CHAIRMAN MOSELEY:
The next presentation is by Roger Thompson on the
Review of the Laboratory Procedures for Soil Analysis.
DOR. THOMPSON:
I would like to talk to you today about the sample
pathways in the laboratory with some of the aspects that have an impact at
each step.
Now,
about.
the top box
(31)
is essentially what
Howard has just talked
The soils lab has received the sample, has ground it, dried it, and
they have loaded it into a five hundred milliliter bottle, and DRI comes in
and takes away all of the information about the sample location, and he has
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assigned a five-digit number.
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numbers.
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on it so that the laboratory has no knowledge of the depth segment that it
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comes from or the location.
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that's filled out that says what type of analysis is needed whether it's
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cesium-137 or plutonium.
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We have given them a block of laboratory
ORI will paste labels on the bottles which have only this number
Along with the bottle there is some paperwork
For the cesium-137, the bottles are completely full.
Howard mentioned
1?
that he fills it with 700 grams.
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He fills it to the shoulder of the bottle and it will be more or less,
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depending on how much material is in there.
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Consider the leftmost branch.
It depends a little bit on the density.
The bottle comes down and the paper-
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work, and we log it in the laboratory, and then, depending upon the type of
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analysis, it goes to the left or right branch.
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This is the leftmost branch.
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laboratory preparation that is needed.
Look at the cesium-137.
In a sense, this is simple in that there's no
The samples come in in these bot-
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-tles and they are calibrated to count the cesium in these bottles on our
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detectors, so, the sample goes directly to the detector, waiting for count-
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ing time.
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dedicated to this project.
We have two intrinsic germanium detectors which are completely
Nothing but ORERP samples are being counted on
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