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Indoor radon survey in a university campus of Nigeria.

Obed RI, Lateef HT, Ademola AK - J Med Phys (2010)

Bottom Line: CR-39 tracketch detectors were used for the measurement of (222)Rn concentration in 24 offices in Nigeria's oldest university campus in order to estimate the effective dose to the occupants from (222)Rn and its progeny.The effective dose to the workers was estimated and this varied from 0.99 to 3.12 mSv/ y, with a mean of 1.85 mSv/y.The radon concentrations were found to be within the reference levels of ICRP.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, University of Ibadan, Nigeria.

ABSTRACT
CR-39 tracketch detectors were used for the measurement of (222)Rn concentration in 24 offices in Nigeria's oldest university campus in order to estimate the effective dose to the occupants from (222)Rn and its progeny. The dosimetric measurements were made over a period of 3 months. Questionnaires were distributed and analyzed. The radon concentration ranged from 157 to 495 Bq/m(3), with an arithmetic mean and standard deviation of 293.3 and 79.6 Bq/ m(3), respectively. The effective dose to the workers was estimated and this varied from 0.99 to 3.12 mSv/ y, with a mean of 1.85 mSv/y. The radon concentrations were found to be within the reference levels of ICRP.

No MeSH data available.


Variation of radon concentration in the offices
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Figure 0002: Variation of radon concentration in the offices

Mentions: The track densities found on the analyzed NTDs were converted into radon concentrations (Bq/ m3) using the calibration factor of 1610 Bq/ m3(tracks/mm2)/day for the utilized radon dosimeter. The results for 24 sites were obtained. The variation of radon concentration in the 24 offices surveyed is shown in Figure 2. The geometric mean was 283.6 Bq/m3. The arithmetic mean, standard deviation, and range of 222Rn concentration in the offices were 293.3, 79.6, and 157–495 Bq/m3, respectively [Table 1]. The values are below the upper value of the ICRP reference levels of 1500 Bq/m3.[2]


Indoor radon survey in a university campus of Nigeria.

Obed RI, Lateef HT, Ademola AK - J Med Phys (2010)

Variation of radon concentration in the offices
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2990120&req=5

Figure 0002: Variation of radon concentration in the offices
Mentions: The track densities found on the analyzed NTDs were converted into radon concentrations (Bq/ m3) using the calibration factor of 1610 Bq/ m3(tracks/mm2)/day for the utilized radon dosimeter. The results for 24 sites were obtained. The variation of radon concentration in the 24 offices surveyed is shown in Figure 2. The geometric mean was 283.6 Bq/m3. The arithmetic mean, standard deviation, and range of 222Rn concentration in the offices were 293.3, 79.6, and 157–495 Bq/m3, respectively [Table 1]. The values are below the upper value of the ICRP reference levels of 1500 Bq/m3.[2]

Bottom Line: CR-39 tracketch detectors were used for the measurement of (222)Rn concentration in 24 offices in Nigeria's oldest university campus in order to estimate the effective dose to the occupants from (222)Rn and its progeny.The effective dose to the workers was estimated and this varied from 0.99 to 3.12 mSv/ y, with a mean of 1.85 mSv/y.The radon concentrations were found to be within the reference levels of ICRP.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, University of Ibadan, Nigeria.

ABSTRACT
CR-39 tracketch detectors were used for the measurement of (222)Rn concentration in 24 offices in Nigeria's oldest university campus in order to estimate the effective dose to the occupants from (222)Rn and its progeny. The dosimetric measurements were made over a period of 3 months. Questionnaires were distributed and analyzed. The radon concentration ranged from 157 to 495 Bq/m(3), with an arithmetic mean and standard deviation of 293.3 and 79.6 Bq/ m(3), respectively. The effective dose to the workers was estimated and this varied from 0.99 to 3.12 mSv/ y, with a mean of 1.85 mSv/y. The radon concentrations were found to be within the reference levels of ICRP.

No MeSH data available.