Table 1 Committed effective ingestion dose estimates for adult residents in the Tohoku Region (µSv per annual seafood intake)

Radionuclides		Before the accident	0−1 yr	1–3 yrs	3−10 yrs
Radionuclides		Before the accident	After the accident
⁹⁰Sr, ^110mAg, ¹³¹I, ¹³⁴Cs, ¹³⁷Cs, ^239,240Pu	95th%^a	3.4	19	5.1	1.9^e
	AM^b	0.96	5.8	2.1	0.83
	50th%^c	0.74	3.3	1.6	0.62
	5th%^d	0.25	0.68	0.54	0.28
¹³⁴Cs, ¹³⁷Cs	95th%	2.0	15	4.3	1.3
	AM	0.58	4.3	1.8	0.65
	50th%	0.51	2.4	1.5	0.56
	5th%	0.23	0.48	0.53	0.26
All (includes natural radionuclides)	95th%	1129	1142	1128	1125
	AM	465	469	465	464
	50th%	347	349	348	347
	5th%	147	148	147	147

^a95th%: 95th percentile.
^bAM: arithmetic mean.
^c50th%: 50th percentile.
^d5th%: 5th percentile.
^eThe 95th% value for 3–10 years after the accident is not significantly different from the pre-accident value. The slightly lower apparent value reflects uncertainties in the data, particularly in the upper tail of the distributions, as well as slight decreases in ambient radionuclide concentrations over time due to radioactive decay and dispersion. Results for all radionuclides are shown at the µSv level to indicate computational differences only for comparison with results for other radionuclides. In Fig. 3, these values are rounded to avoid implying undue precision.
Results for the pre-accident period, 1–3 years after the accident, and 3−10 years after the accident are presented as averaged annual doses in Phases I, V, and VI, respectively. The result for the first year after the accident is presented as the sum of doses in Phases II, III, and IV.
The doses from ⁹⁰Sr, ^110mAg, ¹³¹I, ¹³⁴Cs, ¹³⁷Cs, and ^239,240Pu before the accident originate from past atmospheric weapons test fallout or other nonspecific sources.

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