Therefore, the simultaneous measurement of radon and thoron exhalation rates is important as the data can be used to determine the validity of a measuring location. A simple passive monitor was developed for integrating measurements of indoor thoron concentrations the monitor was remodeled from a commercially available radon monitor with allyl diglycol carbonate (cr-39) detector. A twin dosimeter was used for simultaneous measurements of radon and thoron inside the houses the work presented in this paper is a part of the national radon survey. Simultaneous measurement of radon and thoron released from building materials used in japan, nuclear science and technology, 1, p404-407.
Measurements of indoor spatial distribution of thoron and radon concentrations in radon levels using ssntds defence science journal 42, the indoor air of a traditional japanese wooden house 219±225. Simultaneous measurements of radon and thoron, and their progeny levels in dwellings on anticlinal structures of assam, india debajyoti barooah & simi barman & sarat phukan. Measurement of the indoor and outdoor 220rn (thoron) equilibrium factor: application to lung dose a miniature four-chamber alpha track detector was developed that measures both 222rn (radon) and 220rn.
Experiment of simultaneous measurement of indoor, checked in the nirs radon and thoron chambers  as well as with samples of natural u and th contain. Even though limited simultaneous measurements of radon and thoron were conducted in ottawa, winnipeg and the mont-laurier region, to better assess thoron exposure in canada, more data are needed in other geographic locations. Simultaneous radon and thoron measurements were conducted in a total of 370 canadian homes in five cities/communities [7,8,9,10] the ratios between thoron and radon concentrations in individual homes varied widely with an average ratio of 067 three point eight percent (38%) of homes had thoron concentrations more than five times the radon. The method of simultaneous measurement of radon and thoron progeny in air by means of lsc technique can be described as follows for the sampling of air for radon and thoron progeny, a pump with a high flow rate is necessary (at least 30-40 l min −1 ) and filters that become transparent in toluene-based liquid scintillator (membrane or. Monitoring systems for occupational and also be used for radon/thoron monitoring in dwellings, radon exhalation measurements, radon concentration measurement.
The durridge rad7 is a truly versatile radon and thoron detector of mature and yet still state-of-the-art design its specifications match or exceed those of the most expensive radon measurement devices in the world. Simultaneous measurement of radon and thoron exhalation rate from soil and building materials c cosma1, s astilean2, v cosma3, r begy1, t dicu1, z horvath1. Read simultaneous measurement of radon, radon progeny and thoron concentrations using makrofol-de detectors, radiation measurements on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
For the purpose of directly measuring radon and thoron progeny concentrations simultaneously, an unattended battery-operated progeny measurement (ubpm) device, which samples aerosol particles in an electric field, was improved by adopting two different thickness aluminum foils for alpha particles. A method has been developed for the simultaneous measurement of radon (rn 222) and thoron (rn 220) in a mixed environment using the lucas scintillation cell (lsc) the method uses counts from two arbitrary counting intervals from zero time with respect to sampling hence, called two count method (tcm. High quality, high performance in radon products instrument manufacturing division products the pylon instrument manufacturing division of pylon electronics inc offers the following products for radon, thoron, and their progeny detection and measurement. Results of simultaneous radon and thoron measurements in 33 metropolitan areas of canada the objective of this survey was to measure radon and thoron.
Simultaneous, direct measurements of the radon and thoron contents in the air near the ground have been made, using apparatus adapted from those of norinder et al (1952) and israel (1964) data of the diurnal variations and the vertical distributions of radon and thoron are presented. Radiation monitor the wlx is a sophisticated measurement • simultaneous radon and thoron programmable measurement methods • simultaneous radon and thoron. We simultaneously measured radon and thoron exhalation rates in areas of weathered acid rocks in japan to investigate the relationship between them and between measured and calculated radon exhalation rates to calculate the radon exhalation rate, we used an equation proposed by unscear our. The method of simultaneous measurement of radon and thoron progeny in air by means of lsc technique can be described as follows: - for the sampling of air for radon and thoron progeny a pump with high.