NUCLEONIX SYSTEMS RC 705E Instruction Manual page 39

41Q) Allowable limits of contamination being less than 0.1 Bq/gm, where as Rad Check meter measures in µR/hr
or nSv/hr mode only?. How one can one correlate or come to conclusion that the contamination is less than
0.1Bq/g? (of course in other European countries acceptable level is less than 0.5Bq/g).
A) This is partly answered in the previous QA 40. We would request you to go through our website,
Information about case studies, thoroughly.
Quality Control person has to know how to identify a component as
a) Clean (BG falls more than 12% on contact with sample)
b) Contaminated or (increases more than BG)
c) Suspected contamination case (BG falls marginally up to 8% or remains same on touching the
In (a) & (b) cases, it is easily identifiable by Rad check meter. of course the sample size, thickness, mass criteria
etc should be ensured, it should cover the front face of the detector completely when you touch the detector to
the component (If the components are small in size, then you can group them to make about 2/3 kg, put them
in a plastic pouch & cover complete front face of the detector).
To identify suspected contamination we have also given criteria. In such a situation, by going through our
case studies reports & by making proper measurements & analysis one can perhaps say intuitively that
contamination is less than 0.1Bq/g. Butfor exact quantification one has to go through analysis by Radioactive
Contamination Analyzer (Bq/gm System) method only. Analysis by Radioactive Contamination Analyzer (Bq/
gm System) Bq/g method for exact quantification is 100% authentic & foolproof. In case you encounter
suspected contamination case, then you can send such type of suspected samples of about 1 kg from each
'heat" for analysis to our Radio-analytical lab.
Another important thing is all the Steel mills and also the foundries who have furnaces at their factory can
purchase Radioactive Contamination Analyzer (Bq/gm System) install it at their QC department, which
becomes an important analytical tool. And it will help in identifying & quantifying in Bq/g. Simply what they
need to do is from each heat they have totake about one kg sample & put it for analysis to identify and quantify
the contamination in bq/g .They can do self certification. As part of their QC. Already more than companies
have purchased our systems for this purpose. This they can issue certificate to all their customers when they
supply their products (Billets, Bars, flats, Castings etc).
ABOUT AUTHOR:
Sri. J. Narender Reddy, Founder & Managing Director of M/s. Nucleonix Systems Private Limitedholds master's
degree in Engineering with specialization of advanced Electronics from Jawaharlal Nehru Technology
University, Hyderabad. Authorized more than TEN technical papers & presented in National seminars &
Symposia. Is a Lifememberof Quitea few professional bodiessuchas Indian Nuclear Society, Indian Association
for Radiation Protection, Indian Society for Radiation Physics, etc. Successfully executed several large-scale
projects, Responsible for development of several first-of-its-kind products at Nucleonix systems.
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