[en] Short communication

[en] This paper discusses the results obtained with a radon monitor based on a damage track detector suitable for short-term exposure measurements. (author). 7 refs, 4 figs

[en] Through the analysis of Radon concentration distribution in five geothermal energy fields in Mexico, it has been observed that high Radon emanation occurs near the active faults. Crosschecking data of Radon distribution, Geochemical and Geophysical information allow us to locate areas for flow testing in deep drill wells and so to evaluate the potentiality of geothermal energy reservoirs for electricity production. (author). 7 refs, 3 figs

[en] In this paper, some results of the indoor radon concentration measurements are presented. Kodac track detectors LR 115, bare and in a cup were used for these measurements. Average winter/summer ratio was determined for the town of interest. (author). 5 refs, 1 fig., 1 tab

[en] The spark counting method which is the most successful technique for automatic track counting is discussed in detail. The different types of the spark counter and the parameters affecting track counting, including the use of a resistive electrode are also discussed. The spark replica counter is conveniently used for scanning alpha tracks in strippable LR-115 detectors for radon dosimetry. (author). 14 refs, 2 figs

[en] In Egypt, several radiation monitoring programmes are currently in progress. These programmes belong to Nuclear Material Corporation, Nuclear Power Plant Authority and the Atomic Energy Authority of Egypt. Active and passive radon detectors as well as other detectors are used for environmental radioactivity and radioprotection studies. The aim of the present work is to outline these programmes. (author). 3 refs

[en] A brief review is reported of the main methods for the measurement of radon and radon daughter concentrations in air by means of active grab sampling instruments. (author). 21 refs, 1 fig

[en] Passive radon monitoring devices based on damage track detectors are very attractive for the assessment of long-term radon exposures. These devices can be divided in two broad categories, formed respectively by diffusion and permeation samplers. A permeation-type device based on a heat-sealed polyethylene bag is used in Italy. For short-term (one week or less) radon measurements, damage track detectors are not considered to be sufficiently sensitive. This paper illustrates how simple it is to measure short-term radon exposures in dwellings by spark counting large detector-areas of cellulose nitrate foils. (author). Refs

[en] Radon escaping from soil into homes appears to present the single greatest source of radiation exposure that most people will ever face. The use of solid state nuclear tracks detectors (SSNTD) is one of the most convenient techniques to assess the average radiation levels of alpha activities in the environment. By using CR-39 and LR-115 detectors long term alpha activities have been investigated to be noticeable the concentrations of natural radionuclides and Rn-222 exhalation rate under different environmental conditions in Adana. The radon distributions have been measured in soils an in single houses and apartment buildings in various floors in the summer and winter time. The seasonal variation of the radon concentration measured by CR-39 and LR-115 displayed a correlation. (author). 25 refs, 2 tabs

[en] Radon concentration measurements have been carried out in various regions in cooperation with other institutions. we expect to collect data of geophysical significance in the field of volcanic eruptions and earthquake predictions. We present the cooperation organisation and some relevant data already obtained. (author). 6 refs, 6 figs