Table 2 Data extracted from UNSCEAR reports about annual average E (Effective doses) due to natural sources
Activity | Annual average E (mSv/yr) | Radiation source |
|---|---|---|
Natural background due to external exposure (cosmic rays; terrestrial radionuclides) | 0.9 (0.4; 0.5) | Cosmic rays, terrestrial radionuclides |
Natural background due to internal exposure (inhalation; ingestion) | 1.5 (1.2; 0.3) | Terrestrial radionuclides |
Total natural background, worldwide | 2.4 | Cosmic rays, terrestrial radionuclides |
Natural background due to cosmic rays, world average | 0.380 | Cosmic rays |
Natural background due to cosmic rays, sea level | 0.270 | Cosmic rays |
Natural background due to cosmic rays, 1600 m amsl | 0.570 | Cosmic rays |
Natural background due to cosmic rays, 2200 m amsl | 0.820 | Cosmic rays |
Natural background due to cosmic rays, 3900 m amsl | 2.020 | Cosmic rays |
8 hours of flight (London-New York) | 0.030 – 0.045 per flight | Cosmic rays |