Tritium activity levels in environmental water samples from different origins

A follow up of the decrease of non exchangeable organically bound tritium levels in the surroundings of a nuclear research center

“…Since the end of atmospheric testing, environmental tritium levels are slowly returning to their pre-bomb testing level and, nowadays, the tritium activity concentration in precipitation and surface water has almost returned to its pre-bomb level between 1 and 2 Bq L À1 (IAEA, 2009;Palomo et al, 2007;Radwan et al, 2001).…”

Comparison of rapid liquid scintillation multivariate technique with conventional techniques for regular surveillance of water samples

“…For Optiphase HiSafe III, the solvent is diisopropyl naphthalene (DIN), this cocktail is more soluble in the sample, hardly diffuses on the vial walls. For these reasons Optiphase HiSafe III was the scintillation cocktail selected for the study [9,10]. The sample to scintillation cocktail volume ratio used was 8:12 [11].…”

“…The bore well samples were first filtered using Whatman 542 filter paper to remove the suspended material. The distillation process reported by Paloma et al [9] was followed. An aliquot of 8 ml of the distillate was mixed with 12 ml scintillation cocktail counted in the optimized counting channel.…”

Assessment of tritium levels in rivers and precipitation in north-western Greece before the ITER operation

“…Extensive literature has been published on tritium measurements in rivers and river basins used to estimate the residence time of ground water. Recently published papers have provided tritium concentration values in surface waters, in ground waters and also the average tritium concentration measured in precipitation, which did not exceed 2 Bq L −1 or 15 TU (1 Tritium Unit (TU) = 0.11919 Bq L −1 , corresponds to 1 3 H atom per 10 18 H atoms) [14][15][16][17][18][19][20][21][22][23][24][25][26]. A detailed presentation of these values together with the relevant references is contained in Table 1.…”