250 km from Dai-Ichi: Horinouchi, Hachioji/Tokyo

Contamination Map

Hachioji Newspaper publishes measurments

Measurments in public park`s are pretending a low radiation = ~0.1 μSv/h

Drain in Horinouchi, Hachioji/Tokyo

Drain Measurment taken every 60cm

Drain Segment #

Total (μSv/h)

1 0,352 0,363 0,444 0,395 0,3456 0,257 0,288 0,339 0,295

10 0,3211 0,5412 0,47513 0,4314 0,3415 0,4016 0,3217 0,3418 0,4519 0,4720 0,3821 0,3822 0,3223 0,5024 0,4125 0,3326 0,2727 0,3628 0,3529 0,4330 0,3631 0,3932 0,3533 0,3534 0,3235 0,3736 0,3037 0,28538 0,3339 0,3640 0,205

Drain BDrain

Segment #Total (μSv/h)

1 0,34

2 0,32

3 0,25

4 0,385

5 0,42

6 0,35

7 0,29

8 0,415

9 0,36

10 0,47

11 0,395

12 0,35

13 0,38

14 0,405

15 0,28

16 0,37

17 0,445

18 0,39

19 0,24

20 0,385

21 0,32

22 0,35

23 0,37

24 0,4625

25 0,395

26 0,36

27 0,415

28 0,41

29 0,41

30 0,36

31 0,5

32 0,525

33 0,585

34 0,45

35 0,495

Drain A

Results for Measurments show a Contamination

Drain without Soil vs. Drain with Soil

Sample Collection and Decontamination

Drain After Decontamination

Measurment after decontamination = 0.325 μSv/h

A decrease of approx. 0.3 μSv/h

Measurements of Single Samples

Nuclide Bq/UnitAg-110M 0.5Am-241 3.7Ba-133 0.9Ce-144 5.1Co-58 0.3Co-60 0.1Cr-51 7.9Cs-134 590.0Cs-137 740.0Eu-154 0.5Eu-155 3.4Fe-59 0.3Mn-54 0.3Na-24 0.0Nb-95 0.3Rh-106 3.9Ru-103 0.7Sb-124 0.3Sb-125 2.0Zn-65 0.7Zr-95 0.4

Spectrum file Analysed: Probe A32 50g 29.07.11 Tokio 864 Sample Title : A32 50g Bodenprobe Tokio 29.07.11 86400s

Live Time: 86400.0 Secs. True Time: 86486.2 Secs. Dead Time: 0.10% Spectrum saved: 1-Sep-2011 at 19:31 Collected on 31-Aug-2011 at 18:22 Sample taken on 29-Jul-2011 at 10:00 Decayed 33 Days, 502 mins. Sample Size is 1.0000 Unit

Spectrum & Activity Analysis

Cs134 = ~10000 Bq/kg

Cs137 = ~14000 Bq/kg

HPGe - Gamma-Spectrometer