Combined
Services Caving Association
Radon
Survey Results For South Wales Caves
Summer
99 & Winter/Spring
2000
by Chris
Constable
1.
It
should be noted that Radon monitoring in caves, in my opinion, is a rather hit
and miss science. We have had
greatly varying readings due to position and time of year. However some caves have considerably
higher readings than others do and this has proved
consistent.
2.
The
Ionising Radiation’s Regulations 1999 become applicable if the radon gas
concentration exceeds 400 Becquerles per metre cubed (whatever happened to
rads?).
3.
You can
draw your own conclusions from these results, if you wish to know more contact
Chris
Constable
CAVE |
POSITION |
RADON
CONCENTRATION
Bq
m3 |
| Llygad
Llwchwr |
Boulder
chamber River
chamber 2 High
level passage |
1293 1716 1374 |
| Bridge
Cave |
Main
chamber |
553 |
| Ogof
Fechan |
Bottom
of entrance choke Sand
chamber far side First
canal far end |
448 633 783 |
| Eglwys
Faen |
End
of western series The
warren |
400 1085 |
| Craig
y nos Quarry cave |
Sand
chamber |
1108 |
| Little
Neath River Cave |
Canal
by-pass Bouncing
Boulder hall Mud
Hall Far
end of canal |
1697 2346 2644 2400 |
| NB My
House |
Basement
kitchen |
193 |
| Wills
Hole |
Average |
300 * |
| Ogof
Clogwyn |
Average |
570 * |
| Ogof
Y Ci |
Average |
2000 * |
| Ogof
Pasg/Foel Fawr |
Average |
800 * |
| Porth
yr ogof |
Average |
120
* |
·
Readings
from independent sources.
I am at
present wearing a personal detector to ascertain my individual dose and will let
any interested party know the results in a future
newsletter.