757
P11
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Specific Activities and Radioactive Contour Maps of Natural Radionuclides in Beach
Sand Samples from Chalatat, Samila and Sai Kaew Beaches
in Songkhla Province, Thailand
ðøąÿÜÙŤ
ǰđÖþøćíĉ
Ùč
è
1
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2
ǰùìĆ
÷øĆ
êîŤ
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âÙøĂÜßĊ
ó
3
ǰöĎ
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4
Ēúąÿč
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éöÿöóø
5
Prasong Kessaratikoon
1
, Nikom Choosiri
2
, Ruthairat Boonkrongcheep
3
, Murnee Daoh
4
and Suchin Udomsomporn
5
ïìÙĆ
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íøøößćêĉ
(
40
K,
226
Ra Ēúąǰ
232
Th)ǰĔîêĆ
üĂ÷Š
ćÜìøć÷ßć÷ĀćéÝĞ
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(
40
K,
226
Ra Ēúąǰ
232
Th)ǰöĊ
ÙŠ
ćóĉ
ÿĆ
÷đðŨ
î 145.51 – 4574.12 ǰ6.99 – 451.87ǰĒúąǰ9.13 –ǰ655.76
Bq/kg ĒúąöĊ
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r
125.01 ǰ45.81
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4.18 Ēúą48.86ǰ
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Abstract
The specific activities of natural radionuclides (
40
K,
226
Ra and
232
Th) in 90 beach sand samples
collected from Chalatat (30), Samila (30) and Sai Kaew (30) beaches in Songkhla province in southern
region of Thailand, have been measured and analyzed. It was found that the specific activities of
40
K,
226
Ra
and
232
Th ranged from 145.51 – 4574.12,ǰ6.99 – 451.87ǰand 9.13 –ǰ655.76 Bq/kg and the average values of
808.96
r
125.01 ǰ 45.81
r
4.18 and 48.86ǰ
r
2.49 Bq/kg, respectively. Furthermore, the results were also
compared with the Office of Atoms for Peace (OAP) annual report data, Thailand and global radioactivity
measurements and evaluations. Moreover, the radioactive contour maps of the investigated area were
also created by using all values of specific activities of the
40
K,
226
Ra and
232
Th.
Keywords:
Specific Activity, Natural Radionuclide, Beach Sand,
Radioactive Contour Map
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Corresponding author Tel.: ǰ0815423598. E-mail address:
