Xác định liều chiếu trong của p 32 cho nhân viên bức xạ bằng phân tích nước tiểu và đo nhấp nháy

Tap chf KHOA HOC DHSP TP HCM So 30 ndm 2011

XAC DINH LifeU CHlfeU TRONG CUA P-32

CHO NHAN VIEN BLTC XA BAN G PHAN TICH NlTOfC TIEU

vA DO NHAP NHAY LONG

NGUYS N VA N HONG', PHAM HON G THAI "

T6M TAT

Mdu nudc tiiu cua dSi tugng bj nhiim xg P-32 dugc thu gdp, xu ly hda hgc rdi do

hogt dg beta trin he nhdp nhdy Idng ALOKA-LSC-6100. Sau dd, diing chuang trinh

chuyin dung MONDAl 3.0 sS tinh dugc liiu hieu dung Kit qud nghiin ciru dugrc dp dung

xdc dinh liiu cho nhdn vien birc xg d Vien Nehien ciru hgt nhdn. Ngodi ra phuang phdp

ndy ciing dugc so sdnh vdi phuang phdp do bdng Sngjim GM vd kit qud cho thdy nd cho

dg nhgy vd dg chinh xdc cao han khi ddi tugng bf nhiim xg P-32 & mure hogt dg thdp.

Tir khda: xdc dinh lilu chieu trong, do nhap nhdy I6ng, lilu hi?u dyng (lieu todn than).

ABSTRACT

Determining internal dosimetry ofP'32for radiation workers by analysis

of the human urine and liquid scintillation counting

Urine samples from the subjects internally contaminated with P-32 are collected,

chemically processed, and measured beta activity by the liquid scintillation counting

system of ALOKA-LSC-6100. Then, effective doses are calculated by using the specialized

software ofMONDAL3.0. The results are applied in dosimetry for the radiation workers in

the Nuclear Research Institute. Besides, this method is also compared with that of using

GM counter, and the result is shown it gives sensitivity and accuracy better in the case of

subjects contaminated at low activity level.

Keywords: internal radiation dosimetry, liquid scintillation counting, effective dose

(dose for whole-body).

1. Mfrdau

Dinh lieu chilu trong doi voi cdc dong vj ph6ng x^ phdt beta bdng phuong phdp

do nhdp nhdy 16ng dd dugrc nghien cuu vd dp dvmg pho biln tai nhilu phong thi nghiem

tren the gioi [4, 5]. T^i Vift Nam, phuong phdp ndy tuy con khd moi me nhung da

dugrc ap dyng 6r mgt^sd co so nghien cuu trong linh vuc moi tiorong, tiuiy vdn ddng vi

do CO mgt so tinh chat uu vift cua phuong phdp ndy nhu dg nhay xdc dinh tdt, do chinh

xdc ciia phuong phdp cao... Vi vdy, nlu sir dyng phuong phdp ndy dl xdc dinh P-32

trong nuoc tieu nguoi phyc vy cho viec xdc dinh lilu chilu ti-ong se co y nghia thilt

thuc hon vi mo rgng dugrc khd ndng xdc djnh lieu chilu ti-ong 6 muc boat do tiidp [3,

" TS, Vi$n Nghifen ci>u Hgt nhdn Dd Lgt

ThS, Vi$n Nghi6n cCi-u Hgt nhSn Dd Lgt

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