Workplace indoor radon survey in Nova Scotia, Canada

2013 ◽  
Vol 56 (01) ◽  
pp. 13-18
Author(s):  
H. E. Mersereau ◽  
A. Scott ◽  
K. Whelan
Keyword(s):  
Mechanical Ventilation ◽  
Nova Scotia ◽  
Indoor Radon ◽  
Radioactive Decay ◽  
Participation Rate ◽  
Sampling Period ◽  
Radioactive Materials ◽  
Naturally Occurring ◽  
Health Canada ◽  
Radon Survey

Radon is a naturally occurring gas emitted from the radioactive decay of uranium. A systematic radon assessment carried out in Nova Scotia (NS) has shown that many areas in the province are radon prone due to elevated levels of natural radioactivity in soil. Very little occupational radon data is available for NS, so this survey was designed to collect basic radon information from several NS workplaces in a nonrandomized fashion. Twenty three workplaces were contacted for participation in the study, and 21 participated for a 91% participation rate. The survey was conducted by placing 170 alpha track detectors within 21 workplaces for a minimum three-month sampling period and comparing the results with the Canadian Guidelines for the Management of Naturally Occurring Radioactive Materials (NORM) and the Health Canada Guidelines. The results indicated that 19 of the workplaces had average radon concentrations below 150 Bqm−3, with only two workplaces having at least one measurement above this concentration. Both workplaces with elevated measurements had fewer than 25 employees and a lack of mechanical ventilation. The range of results for all workplaces was from −2.0 to 202.1 Bqm−3, with an overall average of 25.7 Bqm−3 for all workplaces. Future surveys should focus on small workplaces (<25 employees) with a lack of mechanical ventilation.

Numerical investigation of radon dispersion and dose assessment for typical ventilation schemes with an air purifier

2020 ◽  
Vol 30 (1) ◽  
pp. 114-128
Author(s):  
Dong Xie ◽  
Chenhua Wang ◽  
Chuck W Yu ◽  
Hanqing Wang
Keyword(s):  
Mechanical Ventilation ◽  
Effective Dose ◽  
Natural Ventilation ◽  
Indoor Radon ◽  
Radioactive Decay ◽  
Dose Assessment ◽  
Radiological Protection ◽  
Ventilation Condition ◽  
Air Supply ◽  
Air Purifier

Radon is a radioactive pollutant that could pose hazards to the surrounding environment and people due to its radioactive decay progenies. In this study, numerical simulations of radon dispersion were conducted under natural and mechanical ventilation with an air-purifier for radon. Factors such as the air supply speed, position and air supply angles of the purifier were considered. Results showed that the increase in the air supply speed from the purifier was an effective solution to reduce indoor radon pollution. The effect was better when the purifier was in the middle of the room. The purification effect was similar when the air supply changed under natural ventilation, while purification function was more effective when the air supply angle was 60° under the mechanical ventilation condition. An effective dose estimation involving typical ventilation schemes with radon purifier was evaluated. Using this approach, the radiation effect on occupants was computed. The calculated effective dose was 0.9 mSv y−1 when the air supply speed of the purifier was 0.2 m s−1 under natural ventilation. As a result, the effective dose calculated was under the annual effective dose limit of 3–10 mSv y−1 recommended by the International Commission on Radiological Protection (ICRP) for public exposure.

Radon Testing Status in Schools by Radon Zone and School Location and Demographic Characteristics: United States, 2014

2018 ◽  
Vol 35 (6) ◽  
pp. 442-448 ◽  
Author(s):  
Sherry Everett Jones ◽  
Stephanie Foster ◽  
Andrew S. Berens
Keyword(s):  
United States ◽  
Indoor Radon ◽  
The United States ◽  
Demographic Characteristics ◽  
Short Term ◽  
Naturally Occurring ◽  
Nationally Representative ◽  
Using Data ◽  
Radon Testing ◽  
Radon Survey

Radon is a naturally occurring, radioactive, colorless, odorless gas, and the second leading cause of lung cancer. The 1990–1991 National School Radon Survey estimated that more than 70,000 schoolrooms nationwide had “high short-term radon levels.” Using data from a nationally representative survey of schools in the United States ( N = 568; response rate = 69%), we examined the location and demographic characteristics of U.S. schools that had ever been tested for radon and whether having been tested varied by radon zone, which predicts average indoor radon levels in U.S. counties. Overall, 46.0% (95% confidence interval [39.8%, 52.4%]) of schools reported that they had ever been tested for radon. Testing significantly varied by region, percentage of minority students, and radon zone. These findings highlight the need for improved awareness of radon testing in schools, as testing is the only way to identify when remediation is needed.

ESTIMATION OF CONCENTRATION OF RADON, THORON AND THEIR DAUGHTER PRODUCTS IN RESIDENTIAL HOUSES OF SHAHJAHANPUR AND HARDOI

2015 ◽  
Vol 3 (4) ◽  
pp. 346-349
Author(s):  
Sachin Kumar
Keyword(s):  
Oil And Gas ◽  
Lung Cancer Risk ◽  
Indoor Radon ◽  
Radioactive Decay ◽  
Decay Product ◽  
Soil Environment ◽  
Product Concentration ◽  
Naturally Occurring ◽  
Decay Series ◽  
Thoron Progeny

Uranium is a naturally occurring radioactive element present in trace amount throughout the earth's crust. Radon is a progeny of uranium decay series formed from the radioactive decay of radium in the ground water, soil, environment, oil and gas deposits. The lung cancer risk depends on the above recommendation level concentration of radon, thoron and their decay product in the air.The measurement of indoor radon and thoron decay product concentration in houses of Shahjahanpur and Hardoi have been carried out using deposition based direct radon progeny sensors (DRPS) and direct thoron progeny sensors (DTPS) technique. The concentration of radon and thoron is observed to be higher in mud houses as compared to the cemented houses.

Naturally occurring radioactive materials (NORM) in ashes from a fuel-oil power plant in Cienfuegos, Cuba, and the associated radiation hazards

2013 ◽  
Vol 158 (4) ◽  
pp. 421-426 ◽  
Author(s):  
C. M. Alonso-Hernandez ◽  
J. Bernal-Castillo ◽  
Y. Morera-Gomez ◽  
A. Guillen-Arruebarrena ◽  
H. A. Cartas-Aguila ◽  
...  
Keyword(s):  
Power Plant ◽  
Fuel Oil ◽  
Radiation Hazards ◽  
Radioactive Materials ◽  
Naturally Occurring ◽  
Naturally Occurring Radioactive Materials

scholarly journals Impact assessment of enhanced exposure from Naturally Occurring Radioactive Materials (NORM) within LCA

2018 ◽  
Vol 172 ◽  
pp. 2824-2839 ◽  
Author(s):  
Andrei Goronovski ◽  
P. James Joyce ◽  
Anna Björklund ◽  
Göran Finnveden ◽  
Alan H. Tkaczyk
Keyword(s):  
Impact Assessment ◽  
Radioactive Materials ◽  
Naturally Occurring ◽  
Naturally Occurring Radioactive Materials

Determination of naturally occurring radioactive materials (NORM) in formation water during oil exploration

2009 ◽  
Vol 283 (1) ◽  
pp. 3-7 ◽  
Author(s):  
F. Moatar ◽  
S. R. Shadizadeh ◽  
A. R. Karbassi ◽  
E. Ardalani ◽  
R. Akbari Derakhshi ◽  
...  
Keyword(s):  
Oil Exploration ◽  
Formation Water ◽  
Radioactive Materials ◽  
Naturally Occurring ◽  
Naturally Occurring Radioactive Materials

scholarly journals Naturally occurring radioactive materials and related hazard indices in Ahdeb oil field

2019 ◽  
Vol 13 (27) ◽  
pp. 164-173
Author(s):  
Zainab Mohammed Hassan
Keyword(s):  
Crude Oil ◽  
Activity Concentration ◽  
International Comparisons ◽  
Oil Field ◽  
Oil Fields ◽  
Hazard Indices ◽  
Radioactive Materials ◽  
Naturally Occurring ◽  
Naturally Occurring Radioactive Materials ◽  
Crude Oil Sludge

In this work, measurements of activity concentration of naturally occurring radioactive materials (NORM) isotopes and their related hazard indices for several materials such as crude oil, sludge and water in Ahdeb oil fields in Waste governorate using high pure germanium coaxial detection technique. The average values for crude oil samples were174.72Bq/l, 43.46Bq/l, 355.07Bq/l, 264.21Bq/l, 122.52nGy/h, 0.7138, 1.1861, 0.601 mSv/y, 0.1503mSv/y and 1.8361 for Ra-226, Ac-228, K-40, Ra eq, D, H-external and H-internal respectively. According to the results; the ratio between 238U to 232Th was 4, which represents the natural ratio in the crust earth; therefore, one can be strongly suggested that the geo-stricture of the Ahdeb oil fields dose not contents any kind of rocks. Although the results indicate the rising in the activity concentration of NORM isotopes, the national and international comparisons proved that it is still in the world range limits.

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