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exposure thorium

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Atmospheric thorium pollution and inhalation exposure in ...

 · Atmospheric thorium samples were grouped into four classes according to the sampling time and zones. One real hotspot was observed at a sampling location near a rare-earth company. The results of the inhalation exposure emphasize the importance and significance of …

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Pancreatic Cancer

 · His daughter, my great aunt, who was born in Camden, also died of Pancreatic Cancer. Thorium, Radium and Uranium were the toxic and radioactive metals produced by the Welsbach & General Gas Mantle facilities in Camden between 1880 and 1942. Studies show that inhaling thorium dust causes an increased risk of developing cancer of the pancreas.

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NRC: 10 CFR Part 20—Standards for Protection Against Radiation

 · (e) If a license condition cites provisions in requirements in the standards for protection against radiation in effect prior to January 1, 1994 1 and there are no corresponding provisions in §§ 20.1001-20.2402, then the license condition remains in force until there is a technical specification change, license amendment, or license renewal ...

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Final reports on PT 105-551-A and Supplement A, ``High ...

@article{osti_10122211, title = {Final reports on PT 105-551-A and Supplement A, ``High exposure thorium`` and PT 105-516-A, ``Effects of irradiation of thorium slugs``}, author = {Brugge, R.O.}, abstractNote = {This report discusses Production Test 105-516-A which was written to determine the stability by both measurement and visual examination, of thorium slugs as used in flattening columns ...

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5 Potential Human Health Effects of Uranium Mining ...

Uranium Mining in ia: Scientific, Technical, Environmental, Human Health and Safety, ... The potential for occupational exposure to uranium or thorium and their decay products can vary greatly depending on numerous factors, including the type of ore deposit, uranium grade, mineralogy of deposit, production capacity, uranium mining method ...

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Chemical poisoning -- Thorium Symptoms, Diagnosis ...

Chemical poisoning -- Thorium: Introduction. Chemical poisoning -- Thorium: Thorium is an element used mainly as a nuclear power source and in magnesium alloys, electronic tubes, light filaments and electrodes. Ingestion and other exposures to the chemical can cause various symptoms.

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Thorium As Nuclear Fuel: the good and the bad

Reactors that use thorium are operating on what's called the Thorium-Uranium (Th-U) fuel cycle. The vast majority of existing or proposed nuclear reactors, however, use enriched uranium (U-235) or reprocessed plutonium (Pu-239) as fuel (in the Uranium-Plutonium cycle), and only a handful have used thorium.

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Thorium dioxide | ThO2 - PubChem

Thorium Dioxide is a radioactive crystalline solid compound used in a broad range of industrial applications. Thorium dioxide was utilized as a radiographic contrast agent; however, it is no longer considered safe for use in human patients because it was found to be a carcinogen that can cause cholangiocarcinoma.

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Thorium Metal SDS | IBILABS.com

The toxicity of thorium metal has not been quantified. Thorium may be a skin, eye, and mucous membrane irritant, as well as a nephrotoxin. Thorium metal usually does not constitute an external radiation exposure hazard since it emits mainly alpha-radiation at a low energy level.

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Humor: The 'horrifying' truth about radioactive lenses ...

 · Measurements have indicated that the exposure rate at a depth of 10 cm in the body of an individual carrying a camera containing 0.36 uCi of thorium would be approximately 0.01 mrem/hr. Based on this value, NUREG-1717 calculated that a serious photographer might receive an annual exposure of 2 mrem.

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Information Notice No. 92-34: New Exposure Limits for ...

 · Information Notice No. 92-34: New Exposure Limits for Airborne Uranium and Thorium UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS WASHINGTON, D.C. 20555 May 6, 1992 Information Notice No. 92-34: NEW EXPOSURE LIMITS FOR AIRBORNE URANIUM AND THORIUM Addressees: All licensees whose operations can cause airborne concentrations of uranium and thorium.

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THORIUM DIOXIDE HAZARD SUMMARY Thorium Dioxide

THORIUM DIOXIDE page 3 of 6 * If there is the possibility of skin exposure, emergency shower facilities should be provided. * On skin contact with Thorium Dioxide, …

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Radon Poisoning: Symptoms, Risk Factors, and More

 · Radon is a naturally occurring radioactive gas. It's produced when uranium, thorium, and radium break down in soil, rock, and water. It's then released into the air. Radon is odorless ...

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Thorium Oxide | AMERICAN ELEMENTS

Thorium Oxide is a highly insoluble thermally stable Thorium source suitable for glass, optic and ceramic applications. Thorium Oxide is generally immediately available in most volumes. Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards.

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Thorium Toxicity - Chelation Medical Center LLC

Thorium (Th) Because most thorium salts are excreted via urine, a high urine thorium level indicates exposure and probably increased body burden of this element. Thorium is considered mildly toxic for two reasons, low-level radioactivity and slight biochemical toxicity. Thorium is a radioactive element having 7 isotopes with half lives that ...

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Environmental Medicine: Integrating a Missing Element into ...

Exposure to arsenic, thorium, and copper may also cause portal hypertension without cirrhosis. Findings of capsular and sub-capsular fibrosis are suggestive but not diagnostic of vinyl chloride exposure. Neurologic Effects ... Washington, DC: The National Academies Press. …

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Thorium Oxide | AMERICAN ELEMENTS

Thorium Oxide is a highly insoluble thermally stable Thorium source suitable for glass, optic and ceramic applications. Thorium Oxide is generally immediately available in most volumes. Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards.

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NRC: 10 CFR Part 20—Standards for Protection Against Radiation

 · (e) If a license condition cites provisions in requirements in the standards for protection against radiation in effect prior to January 1, 1994 1 and there are no corresponding provisions in §§ 20.1001-20.2402, then the license condition remains in force until there is a technical specification change, license amendment, or license renewal ...

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ATSDR - ToxFAQs™: Thorium

 · Thorium is a radioactive substance that occurs naturally in the environment. It has been shown to cause an increase in cancers of the lung, pancreas, and blood in workers exposed to high levels of it in the air. This chemical has been found in at least 16 of the 1,177 National Priorities List sites identified by the Environmental Protection Agency (EPA).

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Metals and Controls Corp. Thorium and Welding Exposure …

White Paper Metals and Controls Corp. Thorium and Welding Exposure Model April 8, 2019 Page 3 of 9. This is a working document prepared by NIOSH's Division of Compensation Analysis and Support (DCAS) or its contractor for use in discussions

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Radionuclide Basics: Thorium | Radiation Protection | US EPA

Most people are not exposed to dangerous levels of thorium. However, people who live near thorium mining areas or near certain legacy industrial facilities may have increased exposure to thorium. Occasionally, items may be found with thorium in them, such as some older ceramic wares in which uranium and thorium were used in the glaze.

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OSHA Annotated PELs | Occupational Safety and Health ...

Permissible Exposure Limits – Annotated Tables. OSHA recognizes that many of its permissible exposure limits (PELs) are outdated and inadequate for ensuring protection of worker health. Most of OSHA's PELs were issued shortly after adoption of the Occupational Safety and Health (OSH) Act in 1970, and have not been updated since that time.

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5 Potential Human Health Effects of Uranium Mining ...

Uranium Mining in ia: Scientific, Technical, Environmental, Human Health and Safety, ... The potential for occupational exposure to uranium or thorium and their decay products can vary greatly depending on numerous factors, including the type of ore deposit, uranium grade, mineralogy of deposit, production capacity, uranium mining method ...

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Thorium - HPS Chapters

Thorium is generally a health hazard only if it is taken into the body. External gamma exposure is not a major concern because thorium emits only a small amount of gamma radiation. Although thorium-229 has a much higher gamma component than either thorium-232 or thorium-230, thorium-229 comprises a very small fraction of natural thorium.

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Study may help explain link between uranium exposure and ...

 · The varying health risks from exposure to natural uranium are well established, but Diane Stearns, professor of biochemistry at Northern Arizona University, and her team have been trying to determine if there is a link between uranium exposure and skin cancer, stating that skin may have been overlooked in the past.

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Thorium Dioxide Toxicity (hazard)

C-Contaminated work clothes should be laundered by individuals who have been informed of the hazards of exposure to Thorium Dioxide. D-If there is the possibility of skin exposure, emergency shower facilities should be provided. E-On skin contact with Thorium Dioxide, immediately wash or shower to remove the chemical.

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THORIUM NITRATE HAZARD SUMMARY WORKPLACE …

* Thorium Nitrate can irritate the skin causing a rash or burning feeling on contact. * Exposure to Thorium Nitrate can irritate the eyes, nose, and throat. * Exposure can reduce the ability of the bone marrow to make blood cells. * Repeated exposure to Thorium Nitrate may affect the liver and kidneys and cause scarring of the lungs.

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Periodic Table of Elements: Thorium Facts - ThoughtCo

 · Properties: Thorium has a melting point of 1750°C, boiling point ~4790°C, specific gravity of 11.72, with a valence of +4 and sometimes +2 or +3. Pure thorium metal is an air-stable silvery white which can retain its luster for months. Pure thorium is soft, very ductile, and capable of being drawn, swaged, and cold-rolled.

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Humor: The 'horrifying' truth about radioactive lenses ...

 · Measurements have indicated that the exposure rate at a depth of 10 cm in the body of an individual carrying a camera containing 0.36 uCi of thorium would be approximately 0.01 mrem/hr. Based on this value, NUREG-1717 calculated that a serious photographer might receive an annual exposure of 2 mrem.

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Final reports on PT 105-551-A and Supplement A, ``High ...

@article{osti_10122211, title = {Final reports on PT 105-551-A and Supplement A, ``High exposure thorium`` and PT 105-516-A, ``Effects of irradiation of thorium slugs``}, author = {Brugge, R.O.}, abstractNote = {This report discusses Production Test 105-516-A which was written to determine the stability by both measurement and visual examination, of thorium slugs as used in flattening columns ...

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