NUCLEONIX SYSTEMS RC 705E Instruction Manual page 35

However, it is possible to make a fair judgment & arrive at a conclusion to declare a component as
i. CLEAN
ii.CONTAMINATED
iii.SUSPECTED ONTAMINATION/LOW LEVEL CONTAMINATION CASE
Please go through our website www.nucleonix.com & read the content under "case studies report". This will
clearly give an idea on declaring a product into three categories as said above.
By going through our case studies report-1 & by making proper measurements & analysis one can perhaps
say that contamination is less than 0.1Bq/g. But for exact quantification one has to go through analysis by
Radioactive Contamination Analyzer only. Using Rad Check Meter you can definitely classify the product and
say whether it is
i. CLEAN
ii.CONTAMINATED
iii.SUSPECTED CONTAMINATION CASE
Also if your industry is a steel mill / Foundry having induction / smelting furnaces, it is absolutely necessary
to go in for Radioactive Contamination Analyzer to obtain contamination in Bq/g & also to identify type of
nuclide that has contaminated.
23Q) Is Rad check meter a Radiation calibrated meter? What calibration standard Nucleonix Systems has at their
works / factory? Up to whataccuracy it reads.
A) Nucleonix Systems has two calibration labs.
i. Low Level Calibration Lab :
ii.High Dose Rate Calibration Lab
Rad Check meters are calibrated at low level calibration lab using a Gamma survey instrument calibrator
make Amersham , UK/USA. It has NIST (National Institute of standards & technology, USA ) traceability.
Rad check meter is calibrated upto 15% accuracy for readings above 100 µR/hr.
24Q) Whether this Rad Check meter measure natural background radiation accurately at any Place?
A) No, this gives a background reading slightly lower than the actual natural BG. This reading we can call it as
the base value. Rad check meter is designed to be more sensitive on the front face of the detector so that it can
detect Radioactive Contamination(RaC) from a longerdistance compared to anordinary Micro-R-Surveymeter.
It is for this reason the meter will show less reading of natural BG.
25Q) When do we say that the product under inspection is contaminated?
A) If you are making measurement with Rad Check Meter & if the reading (when you touch the component
closely with meter) goes even slightly higher than the background then one can declare that component as
contaminated.
Even, if the reading remains equal to BG or goes marginally lower than BG when you touch front face of the
meter to the sample under test then also it is a case of suspected contamination. Under this condition checkup
more thoroughly & it could be a case of low level contamination.
Best way is to take more mass or material & touch the meter close to the mass & if the reading increases than
the previous one then it is a contamination case.
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