|Statement||assembled by Valorie A. Wood.|
|LC Classifications||RM859 .A1U5 no. 68-1|
|The Physical Object|
|Pagination||vi, 115 p.|
|Number of Pages||115|
|LC Control Number||71603171|
For the leak-testing of radium sources, several methods have been reported in the literature. From among such methods the electro L. Medveczky and L. Bozoky static method (Gallaghar, ) the absorption of radon on charcoal (Hale, ), on cotton plug (Rose, ) or in a glass container (Benson, ), are worth : L. Medveczky, L. Bozóky. In the case of wipe tests the particles of radium A, B, and C are counted and this has to be done immediately after making a wipe because of the brief effective half life of approximately 30 minutes. 1 In this technique the gamma rays of radium B and C 2 are counted, and whereas the radon daughters are in equilibrium with the parent, the Author: Samuel E. Crowder. for leak testing radium sources. Many ofthecurrent techniques generally require that the source be placed inaleak tight chamber forperiods upto24 hours, after which time the chamber isexamined for radium and daughter products resulting from the leak. Examples of such tests include the Hale3 method in which the leaking source isplaced. containing Radium (a) Collection of wipe test samples. VCb) Furnishing leak test kits Model TGA, and any approved commercial leak test kit which may be used for this function, to persons authorized to use such kits for wipe testing of sealed sources. Wc) Analysis of wipe test samples collected by the licensee as stated in (a).
Product information is based on a variety of sources, including magazine articles, books, internet searches, and expert knowledge. Information readily available at the Radium Historical Items Catalog viii DCN TR Radium is a naturally occurring silvery-white radioactive metal that can exist in several forms called isotopes. Radium is formed when uranium and thorium break down in the envi ronment. Uranium and thorium are found in small amounts in most rocks and soil. Two of the main radium isotopes found in the environment are radium and radium As a “radium hound,” Hartman had firsthand experiences of dealing with and careful handling of radium in the early 20 th century. Other resources include photographs, a scrapbook on Marie Curie, medical trade ephemera, and numerous books dealing with radium treatments and the development of radium . All roofs eventually leak—it is just a matter of when and where. Nevertheless, the hope is that new roofing systems do not leak right from the start. It is critical to verify the watertightness of roofing, especially if it is to be covered with ballast or a vegetated roof assembly.
Another example of low-voltage electrical conductance testing. Photo courtesy Luna and Associates. A similar system to this proprietary methodology uses a small scanning platform of approximately x mm (18 x 24 in.), which incorporates a perimeter wire loop of chains that hangs from the platform, making contact with water on the roof surface, as well as a separate line of chains . Leakage testing of medical radium sources. Linsley GS. The results of leakage tests on approximately clinical radium sources in current use in several hospitals are presented. The tests were carried out using a liquid scintillation immersion method. Less than 1% of the sources leaked radon gas (Rn) to an extent greater than 1 nCi/24 h. BICOM _VA mzs Printed in Germany on chlorine-free bleached paper Technical alterations reserved Preface Fundamentals of leak detection. Books about radio related technology and electronics: Modern Era Radio Tech Books Broadcast Engineering and related technical books. Drake's Cyclopedia of Radio & Electronics Many editions available. Rider Library Some of the more than books published by Rider: SAMS Library A collection of technical books from Howard Sams: TAB Books.