Committed Effective Dose by Food Category
| Type | Natural radionuclides |
Artificial radionuclides |
|---|---|---|
 Vegetable |
0.029 | 0.00049 |
 Fruit |
0.0017 | 0.00011 |
 Bread, noodles |
0.0043 | 0.000063 |
 Rice, wheat |
0.010 | 0.00017 |
 Beans, peas, sesame seeds |
0.0066 | 0.00058 |
 Meats |
0.0071 | 0.000052 |
 Seafood |
0.58 | 0.00053 |
 Seaweed |
0.019 | 0.000041 |
| Type | Natural radionuclides |
Artificial radionuclides |
|---|---|---|
 Mushroom |
0.0038 | 0.00046 |
 Potatoes |
0.0028 | 0.000052 |
 Egg |
0.0028 | 0.0000062 |
 Milk, dairy products |
0.0048 | 0.00014 |
 Confectionaries |
0.0014 | 0.000071 |
 Drinks |
0.072 | 0.0011 |
 Condiments, spices |
0.045 | 0.00017 |
| Natural radionuclides | 210Pb,210Po,226Ra,232Th,238U |
| Artificial radionuclides | 90Sr,137Cs,239+240Pu |
| Radioactivity survey data | Environmental radioactivity level survey (1989-2005) Food sample radioactivity level survey (1989-2005) |
| Food intake data | National Health and Nutrition Survey 2005, Ministry of Health, Labour and Welfare |
Note: The calculation results are subject to change without prior notice associated with changes to the data used for the calculation.
Comparison with Various Radiation Sources
Reference: Nuclear Energy 2003 (Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry)
Radiation Dose from Daily Food
For this survey, we request five households in each prefecture to prepare an extra portion of food and drinks they consume in a day and use that as analysis samples. This allows us to get a picture of the typical radiation dose (committed effective dose) we receive from our daily food.
Committed effective dose received from daily food (1989-2005)
| Nuclide name | Effective dose coefficient (*1) (mSv/Bq) |
Average radioactivity concentration (Bq/person·day) |
Number of detections | Number of samples | Committed effective dose (mSv) |
|---|---|---|---|---|---|
| Sr-90 | 0.000028 | 0.056 | 2619 | 2834 | 0.00057 |
| Cs-137 | 0.000013 | 0.048 | 4236 | 5551 | 0.00023 |
| Th-232 | 0.00023 | 0.00079 | 69 | 70 | 0.000066 |
| U-238 | 0.000045 | 0.012 | 70 | 70 | 0.00020 |
(*1): From ICRP Publ. 72
For this calculation, Sr-90 and Cs-137 were selected as the representatives of artificial radionuclides and Th-232 and U-238 as the representatives of natural radionuclides.