Page 95 - AERB Annual Report 2020

Table 4.3 (a) : Radiation Doses Received by Workers in Medical, Industrial and Research
Institutions (2020)*

No. of Workers Received No. of Persons
Category of No. of Average No. of Averaged Annual Individual Dose who Received
Radiation Monitored Dose for Persons Dose Excluding zero Dose (mSv) Cumulative
Worker Persons monitored Receiving among Dose >100
Persons Dose Dose 0<D 20<D 30<D D>50 mSv during
(mSv) Receivers ≤20 ≤30 ≤50 5-year block
(mSv) (2015 to 2019)
Diagnostic
X- rays 122796 0.17 29941 0.69 29933 8 0 0 19
Radiation
Therapy 14865 0.09 3070 0.42 3070 0 0 0 0
Nuclear 2457 0.32 1019 0.78 1019 0 0 0 1
Medicine
Industrial 7342 0.32 1898 1.24 1895 3 0 0 8
Radiography
Radiation
Processing 134 0.03 10 0.35 10 0 0 0 0
Facility
Research 3920 0.06 680 0.35 680 0 0 0 0
Total /Avg 151514 0.17 36618 0.69 36607 11 0 0 28
* Data (External dose) as on March 3, 2021 with National Occupational Dose Registry System
(NODRS). The data does not include excessive exposure cases above investigation levels which
are currently under investigation.

During 2020, total 8 radiation workers in exceeded radiation exposures in different ranges
diagnostic radiology (X-ray) and 3 workers in during the year 2019, was given in Table 4.3(a) of
Industrial Radiography received radiation dose AERB Annual Report for the year 2019. The
between 20 to 30 mSv due to non-standard information for the year 2019 is now updated
operating practice. incorporating the outcome of excessive exposure
cases that have been concluded and is given in
The information on number of workers in Table 4.3(b) below.
medical, industrial and research institutions, who

Table 4.3 (b): Radiation Doses Received by Workers in Medical, Industrial and Research
Institutions (2019*)

(updated after investigations on workers who have received doses above investigation levels and
receipt of more data)

Category of No. of Averaged No. of Average No. of Workers Received Annual
Radiation Monitored Dose for Persons Dose among Individual Dose Excluding zero
Worker Persons Monitored Receiving Dose Dose (mSv)
Persons Receivers
(mSv) (mSv) 20<D 30<D
0<D ≤20 D>50
≤30 ≤50
Diagnostic
X-rays 139075 0.29 47224 0.86 47165 49 8 2

Radiation
Therapy 16636 0.17 4843 0.6 4840 2 1 0
Nuclear 2788 0.63 1741 1.01 1741 0 0 0
Medicine
Industrial
Radiography 7791 0.48 2592 1.43 2583 6 1 2
Radiation
Processing 113 0.11 20 0.61 20 0 0 0
Facility

Research 4539 0.14 1228 0.52 1228 0 0 0

Total /Avg. 170942 0.29 57648 0.86 57577 57 10 4

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AERB Annual Report 2020