In addition, the region yielded radiochemical signs of high heats occurring somewhere from 250 to 280 million years ago _ about the time of the great dying at the end of the Permian.
32.
"They have a facility they call their'radiochemical laboratory,'" Oelrich said, " but it's 200 meters long and has six-foot walls.
33.
"One warhead was destroyed by an explosion that occurred on the sub when it was sinking, " said Vesnovskii, who heads the Arzamas-16 lab's radiochemical department.
34.
Researchers at PNNL s Radiochemical Processing Laboratory are developing processes to advance the cleanup of radiological and hazardous wastes; the processing and disposal of nuclear fuels; and the production and delivery of medical isotopes.
35.
At the time, it was thought that this was a new radium isotope, as it was then standard radiochemical practice to use a barium sulfate carrier precipitate to assist in the isolation of radium ..
36.
The fact that the tamper material was uranium enriched in U was deduced based on the final fission reaction fragments detected in the radiochemical analysis, conclusively shown by the U found by the Japanese in the shot debris.
37.
North Korea escalated tensions dramatically Friday by vowing to expel U . N . inspectors monitoring a mothballed nuclear complex north of Pyongyang and to restart a radiochemical laboratory there that could be used to extract weapons-grade plutonium.
38.
In some cases irradiated samples are subjected to chemical separation to remove interfering species or to concentrate the radioisotope of interest, this technique is known as "'Radiochemical Neutron Activation Analysis "'( RNAA ).
39.
The IAEA said its most immediate fear was that North Korea could begin a weapons-making process at a radiochemical laboratory that experts believe could yield several bombs within months, using plutonium from spent fuel rods now in storage.
40.
Qureshi continued his research on nuclear chemistry and took the PhD in nuclear chemistry from the University of Tokyo, with a doctoral thesis on the " Radiochemical separations by Amalgam exchange " which contained fundamental work on chemical amalgam, in 1963.
