Evaluation of in vivo and in vitro dose detection limits for different radionuclides and measurement techniques.
Personal monitoring programs for workers handling radioactive materials are influenced by numerous factors as the measurements of radioactivity in tissues or/and in excreta can be carried out using different techniques. This paper summaries the basic procedures needed for accurate and fast measurement of different radionuclides like (235)U, (234)U, (238)U, (226)Ra, (210)Po, (131)I, (99m)Tc, (134)Cs, (137)Cs, (57)Co, (58)Co, and (60)Co. Overviews of in vitro and in vivo monitoring methods are provided as well as methods used to calculate detection limits and internal radiation dose. For the radionuclides of interest, in vivo and in vitro detection limits were converted into committed effective doses to evaluate the applicability and limitations of the systems used at the laboratory. The results proved that the systems' sensitivity is suitable for use in routine monitoring of workers subject to risk of internal exposure from such radionuclides. Consequently, monitoring programs suggested by the Syrian internal dosimetry laboratory are suitable to detect committed effective doses even below 1mSv in most cases.
Department of Protection and Safety, Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, Syria. Electronic address: prscientific2@aec.org.sy.
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Bitar
Department of Protection and Safety, Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, Syria.
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Maghrabi
Department of Protection and Safety, Atomic Energy Commission of Syria, P.O. Box 6091, Damascus, Syria.
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Doubal
D000512:Alpha Particles; D005720:Gamma Rays; D006801:Humans; D057230:Limit of Detection; D016273:Occupational Exposure / Q000032:analysis*; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D000069079:Radiation Exposure / Q000032:analysis*; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D011868:Radioisotopes / Q000032:analysis* / Q000652:urine; D013593:Syria; D013961:Thyroid Gland / Q000528:radiation effects
D011868:Radioisotopes
Detection limits; Internal dosimetry; Occupational exposure; Spectrometry