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Estimation of external gamma radiation dose in the area of Bory Stobrawskie forests (PL).

Dołhańczuk-Śródka A - Environ Monit Assess (2011)

Bottom Line: The study assessed the radiological risks associated with the presence of natural and artificial radionuclides in the Bory Stobrawskie forests (PL).Using the conversion factors given by UNSCEAR and the measurements results of (232)Th series, (238)U series, (40)K, and (137)Cs specific activities in the 10-cm soil layer the values of absorbed dose (D) and the annual effective dose equivalent derived from terrestrial gamma radiation (E) were calculated.The calculated dose was compared with doses directly measured on the area studied.

View Article: PubMed Central - PubMed

Affiliation: Biotechnology and Molecular Biology, Opole University, ul. kard. B. Kominka 4, 45-032 Opole, Poland. agna@uni.opole.pl

ABSTRACT
The study assessed the radiological risks associated with the presence of natural and artificial radionuclides in the Bory Stobrawskie forests (PL). Using the conversion factors given by UNSCEAR and the measurements results of (232)Th series, (238)U series, (40)K, and (137)Cs specific activities in the 10-cm soil layer the values of absorbed dose (D) and the annual effective dose equivalent derived from terrestrial gamma radiation (E) were calculated. The calculated dose was compared with doses directly measured on the area studied.

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Relationship between measured and the calculated gamma dose rates
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Fig4: Relationship between measured and the calculated gamma dose rates

Mentions: Rather poor relationship between EI and H was found. The correlation coefficient value was 0.46, supposing existence of other important sources of gamma radiation in environment that were not included in the formula used in calculations. Further statistical analysis revealed a relationship between EII and H. In the range of the measured H doses, a good linear relationship with calculated EII can be concluded (Fig. 4). The slope of the relationship was 8.3 (with standard error 1.2), the intercept was 0.00 (with standard error 0.03), and the value of correlation coefficient was 0.86. The intercept value did not differ significantly from 0, and the relationship can be simplified to proportion. It can by concluded that the values of the measured dose rate H is about eight times bigger than the calculated EII and contribution of 137Cs has to be taken into consideration while estimation of gamma radiation dose rate.Fig. 4


Estimation of external gamma radiation dose in the area of Bory Stobrawskie forests (PL).

Dołhańczuk-Śródka A - Environ Monit Assess (2011)

Relationship between measured and the calculated gamma dose rates
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3412953&req=5

Fig4: Relationship between measured and the calculated gamma dose rates
Mentions: Rather poor relationship between EI and H was found. The correlation coefficient value was 0.46, supposing existence of other important sources of gamma radiation in environment that were not included in the formula used in calculations. Further statistical analysis revealed a relationship between EII and H. In the range of the measured H doses, a good linear relationship with calculated EII can be concluded (Fig. 4). The slope of the relationship was 8.3 (with standard error 1.2), the intercept was 0.00 (with standard error 0.03), and the value of correlation coefficient was 0.86. The intercept value did not differ significantly from 0, and the relationship can be simplified to proportion. It can by concluded that the values of the measured dose rate H is about eight times bigger than the calculated EII and contribution of 137Cs has to be taken into consideration while estimation of gamma radiation dose rate.Fig. 4

Bottom Line: The study assessed the radiological risks associated with the presence of natural and artificial radionuclides in the Bory Stobrawskie forests (PL).Using the conversion factors given by UNSCEAR and the measurements results of (232)Th series, (238)U series, (40)K, and (137)Cs specific activities in the 10-cm soil layer the values of absorbed dose (D) and the annual effective dose equivalent derived from terrestrial gamma radiation (E) were calculated.The calculated dose was compared with doses directly measured on the area studied.

View Article: PubMed Central - PubMed

Affiliation: Biotechnology and Molecular Biology, Opole University, ul. kard. B. Kominka 4, 45-032 Opole, Poland. agna@uni.opole.pl

ABSTRACT
The study assessed the radiological risks associated with the presence of natural and artificial radionuclides in the Bory Stobrawskie forests (PL). Using the conversion factors given by UNSCEAR and the measurements results of (232)Th series, (238)U series, (40)K, and (137)Cs specific activities in the 10-cm soil layer the values of absorbed dose (D) and the annual effective dose equivalent derived from terrestrial gamma radiation (E) were calculated. The calculated dose was compared with doses directly measured on the area studied.

Show MeSH