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Tuesday, July 28, 2020 | History

3 edition of evaluation of the possible radiation hazard in using thoriated welding electrodes found in the catalog.

evaluation of the possible radiation hazard in using thoriated welding electrodes

R. N. Lichtenstein

evaluation of the possible radiation hazard in using thoriated welding electrodes

by R. N. Lichtenstein

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Published by General Electric, General Engineering Laboratory in [S.l.] .
Written in English

    Subjects:
  • Thorium -- Toxicology,
  • Thorium -- Physiological effect,
  • Electric welding -- Electrodes -- Health aspects,
  • Radiation injuries

  • Edition Notes

    Statementby R.N. Lichtenstein, R. Zendle.
    SeriesTechnical information series -- R55GL344., Technical information series (General Electric Company. General Engineering Laboratory) -- R55GL344.
    ContributionsZendle, R., General Electric Company. General Engineering Laboratory.
    The Physical Object
    Pagination17, [5] leaves :
    Number of Pages17
    ID Numbers
    Open LibraryOL17614855M
    OCLC/WorldCa53043228

      The welding technique most frequently used in the shop is the GMA utilizing a tungsten electrode and argon gas. It is performed on stainless steel, mild steel, and aluminummmagnesium (Fig. 5). The SMA technique applying coated electrodes is used for spot welding of mild ://   Welding is a very common operation in many industries and workplaces [1, 2].According to American Welding Society, it is defined as “a metal joining process wherein coalescence is produced by heating to suitable temperature with or without the use of filler metal” [].There is a variety of welding processes that are used in different working ://

    2 days ago  Using these parameters, a mathematical hazard analysis can be done to estimate the general region around the surgical site where hazardous exposures may be possible. Although, the following analysis is based upon one specific unit, it is representative of Nd:YAG surgical ://   For DC welding, Thoriated, Ceriated, or Lanthanated tungsten electrodes are usually used. For the latter, the end is typically ground to a specific included angle, often with a truncated end. Various electrode tip geometries affect the weld bead shape and ://

      Welding processes require heat and sometimes other substances to produce the weld. Byproducts resulting from the welding process include fumes and gases which can be serious health hazards to employees. Additionally, safety hazards can exist such as the potential for fire or explosion and injuries from arc radiation, Stridsklev I.C., Schaller K.H. and Langard S.: Monitoring of chromium and nickel in biological fluids of stainless steel welders using the flux-cored-wire (FCW) welding method, International Archives of Occupational and Environmental Health, , vol. 77, no. 8, pp. –


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Evaluation of the possible radiation hazard in using thoriated welding electrodes by R. N. Lichtenstein Download PDF EPUB FB2

Abstract. The collective radiation dose commitment to the general U.S. population estimated for the annual distribution, use, and disposal of one million thoriated welding electrodes was found to range between x 10/sup 2/ to x 10/sup 3/ man-rem to the bone (56 to x An evaluation was performed to determine whether thorium was present in concentrations above the derived air concentration during grinding and welding operations using thoriated tungsten ://   electrodes as the electrodes may emit alpha, beta and gamma radiation.

Additional measures should be taken to protect from such possible alpha, beta and gamma radiation. Thoriated tungsten electrodes may be incompatible with some strong acids. Warning. ‐ Avoid breathing welding fumes and gases, they may be dangerous to your :// Welding arcs emit strong ultraviolet (UV) radiation, which could pose serious health risks for skin and eyes.

According to Directive /25/EC, UV hazard evaluation has to be performed in the working environment. The measurement of welding arc ignition radiation is a difficult task.

This article describes the effort made to determine actinic radiant exposure levels during welding arc ignition I answered part of my question about the electrodes. I got a hold of two packages of 5/32 red tipped 2% thorium electrodes last night. It had 7/8/ stamped on the package. I looked over the package real good and no where did it mention anything about radiation, wearing a mask, using a vacuum system, ://   concerned about the possible health hazards due to the exposure of welders to fumes, gases, radiation, and noise from various welding processes.

Although much has already been learned about welding processes and technology, the effects of welding on human health have not been fully understood.

To help the studying and understanding of   two types of radiation associated with welding operations; ionizing and non-ionizing. Ionizing radiation is produced by the electron beam welding process and during the grinding (pointing) of thoriated tungsten electrodes for Gas Tungsten Arc Welding (GTAW) :// /pdf/occsafety/hot_work/ Thoriated tungsten electrodes are most commonly associated with TIG welding operations.

As indicated on the AWS Safety & Health Fact Sheet #27, Thoriated Tungsten Electrodes, “Thoriated tungsten electrodes contain thorium, a radioactive material that can pose health and environmental risks at elevated exposure ://   INTRODUCTION. Worldwide, ~2 million employees work full-time in welding processes, in addition to numerous other workers who perform welding tasks as part of their occupation (Cena et al., ).Workers that participate in welding tasks are exposed to a complex and heterogeneous mixture of welding fumes that consist of metals, metal oxides, gases, and vapours (Lehnert et al., ).

These particles were a continual radiation hazard to the few local cells near it. Carson concedes that he has never calculated an individual's radiation exposure from exposure to thoriated tungsten welding electrodes, nor does Dr. Carson have any specialties or medical certifications in any radiation related disciplines or medical ://   An evaluation was performed to determine whether thorium was present in concentrations above the derived air concentration during grinding and welding operations using thoriated tungsten electrodes.

A few of the advantages of using thoriated tungsten electrodes in industry include easier arc starting, greater stability, and reduced weld metal The tungsten electrodes used in inert gas shielded arc welding usually contain per cent.

of thorium oxide for ease of operation and economy in welding. This investigation was made to determine the resulting level of alpha activity in the worker's breathing zone, and also at various points in the vicinity of the arc during welding ://   For everyone involved in any phase of welding steel structuresengineers, detailers, fabricators, erectors, inspectors, etc.

- the new D spells out the requirements for design, procedures, qualifications, fabrication, inspection and repair of steel structures made of tubes, plate and structural shapes that are subject to either static or cyclic :// Isabel’s higher education was at Cambridge and Sheffield universities.

She joined TWI in after working in nuclear engineering, steels research and offshore technology, and has been a Technology Fellow since Personnel using electrical welding and cutting equipment must be trained on safe work practices and procedures before use of this equipment.

Some measures to prevent electrical shock include: Never use a bare hand or wet glove to change electrodes. Do not touch an energized electrode while you are in contact with the work :// 2 days ago  Be Prepared: Five Potential Welding Safety Hazards to Avoid by John Petkovsek, Director, Environment, Health and Safety, The Lincoln Electric Company Safety is a critical consideration for any welding project.

Arc welding is a safe occupation when proper precautions are :// /Pages/   Hoods must be located as close as possible to the welding points so that the welding fumes and gases are captured at the source.

An air velocity of m/s ( ft/min) across the welding site is recommended. In all processes that use shielding gases, air velocities in Welding is a broad term for the process of joining metals through coalescence (AWS, ).

Welding techniques tend to be broadly classified as arc welding or gas welding. Arc welding uses electricity to generate an arc, whereas gas or oxyfuel welding (ISO process numbers 3, 31, and ) uses fuel gases such as acetylene or hydrogen to generate :// Obviously, their life is extended and cost of replacement avoided in the simplest possible way i.e.

by simply ignoring their damaged condition. Hence; the greater risk to personnel. 2)Fumes & Dust: Fumes & dust are another health hazard. A Danish study has shown that the lungs of welders, who have done heavy duty welding for many years without Raymond Burleson, Plaintiff-appellant, v.

Texas Department of Criminal Justice; et al., Defendants,nolan Glass, Plant Manager, Stainless Steel Plant, Boyd Unit, Texas Department of Criminal Justice — Id; Billy West; Joe White, Defendants-appellees, F.3d (5th Cir.

) case opinion from the US Court of Appeals for the Fifth Circuit. Full text of "SANS Welding and thermal cutting processes - Health and safety" See other formats Republic of South Africa J^ EDICT OF GOVERNMENT -^^ In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the   For decades, Thoriated Electrodes have been the most common electrodes selected by the weld industry for DCEN TIG m is a radioactive alloy used in the manufacture of tungsten arc welding electrodes.

This alloy assists in arc starting, (not necessary as other alloys can be used).Investigation of a Possible Health Hazard From Asbestos Fibers Used in Welding Electrodes. Advanced Techniques for InSitu Monitoring of Phase Transformations During Welding Using SynchrotronBased XRay Diffraction.