Table 1. Distribution of detected artificial radionuclides and 40K, and 134Cs: 137Cs ratios in surface soils collected at Kawauchi Village, Fukushima Prefecture.
| Points | Distance fromFNPP (km) | Radionuclide concentration in Bq/kg-dry | Radionuclide ratio | ||
| 134Cs (2.1 y)a | 137Cs (30 y) | 40K (1.3×109 y) | 134Cs/137Cs | ||
| 1-A | 25.5 | 5915±35b (30)c | 7208±39 (24) | 703±50 (74) | 0.82 |
| 1-B | 25.5 | 398±6.8 (10) | 543±7.8 (9.3) | 511±30 (49) | 0.73 |
| 1-G | 22.5 | 1554±13 (14) | 2015±15 (12) | 888±40 (42) | 0.77 |
| 2-A | 22.2 | 2393±24 (23) | 2962±27 (17) | 999±63 (85) | 0.81 |
| 3-A | 21.7 | 20.0±1.7 (3.3) | 25.4±1.9 (3.4) | 853±37 (42) | 0.79 |
| 3-B | 21.7 | 2637±17 (17) | 3416±20 (13) | 834±38 (42) | 0.77 |
| 3-C | 21.7 | 495±8.0 (8.2) | 618±8.9 (7.1) | 803±40 (49) | 0.80 |
| 3-D | 21.7 | 219±4.5 (4.8) | 275±5.2 (4.5) | 786±34 (36) | 0.80 |
| 3-F | 21.8 | 2822±23 (21) | 3472±26 (16) | 744±49 (69) | 0.81 |
| 3-G | 21.4 | 1628±14 (17) | 2011±16 (16) | 606±35 (49) | 0.81 |
| 3-H | 21.5 | 629±7.3 (7.3) | 803±8.4 (5.7) | 600±28 (29) | 0.78 |
| 3-I | 21.5 | 2394±17 (15) | 3016±19 (12) | 630±34 (43) | 0.79 |
| 4-A | 24.7 | 6867±56 (48) | 3570±61 (37) | 638±75 (152) | 1.92 |
| 5-A | 20.5 | 3574±24 (21) | 4480±27 (17) | 445±36 (56) | 0.80 |
| 6-A | 23.0 | 7191±28 (30) | 9158±32 (28) | 783±37 (51) | 0.79 |
| 6-B | 22.4 | 1374±14 (18) | 1763±16 (18) | 569±37 (60) | 0.78 |
| 7-A | 25.1 | 4363±28 (25) | 5442±31 (19) | 923±52 (66) | 0.80 |
| 7-D | 23.5 | 222±7.1 (11) | 300±7.9 (10) | 658±45 (68) | 0.74 |
| 7-F | 20.8 | 5141±28 (24) | 6449±32 (18) | 669±42 (63) | 0.80 |
| 7-H | 20.0 | 30628±60 (48) | 37108±63 (35) | 131±38 (114) | 0.83 |
| 7-I | 20.0 | 1809±13 (12) | 2282±15 (9.3) | 832±35 (39) | 0.79 |
| 8-A | 16.8 | 272366±202 (178) | 340331±226 (151) | 559±67 (181) | 0.80 |
| 8-B | 16.8 | 9275±35 (30) | 11699±40 (23) | 569±36 (53) | 0.79 |
| 8-C | 16.8 | 20453±60 (50) | 25576±67 (34) | 480±45 (94) | 0.80 |
| 8-D | 16.8 | 28308±82 (67) | 35248±90 (50) | 467±51 (113) | 0.80 |
| 8-G | 14.9 | 29480±82 (67) | 36474±90 (52) | 645±55 (106) | 0.81 |
| F-1 | 62.1 | 3018±23 (21) | 3782±26 (16) | 536±41 (62) | 0.80 |
| T-1 | 223 | 9.0±1.4 (3.5) | 11.0±1.6 (3.8) | 401±30 (42) | 0.82 |
a
half-life.
b
error shows one sigma standard deviation from counting statistics.
c
detection limit.