Tracing interaquifer connections in the Kefar Uriyya-Agur region (Israel), using natural uranium isotopes

The soil-to-plant transfer factors of natural uranium isotopes (238U and 232Th) were studied in Luong My tea farm, Tan Thanh district, Luong Son commune, HoaBinh province. The activity concentrations in leaves, trunk and root were determined for the tea tree at no harvest period (winter break). The measurements were carried out using gamma spectroscopy with high puritygermanium detector HPGe. Research results show that the activity of 238U and 232Th is higher in leaves than in trunk and roots.Soil-leaves transfer factor (TF) for238U and 232Th were as follows:TFU238 = 0,52 – 0,87; TFTh-232 = 0,25 – 0,43.

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Offsets and inputs of natural uranium isotopes in the Mediterranean Sea

10.5194/egusphere-egu2020-20226 ◽

2020 ◽

Author(s):

Evan Border ◽

Norbert Frank ◽

Pieter van Beek ◽

Gideon Henderson ◽

Joseph Tamborski

Keyword(s):

Mediterranean Sea ◽

Black Sea ◽

Submarine Groundwater Discharge ◽

Mediterranean Coast ◽

Natural Uranium ◽

Water Masses ◽

Precision Measurements ◽

Global Ocean ◽

Uranium Isotopes ◽

The Mediterranean

High precision measurements of natural uranium isotopes in the Atlantic Ocean, Mediterranean Sea, and Black Sea reveal isotopic makeups which differ significantly from the well-known oceanic composition. In the Mediterranean, water masses are strongly differentiated to the extent that they are able to be fingerprinted on the basis of &#948;234U. Mediterranean deep water masses show the highest enrichment, with an offset with respect to oceanic &#948;234U values of just over 1 &#8240;. The Black Sea shows an even higher offset of up to ~40 &#8240;. This offset provides an opportunity to look into the as of yet largely unstudied uranium inputs to the Mediterranean, in particular rivers and submarine groundwater discharge (SGD), which are thought to play key roles in uranium input to the global ocean. A simple box model, incorporating the Mediterranean and Black Sea data from this study is constructed to provide a first estimate of the U concentration and &#948;234U signature of rivers and SGD necessary for this offset to arise. These estimates are then compared with new measurements of various coastal and submarine springs from along the French Mediterranean Coast as well as with existing riverine data exists to speculate on which inputs may be most responsible for this offset.

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Natural uranium isotopes determination in 24h-urine samples from exposed workers to enriched uranium

Radiation Physics and Chemistry ◽

10.1016/j.radphyschem.2020.108929 ◽

2020 ◽

Vol 174 ◽

pp. 108929

Author(s):

P. Albendea ◽

I. Sierra ◽

C. Hernández ◽

A.I. Barrado ◽

A. Yllera

Keyword(s):

Natural Uranium ◽

Urine Samples ◽

Uranium Isotopes ◽

Exposed Workers ◽

Enriched Uranium

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Uranium and radium in water samples around the Nikola Tesla B lignite-fired power plant - Obrenovac, Serbia

Nuclear Technology and Radiation Protection ◽

10.2298/ntrp1101011z ◽

2011 ◽

Vol 26 (1) ◽

pp. 11-17 ◽

Cited By ~ 1

Author(s):

Zora Zunic ◽

Jerzy Mietelski ◽

Sanja Radanovic ◽

Renata Kierepko ◽

Giancarlo Ciotoli ◽

...

Keyword(s):

Power Plant ◽

Water Samples ◽

Thermal Power Plant ◽

Thermal Power ◽

Natural Radionuclide ◽

Natural Uranium ◽

Uranium Isotopes ◽

Activity Concentrations ◽

Nikola Tesla ◽

Radium Activity

This paper deals with the analysis of natural radionuclide content in 23 water samples collected in the vicinity of the Nikola Tesla B thermal power plant, Serbia. All samples were analyzed for 226Ra and uranium isotopes (238U, 234U) activity using radiochemical methods and alpha spectrometry. Obtained results show that the activity concentrations for uranium and radium in the water around the thermal power plant are low when compared to those from areas across Serbia with their enhanced natural uranium and radium content. No important radiological hazard related to uranium and radium activity stored in heap was found.

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