RADIOMETRICS SURVEY Susanne Scholz, Application Engineer - Vexcel Imaging David Armah, Director - Business Development - A-M Surveys Ltd Howard Barrie, President - Terraquest Ramesh Acharya Gundi, Chief Geophysicist - Mcphar international radiometric survey and it is therefore important that a careful control of the background radiation is maintained during the survey operation. For example, the survey area can be surveyed in stages to ensure that there is no deterioration in the natural background before the next stage. “During the radiometric calibration, a series of images is captured, including color targets, white fields, and dark frames. The use of calibrated shutters ensures a consistent amount of light enters the camera system. The illumination of the calibration environment is crucial and requires a stable light source that closely approximates the spectrum of the sun. By employing a calibrated spectrometer, the light source can be carefully monitored throughout the calibration process,” enlightens Susanne. “The most important aspect of radiometric surveys in my candid opinion is, ACCURACY,” asserts David Armah, Director of Business Development and Admin at A - M Surveys Ltd. “The measuring and analysing the levels of radiation in a given area to identify and characterize radioactive materials or sources. These Accurate measurements are crucial for various reasons: Safety: In the survey conducted to assess potential radiation, hazards to; and the safety of individuals and the environment must be ensured. Accurate measurements help identify areas with elevated radiation levels, allowing for appropriate safety measures and precautions to be implemented. For Environmental Monitoring: Radiometric surveys play a vital role in monitoring environmental radioactivity, such as in nuclear power plants, waste management facilities, or areas affected by nuclear accidents. Accurate measurements are necessary to track any changes in radiation levels over time and detect any potential environmental contamination. Resource Exploration: Particularly in the mining industry, to identify and assess deposits of radioactive minerals such as uranium or thorium. Accurate measurements are crucial for determining the extent, grade, and economic viability of these deposits. Radiometric surveys contribute to Scientific Research; in various fields, including geology, archaeology, and environmental studies. Accurate measurements provide reliable data for studying geological formations, dating artefacts using radioactive isotopes, and understanding natural radiation background levels,” highlights David. David emphasizes that,to ensure the accuracy in radiometric surveys as stated above, several factors should be considered, including 1. calibration of instruments 2. Appropriate sampling techniques, 3. proper shielding from external radiation sources, 4. Quality assurance and Quality control procedures, 5. Expertise of trained professionals who can accurately interpret and analyse the collected data. Image: courtesy 22 <strong>May</strong>-<strong>June</strong> <strong>issue</strong> l <strong>2023</strong> www.africasurveyorsonline.com
OFFSHORE www.africasurveyorsonline.com <strong>May</strong>-<strong>June</strong> <strong>issue</strong> l <strong>2023</strong> 23