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Abstract
Survey of Surat Thani Province’s Hot Spring Revisited in 2009
Paitoon Wanabongse*, Wuthidej Thorarith*, Nopporn Yimchalam*,
†
Somchai Bovornkitti
†
*Thailand Institute of Nuclear Technology, Royal Institute of Thailand
A recent survey of Wat Tharnnamron hot spring in Tashang District, Surat Thani Province, revealed a
maximum external gamma radiation of 1,200 microroentgens per hour and a maximum radon concentration
of 2,823.7 Becquerels per liter. These values substantially confirm the presence of a significant amount of the
226
long-lived radionuclide Ra, which is a bone-seeking radioisotope. The investigators propose as necessary a
measure that should be undertaken by the local authority, that is, to erect a warning sign providing brief
information about the risk of exposure to the radioactive gas in order to prevent any adverse effect resulting
from exposure, especially from consuming the water.
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Key words: hot spring, radon gas, Ra, gamma radiation, measure for safety