The radiation measurement situation in Yokohama municipal library

 

 

●Measurement contents

 About Yokohama municipal library, we measured γ (gamma) dose of radioactivity of surface of the earth 1cm and 50cm at point that might become Mike Rothe pot in facility. (when we measured numbers more than 0.23μSv/h at surface of the earth 50cm, we measured 1m.)

 [example of measurement point]

  (only when user can go in and out) such as around upper part, gutter of rainwater measure and the outskirts, the lower rain doino, place where fallen leaves gather, drainage of the roof

 

●Publication of result of a measurement

  About ward office and public hall, district center, welfare center for the old, juxtaposition facility with community care plaza, we measured in ward office, Civic Affairs Bureau, Health and Social Welfare Bureau.

  ※ Juxtaposition facility performed the eight spots measurement in the whole facility.

  ※ Please refer to each ward jurisdiction section for inquiry about juxtaposition facility.

 

Library name

 Measurement location

The situation of earth surface

 Measurements

(μSv/h)

 Measurement day

Weather

 Measuring equipment

 1cm

 50cm

1m 

 Chuo-toshokan

 The upper open space accessible to anyone rainwater measure

 Grating

 0.06

0.05

 H24 .2.22

Cloudy weather

A

 Staff side gate driving rain Toishita part

 SAT

 0.07

0.07

 North side green tract of land

 Soil, turf

 0.09

0.07

 Mt. Noge parking lot entrance

 Tile

 0.07

0.06

 South side green tract of land

 SAT

 0.07

0.07

 Tsurumi library

 Front gutter (the left)

 Concrete

 0.06

0.06

 H24 .2.20

Fine weather

A

 Front gutter (the right: the park side)

 Concrete

 0.08

0.07

 The front (plant)

 Soil, fallen leaves, dry grass

 0.06

0.07

 The back side (the park side)

 Tile

 0.07

0.07

 In the second-floor rainwater drain

 Tarpaulin

 0.06

0.06

 Kanagawa library

(welfare center for the old back island Zhuang juxtaposition facility)

 

Jurisdiction section: Kanagawa Ward Regional Promotion Division 

 Facility doorway

 Asphalt

 0.11

0.10

 H24 .3.6

Cloudy weather

B

 Rainwater measure

 Iron

 0.12

0.11

 Gutter (building entrance and exit tax in proportion to the number of people)

 Grating

 0.09

0.10

 Building north side doorway

 Tile

 0.11

0.09

 Building doorway

 Tile

 0.09

0.08

 Rainwater measure

 Grating

 0.09

0.09 

 Building south side doorway

 Tile

 0.10

0.10

 Gutter (facility doorway)

 Grating

 0.11

0.09

 Middle library

(Honmoku district center juxtaposition facility)

 

Jurisdiction section: Naka Ward Regional Promotion Division 

 Planting obi in front of the front entrance

 SAT

 0.07

0.06

 H24 .2.10

Fine weather

B

 District center bicycle parking lots (the front)

 SAT

 0.09

0.08

 District center gutter (the front)

 Grating

 0.12

0.08

 Olive studio rainwater measure (the kitchen side)

 Iron

 0.06

0.07

 Olive studio flower bed

 Fallen leaves

 0.07

0.07

 Library bicycle parking lots (the backside)

 SAT

 0.11

0.07 

 Parking lot (the backside)

 SAT

 0.11

0.09

 Shrubbery

 Fallen leaves

 0.09

0.07

 South library

 North side shrubbery

 Grass and soil

 0.08

0.07

 H24 .2.20

Fine weather

A

 The neighborhood of gutter

 Concrete

 0.07

0.07

 The neighborhood of entrance side bench

 Tile

 0.06

0.07

 Bicycle parking lots

 Brick

 0.09

0.07

 West passage

 Concrete

 0.07

0.06

 Konan library

 Parking lot gutter (the depths)

 Concrete

 0.12

0.07

 H24 .2.22

Cloudy weather

A

 Parking lot gutter (the right entrance)

 Concrete

 0.09

0.08

 Parking lot gutter (the left entrance)

 Concrete

 0.08

0.06

 Bicycle parking entrance

 Concrete

 0.08

0.06

 Courtyard (northwest corner)

 On fallen leaves

 0.07

0.07

 Hodogaya library

(Hodogaya public hall juxtaposition facility)

 

Jurisdiction section: Hodogaya Ward area collaboration section 

 Stairs bottom groove

 Grating

 0.09

0.09

 H24 .2.24

Cloudy weather

 In front of waste disposal treatment warehouse

 Concrete

 0.08

0.07

 South side entrance gutter

 Grating

 0.06

0.07

 Outlet port along western track

 Grating

 0.07

0.07

 North side gutter

 Grating

 0.07

0.06

 Plant the north side; wide gutter

 Grating

 0.08

0.08 

 East side shrubbery

 SAT

 0.07

0.07

 East side drainage tax in proportion to the number of people

 Concrete

 0.10

0.09

 Asahi library

 The neighborhood of front yard bush

 SAT

 0.06

0.06

 H24 .2.22

Fine weather

A

 The neighborhood of groove having U-shaped building southwest side

 Grating

 0.05

0.07

 Building northwest gutter neighborhood

 Iron plate lid

 0.07

0.07

 Site northeast side bush

 SAT

 0.09

0.07

 Site north side stairs lower rainwater measure neighborhood

 Concrete

 0.06

0.04

 Isogo library

(Isogo Ward synthesis Government building)

 

Jurisdiction section: Isogo Ward General Affairs Division 

 Industrial road side entrance gutter

 Brick

 0.11

0.12

 H24 .3.7

Cloudy weather

A

 Mechanical parking lot exit gutter

 Grating

 0.07

0.08

 National highway side bicycle parking lots entrance gutter

 Grating

 0.08

0.08

 National highway side entrance gutter

 Grating

 0.10

0.08

 Parking lot doorway gutter

 Grating

 0.05

0.06

 Industrial road side bicycle parking lots gutter 1

 Brick

 0.08

0.07

 Industrial road side bicycle parking lots gutter 2

 Brick

 0.08

0.07

 Isogo library front yard rainwater measure

 Tile

 0.08

0.06

 Kanazawa library

(Kanazawa district center juxtaposition facility)

 

Jurisdiction section: Kanazawa Ward Regional Promotion Division 

 Parking lot entrance rainwater measure

 Grating

 0.10

0.09

 H24 .2.16

Cloudy weather

C

 Grand depths rainwater measure

 Concrete, sand

 0.07

0.08

 The grand storeroom side

 Soil, dead leaf

 0.09

0.07

 Grand doorway

 Mat, dead leaf

 0.10

0.09

 Courtyard rainwater measure

 Grating

 0.12 

0.10

 Courtyard bench driving rain liquid measure

 Grating

 0.13

0.10 

 Bicycle parking lots tree

 Grating

 0.07

0.09

 Parking lot rainwater measure

 Grating

 0.08

0.09

 Kohoku library

(Kikuna district center juxtaposition facility)

 

Jurisdiction section: Kohoku Ward Regional Promotion Division 

 The outer periphery

 Asphalt

 0.09

0.08

 H24 .2.14

Cloudy weather

B

 The rainwater measure outskirts

 Sand

 0.12

0.08

 Shrubbery

 SAT

 0.10

0.07

 Shrubbery

 SAT

 0.07

0.08

 Flower bed

 SAT

 0.09

0.06

 Shrubbery

 SAT

 0.09

0.08 

 Bicycle parking lots neighborhood

 SAT

 0.12

0.09

 The neighborhood of parking lot

 SAT

 0.10

0.08

 Green library

(Tokaichiba community care plaza juxtaposition facility)

 

Jurisdiction section: Midori Ward Health and Welfare Division 

 Shrubbery

 Fallen leaves

 0.09

0.09

 H24 .3.16

Fine weather

B

 Gutter (facility doorway)

 Grating

 0.10

0.10

 Gutter (facility doorway)

 Grating

 0.08

0.09

 Rainwater measure

 Grating

 0.06

0.06

 Gutter (facility doorway)

 Grating

 0.09

0.10

 Shrubbery

 SAT

 0.08

0.08 

 Shrubbery

 SAT

 0.08

0.07

 Gutter (parking lot doorway)

 Grating

 0.06

0.08

 Yamauchi library

(Yamauchi district center juxtaposition facility)

 

Jurisdiction section: Aoba Ward Regional Promotion Division 

 The neighborhood of parking lot

 Asphalt

 0.10

0.08

 H24 .2.15

Cloudy weather

B

 The neighborhood of parking lot

 Asphalt

 0.08

0.06

 The outer periphery

 Brick

 0.06

0.08

 Gutter

 Grating

 0.09

0.06

 Bicycle parking lots

 Sand

 0.15

0.08

 The outer periphery

 Block

 0.07

0.08 

 Library entrance

 Block

 0.08

0.06

 The neighborhood of library entrance

 Asphalt

 0.09

0.07

 Tsuzuki library

(Tsuzuki Ward   synthesis Government building)

 

Jurisdiction section: Tsuzuki Ward   General Affairs Division 

 Parking outside

 There is sedimentation of mud below

 0.07

0.07

H24 .2.9

Fine weather

A

 Government building back garden plant

 Iron manhole

 0.08

0.09

 Parking lot 1

 There is sedimentation of mud below

 0.07

0.07

 Parking lot 2 (rainwater measure)

 There is sedimentation of mud below

 0.09

0.07

 Parking lot 3

 There is sedimentation of mud below

 0.07

0.08

 Courtyard

 Slate

 0.14

0.12 

 Library side 1

 There is sedimentation of dead leaf, sludge

 0.14

0.13

 Library side 2

 There is sedimentation of mud below

 0.06

0.07

 The front entrance

 Slate

 0.11

0.10

 0.10 

 Totsuka library

(Totsuka district center juxtaposition facility)

 

Jurisdiction section: Totsuka Ward Regional Promotion Division 

 Rainwater measure in front of entrance

 Grating

 0.11

0.11

 H24 .2.15

Cloudy weather

C

 Northeast side parking lot earth surface

 Concrete

 0.12

0.10

 Northeast side parking lot rainwater measure

 Grating

 0.07

0.07

 Southeast side rainwater measure

 Grating

 0.08

0.08

 Northwest side earth surface

 Concrete

 0.10

0.10

 In front of industrial waste storage area

 Grating

 0.12

0.10 

 Parking lot entrance

 Grating

 0.08

0.08

 Bicycle parking lots shrubbery

 SAT

 0.12

0.11

 Sakae library

 Courtyard shrubbery

 Soil, fallen leaves

 0.09

0.07

 H24 .2.22

Cloudy weather

A

 Library entrance right hand Takagi bottom

 Soil, grating

 0.07

0.06

 Library entrance left hand shrubbery

 Soil, fallen leaves

 0.11

0.10

 Parking lot side eaves trough bottom

 Concrete

 0.07

0.06

 Rooftop garden eaves trough bottom

 Pavement

 0.08

0.05

 Spring library

 Vertical plank gutter rainwater measure with parking lot

 Grating

 0.05

0.06

 H24 .2.20

Fine weather

A

 The northeast planting ground

 Lawn

 0.06

0.06

 Southeast gutter rainwater measure

 Grating

 0.12

0.10

 Southwest rainwater measure

 Grating

 0.07

0.07

 Courtyard

 Fallen leaves

 0.08

0.07

 Seya library

 The bicycle parking lots rainwater measure outskirts

 Concrete

 0.10

0.07

 H24 .2.20

Fine weather

A

 Office side flower bed

 SAT

 0.07

0.07

 The parking lot rainwater measure outskirts

 Concrete

 0.09

0.08

 The parking lot drainage outskirts

 Concrete

 0.05

0.06

 The parking lot hedge drainage outskirts

 Concrete

 0.05

0.05

 

   [measuring instrument]

    (A) Mr.Gamma A2700 type (product made in clear pulse company)

       Detector Csl(TI) scintillation detector

    (B) NHC7 (FUJI ELECTRIC Co., Ltd.)

       Detector Nal(TI) scintillation detector

    (C) Model type 3 (Orient medikku)

       Detector Nal(TI) scintillation detector

 

●About "indication" of correspondence of radiation result of a measurement in Yokohama-shi

 Higher surface of the earth

 Yokohama-shi

 1m

We cope using 0.23μSv/h or more as an indication

 (50cm)

(we cope using 0.23μSv/h or more as an indication)

(when it is more than 0.23μSv/h, we measure even 1m)

 1cm

We cope using 0.59μSv/h or more as an indication

 

 

 

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