Ivanova, Kremena and Stojanovska, Zdenka and Chobanova, Nina and Tsenova, Martina and Angelova, Antoaneta (2017) Results of the national radon indoors survey in Bulgaria. In: Third East-European Radon Symposium, 15-19 May 2017, Sofia,Bugarija. (Unpublished)
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Abstract
Purpose: To present the results
of the annual
average indoor radon
concentrations
from National
survey in Bulgarian regions. Variability
of
measured
data between
28
regions was
investigated in order to
achieve
the preliminary
assessment
the
distribution
of
indoor
radon
concentration
through
Bulgarian
territory.
Argument: The National survey on average radon concentration
in
Bulgarian
dwellings
was carried out
from
2015
to
2016,
with the
co-operation
of
the
Regional
Health Inspectorate
under
the
National
Radon
Program.
Data were collected through personal
interviews with
residents
and deployment of alpha track detectors
for
one
year
through
two
phases. The first phase was from March 2015 to December 2015
and second from December 2015 to April 2016 approximately. For each
region 100 detectors were distributed and spread to villages in regions
depending on the population. The measurements were completed in
2775 dwellings. The distribution of indoor radon levels has been found
to be log-normal with a geometric mean (GM) of 81.6 Bq•m−3 and a
standard deviation of 2.1. The highest value of the radon concentration
found was 1314 Bq•m−3 in the Sliven region. Region with high GM of 184
Bq•m−3 and a standard deviation of 1.7 is Yambol in Southeast Bulgaria.
In about 6% of the houses, the radon concentration was found to be in
excess of the recommended reference value of 300 Bq•m−3, suggested
by the Council of the European UnionCommission in in new EU Directive
2013/59/Euratom. Conclusion: The data from National survey are the first
systematic results and are received to complete the National Program,
which will finish in 2017. The preliminary results clearly show that the national
action plan
to address
long-term risks
from radon
exposures should be developed taking into account the results achieve in this program
and in accordance with the new Directive 2013/59/Euratom.
| Item Type: | Conference or Workshop Item (Speech) |
|---|---|
| Subjects: | Natural sciences > Physical sciences |
| Divisions: | Faculty of Medical Science |
| Depositing User: | Zdenka Stojanovska |
| Date Deposited: | 20 Jun 2017 14:01 |
| Last Modified: | 20 Jun 2017 14:01 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/17945 |
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