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COMPARATIVE STUDY OF RADON AND THORON MEASUREMENTS IN FOUR ROMANIAN SHOW CAVES.

B D Burghele¹, A Cucos¹, B Papp¹

¹Babes-Bolyai University, Cluj-Napoca, Romania.

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|October 6, 2017

Summary

This study compared radon and thoron measurements in Romanian caves using different detectors. Results show detector type matters less than microclimate for accurate radon concentration readings.

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Area of Science:

Environmental Science
Radiological Protection
Geophysics

Background:

Show caves are popular tourist destinations with unique microclimates.
Radon and thoron are naturally occurring radioactive gases that can accumulate in enclosed spaces.
Accurate measurement of these gases is crucial for public health and safety.

Purpose of the Study:

To compare the performance of different passive detectors for radon and thoron measurements in Romanian show caves.
To assess the influence of detector type and microclimate on measured activity concentrations.
To provide data for improved radiation monitoring in cave environments.

Main Methods:

Four types of passive detectors (RSKS, RadTrak, CD, Raduet) were deployed in four Romanian show caves.
Measurements were conducted during autumn and winter seasons.
Activity concentrations of radon and thoron were analyzed and compared across detector types and seasons.

Main Results:

Radon concentrations ranged from below detection limit (5 Bq m-3) to 4024 Bq m-3; thoron concentrations ranged from below 10 to 583 Bq m-3.
A strong correlation was observed between RSKS and RadTrak radon detectors (r = 0.96).
Significant differences (over 150%) were found between RSKS and CD radon detector measurements, highlighting detector variability.

Conclusions:

While detector type can influence radon measurements, the microclimate is a more significant factor.
Acknowledging microclimate variations is essential for accurate radon concentration assessments using track detectors in caves.
This research contributes to understanding radiation environments in subterranean tourist attractions.