SYRIAN ARAB REPUBLIC ATOMIC ENERGY COMMISSION ...

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SYRIAN ARAB REPUBLIC ATOMIC ENERGY COMMISSION ( AECS ) DAMASCUS, P.O. BOX 6091 SY0000789 REPORT ON SCIENTIFIC FIELD STUDY DEPARTMENT OF PROTECTION AND SAFETY POLONIUM210 AND LEAD210 IN SYRIAN SEA AND LAKE FISH AND THE DOSE DUE TO THEIR INTAKE DR. M. S. AL-MASRI MR. S. MAMISH MR. Y. BUDEIR MR. A. NASHWATY AECS-PR\RSS 237 SEPTEMBER 1998 31/43 .

Transcript of SYRIAN ARAB REPUBLIC ATOMIC ENERGY COMMISSION ...

SYRIAN ARAB REPUBLICATOMIC ENERGY COMMISSION ( AECS )

DAMASCUS, P.O. BOX 6091

SY0000789

REPORT ON SCIENTIFIC FIELD STUDYDEPARTMENT OF PROTECTION AND SAFETY

POLONIUM210 AND LEAD210 IN SYRIAN SEA AND LAKE FISHAND THE DOSE DUE TO THEIR INTAKE

DR. M. S. AL-MASRIMR. S. MAMISHMR. Y. BUDEIRMR. A. NASHWATY

AECS-PR\RSS 237 SEPTEMBER 1998

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Carvalho, F. P. 210Po in Marine Organisms: A Wide Rang of Natural RadiationDose Domains, Radiation Protection Dosimetry, (1988), 24,113,117

Cherry, R. D., Hyraud, M. and Rindfuss, R. Polonium210 in Teleost Fish and inMarine Mammals: Interfamily Differences and Possible Association BetweenPoloniumHO and Red Muscle Content, J. Environ. Radioactivity (1994), 24,273-291.

Dahlgaard, H. Po!onium210 in Mussels and Fish from the Baltic North SeaEstuary. .1. Environ. Radi^nclivily, (1 996), 32-91-96.

I ieyraud. M, Cherry R. D.. . Oscadleus H. D., Augustyn, C. J., Cherry M. I., andScaly J. C . Polonimu210 and Lead210 in Edible Molluscs from near the Crapeof Good Hopes. Environ. Radioactivity 24(1994) 253-272

IAEA, International Basic Safety Standards for Protection against IonizingRadiation and for the Safety of Radiation Sources, Safety Series, No.115,Vienna, 1996.

IAEA, Sources of Radioactivity in the Marine Environment and TheirRelative Contributions to Overall Dose Assessment from MarineRadioactivity (MARDOS), IAEA-TECDOC-838, October 1995.

Kauranen, P. and Miettinen, J. K., Polonium2I0 and Radio Lead210 in SomeAqueous Ecosystems in Finland, In Symposium on Biology and Ecology ofPolonium and Radio Lead, Sutton, April 30 to May 1, 1970.

Lamberchts, A., Foulquier, L. and Gariner-Laplace, J., Natural Radioactivity inthe Aquatic Component of the Main French Rivers, Radiation ProtectionDosimetry, (1992), 45, 253-256

Noshkin, V. E., William, L., Robison, and Wong, K. M. Concentration of 2l0Poand 210Pb in the Diet at the Marshall Island, The Science of the TotalEnvironment. (1994), 155,87-104

Othman, I., Al-Masri, M. S., Mograbi, M. and Skhitta, KH, Uranium Levels inSome Syrian Agricultural Products, AECS-PRYRSS 223, June 1998.

Pietrzak, Z., chrzanowski, E., and Dembinska S., Intake of 226Ra, 210Po and 210Pbwith Food in Poland, The Science of the Environment, (1997),203,157-165

Rello, S. V. N., Camplin, W. C, Alington, D. J. and Young, A. K. NaturalRadionuclides in the UK Marine Environment, Radiation Protection Dosimetry(1992)45,203-209

Saito, R. T., Cunha, I. I. T., Analysis of 210Po in Marine Samples, J. RadioanalNucl. Chem. (1997), 220,1,117-119

Shahul, P., K. Shaheed, S. S. and Somasundarm, N., Bioaccumulation of 2!0Po inthe Kaveri River Ecosystem. India, J. Environ. Radioactivity.(1997), 37, 17-27

10

Shakla, V. K., Menon, M. R., Ramachandran, TV, Saelher, A. P. and Migorani, M.,Natural and Fallout Radioactivity in Milk and Dust Samples in Bombay andPopulation Dose Rate Estimates, J. Environment Radioactivity (1994), 25, 229Skwarzec, B. and Falkowski. Accumulation of " Po in Baltic Invertabrates, J.Environ. Radioactivity, (1988), 8, 99-109

Smith, J. and Towler., P. H. Polonium210 in Cartilaginous Fishes(Chondrichthyes) From South Eastern Australia Waters. Aust. J. Mar.Freshwater Res, (1993),44, 727-33

United Nations Scientific commetti on the Effects of Atomic Radiation, (1988),Sources, Effects and Risks of Ionizing Radiation, United Nations, New York,Ny. USA.

Yamamoto, M, Abe, T., Kuwabara, J., Komura, K. and Takiza, Y., Polonium210and Lead210 in Marine Organisms: Intake Levels for Japanese, J. Radioanal.Nucl. Chem. (1994), 178, 81-90

Yu, K.N., Mao, S.Y., Young, E.C.M. and Stokes, M. J. A Study of Radioactivityin Six Types of Fish Consumed in Hong Kong, Appl. Radiat. Isot. (1997), 48-515-519

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