- Type of paper
: Paper in journal
Title: 6. Radon dose in cellars during the war in Croatia
- Authors:
- Planinić, Josip (37444)
- Lokobauer, Nevenka
- Franić, Zdenko
- Bauman, Alica
Journal: J. Radioanal. Nucl. Chem.,Letters
Volume: 176
Year: 1993
Pages: from 92 to 101
Number of references: 4
Language: engleski
Summary: During the war in 1991 and 1992, because of artillery
bombardment, the citizens of Croatia have been forced to live underground
in shelters and cellars and therefore they have been exposed to an
additional radon radiation. Rn concentration in shelters (cellars) and
dwellings of Osijek and Zagreb were measured by means of a silicon detector
(Radhome) and also, at several locations, by an LR-115 nuclear track
detector. Estimated monthly radon exposures in dwellings and cellars of
Osijek or Zagreb were (2.88ń1.58)*10(4) Bq h m(-3) and (6.62ń3.17)*10(4) Bq
h m(-3), respectively, or (1.94ń0.72)*10(4) Bq h m(-3) and
(7.46ń7.78)*10(4) Bq h m(-3). Inhabitants of Osijek and Zagreb have
received, on the average, the effective dose equivalent of 4.1 and 2.6 mSv
y(-1), respectively.
- Type of paper
: Paper in journal
Title: 7. More about track etching statistics
- Authors:
- Planinić, Josip (37444)
Journal: J. Radioanal. Nucl. Chem.,Letters
Volume: 175
Year: 1993
Pages: from 95 to 101
Number of references: 4
Language: engleski
Summary: Statistical errors of the track etching method were
investigated by using the LR-115 nuclear track detector and visual
microscopic counting. In the experiment, four persons counted tracks of the
same detector and the analysis of variance was applied to the respective
means and standard deviations. Another experiment was performed with ten
detectors exposed to air in the same room; after standard etching and
counting, the relative error of the detector track density was obtained as
11.2 %. Taking into account the errors of the detector sensitivity
coefficient and background, the total relative error of the track etching
method was 19.5 % in case of measurements of the indoor radon concentration
of 8.2 Bq m(-3).
- Type of paper
: Paper in journal
Title: 8. Radon concentrations in kindergartens of Osijek and
Ljubljana
- Authors:
- Planinić, Josip (37444)
- Kobal, Ivan
- Vaupotič, Janja
Journal: J. Radioanal. Nucl. Chem.,Letters
Volume: 175
Year: 1993
Pages: from 103 to 111
Number of references: 6
Language: engleski
Summary: Indoor radon concentrations in the kindergartens of Osijek,
Croatia, have been measured with alpha scintillation cells, LR-115 nuclear
track detectors, as well as a Radhome semiconductor detector. Average
values of 50.2,43.7 and 47 Bq/m(3) were obtained, respectively. Under the
worst conditions, the annual radon effective dose equivalent was 10 mSv
y(-1). Using bare and filtered LR-115 detectors, the average equilibrium
factor was assessed as 0.36 indoors. Measurements of the gamma dose rate in
the kindergartens did not show any significant correlation with the radon
cincentration. Indoor radon concentrations in the kindergartens of
Ljubljana, Slovenija, measured by scintillation cells had an arithmetic
mean and standard deviation of 228 and 143 Bq/m(3), respectively.
- Type of paper
: Paper in journal
Title: 11. Calibration coefficient of the SSNTD and equilibrium
factor for radon
- Authors:
- Planinić, Josip (37444)
- Vuković, Branko
Journal: J. Radioanal. Nucl. Chem.,Letters
Volume: 175
Year: 1993
Pages: from 333 to 337
Number of references: 4
Language: engleski
Summary: Disintegration, ventilation and deposition were considered
as removal processes of the radon and its short-lived daughters in air and
the respective concentration equations were applied. Calibration
coefficient (K-f) of the solid state nuclear track detector (SSNTD) LR-115
for radon and the equilibrium factor (F) were related to track densities of
the bare detector (D) and the filtered one (D-0). A useful relationship
between K-f, F and detector sensitivity coefficient (k) was derived. Using
the calibrated value k=3.29*10(-3) m, the exposed detectors gave the
average values of the equilibrium factor, calibration coefficient and
indoor radon concentration of a single house living room in Osijek 0.46,
142.3 m(-1) and 37.8 Bq m(-3), respectively.
- Type of paper
: Paper in proceedings
Title: 18. Efficiency of the radon detection
- Authors:
- Planinić, Josip (37444)
Proceedings title: Zbornik radova XVI. Jugoslavenski simpozij o zaštiti od zračenja
Language: hrvatski
Place: Neum
Year: 1991
Pages: from 322 to 325
Meeting: Second International Workshop on Radon Monitoring in Radioprotection
Held: from 05/28/91 to 05/31/91
Summary: The Rn activity concentrations in air were measured by the
LR-115 nuclear track detector. Using the calibrated sensitivity coefficient
of the detector (k= 0.346 cm), the critical detection angel was calculated
(éc= 31ř). The detector efficiency for Am(241) was near 32 % for energy
region of (1 ö 3.7) MeV, but the Rn one was 23.8 %.
- Type of paper
: Paper in proceedings
Title: 19. Calibration coefficient of the SSNTD and equilibrium
factor for radon
- Authors:
- Planinić, Josip (37444)
- Vuković, Branko
Proceedings title: Proc. of the Fifth International Symposium on the Natural Radiation Environment
Language: engleski
Place: Salzburg, Austrija
Year: 1991
Pages: from 8 to 8
Meeting: Fifth International Symposium on the Natural Radiation Environment
Held: from 09/22/91 to 09/28/91
Summary: Disintegration, ventilation and deposition were considered
as removal processes of the radon and its short-lived daughters in air and
the respective concentration equations were applied. Calibration
coefficient (K-f) of the solid state nuclear track detector (SSNTD) LR-115
for radon and the equilibrium factor (F) were related to track densities of
the bare detector (D) and the filtered one (D-0). Theoretical curves
between the air exchange rate (L) and track density ratio (D/D-0) as well
as between F and L were obtained. Also, a useful relationship of the
calibration coefficient and detector sensitivity (k) was derived. The
detector sensitivity was calibrated by means of a radon chamber contained
crushed uranium ore and by scintillation cells which gave k=3.29*10(-3) m,
by standard etching conditions (10 % NaOH, 60řC, 120 minutes etching time,
visual counting of microscopic tracks). The detector efficiency was
determined experimentaly using a known Am(241) source but in the alpha
particle energy region of (0.5 ö 4) MeV. During two years, the exposed
detectors gave the average values of the equilibrium factor, calibration
coefficient and indoor radon concentration of a single house living room in
Osijek 0.46, 142.3 m(-1) and 37.8 Bq m(-3), respectively.
- Type of paper
: Paper in proceedings
Title: 20. Radon dose equivalent in dwellings and shelters during
the war in Croatia
- Authors:
- Planinić, Josip (37444)
- Lokobauer, Nevenka
- Franić, Zdenko
- Bauman, Alica
Proceedings title: Zbornik radova Prvog simpozija Hrvatskog društva za zaštitu od zračenja
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 315 to 319
Meeting: Prvi simpozij Hrvatskog društva za zaštitu od zračenja
Held: from 11/24/92 to 11/26/92
- Type of paper
: Paper in proceedings
Title: 22. Radon distribution in dwellings
- Authors:
- Planinić, Josip (37444)
- Faj, Zdravko (86606)
- Šuveljak-Šipalo, Božica (86766)
- Editors
- Franić, Zdenko
- Kubelka, Dragan
Proceedings title: Zbornik drugog simpozija hrvatskog društva za zaštitu od zračenja
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from 305 to 308
Meeting: Drugi simpozij Hrvatskog društva za zaštitu od zračenja
Held: from 11/23/94 to 11/25/94
Summary: Radon concentration measurements, performed with the
Radhome silicon detector and scintillation cells, independetly, inside a
flat of the dwelling-house with four floors (Sjenjak), showed an unusual
radon distribution within the R2 room where the east measurement positions
had radon concentrations in the air significantly higher than the ones on
the west side of the room. Similar radon distribution was registerd in the
basement just bellow the R2 room. Therefore one could conclude a main
source of the radon was in the soil where from the radon diffused through
the concrete floor into the basement then to the R2 room. An anomalous
radon distribution in the single house (Retfala), where the radon
concentration in the basement was near a factor of 4 lower than the one of
the living room on the first floor during a few days, was explained by
strong variations of the atmospheric pressure. Otherwise the average annual
radon concentrations were 165 and 100 Bq/m(3) in the basement of the single
house and living room on the first floor, respectively.
- Type of paper
: Paper in proceedings
Title: 23. Radon - source of radiation in the atmosphere
- Authors:
- Faj, Zdravko (86606)
- Planinić, Josip (37444)
- Šuveljak-Šipalo, Božica (86766)
- Vuković, Branko
Proceedings title: Drugi zbornik ekoloških radova - Problemi u zaštiti okoliša Osijeka
Language: hrvatski
Place: Osijek
Year: 1994
Pages: from 27 to 32
Summary: The in-breathing of radon and its short-living descendants
represents half of the natural radioactivity that man consumes from natural
sources. Radon is breathed in as gas within the air and it affects our
well-being. Radon is the source of ionizing radiation and can be decreased,
therefore it is necesssary to know its concentration in the air, as well as
the ways how to diminish its presence in our enviroment. The measuring of
radon concentration has been done at several places in Osijek and
Tiborjanci since 1986, and it was performed in nursery schools as well as
in the primary schools. During the war 1991/1992, the measuring was
performed in flats, basements and shelters in Osijek and in Zagreb.
- Type of paper
: Paper in proceedings
Title: 21. Through investigation of indoor radon in a
kindergarten with elevated levels
- Authors:
- Vaupotič, Janja
- Planinić, Josip (37444)
- Kobal, Ivan
- Editors
- Franić, Zdenko
- Franić, Zdenko
- Kubelka, Dragan
Proceedings title: Zbornik radova drugog simpozija Hrvatskog društa za zaštitu od zračenja
Language: engleski
Place: Zagreb
Year: 1994
ISBN/ISSN: .
Pages: from 309 to 313
Meeting: Drugi simpozij Hrvatskog društva za zaštitu od zračenja
Held: from 11/23/94 to 11/25/94
Summary: Among the total of 730 kindergartens in Slovenia surveyed
for indoor radon concentrations by Lucas cells under closed conditions, a
kindergarten with a value of 900 Bq/m(3) was selected for additional
investigations. To obtain average radon concentrations and equilibrium
factors, track-etch detectors were exposed all the year round. An annual
dose equivalent to the bronchi of a five year child of 26 mSvy(-1) was
estimated.
- Type of paper
: Paper in proceedings
Title: 24. An example of elevated indoor radon concentrations in
a kindergarten in Slovenia
- Authors:
- Vaupotič, Janja
- Jovanovič, Peter
- Planinić, Josip (37444)
- Kobal, Ivan
Proceedings title: Proc. of the Int.Conf.on "Radiation and Society:Comprehending Radiation Risks"
Language: engleski
Place: Paris, France
Year: 1994
ISBN/ISSN: .
Meeting: Conference on "Radiation and Society:Comprehending Radiation Risks"
Held: from 10/24/94 to 10/28/94
Summary: In a survey of indoor radon in kindergartens and schools in
Slovenia (about 1600), instantaneous air concentrations were obtained under
closed conditions in winter time by modified Lucas cells /1/. In 2,0 % of
all cases (33 buildings), indoor radon concentrations exceed 1000 Bq/m(3)
/2,3/.
- Type of paper
: Paper in proceedings
Title: 16.Radon measurements in kindergartens of Osijek
- Authors:
- Planinić, Josip (37444)
- Vaupotič, Janja
- Kobal, Ivan
Proceedings title: Proc. of the Second International Workshop on Radon Monitoring in Radioprotectio
Language: engleski
Place: Trieste, Italija
Year: 1991
Meeting: Second International Workshop on Radon Monitoring in Radioprotection
Held: from 11/27/91 to 12/04/91
Summary: Indoor radon concentrations in the kindergartens of Osijek
were measured with alpha scintillation cells, LR-115 nuclear track
detectors, as well as Radhome semiconductor detector, and average values of
50.2, 43.7 and 47 Bq/m(3) were obtained respectively. Under the worst
conditions, the annual radon effective dose equivalent was 10 mSv/y. Using
the bare and filtered LR-115 detectors, the average equilibrium factor was
assessed as 0.36, indoors. Measurements of the gamma dose rate in the
kindergartens did not show any sigmificant correlation with the radon
concentration in the air.
- Type of paper
: Invited lecture
Title: Radon measurement by two SSNT detectors
Institution: Jožef Štefan Institut
Year: 1991
- Type of paper
: Invited lecture
Title: The equilibrium factor for radon
Institution: Universitaet in Goettingen