Review of Various Survey Instruments Locally Developed for Radiation Protection Work

This paper describes the various survey instruments developed in the Directorate of Radiation Protection for radiological protection surveys of medical and industrial institutions. These Instruments Include (a) survey meters: (i) ion-chamber and scintillation types for measuring X- and gamma-ray exposures, and (ii) proportional counter and scintillation types for measuring slow- and fast-neutron fluxes; and (b) an isotope calibrator for measuring the activity of gamma sources. Each of these Instruments was developed to meet specified operational requirements, taking into consideration various factors such as climatic conditions, availability of components and range of Intensities of radiation encountered during the survey. All the instruments discussed In this review are portable and battery powered. (author)