Tokyo Dome Near Gate 10 (Not the inside of the facility) (Central Tokyo) Sample27

2016/05/28/ 19：00ー19：50

GPS 35.706783,139.752002

Weather: Sunny day　　The day before making the sample: Rainy day
Sample: （wet）(mud)

Sample27

Scintillation Counter DC200（120sec average value）

Major Factor of the hotspot　
Environmentally enriched hotspot under the bridge near Gate 10 of Tokyo Dome.
When it rained, rain water brought fallout to under the bridge. 

Note:
none

The range of the hotspot: 151cm x 95cm

Sampling range of the hotspot: 11cm x 9.5cm
Depth of the hotspot: more than 2.2ｃｍ

Sampling Depth: 2.2ｃｍ

Measurement Data
Measurement Date: 2016/05/29

Cs134   1,968Bq/Kg  ±197Bq/Kg

Cs137 9,356Bq/Kg  ±936Bq/Kg

All Cs   11,324Bq/Kg　
Sample Weights　105.5ｇ
Measurement Time:　1200sec

Gamma Spectroscopy (NaI) Captus 3000B

Readings above the hotspot　

1m　0.06μSv/h、50㎝　0.07μSv/h、5㎝　0.18μSv/h

Readings 3 meters away from the center of the hotspot

1ⅿ　0.08μSv/h、50ｃｍ　0.09μSv/h、5ｃｍ　0.11μSv/h

Sampling Spot

Readings above the hotspot 5cm

Readings above the hotspot 50cm

Readings above the hotspot 1m

Readings 3 meters away from the center of the hotspot

Readings 3 meters away from the center of the hotspot  5cm

Readings 3 meters away from the center of the hotspot  50cm

Readings 3 meters away from the center of the hotspot  1m

Depth of the Sampling Spot

After making a sample of the hotspot

Sampling Spot

Measurement Data

Sampling Spot

Sample115 Mizumoto Park A block ”Kawasemi no Sato” (gutter's mud) (East Tokyo)

2019/03/02/ 13：43ー15：11

GPS 35.794338,139.861267

Weather: Sunny day　　The day before making the sample: Rainy day
Sample: （wet）(gutter's mud)

Sample115

Scintillation Counter Hotspot Finder（30sec average value）

Major Factor of the hotspot　
Administrators in this facility called Kawasemi no Sato took gutter's mud and under a downspout mud. They threw it away in the bush along with the building. Even though the Ministry of the Environment acknowledges that gutter's mud is highly contaminated. Because of the vast amount of the mud, it makes ambient radiation readings 3 meters away from the center of the hotspot quite high.

Note:
none

The range of the hotspot: 220cm x 550cm

Sampling range of the hotspot: 12.5cm x 10cm
Depth of the hotspot: more than 5ｃｍ

Sampling Depth: 2ｃｍ

Measurement Data from Fukushima Preservative Service Association of Health

Measurement Data
Measurement Date: 2019/05/21

Cs134   2,536Bq/Kg  ±32.5Bq/Kg

Cs137 33,033Bq/Kg  ±116Bq/Kg

All Cs    35,569Bq/Kg　
Sample Weights　119.9ｇ
Measurement Time:　1800sec

Readings above the hotspot　

1m　0.573μSv/h、50㎝　1.130μSv/h、5㎝　2.881μSv/h

Readings 3 meters away from the center of the hotspot

1ⅿ　0.162μSv/h、50ｃｍ　0.156μSv/h、5ｃｍ　0.116μSv/h

Sampling Spot

Sampling spot

5cm

50cm

1m

the spot 3 meters away from the center of the hotspot

5cm

50cm

 1m

Making the sample

range of making the sample

 range of making the sample

 depth of making the sample

Sampling Tools and Scintillation Counter

 The hotspot is left side the entrance of the building called Kawasemi no Sato

Measurement Data

Sampling Spot

Mizumoto Park C block Plum Trees Area (but there are actually no tree nearby) C4

The date of making the sample: 2019/2/24　16：25～17：07

Weather: Sunny day　　The day before making the sample: Sunny day
Address Post code125-0041　Higashikanamachi8-30, Katsushika Ward, Tokyo, Japan

GPS: 35.783493,139.886998

Scintillation Counter Hotspot Finder（30sec average value）
５ｃｍ from the ground　0.114μSv/h
50ｃｍ from the ground　0.117μSv/h
１ｍ　from the ground　　0.115μSv/h

Measurement Data from Fukushima Preservative Service Association of Health　

Germanium Semi-Conductor (SEG-EMS)

Measurement Date:2019/5/21
Measurement Time:　3600sec　Sample Weights 78.9ｇ
Container: U8(100ml)

Cs134　　144Bq/Kg±6.58Bq/Kg

Cs137　1,810Bq/Kg±23.1Bq/Kg

All Cs　 1,954Bq/Kg

77,085Bq/㎡

Sampling Spot 

5cm

50cm

1m

Making the sample

Making the sample

Making the sample

Making the sample

Making the sample

Making the sample

Making the sample

Measurement Data

Sampling Spot

Mizumoto Park A Block Chuo Hiroba (Field) A1 (East Tokyo)

The date of making the sample: 2019/2/17/　13：10～13：42

Weather: Sunny day　　The day before making the sample: Sunny day
Address Post code125-0034　Mizumoto Koen５, Katsushika Ward, Tokyo, Japan

GPS: 35.794188,139.872678

Scintillation Counter Hotspot Finder（30sec average value）
５ｃｍ from the ground　0.074μSv/h
50ｃｍ from the ground　0.070μSv/h
１ｍ　from the ground　　0.072μSv/h

Measurement Data from Fukushima Preservative Service Association of Health　

Germanium Semi-Conductor (SEG-EMS)

Measurement Date:2019/5/21
Measurement Time:　3600sec　Sample Weights 114.5ｇ
Container: U8(100ml)

Cs134　　23.2Bq/Kg±2.58Bq/Kg
Cs137　　341Bq/Kg±8.59Bq/Kg
All Cs    　364.2Bq/Kg

20,850Bq/㎡

Sampling Tools and Scintillation Counter

 Sampling Spot

1m

50cm

5cm

Making the sample

Making the sample

Making the sample

Making the sample

Making the sample

Measurement Data

 Sampling spot