First proficiency test for the determination of NORM in contaminated soil from the oil field |
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Authors: | Mohammad Saied Al-Masri Abdul-aziz Aba |
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Institution: | (1) Department of Protection and Safety, Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, Syria |
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Abstract: | The Atomic Energy Commission of Syria (AECS), in cooperation with the Arabic Atomic Energy Agency (AAEA), has initiated the
first proficiency test exercise for the determination of naturally occurring radioactive materials (NORM) in contaminated
soil from the oil field. The soil sample was collected from one of the most highly radioactively contaminated lagoons with
production water in the Syrian oil fields, which was then prepared, characterised and certified according to a standard procedure.
Samples were dispatched to laboratories from eight Arab countries; Kuwait, Egypt, Yemen, Tunisia, Jordan, the Kingdom of Saudi
Arabia, Libya and Syria. The results were evaluated using three statistical criteria; z-score, the U
test score and the relative bias. These statistical methods were used to evaluate the performance of each laboratory, in addition
to the overall evaluation for each radionuclide. This evaluation has indicated that 57% and 86% of the results passed the
criteria set for precision and accuracy applied for this test in relation to 226Ra and 228Ra, respectively. These two radionuclides are considered to be the most important radionuclides in the oil industry. |
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Keywords: | Radium-226 Soil Reference sample Proficiency test Oil industry |
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