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locations as touristic areas, recreational or for speleotherapy. Therefore, the
monitoring of radon concentration in salt mine should be performed periodically.
Methods: In this paper we present two methods for the measurement of radon
concentration in air with alpha scintillation detector (Pylon AB 5) and system of
monitoring the atmospherically radon with an ionization chamber detector type
in pulse mode (CIS-P5M). The radon measurements were performed for twenty
days in different locations from Ocna Dej salt mine.
Results: The concentration of radon, depending on the location of measurement
points inside salt mine, was (9.6±1.13 - 31.2±2.76) Bq/m 3 measured by the alpha
scintillation cell method while (10.1±1.34 - 29.5±3.35) Bq/m 3 was measured
by the ion chamber method. We conclude that both methods are suitable for the
measurement of radon concentration in salt mine. The radon levels from Ocna
Dej salt mine are lower in comparison to those reported for mines, caves or spas
in other countries where radon therapy and speleotherapy is frequently in use.
Conclusion: In conclusion, taking into account the levels of radon and
environmental conditions, we can say that Ocna Dej salt mine can be considered
as a tourist destination or treatment.
Keywords: alpha scintillation detector, ionization chamber detector, radon, salt mine, therapy
EVALUATION OF THE RADON CONCENTRATION
IN CACICA AND OCNA DEJ SALT MINES
M. R. Calin1 , M.A. Calin2 , M. Zoran2 , Ghe (Iuri) Simionca3 ,
O. Mera4 , I. Radulescu1 1) “Horia Hulubei” National Institute of Physics and Nuclear Engineering – IFIN HH,
Magurele, Romania 2) Nationale Institute of Research and Development for Optoelectronics –
INOE 2000, Magurele, Romania 3) National Institute of Rehabilitation, Physical Medicine and
Balneoclimatology, Bucharest, Romania 4) Turda Salt Mine, Romania
Background: The knowledge of radon concentration levels in underground
environments is essential for therapeutic purposes of different respiratory and
rheumatic diseases. In order to develop speleotherapy in Romania, this paper
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