Field Testing and Applications of the Ultrasonic Ranging and Data (USRAD) System PDF Download
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Languages : en
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The Ultrasonic Ranging and Data (USRAD) System is a patented, computerized data acquisition system developed to relate the radiological surveyor's precise physical location to instantaneous radiation data taken during walk-on surveys. The USRAD System incorporates three technologies: radio frequency communications, ultrasonics, and microcomputers. Initial field testing of the USRAD System has resulted in several improvements to walk-on radiological surveys including real-time position data, reproducible survey results, on-site verification of survey coverage, on-site data reduction and graphics, and permanent data storage on magnetic media. Although the USRAD System was developed specifically for use with a gamma-ray detector, it is adaptable to other instruments. Applications of the USRAD System may include verification of remediated and uncontaminated areas, emergency response in mapping pollutant locations after accidents, and characterization of hazardous waste areas. 2 refs., 8 figs.
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Languages : en
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The Ultrasonic Ranging and Data (USRAD) System is a patented, computerized data acquisition system developed to relate the radiological surveyor's precise physical location to instantaneous radiation data taken during walk-on surveys. The USRAD System incorporates three technologies: radio frequency communications, ultrasonics, and microcomputers. Initial field testing of the USRAD System has resulted in several improvements to walk-on radiological surveys including real-time position data, reproducible survey results, on-site verification of survey coverage, on-site data reduction and graphics, and permanent data storage on magnetic media. Although the USRAD System was developed specifically for use with a gamma-ray detector, it is adaptable to other instruments. Applications of the USRAD System may include verification of remediated and uncontaminated areas, emergency response in mapping pollutant locations after accidents, and characterization of hazardous waste areas. 2 refs., 8 figs.
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Category : Power resources
Languages : en
Pages : 620
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Languages : en
Pages : 9
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The Ultrasonic Ranging and Data System (USRADS) is a computerized data collection system that enables the correlation between geographic location and data gathered at that location. The USRADS employs ultrasonics, radio frequency transmission, and microcomputers to gather data for site characterization. In the case of a radiological survey, radiation measurements are gathered to confirm that remedial action has successfully removed contamination to levels below applicable guidelines or standards. The Pollutant Assessments Group of Oak Ridge National Laboratory (ORNL), Grand Junction, Colorado, was directed by the Department of Energy (DOE) to verify the adequacy of remedial action taken at various sites throughout the western United States. The USRADS was utilized at the Monticello Remedial Action Program, a National Priorities List site in Monticello, Utah, following remedial action of approximately 15 cm of soil contaminated by wind-dispersed uranium mill tailings. The verification was conducted in a 15,300 square meter property that resides on the periphery of the mill site and was vacant land. Remedial action at this location was conducted to bring the site's radiation levels below those specified in 40 CFR 192. The radiological verification survey was conducted following excavation of the contaminated material. The USRADS was configured with a Victoreen gamma scintillometer and was operated by a two-man survey team. There are several advantages to verifying with the USRADS over conventional gamma radiation survey methods. First, survey coverage can be instantly verified, allowing the survey team to confirm complete survey coverage. Second, the data may be analyzed on site, enabling the team to identify areas of elevated gamma radiation exposure rates and to select biased sample locations. Finally, the USRADS provides both high quality graphical illustrations for permanent documentation and data storage that can be easily retrieved for site certification.
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Languages : en
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The Ultrasonic Ranging and Data System (USRADS) was developed to allow radiation exposure data and positional information to be collected, stored and analyzed in a more efficient manner than currently employed on the (Uranium Mill Tailings Remedial Action (UMTRA) project. USRADS is a portable unit which employs ultrasonics, radio frequency transmissions, and a personal computer. Operational experience indicates that the system results in increased information about the property with decreased data analysis and transcription effort and only slightly more field effort. 5 refs., 3 figs., 2 tabs.
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Languages : en
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An ultrasonic ranging and data telemetry system determines a surveyor's position and automatically links it with other simultaneously taken survey data. An ultrasonic and radio frequency (rf) transmitter are carried by the surveyor in a backpack. The surveyor's position is determined by calculations that use the measured transmission times of an airborne ultrasonic pulse transmitted from the backpack to two or more prepositioned ultrasonic transceivers. Once a second, rf communications are used both to synchronize the ultrasonic pulse transmission-time measurements and to transmit other simultaneously taken survey data. The rf communications are interpreted by a portable receiver and microcomputer which are brought to the property site. A video display attached to the computer provides real-time visual monitoring of the survey progress and site coverage.
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Languages : en
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The Radiological Survey Activities (RASA) program at Oak Ridge National Laboratory (ORNL) serves as the Inclusion Survey Contractor (ISC) in the Department of Energy's (DOE) Uranium Mill Tailings Remedial Action project (UMTRAP). The ISC is to identify properties in the vicinity of 24 inactive uranium mill sites suspected of having 226Ra-bearing uranium mill tailings by-product material originating from the processing of uranium ore contamination. Mobile gamma scanning was the primary method used to identify these properties. Once identified, the ISC conducts an inclusion survey. This survey performs sufficient radiological measurements to determine if uranium mill tailing contamination is present, and, if so, if it is in excess of relevant Environmental Protection Agency (EPA) criteria. Radon emanating from 226Ra is the primary pathway of exposure to human occupants at these sites. EPA criteria focus on controlling 226Ra concentration in soil. The concentration of 226Ra in soil can be measured directly by soil sampling and subsequent gamma spectrographic analysis of the sample, or by direct measurement of the gamma exposure rate at the soil surface using portable instrumentation in the field. In both methods, the concentration of 226Ra is inferred by examining the frequency of gamma emission of 214Bi, a radioactive decay product in the 238U decay chain.
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Category : Science
Languages : en
Pages : 1128
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Category : Government reports announcements & index
Languages : en
Pages : 1364
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Languages : en
Pages : 28
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Author: Polaroid Corporation
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Languages : en
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