at planet scale started in 1945 when the first nuclear taste was performed in
Alamo Gordo, New Mexico, followed by two war actions in Japan, a second test in
Bikini, and more than 2000 tests were performed all over the world by different
countries since then on. In this context, 10 main accidents in power and
research nuclear reactors seem to be negligible in the general radioactive
contamination at planet scale, which can be measured by comparing radioactivity
of fission product 137Cs with that of natural 40K, both
detected from marine sediments taken up at different places and depth. This
paper shows 9 results obtained from Gulf of Mexico samples and one from Pacific
North ocean, confirming the fact that this simple method works well enough to
keep watching the process of radioactive contamination on earth, whatever may
be the cause, to prove if it remains constant for a time, by equilibrium
between contamination and decaying of 137Cs, it is decreasing at
same rate than 137Cs radioactive decaying, or by the contrary, it is
growing up and approaching at some extent the natural radioactivity from 40K.
Cite this paper
Navarrete, M. , Zúñiga, M. , Espinosa, G. and Golzarri, J. (2014) Radioactive Contamination Factor (RCF) Obtained by Comparing Contaminant Radioactivity (137
Cs) with Natural Radioactivity (40
K) in Marine Sediments Taken up from Mexican Sea Waters. World Journal of Nuclear Science and Technology
, 158-162. doi: 10.4236/wjnst.2014.43020
 Navarrete, M., Golzarri, J., Espinosa, G., Müller, G., Zúniga, M. A. and Camacho, M. (2011) Radioactivity in Marine Salts and Sediments. In: Radioisotopes, Applications in Physical Sciences, Chap. 12, InTech, Croatia, 225-246.
 Navarrete, J.M., Müller, G., Golzarri, J.I. and Espinosa, G. (2011) Establishment of a Radioactive Contamination Index in Seawater from the Gulf and Pacific Coasts in Mexico. International Journal of Environment and Health, 5, 318-323. http://dx.doi.org/10.1504/IJENVH.2011.044143
 Navarrete, J.M., Zúniga, M.A., Espinosa, G. and Golzarri, J.I. (2012) Assessment of Present and Future Radioactive Contamination at Global Scale. Journal of Chemistry and Chemical Engeneering, 6, 1010-1015.
 Navarrete, J.M. and Müller, G. (2010) Natural Radioactivity and Radioactive Contamination in Sea Water. In: Radioactive Contamination Research Developments, Chap. 8, Nova Science Publishers, Inc., 270-274.
 Lavi, N., Groppi, F. and Alfassi, Z. (2004) On the Measurement of 40K in Natural and Synthetic Materials by the Method of High Resolution γ Ray Spectrometry. Radiation Measurements, 38, 139-143. http://dx.doi.org/10.1016/j.radmeas.2003.11.005
 Choppin, G.R. and Rydberg, J. (1980) Nuclear Chemistry, Theory and Applications. Pergamon Press, Pergamon, 567-568.