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˜µ¦µŠš¸É 3 —Š‡n µÁŒ¨¸É¥„´ ¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Šœ·ªÅ‡¨—r 40K 226Ra ¨³ 232 Th Ĝ˜´ª°¥nµŠ—·œ‹µ„ 6 °Î µÁ£° °Š
‹´Š®ª´—¡´š¨»Š ž¦·¤µ–¦´ Š¸Â„¤¤µ—¼—„¨ºœ (D) „´¤¤´œ˜£µ¡¦´Š¸ ¤¤¼¨ °ŠÁ¦Á—¸¥¤ (Raeq) —´œ¸ ª´—‡ªµ¤Á¸É¥Š¦´Š¸š¸É
ŗo¦´‹µ„£µ¥œ°„¦nµŠ„µ¥ (Hex)¨³ž¦·¤µ–¦´Š¸¥´ŠŸ¨š¸Éŗo ¦´‹µ„£µ¥œ°„¦n µŠ„µ¥ž¦³‹Îµže(AEDout) ¨³Áž¦¸¥Áš¸¥
„´ o°¤¼¨ °Š UNSCEAR (1988,1993,2000)
™µœš¸É
(‹Î µœªœ˜´ª°¥nµŠ)
S.A (average) (Bq/kg) D
(nGy/h)
Raeq
(Bq/kg) Hex
AEDout
(mSv/y)
40K 226Ra 232Th
°.žiµ¡³¥°¤ (10) 3377.62 91.12 67.46 223.69 447.30 1.21 0.27
°.«¦¸¦¦¡˜ (7) 5127.25 139.94 78.56 325.91 646.57 1.75 0.40
°.‡ªœ œ»œ (17) 1878.05 79.39 53.21 147.13 299.88 0.81 0.18
°.«¦¸œ‡¦·œš¦r (8) 6356.39 175.98 95.18 403.85 800.91 2.16 0.50
°.Á¤º°Š (19) 3444.73 157.53 86.64 268.75 546.28 1.48 0.33
°.„Š®¦µ (8) 6893.66 247.74 137.10 497.21 1000.89 2.71 0.61
‡nµÁŒ¨¸É¥ 4512.95 153.12 86.36 311.09 623.64 1.69 0.38
UNSCEAR(1988,
1993, 2000) –* –* –* 55.00 370.00 1.00 0.48
**Ťn¤¸o°¤¼¨
°£·ž¦µ¥Ÿ¨„µ¦ª·‹´ ¥
1. Ÿ¨„µ¦ª·Á‡¦µ³®rÁ·Š‡»–£µ¡ (qualitative analysis) Á„¸É¥ª„´œ·— °ŠÅ°ÃŽÃšžš¸É¤¸°¥¼n Ĝ˜´ª°¥nµŠ—·œ
ŰÎڞµ¦„´¤¤´œ˜¦´Š¸š¸É˜¦ª‹¡Äœ˜´ª°¥nµŠ—·œ – ¦· Áª–˜nµŠ Ç ‹Îµœªœ 69 ˜´ª°¥nµŠ ‹µ„ 6 °ÎµÁ£°šµŠ
˜°œœ °Š‹´Š®ª´—¡´š¨»Š ץŰÎڞ °Šµ¦„´¤¤´œ˜¦´Š¸š¸É˜¦ª‹¡œ¸Ê¤¸°¥¼nĜ°œ»„¦¤š°Á¦¸¥¤ ‡º° 208Tl, 212Pb,
228Ac ¨³Äœ°œ»„¦¤¥¼ Á¦Áœ¸¥¤ ‡º° 214 Pb ¨³ 214Bi ¥´Š¤¸ ŰÎڞµ¦„´¤¤´œ˜¦´Š¸Äœ˜´ ª°¥nµŠ—· œ Ž¹ÉŠÁ„· —‹µ„„µ¦
„¦³šÎµ °Š¤œ»¬¥r ‡º° 137Cs œ°„‹µ„œ¸Ê ¥´Š¡ªn µ¤¸Å°ÃŽÃšžµ¦„´¤¤´œ˜¦´Š¸š¸ÉŤnŗo°¥¼n Ĝ°œ»„¦¤„´¤¤´œ˜¦´Š¸Ä— Ç
༡ 40K
2. Ÿ¨„µ¦ª·Á‡¦µ³®rÁ·Šž¦·¤µ– °Š‡n µ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Š 40K, 226 Ra, 232Th ¨³ 137Cs Ĝ˜´ª°¥nµŠ—·œ
‹µ„ 6 °ÎµÁ£° °Š‹´Š®ª´—¡´š¨»Š
Á¤ºÉ°¡·‹µ¦–µ‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³ °Šœ·ªÅ‡¨—r 40K 226Ra 232Th ¨³ 137Cs Ĝ˜´ª°¥n µŠ—·œ – ¦·Áª–˜nµŠ Ç
‹Îµœªœ 69 ˜´ª°¥n µŠ ‹µ„ 6 °ÎµÁ£° °Š‹´Š®ª´—¡´š¨»Š —´ŠÂ—ŠÄœ˜µ¦µŠš¸É 1 ¡ªnµ ¤¸‡nµ¡· ´¥°¥¼nĜn ªŠ 148.17-11276.78
Bq/kg 宦´ 40K 5.44-518.45 Bq/kg Î µ®¦´ 226Ra 4.46 - 236.19 Bq/kg 宦´  232 Th ¨³ 0.00-12.39 Bq/kg
宦´ 137Cs ¤¸‡nµÁŒ¨¸É¥Áž}œ 4512.95 ± 226.71 Bq/kg, 153.12 ± 7.20 Bq/kg 86.36 ± 5.76 Bq/kg ¨³ 1.71 ± 0.80
Bq/kg ˜µ¤¨Îµ—´Ž¹ÉŠÅ—o—ŠŸ¨Ã—¥¦»ž Ĝ˜µ¦µŠš¸É 1
3. Ÿ¨„µ¦Áž¦¸¥Áš¸¥‡nµÁŒ¨¸É¥ °Š‡nµ„´¤¤´œ˜£µ¡‹ÎµÁ¡µ³Äœ˜´ª°¥nµŠ—·œ ‹µ„ 6 °ÎµÁ£° °Š‹´Š®ª´—¡´š¨»Š
„´  o°¤¼¨ °ŠÎµœ´„Šµœž¦¤µ–¼Á¡ºÉ °´œ˜·š¸É¤¸°¥¼n Ĝž¦³Áš«Åš¥Â¨³ o°¤¼¨‹µ„„µ¦ª·‹´¥š´É ªÃ¨„