Tritium water dating 2016 arabu online dating site
The Chernobyl and Fukushima meltdowns let loose plenty of tritium, but so have a seemingly endless series of leaks at aging reactors in the U. The agency’s recent announcement in the Federal Register notes that tritium levels as high as 3.2 million picocuries per liter (p Ci/L) in ground water have been reported to the U. Nuclear Regulatory Commission (NRC) at some nuclear facilities.
(A curie is a unit of radiation emission; a picocurie is one trillionth of a curie.) That is 160 times higher than the standard set back in 1977 by the fledgling EPA—and the NRC has made measurements even higher at some nuclear facilities.
The NRC has also focused on evaluating the plants' abilities to analyze how spills or leaks could affect groundwater.
The agency's resident inspectors at every operating U. nuclear power plant regularly monitor all these activities.
Tritiated water contains the radioactive hydrogen isotope tritium.
On the one hand, there is evidence that the risk from tritium is negligible and current standards are more than precautionary.
On the other, there is also some evidence that tritium could be more harmful than originally thought.
In contrast to traditional tritium dating, we do not refer directly to tritium concentrations in precipitation as input function, but to an infiltration-weighted annual mean of the rainwater values.
Using concentration differences between this infiltration-weighted mean and the drip water, an age is calculated from the radioactive decay law, assuming piston flow.
Or, as a health physicist who has studied tritium for years observes, in the 1970s, the EPA did not rely on any health studies in setting its original standards.