SVIBOR - Papers quoted in CC - project code: 1-03-008
MINISTRY OF SCIENCE AND TECHNOLOGY
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tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr
SVIBOR - Collecting Data on Projects in Croatia
Papers quoted in Current Contents on project 1-03-008
Quoted papers: 15
Other papers: 10
Total: 25
Title: 1. Dosimetry of the radon and its daughters by two SSNT
detectors
- Authors:
- Faj, Zdravko (86606)
- Planinić, Josip (37444)
Journal: Radiat. Protec. Dosim.
Volume: 35
Year: 1991
Pages: from 265 to 268
Number of references: 13
Language: engleski
Summary: Disintegration, ventilation and deposition (plateout
effect) were considered as removal processes for radon and its daughters in
the air and their concentration equations were used in deriving a
relationship between the equilibrium factor (F) and track densities of the
bare SSNT detector (D) and the filtered one (D0). Using the calibrated
sensitivity coefficient of the LR-115 detector, k=2.64*10(-3) m, and the
measured average track densities (D,D0) in a single house living room in
Osijek during the year 1989, the radon concentration c0=40.15 Bq/m(3),
equilibrium factor F=0.46 and effective dose eqiuvalent H=1.48 mSv/y were
obtained.
Title: 2. Rn-222 detection efficiency and sensitivity coefficient
of the LR-115 nuclear track detector
- Authors:
- Planinić, Josip (37444)
Journal: Health Physics
Volume: 62
Year: 1992
Pages: from 356 to 358
Language: engleski
Title: 4. The efficiency and angular sensitivity of the LR-115
nuclear track detector to alpha patricles
- Authors:
- Planinić, Josip (37444)
Journal: Nucl. Instr. Meth. B
Volume: 71
Year: 1992
Pages: from 95 to 98
Number of references: 8
Language: engleski
Summary: The LR-115 detector sensitivity coefficient was calibrated
(k=0.0343 tr cm(-2) d(-1) per Bq/m(3)=0.40 cm) and detection threshold
energies were determined (E1=0.7 MeV, Eu=3.86 MeV). Measurements of the
alpha particle diameter (d) showed a parabolic dependence on the incident
particle energy (E). Relationships between the detection efficiency,
critical detection angle, k, d and E were derived The empirical effective
value of the critical angle was 59 deg.
Title: 5. Indoor radon concentrations in kindergartens
- Authors:
- Planinić, Josip (37444)
- Vaupotič, Janja
- Kobal, Ivan
Journal: J. Environ. Radioactivity
Volume: 19
Year: 1993
Pages: from 167 to 171
Number of references: 7
Language: engleski
Summary: Indoor radon concentrations in the kindergartens of Osijek
were measured with alpha-scintillation cells, LR-115 nuclear track
detectors, as well as a 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 per year.
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 significant correlation with radon
concentrations.
Title: 9. Thoron activity level and radon measurement by the
nuclear track detektor
- Authors:
- Planinić, Josip (37444)
- Faj, Zdravko (86606)
- Vuković, Branko
Journal: Arch. Indust. Hygiene Toxicol.
Volume: 44
Year: 1993
Pages: from 21 to 26
Number of references: 10
Language: engleski
Summary: Radon activity concentrations in the air were measured with
LR-115 nuclear track detectors at three locations in Osijek. The respective
equilibrium factors and the effective dose equivalents were determined.
Indoor concentrations were from 9.8 to 58.2 Bq/m(3) and relative errors of
the track etching method were near 19 per cent. The indoor alpha potential
energy of the radon and thoron progenies was measured with an ISD detector.
Independent measurements, performed with a Radhome semiconductor detector,
showed that the indoor thoron concentration was nearly 20 per cent of the
radon one.
Keywords: effective dose equivalent, equilibrium factor, indoor radon concentrations
Title: 14. Systematic indoor radon and gamma measurements in
kindergartens and play schools in Slovenia
- Authors:
- Vaupotič, Janja
- Križman, M.
- Planinić, Josip (37444)
- Pezdič, J.
- Adamič, K.
- Stegnar, P.
- Kobal, Ivan
Journal: Health Physics
Number: 5
Volume: 66
Year: 1994
Pages: from 550 to 556
Number of references: 17
Language: engleski
Summary: Systematic measurements of indoor radon concentrations and
gamma dose rates were carried out in the 730 kindergartens and play schools
in Slovenia that, together, care for 65600 children. The main method for
indoor radon measurement was direct sampling in alpha scintillation cells,
but in cases with an increased instantaneous radon concentration, the
additional methods of track-etch detectors and alpha spectroscopy were
applied. In 528 kindergartens and play schools (72%), radon concentrations
were below 100 Bq/m(3), witha geometric mean of 58 Bq/m(3). In 16
kindergartens and play schools(2.2%), radon concentrations exceeded 800
Bq/m(3). In all cases, the main reason for a high indoor radon
concentration was the geological structure of the soil. Gamma dose rates
were measured with a portable scintillation counter, but in the Ljubljana
region thermoluminescence dosimeters were also exposed. The results ranged
from 30 to 295 nGyh(-1), with a geometric mean of 88 nGy h(-1).
Keywords: radon, indoor, children, etched-track, dosimetry, thermoluminescent
Title: 12. Radon level reduction in two kindergartens in Slovenia
- Authors:
- Vaupotič, Janja
- Križman, M.
- Planinić, Josip (37444)
- Kobal, Ivan
Journal: Health Physics
Number: 5
Volume: 66
Year: 1994
Pages: from 568 to 572
Number of references: 5
Language: engleski
Summary: Remedial actions were carried out in two kindergartens with
average heating season radon concentrations of about 2000 Bq/m(3). The
first kondergarten is built on sedimentary gravel and the second one on fly
ash and cinder fill. In both cases, radon accumulated in a sub-floor
channel (service tunnel). The channels were opened at both ends. Natural
ventilation of the tunnels did not produce a sufficient reduction in radon
concentration. A fan was mounted in one kindergarten to ventilate the
channel for 20 min three times each day, thus reducing radon levels to an
acceptable value.
Keywords: radon, indoor, children, spectroscopy,alpha,ventilation
Title: 13. Radon distribution in dwellings
- Authors:
- Planinić, Josip (37444)
- Šuveljak-Šipalo, Božica (86766)
- Faj, Zdravko (86606)
Journal: J. Radiol. Prot.
Number: 3
Volume: 14
Year: 1994
Pages: from 235 to 239
Number of references: 8
Language: engleski
Summary: Radon concentrations inside a flat were measured with a
Radhome semiconductor detector and scintillation cells. An unusual radon
distribution was noticed within one room as well as in basement. An
anomaluos distribution of the radon in the single house, where the radon
concentration of the basement was a factor 4 lower than that of the first
floor for a few days, was explained by variations in the atmospheric
pressure. Radon measurements inside a high building did not show any
significant difference for various floors, but outdoor radon concentrations
on open balconies indicated an exponential decrease of radon concentration
in the atmosphere with altitude.
Title: 15. Radon in schools and dwellings of Osijek
- Authors:
- Planinić, Josip (37444)
- Šmit, G.
- Faj, Zdravko (86606)
- Šuveljak-Šipalo, Božica (86766)
- Vuković, Branko
- Radolić, V.
Journal: J. Radioanal. Nucl. Chem.,Letters
Number: 1
Volume: 191
Year: 1995
Pages: from 45 to 51
Number of references: 7
Language: engleski
Summary: Indoor radon concentrations were measured in 10821 pupils
primary schools of Osijek by means of the Radhome silicon detector. The
values ranged from 15 to 300 Bq/m(3) with the arithmetic and geometric
means of 93.4 and 70.6 Bq/m(3), respectively. Ten years continuous radon
measuremnets performed with the LR-115 nuclear track detector in three
houses of different construction and town area gave means of 27.96 and 23
Bq/m(3); the indoor Rn concentration for a heating period was a factor of
1.5 higher than for the warm season. The average effective dose equivalent
for the primary school pupils was 2.8 mSv/y (with occupancy factor of 0.6,
0.2 and 0.2 for home, school and outdoors, respectively). For citizens of
Osijek it was 1.7 mSv/y.
Title: 10. Radon dose equivalent in dwellings and shelters during
the war in Croatia
- Authors:
- Planinić, Josip (37444)
- Lokobauer, Nevenka
- Franić, Zdenko
- Bauman, Alica
Journal: Health Physics
Number: 3
Volume: 65
Year: 1993
Pages: from 336 to 336
Language: engleski
Summary: During the war in 1991 and 1992, 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 silicon
detector (Radhome) and also, at several locations, by LR-115
nuclear track detector. Indoor radon concentrations measured
in the shelters of Zagreb had the arithmetic average value of
104 Bq/m(3) and the geometric average of 75 Bq/m(3), but the
respective average values in the dwellings were 27 and 25
Bq/m(3). The radon measurements in Osijek had the respective
average values of 92 and 76 Bq/m(3) in the shelters, or 40
and 36 Bq/m(3) in the dwellings. Inhabitants of Osijek and
Zagreb have received, on the average, the effective dose
equivalent of 4.1 and 2.6 mSv y(-1), respectively.
Title: 3. Indoor radon concentrations in kindergartens from
different regions in Yugoslavia
- Authors:
- Vaupotič, Janja
- Križman, M.
- Šutej, T.
- Peternel, M.
- Djurić, G.
- Popović, D.
- Planinić, Josip (37444)
- Faj, Zdravko (86606)
- Kljajić, R.
- Stegnar, P.
- Kobal, Ivan
Journal: Radiat. Protec. Dosim.
Volume: 45
Year: 1992
Pages: from 487 to 490
Number of references: 16
Language: engleski
Summary: In the winter period of 1990-1991 instantaneous radon
concentrations in air were measured in around 450 kindergartens from
different regions from Yugoslavia. Alpha scintillation counting was used as
a screening method, and the measurements were carried out in the rooms
where the children spent the majority of their time. All of the air grab
samples were taken under the same conditions which excluded ventilation of
the interior 12 h prior to sampling. In addition to indoor radon
concentrations, gamma dose rate was measured using portable equipment. The
indoor radon concentrations were generally low, in the range from 10 to 180
Bq/m(3) of air, with an overall average of about 100 Bq/m(3). There were a
few exceptions where indoor radon levels exceeded 150 Bq/m(3); mainly in
old buildings containing higher contents of natural radionuclides in the
building materials, and in cellars or basements of the buildings. In all
rooms with a level exceeding 150 Bq/m(3) of Rn(222) per m(3), solid-state
nuclear track detectors were applied for long-term measurements. In order
to investigate the equilibrium between radon and its short-lived daughters,
mainly with respect to their contribution to the effective dose, alpha
spectrometry is also being introduced in selected kindergartens with
elevated radon concentrations.
Title: 22. Radon distribution in dwellings
- Authors:
- Planinić, Josip (37444)
- Faj, Zdravko (86606)
- Šuveljak-Šipalo, Božica (86766)
Number: nik
Volume: Zbor
Year: 1994
Pages: from 305 to 308
Number of references: 107
Language: hrvatski
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.
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