Page 44 - AERB Bulletin English

Safety Statistics

Public Exposure Perspective of Doses

Threshold for Mortality
AERB imposes limits on radioactive liquid and gaseous
20,00,000
discharges from operating nuclear and radiation facilities. These
limits are decided by experts and very conservative such that Radiation Sickness Appears
there is no adverse effect on the health of public or environment. 10,00,000
Apart from prescribing limits AERB verifies conformance to First Signs of Radiation Effects
these limits. Radiation dose to the members of the public near 500,000
the operating plants is estimated based on gaseous release and
Emergency Worker Dose Limit/yr
measurements of radionuclide concentration in items of diet, i.e.
250,000
vegetables, cereals, milk, meat, fish etc., and through intake of
Risk of Health Effects insignificant
air and water.
100,000
During 2019, the liquid and gaseous radioactive
wastes discharged to the environment from the operating Thyroid Scan
units were only a small fraction of the prescribed technical 43,000
specification limits. The effective dose to public due to the Thallium Cardiac Stress Test
radioactive discharges were estimated to be far less than the
36,000
annual limit of 1 mSv (1000 micro-Sievert) prescribed by AERB.
Occupational Dose Limit/yr
AERB has prescribed a public dose limit of 1 mSv (1000 micro- 30,000
Sieverts) per year. All operating NPPs maintained an exclusive One Chest CT Scan
zone boundary at 1.6 km radius within which no habitation is 7,000
allowed.
Natural Background/yr
2,400

Public Dose Limit/yr
1,000
One Chest X-ray
100
One 10 hr. Air flight
50
Actual Annual Radiation Dose
from Operation of NPPs
at Exclusion Boundary
< 15
All Values in Micro-Sievert

Public Dose at 1.6 km Distance (Exclusion Boundary) for NPPs

Note: Public dose at Rawatbhata and Kalpakkam sites are relatively higher as compared to other reactor sites,
due to release of Ar-41 from RAPS-2 and MAPS.

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AERB BULLETIN 2019
AERB BULLETIN 2019