Author: D. G. MillerPublisher:
ISBN:
Category : Alpha rays
Languages : en
Pages : 78
Book Description
Evaluation of Alpha Counting Instruments
Author: D. G. MillerPublisher:
ISBN:
Category : Alpha rays
Languages : en
Pages : 78
Book Description
Evaluation of the Single-Operation Alpha Counter
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The single-operation alpha counter, designed primarily for counting low-level alpha samples prepared by plating activity onto metal cylinders, was evaluated as a possible replacement for the parallel-plate counters now used to count activity plated on disks. Each cylinder is closed at one end, so that all activity plated on it is on an outside surface which faces the sensitive volume of the chamber, and the total activity of the plate can be determined by a single count. Each side of the disk must be counted separately in the parallel-plate counter, and the edge may be counted twice. Results from about 300 cylinders and 300 disks ranging in activity from 0 to 80 counts per minute were compared. The single-operation counter was found to be capable of giving results at least as good as those obtained with the parallel-plate counter and in half the counting time. The following changes were suggested in the final model of the instrument: (1) redesign of the chamber for more effective decontamination, (2) design of a tool to be used for inserting and removing cylinders, (3) addition of a pressure gauge to the chamber, and (4) an improvement in the method of sealing the chamber to speed operaton and insure a better seal.
State of the Art of D & D Instrumentation Technology
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 22
Book Description
Discrimination of alpha activity in the presence of a high radiation background has been identified as an area of concern to be studied for D & D applications. Upon evaluating the range of alpha detection needs for D & D operations, we have expanded this study to address the operational concern of greatly expediting alpha counting of rough surfaces and rubble. Note that the term, ''rough surfaces'' includes a wide range of practical cases, including contaminated equipment and work surfaces. We have developed provisional applications requirements for instrumentation of this type; and we also have generated the scope of a program of instrument evaluation and testing, with emphasis on practical implementation. In order to obtain the full operational benefit of alpha discrimination in the presence of strong beta-gamma radiation background, the detection system must be capable of some form of remote or semi-remote operation in order to reduce operator exposure. We have identified a highly promising technique, the long-range alpha detector (LRAD), for alpha discrimination in the presence of high radiation background. This technique operates upon the principle of transporting alphaionized air to an ionization detector. A transport time within a few seconds is adequate. Neither the provisional requirements nor the evaluation and testing scope were expressly tailored to force the selection of a LRAD technology, and they could be used as a basis for studies of other promising technologies. However, a technology that remotely detects alpha-ionized air (e. g., LRAD) is a natural fit to the key requirements of rejection of high background at the survey location and operator protection. Also, LRAD appears to be valuable for D & D applications as a means of greatly expediting surface alpha-activity surveys that otherwise would require performing time-consuming scans over surfaces of interest with alpha detector probes, and even more labor-intensive surface wipe surveys.
Counting Technique Studies II
Author: Mary Lou CurtisPublisher:
ISBN:
Category : Calorimetry
Languages : en
Pages : 46
Book Description
New Evaluation of Low Geometry Alpha Counting
Author: Robert F. OvermanPublisher:
ISBN:
Category : Alpha rays
Languages : en
Pages : 16
Book Description
Instruments for Detecting Alpha Radiation
Author: Thomas C. RozzellPublisher:
ISBN:
Category : Radiation
Languages : en
Pages : 102
Book Description
Nuclear Science Abstracts
Author: Test Methods for Evaluating Solid Waste: pts. A. B. C. Laboratory manual
Author: Nucleonics
Author: Nuclear Science
Author: U.S. Atomic Energy CommissionPublisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 122
Book Description
A total of 1517 references are listed in this compilation. These include selected non-published United States Atomic Energy Commission reports and published articles in technical books and journals. An author and a report number index with availability information are also included.