Instigated by relatively high cave-air CO2 concentrations in Modrič Cave (Croatia) recorded
for the purpose of speleothem-based paleoclimate research, we established preliminary …

A comprehensive radon survey has been carried out in seven caves located in the western
half of Romania's most significant karst regions. Touristic and non-touristic caves were …

In many countries, caves can pose an economic interest for the authorities and stakeholders.
The development of a show cave requires, apart from the conservation issues, to ensure the …

Bulgaria is a country in the eastern part of the Balkan Peninsula, in South-eastern Europe.
The presence of many mountains and karst areas is a prerequisite for a large number of …

Radon monitoring at potentially highly radioactive location such as caves is important to
assess the radiological hazards to occupational workers and occasional visitors. In its …

This study reveals the influence of some climatic elements on radon concentration in Saeva
Dupka Cave, Bulgaria. The research is based mainly on statistical methods. Radon …

Concentrations of radon and radon daughters in several karst caves were measured and
annual doses for medical staff and patients were estimated. The results show that radon …

Measurements of radon concentration were performed at three geomorphologically different
locations in Postojna Cave, Slovenia. In the part of the cave open to visitors, annual average …

NIGGG, BAS Sofia carries out a multi-parametric monitoring (Rn and CO2 concentration in
the cave air and underground water, humidity, temperature, ventilation etc.) in the caves of …

According to international recommendations Bulgarian national legislation defined the
reference level for the annual average activity radon concentration of 300 Bq/m3 [6] …