Nondestructive and Quantitative Method for Measuring Radioactivity from Crud, Liquids and Gases in a Contaminated Pipe

• Published in: Journal of nuclear science and technology Vol. 29; no. 9; pp. 831 - 841
• Main Authors: KATAGIRI, Masaki, ITO, Hirokuni, WAKAYAMA, Naoaki
• Format: Journal Article
• Language: English
• Published: Tokyo Taylor & Francis Group 01.09.1992; Atomic Energy Society of Japan; Taylor & Francis Ltd
• Subjects: Applied sciences; contaminated pipes; cruds; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fission nuclear power plants; gamma-ray; gases; Ge detectors; Installations for energy generation and conversion: thermal and electrical energy; liquid; nondestructive testing; plateout; primary coolant system; quantitative method; radioactivity; state separation; Radioactive pollution; Gamma radiation; Decommissioning; Piping; Nuclear power plant; Cobalt Isotopes; Non destructive control; Measurement error; Radioactivity
• ISSN: 0022-3131; 1881-1248
• DOI: 10.1080/18811248.1992.9731602

A nondestructive measuring method was developed to quantify separately radioisotope concentrations of crud, liquids and gases in a contaminated pipe. Based on this method, a state-separation analysis code was also developed. An experimental system was constructed and a performance test was conducted using a mock-up contaminated pipe. The measurement accuracy of this method is 10-14%, which was determined by comparison with solid and liquid radioisotope concentrations in a mock-up contaminated pipe that had been previously quantified in advance. Furthermore, by evaluating the measurement error and the state-separation performance, it is concluded that this measuring method is applied to measure separately the crud, liquid and gaseous radioactivity in various pipes in a nuclear power plant.