The potential risk from 222radon posed to archaeologists and earth scientists: reconnaissance study of radon concentrations, excavations, and archaeological shelters in the Great Cave of Niah, Sarawak, Malaysia.
This reconnaissance study of radon concentrations in the Great Cave of Niah in Sarawak shows that in relatively deep pits and trenches in surficial deposits largely covered by protective shelters with poor ventilation, excavators are working in a micro-environment in which radon concentrations at the ground surface can exceed those of the surrounding area by a factor of > x 2. Although radon concentrations in this famous cave are low by world standards (alpha track-etch results ranging from 100 to 3075 Bq m(-3)), they still may pose a health risk to both excavators (personal dosemeter readings varied from 0.368 to 0.857 mSv for 60 days of work) and cave occupants (1 yr exposure at 15 h per day with an average radon level of 608 Bq m(-3) giving a dose of 26.42 mSv). The data here presented also demonstrate that there is considerable local variation in radon levels in such environments as these.
Gillmore
Gavin
G
School of Archaeological and Environmental Sciences, University of Bradford, Bradford BD7 1DP, UK. G.K.Gillmore@bradford.ac.uk
Gilbertson
David
D
Grattan
John
J
Hunt
Chris
C
McLaren
Sue
S
Pyatt
Brian
B
Mani Banda
Richard
R
Barker
Graeme
G
Denman
Antony
A
Phillips
Paul
P
Reynolds
Tim
T
D001106:Archaeology; D004784:Environmental Monitoring; D055593:Geological Phenomena; D005844:Geology; D006801:Humans; D008296:Malaysia; D016273:Occupational Exposure; D011886:Radon / Q000506:poisoning*; D018570:Risk Assessment; D012990:Soil Pollutants, Radioactive / Q000506:poisoning*; D014691:Ventilation
D012990:Soil Pollutants, Radioactive; D011886:Radon