Impact of the Fukushima Accident on ³H and ¹⁴C Environmental Levels: A Review of Ten Years of Investigation.

This discrepancy between the radionuclides is mainly caused by the present background, which is almost negligible in the case of radio-cesium, while the nuclear weapon test legacy and the natural production of 3 H and 14 C are quite significant and can make a fresh anthropogenic signal difficult to detect.

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