Traces of the Fukushima accident pollution on India and the Arabic Sea
Dr Alexandru Razvan Petre1, Dr Mihaela Enachescu1, Dr Catalin Stan-Sion1, Dr Doru Gheorghe Pacesila1
1Horia Hulubei National Institute For R&d In Physics And Nuclear Engineering (ifin-hh), Magurele, Romania
We continue with this AMS experiments to establish the pollution outspread from the Fukushima Nuclear Accident (FNA) in 2011, that released radioactive nuclei into the atmosphere and into the ocean waters. Water samples were collected repetitively between 2014 -2019 from rivers of India and from the China Sea and the Arabian Sea and they were measured for the 129I concentration.
AMS measurements of seawater samples from Shanghai had an average concentration 1.3 x 10 7 atoms/L and those collected from Disneyland Hong Kong 1.5 x 10 7 atoms/L. These results are in accordance with the measurements of Liu et al [2016. Sci. 365 Rep. Doi: 10.1038/srep 36611] for seawater of the East Chinese Sea values (0.73 – 3.99) x10 7 atoms/L. Such low concentrations are proofs that no contribution from the Fukushima accident is present. Probably, it is the consequence of the seawater flow blocking towards the China Sea and Yellow Sea produced by the Kuroshio Current. As a result, the actual baseline of 129I concentration for the China Sea is 1.5 x10 7 atoms/L and it is unaffected by the Fukushima accident.
However, the atmospheric outspread from the Fukushima accident 2011 was found in water samples from the rivers in India (Ken River and Gange River) and from the Arabian Sea (offshore Goa).
The Ken River, is considered to have one of the most pure and unpolluted water in India. It is nestled in the Panna Tiger Reserve, a prime tiger-land in the Vindhyan Hills. The measured 129I concentration was 1.8 x 10 8 atoms/L, which is an increased value but similar with that of the Arabian Sea (3.15 x 10 8 atoms/L) in samples collected periodically at 300 m out in the ocean from the Sinquerim Beach, overlooking the Arabian Sea. The averaged value of measured of the 129I concentration was 3.15 x 10 8 atoms/L.
Water samples collected from both locations were influenced by the atmospheric transport from the nuclear pollution sources. The big reprocessing nuclear power plant (NRPP) Tarapur (19.85N 72.7E ) in the Maharashta State of India is at a distance of about 680 km from this location and its contribution cannot be neglected. The Gange River at Varanasy (25.17N 226 82.57E) located in the central India, at a distance of only 372 km from the Tarapur NRPP. The measured radio iodine concentration for the Gange River was 9.94 x 10 7 atoms/L and 2.54 x 10−9 for the isotope ratio. In spite of the smaller distance to the NRPP, this measured concentration is about two times lower than that of the Ken River.
An actual baseline can be assigned for both the continent and the sea water of India at the value (1-2) x 10 8 atoms/L for the 129I concentration, which is ten times higher than the 129 I concentration in the China Sea.
The team has research in diagnosis for fusion experiments on the AMS installation built by itself at the 9MV accelerator, obtaining the in-depth profiling of hydrogen isotopes concentrations in the CFC plates.
At the 1MV accelerator, the team conducted experiments in the field of geology, dating the ages and erosion of mountainous areas and Danube terraces using the isotopes 10Be and 26Al.
For nuclear monitoring there is a project to map the reference level of 129I in Southeast Europe, but also India and China.
The team measured for the first time on a 1MV accelerator 10B and hydrogen isotopes.