors (early 1980s vintage).  I can't seem to find any documentation 
listing the background response for the specific models installed in the 
field in units of cpm / mR/hr (or similar). 

Does anyone have information that can be shared with me regarding the 
background response of any of the following configurations:

Particulate Monitor:
Vendor: Eberline
Detector: RDA-3A (Beta Scintillator)
Sample Chamber: SA-1 (Moving Filter Paper)
Interface Box: IB-2 (Operating in Gross Counting Mode)
Analog Display Module: EC2-7 (Capable of Fixed or Variable Background 
Subtract)

Noble Gas Monitor:
Vendor: Eberline
Detector: RDA-3A (Beta Scintillator)
Sample Chamber: SA-3
Interface Box: IB-2 (Operating in Gross Counting Mode)
Analog Display Module: EC2-7 (Capable of Fixed or Variable Background 
Subtract)

Iodine Monitor:
Vendor: Eberline
Detector: RDA-2A (Gamma Scintillator)
Sample Chamber: SA-2 (Fixed Cartridge)
Interface Box: IB-2 (2 SCA Cards, Automatic Gain Stabilized Mode)
Analog Display Module: EC2-7 (Capable of Fixed or Variable Background 
Subtract)

I sincerely apologize if I sent this message before.  The previous attempt 
didn't appear to go through nor does it show up on the RadSafe Archives 
for February 2018.

Thank you in advance!

--
Mehran Mohammadian, P.E.
Senior Associate (Licensed in IL)
Nuclear Power Technologies
Sargent & Lundy
office: 1-608-291-0447 | mobile: 1-920-312-0470
email: mmohammadian at sargentlundy.com
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