«But there are huge amounts of
radionuclides in these tanks and the water may have to be stored for a long time to come.
«Recently, the deposition rates have been boosted by the resuspension
of radionuclides in deposited particles, the 239,240 Pu content of which may originate from dusts from the East Asian continent deserts and arid areas.
Dipole intensity estimates from
cosmogenic radionuclide production records, with suitable filtering to minimise the solar influence, have also been included in the comparison to provide independent information about variations in the strength of the geomagnetic field.
Although there is no direct way to separate solar from geomagnetic influences in
radionuclide production records, it is instructive to compare their variations to geomagnetic field reconstructions.
The center will focus on several initiatives, specific to the SNMMI Strategic Plan Goal C: Increase Appropriate Utilization of
Radionuclide Therapy within the first year:
The Analytical Chemistry Branch is currently working with an Ontario company to demonstrate the capabilities of their water treatment technology for removal of
radionuclides from various nuclear process systems and waste streams.
We normalised the cosmogenic
radionuclide records in order to obtain the same average geomagnetic field intensity as indicated by the CALSxk.x models for the studied time intervals.
EID News - news release, Elevated
radionuclide levels found in cattle grazing near uranium mines & mills, June 17, 1986.
«(3) evaluate the regulatory adequacy of health and safety standards
for radionuclide release from recycling facilities and recycled fuel fabrication facilities;
[1] This blog is written on the day of the test, some important technical details, especially as they relate to
radionuclide release — which can identify isotopes, will take several days to emerge.
Experiments have shown that certain microbes can make use of
radionuclides such as uranium and neptunium in place of oxygen.
Ongoing
radionuclide monitoring and tracking efforts are required following the nuclear accident at the Fukushima Daiichi Nuclear Power Plant.
«So the contamination of long -
lived radionuclides in different organisms in the local marine food webs needs to be monitored continually.»
There are many
different radionuclides that scientists use as «clocks» to measure how fast the ocean mixes different water masses and sediment accumulates on the seafloor.
The figure shows that the agreement between the two geomagnetic or the two
radionuclide reconstructions, respectively, is better than between the results from the different methods.
Two weeks after the DPRK «s nuclear test, the IMS
radionuclide station at Yellowknife, Canada, registered an increase of the level of the radioactive noble gas xenon.
Pearce, who came to the Laboratory in 2009, is investigating how minerals and microbes affect technetium and
other radionuclides in the soil at a former plutonium production site in southeastern Washington State.
Finally, we include a comparison to past geomagnetic field estimates obtained with multi-centennial to millennial - scale filtering from 14C and
10Be radionuclide production records.
This is essential when
using radionuclide production rates to infer past solar activity, which is of high interest to reveal the solar influence on Earth's climate variability (e.g., Marsh & Svensmark 2003; Solanki et al. 2004; Muscheler et al. 2005b; Usoskin et al. 2006; Snowball et al. 2007).
A total of seven patients went on to have primary tumors surgically removed, and another patient was treated with peptide
receptor radionuclide therapy.
This method, known as
targeted radionuclide therapy, or TRT, involves the use of molecules labeled with radioactive atoms that are injected into patients and localized in cancer cells.
«Nowhere are the detection requirements more daunting than in sensing alpha - and beta -
emitting radionuclides in water, as the detection limits are extremely low, and these materials must be very close to the sensor for their radioactivity to be detected,» said PNNL Fellow Grate.
The Indian Point nuclear power plant has a long history of accidental radioactive leaks and spills: spent fuel pools at the plant housing toxic nuclear waste have been leaking since the 1990s; corroded buried pipes have sprung radioactive leaks; tanks have spilled hundreds of gallons radioactively contaminated water; and malfunctioning valves and pumps have
leaked radionuclide - laden water.
«This study showed that intrinsic colloids formed by interactions between soluble Cerium (Ce) and carbonates significantly increase the mobility of Ce injected into a carbonate rock fracture,» explains BGU Zuckerberg Institute for Water Research Director Prof. Noam Weisbrod, Ph.D. «The formation of intrinsic colloids, if not accounted for, could result in the under prediction of
radionuclide migration through fractures in fine - grained carbonate bedrock, such as chalk.»
The International Monitoring System (IMS), established by the Comprehensive Nuclear - Test - Ban Treaty, has a number of different ears to the ground to detect clandestine nuclear weapons testing: seismic networks that listen for terrestrial shock waves, hydroacoustic networks that scan the oceans for sound waves, and
radionuclide networks to sniff out radioactive particles that nuclear explosions produce.
To track changes in coastal waters and predict when seafood species in the region may be safe to consume, it will be necessary to establish a «temporal data set» — that is, to measure the levels and distributions of
contaminant radionuclides at a given location over time, he says.
Burnett's research focuses on the measurement and description of both natural (uranium / thorium decay series) and
artificial radionuclides in the environment.
The model's validity is also tested using the cosmogenic
radionuclides 14C and 10Be stored in terrestrial archives.
«Determining the specific impact of intrinsic colloid formation by radioactive elements can aid in the development of migration models predicting
radionuclide transport on a field - scale,» says Prof. Weisbrod.
From developing the first accelerator mass spectrometer for use in the biology field to
tracking radionuclides from the Dai - ichi Nuclear Power Plant disaster, the Laboratory's Center for Accelerator Mass Spectrometry (CAMS) has spent 25 years in the spotlight of not only dating ancient artifacts...
«Molecular imaging of neuroendocrine tumors optimizes radiotherapy dose: Study shows the use of PET and SPECT tailors
radionuclide treatment for neuroendocrine cancer patients and reduces the risk of toxicity.»
Analyzing fish and other seafood, for example, tells us how much radiation a person or other marine animal might be exposed to by eating the contaminated organism, but it does not tell us how far the plume has spread from Fukushima or the concentration of the
various radionuclides in the water where the organism was exposed.
Fossil fuel combustion has dispersed fly ash particles worldwide, pretty well coincident with the peak distribution of the «bomb spike» of
radionuclides generated by atmospheric testing of nuclear weapons, Dr Waters says.
Another option is to create packing materials where each particle has both scintillating properties and the ability to selectively
capture radionuclides.
In recent years, as increasingly sophisticated techniques, such as
radionuclide imaging techniques and the measurement of coronary endothelial function, have been applied to the laboratory study of acute stress, an understanding has emerged as to how such acute stress causes deleterious effects in CAD patients, as schematized in Figure 3 ⇓ and elucidated below.
Thyroid imaging typically reveals decreased or even absent
radionuclide uptake in dogs with hypothyroidism (thyroid gland is not visible on the scan).
Many of the foods you eat, beverages you drink, and even the air you breathe
contain radionuclides such as Potassium - 40 and Carbon - 14.
The DOE contends that present designs for engineered and natural barriers will keep HLW and TRU isolated despite water movement, earthquakes or impacts from giant meteors; and it will emit a minimum of
radionuclides if accidentally drilled into.
It was previously thought that only volatile,
gaseous radionuclides such as caesium and iodine were released from the damaged reactors.
This is a time of unparalleled opportunities in areas as diverse as
radionuclide biology, computer science, and computational and cognitive neuroscience.
«Cesium is one of the
dominant radionuclides that was released in unprecedented amounts with contaminated water from Japan's Fukushima Daiichi nuclear power plant following the March 11, 2011, earthquake and tsunami,» says Buesseler.
In the aftermath of the Soviet Union's April 1986 Chernobyl nuclear accident, which
spewed radionuclides over a swath of Europe, «there was no continuity, no overarching panel looking at how science should be done,» says Ronald Chesser, a radiation biologist at Texas Tech University in Lubbock.