Reference, Questions and Help > Instrument Q&A

REM-500 Neutron Survey Meter (FarWest Technology)

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Dave Warren:
Is there anyone that has a working procedure for this instrument that I can have?
I have heard that Ginna and Nine Mile have one.
Can anyone help?

GLW:

--- Quote from: Dave Warren on Apr 09, 2014, 12:31 ---Is there anyone that has a working procedure for this instrument that I can have?
I have heard that Ginna and Nine Mile have one.
Can anyone help?

--- End quote ---

Writing your own or heavy plagiarizing?

If the former start here,...

http://www.fwt.com/hpi/support/REM500B_REVB3.PDF

If the later, cut me a PO and I'll do it for you,.... ;)

nickscott13:
Correct me if I am wrong, but is the Rem 500 the instrument with a 10 second, 30 second, and 60 second count time with the 60 second being the most accurate of the 3?

We (DAEC) used these for our last Dry Cask Storage campaign and actually went back to using the Rem Ball because we were picking up too much dose trying to get accurate Neutron dose rates on loaded casks.  Sure they were light weight, but you had to take 1 minute readings 13 times per cask, causing us to pick up way to much dose.  The rem ball response time is 5-10 seconds and was much more ALARA.

We borrowed them from a sister plant and sent them right back after the campaign and said we would never use them again.  For day to day neutron surveys they would probably work great, they just arent very ALARA.

Nick

Dave Warren:
The house wants to use them in conjunction with the Rem Ball, I am told. We are using them for Dry Cask also.

SpyCat:
At SONGS' ISFSI, techs didn't like that Remballs would "click" in areas that should have zero neutrons.  Since there were never-used REM500s on the shelf, I saw to get these recalibrated & put into service.  I recommend using protective padding on the meter for doinks during field use.
The REM500 is way accurate, but you get best survey data from 2 minute Integrate Mode counts; data is not so reproducible when using its Dose Rate mode though.  Since ISFSI surveys require numerous points it was not time-effective nor ALARA for the techs to use its integrate mode for surveys. 
Alas, the fuel transfer at SONGS was suspended (Fall 2018) not long after we started using the REM500 there. ::)

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