uranium thorium site

Home Page - Uranium Minerals

Another valuable source of information of the geochemistry of uranium and thorium minerals is the U.S. Geological Survey bulletin 1064, Systematic Mineralogy of Uranium and Thorium. Dana's New Mineralogy has proven to be very valuable in verifying much of the data listed in this site. The best reference that I have found, to date, is Minerals ...

Radioactivity : Uranium and thorium families

Descendants of uranium 238 The radioactive offsprings of uranium and thorium are partly responsible for a fraction of natural radioactivity. Traces of uranium descendants can be found in uranium ores, with 0.34 grams of radium and 0.0000012 milligrams of polonium found in every ton of uranium.

Natural Decay Series: Uranium, Radium, and Thorium

Uranium, Radium, and Thorium Uranium, radium, and thorium occur in three natural decay series, headed by uranium-238, thorium-232, and uranium-235, respectively. In nature, the radionuclides in these three series are approximately in a state of secular equilibrium, in which the activities of all radionuclides within each series are nearly equal.

Thorium Reactors: An Improvement Over Uranium?

Introduction. Thorium reactors have been the subject of optimistic hype in recent years, with claims that they would be safer, produce less hazardous waste, be easier to find fuel for, and be harder to use for nuclear proliferation than traditional light-water uranium reactors.

U.S. EPA URANIUM AND THORIUM MILL TAILINGS …

uranium and thorium milling 40 CFR Part 192 issued under authority of Uranium Mill Tailings Radiation Control Act. Establishes health and environmental protection standards utilized by the NRC and its Agreement States, and DOE for their oversight of uranium and thorium extraction facility licensing, operations, sites, and wastes

Uranium Thorium Dating

9 Uranium-Thorium dating is based on the detection by mass spectrometry of both the parent …

(PDF) Treatment of Uranium and Thorium Chips at the DOE ...

An audit was conducted at the Perma-Fix site to ensure that the uranium and thorium chips would be treated (1) within appropriate industrial safety and hygiene practices, (2) via appropriate process technologies, and (3) in compliance with the pertinent regulatory framework. Table 1.

3-6: Uranium Thorium dating

Uranium-Thorium clockwork Uranium-Thorium dating is an absolute dating technique which uses the properties of the radio-active half-life of the two alpha emitters 238U and 230Th. The half-life of 238U is T 1/2=4,470,000,000 y. The half-life of 230Th is comparably short, only T 1/2=75,380 y. When the amounts of uranium and thorium are compared ...

Uranium–thorium dating - Wikipedia

Uranium–thorium dating, also called thorium-230 dating, uranium-series disequilibrium dating or uranium-series dating, is a radiometric dating technique established in the 1960s which has been used since the 1970s to determine the age of calcium carbonate materials such as speleothem or coral. Unlike other commonly used radiometric dating techniques such as rubidium–strontium or uranium ...

Glossary of Uranium- and Thorium-Bearing Minerals

uranium or thorium as major constituents; B, minerals that contain minor amounts of uranium or thorium; and C, minerals that probably do not contain uranium or thorium, but which have been reported to contain impurities or intergrowths of uranium or thorium minerals. Many of the minerals listed are'highly variable in composition, some ...

Active Uranium or Thorium Processing Site Law and Legal ...

Active Uranium or Thorium Processing Site Law and Legal Definition. According to 10 CFR 765.3 [Title 10 Energy; Chapter III Department of Energy; Part 765 Reimbursement for Costs of Remedial Action at Active Uranium and Thorium Processing Sites; Subpart A -- General], active uranium or thorium processing site or active processing site means ...

Uranium Thorium Dating

Uranium-Thorium dating is based on the detection by mass spectrometry of both the parent (234 U) and daughter (230 Th) products of decay, through the emission of an alpha particle.The decay of Uranium 234 to Thorium 230 is part of the much longer decay series begining in 238 U and ending in 206 Pb. For Uranium-Thorium dating, the initial ratio of 230 Th/ 234 U at the time of sample formation ...

Thorium - World Nuclear Association

Thorium is much more abundant in nature than uranium. Thorium can be used as a nuclear fuel through breeding to uranium-233 (U-233). When this thorium fuel cycle is used, much less plutonium and other transuranic elements are produced, compared with uranium fuel cycles. Several thorium-fuelled reactor concepts are under consideration.

Is thorium cleaner than uranium? - Quora

Answer (1 of 3): Fission nuclear power plants are cleaner than all other sources of electrical power. They use the least resources and can keep all of any waste products on site. They can enough fuel on site to continue to produce power for years. They can operate for 50 to more than 100 years wi...

Uranium or Thorium : nuclear - reddit

Uranium or Thorium. Close. 13. Posted by 1 year ago. Archived. Uranium or Thorium. Recently got interested in nuclear....I'm intrigued by thorium - is it all hype or legit? ...

Thorium-based nuclear power - Wikipedia

Thorium-based nuclear power generation is fueled primarily by the nuclear fission of the isotope uranium-233 produced from the fertile element thorium.A thorium fuel cycle can offer several potential advantages over a uranium fuel cycle — including the much greater abundance of thorium found on Earth, superior physical and nuclear fuel properties, and reduced nuclear waste production.