蕊O4･

ISSN
NIRS･RSRADIOACTIVSURVEY

D

NUM
Sep.

RadioactivitySurveyD
inJapanNumber70
September1984
Contents

EnvironmentalMaterials‥‥........‥.‥.‥.....‥.‥‥‥‥‥‥‥〃∂卵〝甜e仰正∂/月〝∂小豆ご錯f叫
1.CoIIectionandpretreatmentofsampIes……………………‥･2.Preparationofsamplesforanalysis‥･‥････････‥‥‥‥‥‥･･･‥…:…:器二慧i:ニミ;r芸:ごニー崇｡:まヱe…慧こごミニ5.Countlng.‥.‥‥‥‥‥‥･‥･‥･‥‥‥‥‥･‥‥‥‥‥‥‥‥
6･Results…･.‥‥‥‥･….……‥…‥…‥‥‥‥‥‥‥‥…

(1)‑1Strontlum‑90andCeslum‑137inRainanddrYfa"out‥･････‥‥(fordomestic program)‑2

Strontium‑90and(forWHO
(2)
(3)
(4)
(5)
(6)
(7)

Cesium‑137in

Rainanddryfa"out･･･‥‥･‥･

Program)

Strontium‑90andCesium‑137inAirbornedust…………‥･

Strontium‑90andCesium‑137inServicewater…………‥･
Strontium‑90andCesium‑137in

Freshwater‥･････‥‥‥‥‥

Strontium‑90andCesium‑137inSoiI‥･･‥･‥‥･･‥‥････‥
Strontium‑90andCesium‑137inSeawatar･‥‥‥･‥････‥‥
Strontium‑90andCesium‑137inSeaseadiments･‥‥･･‥･‥･･

EnvironmentalandDietaryMaterials*(5)Seawater
Seawaterwascollect(〃叩∂〟甜β爪血/月〝∂恒血ど即J叫

thepretreatmentofsampJes

WaSalsogNentOWeatherc

effect of terrestriaL fr

expectedtobenegligiblysI
1.CoHectionand(1)Rainand
Rain

and

dryfalIout

carried out

dryfaJLoutwas

there

when

wa:

davs.To

prevent

sampIingtray,aPPrOXimately5000cm2inarea.which

coIIected

atthebowofasz

WaSf‖edwithwatertoadepthoflcmatthebeglnnIng

StOOd

st川byscooplngSurl

Ofeverymonth.

lene

bucket.lmmediatelya

co‖ected monthlyona

Thesamplewasfilteredafterstrontiumandcesium
were

Carriers

distil[edwaterofadded.Thetraywaswashedwith5A
the washing

and

was

tothe

combined

filtrate.
The

pleswereacidifiedtoapHhydrochloricacid
centrated
sea

then

water,andstoreltainers.ThesampIingequIF
wassampJethroughpassedacationex‑

ChangeofDowex50WX8,50〜100
column(500mA
rate
of80mA/min.
mesh.Naform)ata(2)Airborne
Airborne

thoroughly

were

and

then

with

w

rinseddist川ed

wal

wa:
water
m川iliters of sea
Stations for the determinal

dust

dust wasbycollected

anelectrostatic(6)Seasediments
Sediment

PreCIP[tatOrOrafiIterairsamplerforeverythreemonths

fortheatarateofmorethan3000m3permonth･Thesamp,ing
doneltol.5metersabovethe

WaS

contamireach,WaSco]Ieclinto account:

ground.

(3)Servicewaterandfreshwater
Service water.100A

wasseawatersample.

COIlected ata.The

depth ofwab.No

slgnificant
thel

Observedinanintakeofthewater‑treatmentPIantandatthetapafter

C.Mud,Silt

WaterWaSleftrunnlngforfiveminutes.Water,tOWhich

A conventionalsediments

COIJectlngthetopfewcent
Approximately4kg
of theSubsequentprocesswasthesameasthatdescribedin

SPreadonalargeporcelair

thesection(1).Freshwaterwastreatedinthesameway

oven

as

and

fin

aftersampIlng,WaSVIgOrOuSlystirredandfiltered.The

addedcarriers of strontiumandcesiumimmediately

atlO5tollOOC

tothe service water.

(7)Totaldiet
伸andAfullonedayordinar

Soit
Soilwascollectedfromthelocationinthespacious

Water.tea

flat area

WaSCOIIectedasasampJe(

without

past

disturbanceonthe

surfaceand otherin‑bet

(12)Fish.shellfishand(9)Milk

a.Sea fish and frl
Fishwasrinsedwil

RawmilkwascoIlectedinproduc‑ngdistrictsandcommerciaImilkwaspurchasedinconsumIngdistricts･ora
Milkin a stainIess steelpan
porcelain dishwas
evaporatedto

drynessfoIIowed

bycarbonization

PaPer.OnlytheediblelandSizedfish.andthewholeashing.

OneS.Eachsamplewas
lesssteelpanoraporci(10)Vegetables

SamP]ewasashedinalb.Shellfish

SpinachandJapaneseradishwereselectedasthe

Approximately4kl

representativesforleafvegetablesandfornon‑StarCh

WaSCOIIectedorpurcha!
wastreatedin the sam

roots.respectively･Afterremov‑ngSOil･theediblepartof
vegetablesamplewasdriedandcarbonizedinastain‑
lessateelpanoraporceIaindish･c.Seaweeds
Edible seaweedsI=りTea

watertoremovesandal
surface.These weredried and ashed.

Fivehundredgramsofmanufacturedgreenteawas
collected.carbonizedandashedinastainlesssteelpan

rer

OraPOrCelaindish･
Tablelshows

TablelD紬ilsoI細叫帥=血l￠Ction
FrequencYOfsampling

Sample=Environmentalmaterials=(1)RainanddrYfallout
lfordomesticprogram
2

forWHOprogrammonthlY
monthly(2)Airbornedust

quarterlY(3)ServicewaterandfreshwaterlServicewater(soursewater)

semiYearlY(JuneandDecember)2

Servicewater(tapwater)

semiYearlY(JuneandDecember)

3

Freshwater

YearlY(fishingseason)

l

O〜5cm

YearlY(JuneorJulY)2

5〜20cmYearly(JuneorJulY)(4)Soil(5)Seawater

YearlY(JulYOrAugust)(6)Seasediments

YearlY(JulYOrAugust)=DietarYmaterials=(7)Totaldiet

semiYearlY(June′NovemberordeSample3

FrequencYOfsampling

consumingdistricts

4

powderedmilk(10)Vegetables

semiYearlY(FebruarYandAugust)semiYearlY(AprilandOctober)I

producingdistricts

yearlY(hervestingseason)

2

consumingdistricts

Yearly(harvestingseason)(11)Tea

yearlY(thefirstharvestingseason)(12)Fish,Shellfish,andseaweeds
I
Sea fishfishYearly(fishingseason)

2

Freshwater3

Shellfish

yearly(fishingseason)

4

Seaweeds

YearlY(fishingseason)

yearlY(fishingseason)

2.Preparationofsamplesforana]ysIS

fiJtered and washed.The(1)Rain.servicewaterandfreshwater

COmbinedforsubsequentr

Strontiumand cesium wereelutedwithhydroch一
暮oricacidfromthecationexchangecolumn.Theresidue(5)Airbornedust.diet.mlfish.seaweeds.tea.
Theseashedsamples

OfrainsampleonthefilterpaperwasashedinanelectricmufflefurnaceandtheashwasdissoIvedinhydrochlbric
acid.Theinsoluble
partwasfilteredandwashed･The
filtrateandthewashingswerecombinedtotheprevious

PrOCedureasthatdescribe

eluate andusedforradiochemicalanaJys(S.

3.Separation

ofstrontiL(1)Strontium‑90
Sample(2)SoilThe

Air‑driedsoiJwaspassedthrougha20meshsieve･
washeated.in
the presencesieved sampleso]utions.pr

SeCtions2‑(1)through21of

StrOntium and cesium carriers.together with sodiumhydroxide･Thesamplewasthenheatedwithhydroch‑SOdium hydroxide.Afters(
theprecipitateofstrontium
supernatar

SeParated.The

loricacidandtheinsolubIepartwasfilteredandwashed･

cesium‑137

determination

Thecombinedsolutionofthefi[trateandwashingswas

SO[vedinhydrochloric aci【usedforradiochemicalanalysIS.

WerePreCIPltatedasoxala
soIvedin nitricacid and sI
by successive fun
Calcium(3)Seasedments
Afterremovalofpebbles.shellsandotherforelgn

lron scavenge

matters.thesedimentsamplewasdriedinahot‑airoven

Carrier fo"owedandgroundfinelywithamortar･ThesampIewaspassed

additionwasmadeby bariurTof barium carrierl

Whilestirnngthesolution.cesium

was

on

adsorbed

4.

molybdophosphate.
Afterfilteredoffandwashedwithdilutenit(icacid.

A weighed amoun
treated underheatlngVI

theprecIPltateWaSdissoIvedin2.5Nsodiumhydroxide
wasremovedof

POtaSSiumammonium

solution.Ammonia

Determination

WithhydrochIoricacidf(

completelyfromthe

Of ashed

samples

withhydrochIoricacidanda"owedtocool･MoIybdenumhydroxidewhichcameoutinthesolution･WaSfilteredoff

she=fishorandwashedwithwater.lnsuchcircumstancethatcon‑
byrubidium‑87wasnotnegligibleforthe
taminationnecessary.Theextractlhydr
VOlumewithdiIutemeasurementofcesium‑137.thefo"wlng10n‑eXChange

tionwasanalyzedforc;

procedurewasapplied･Afixedamountofferricchloride

POtaSSiumpermanganalsoIutionwasaddedtothesolutiondissoIvedwith2.5N

cium

sodiumhydroxide･Ammoniaandmolybdenumhydroxide
wereremovedasdescribedabove.EthyIenediaminete‑
traaceticacidtetrasodiumsaltwasaddedtothefiltrateappliedwhenappropnal
determinedJ
sium weresoIutionbyboiling.ThesolutionwasadjustedtopH8･2

acid

or

as

emission

oftovseeweeds

nitric acid.hydr

oxalate.Atomi

spectrometry.

andwashings.Cesiumandrubidiumwereadsorbedona
5.Countlng
After the radioche

cationexchangeresin･Cesiumwasseparatedfromrubi‑
diumbyeIutlngWithhydrochIoricacid･To
removlng

this eluate

mOlybdenum

orthe

fiJtrate andwashingsafterhydroxide.chIoroplatinicacid

PreCipitates

were

counl

groundbetacountersnl
rateS

Were

solutionwasaddedtoprecipltateCeSium.TheprecIPl‑tatewasfiIteredontoataredpaperinademountable

COuntJng

filter and washedthen ethano].
withwaterandAfterfixingthefilterpaperonataredplanchetteandof strontium‑90anddryingit.thechemicalyieIdofcesiumwasdeterminedby

nuclidesinthe

weighingtheprecipitatewiththepIanchette･Radioactiv‑
ityfromcesium‑137wasmeasuredforthisprecipltate･CO

recovery.self‑absorpt10r
ce!

Ple aliquot.Fromthe
orlglnalr

6.R￠Sults(1)‑1Strontium‑90andCesium‑137jnRainanddrYfa"out(fordomesticprogram)(I川mJun.1984toDec.用糾)‑CO∫コ血ued方･Om〃b.680J血5pUム〟co〟oJつ‑

Table(1)‑1:Strontium‑90andCesium‑137RainanddrYfa"out
Location

Duration

Precipitation

90sr(days)(mm)(mCi/km2)‡une′1984
0nagawa‑maChi′MIYAGI

31

0.006士0.0008

Shizuoka,SHIZUOKA

32

0.004±0.0008

Matsue,SHIMANE

31

0.002±0.0006

JulY′1984
3 l

44.5

0.002±0.0006

Aomori,AOMORI
Onagawa‑maChi,MIYAGI

3 1

98.4

0.012±0.0010

3 2

129.7

0.004±0.0007

Mit0.IBARAGI

3 1

90.5

0.004±0.0007

Shinjuku,TOKYO

3 1

81.8

0.001±0.0006

Yokohama,KANAGAWA

3 2

109.7

0.001±0.0006

Fukui,FUKUI

31

169.7

0.003士0.0007

Shizuoka,SHIZUOKA

3 1

52.0

0.004±0.0007

KYOtO′KYOTO

3 (∠

126.6

0.004士0.0007

WakaYama,WAKAYAMA

31

178.8

0.005士0.0008

Tottori,TOTTORI

3 0

111.1

0.006±0.0008

Matsue′SHIMANE

3 (∠

77.8

0.002±0.0006

Hiroshima,HIROSHIMA

3 l

71.7

0.008±0.0009

Matsuyama,EHIME
Dazaifu,FUKUOKA

3 l

78.5

0.004士0.0007

3 1

52.7

0.009±0.0016

Saga,SAGA

3

35.8

0.004±0.0008

Nagasaki,NAGASAKI

3 l

64.0

0.001±0.0006

Yonagusuku‑mura,OKINAWA

3 1

99.0

0.000±0.0008(ノlSapporo,HOKKAIDO

August,1984

Sapporo′HOKKAIDO

3 l

39 0

0.005±0.0007

Aomori,AOMORI

3 (∠

4 1 9

0.013±0.0010

Onagawa‑maChi.MIYAGI

3 (∠

(∠

0.008±0.0008

Yamagata,YAMAGATA

3 (∠

7 7

0.004±0.0007

00kuma‑maChi.FUKUSHIMA

32

3 1 0

0.002±0.0006

3 0Precipitation

Location

90sr

(mm)

(mCi/kMatsue,SHIMANE

3 (∠

37.2

0.004±0.0

Hiroshima,HIROSHIMA

3 つム

50.8

0.013±0.0

Matsuyama,EHIME

3 l

55.5

0.001±0.0

Dazaifu′FUKUOKA

3 (∠

187.3

0.003±0.0

Saga,SAGA

33

227.5

0.001±0.0

Nagasaki,NAGASAKI

3 (∠

245.0

0.001±0.0

Yonagusuku‑mura,OKINAWA

35

369.5

0.003±0.00.002±0.0

September,1984
Sapporo′HOKKAIDO

32

54.0

Aomori,AOMORI

3 1

112.9

0.008±0.0

Onagawa‑maChi,MIYAGI

30

200.9

0.006±0.0

Yamagata,YAMAGATA

3 1

174.0

0.005±0.000kuma‑maChi,FUKUSHIMA

33

79.3

0.001±0.0

Mit0.IBARAGI

3 l

(∠9

0

0.000±0.0

Shinjuku,TOKYO

3 1

6 0 8

0.005±0.0

Yokohama,KANAGAWA

30

69 0

0.001±0.0

Fukui,FUKUI

3 つム

63 1

0.002±0.0

Shizuoka,SHIZUOKA

29

8 6 5

0.002±0.0

NagoYa,AICHI

31

82.0

0.002±0.0

Kyoto′KYOTO

32

99.2

0.001±0.0

Kobe,HYOGO

30

111.7

0.005±0.0

WakaYama,WAKAYAMA

28

66.1

0.001±0.0

Tottori,TOTTORI

(∠9

103.5

0.005±0.0

Matsue.SHIMANE

3 (∠

89.8

0.004±0.0

Hiroshima,HIROSHIMA

3 l

117.7

0.004±0.0

MatsuYamalEHIME

3 つム

67.0

0.001±0.0

Dazaifu,FUKUOKA

3 1

163.2

0.002±0.0

Saga,SAGA

30

70.9

0.001±0.0

Nagasaki,NAGASAKI

3 1

130.0

0.001±0.0

Yonagusuku‑mura,OKINAWA

28

86.5

0.001±0.0

October,1984
Sapporo,HOKKAIDO

3 (∠

76.5

0.001±0.0

Aomori,AOMORI

3 つム

102.0

0.008±0.0

Onaqawa‑maChi,MIYAGI

33

136.5

0.008±0.0

Precipitation
Location

(mm)

90sr
(mCi/km2)

WakaYama,WAKAYAMA

3 4

0.002±0.0007

Tottori′TOTTORI

32

0.005±0.0008

Matsue,SHIMANE

3 10.001±0.0006

Hiroshima,HIROSHIMA

32

0.004±0.0007

MatsuYama,EHIME

3 (∠0.000±0.0005

Dazaifu′FUKUOKA

3 (∠0.000±0.0008

Saga,SAGA

3 l

0.001±0.0007

Nagasaki,NAGASAKI

3 つム

0.002±0.0007

Yonagusuku‑mura,OKINAWA

3 1

0.000±0.0006

Aomori,AOMORI
Onagawa‑maChi,MIYAGIYamagatalYAMAGATA

0.001±0.0006

3031313131

Novenber,1984
Sapporo,HOKKAIDO

0.006±0.0008
0.007±0.0008
0.001±0.0006
0.001±0.0006

00kuma‑maChi,FUKUSHIMA

ShinjukulTOKYO
Yokohama,KANAGAWA
Fukui,FUKUI

0.001±0.0006
3131323131

Mito,IBARAGI

0.004±0.0007
0.002±0.0006
0.001±0.0006
0.002±0.0007

Shizuoka,SHIZUOKA

Kyoto′KYOTO
Kobe,HYOGOWakaYama,WAKAYAMA

0.001±0.0006
3130313431

NagoYa,AICHI

0.001±0.0006
0.001±0.000e
O.000±0.0005
0.003±0.000フ

Tottori,TOTTORI

Hiroshima′HIROSHIMA
MatsuYama,EHIME

Dazaifu,FUKUOKA

0.003±0.000フ
3131303129

Matsue′SHIMANE

0.003±0.000〔
0.001±0.000(
0.001±0.000(
0.001±0.000(

Saga,SAGA
Nagasaki,NAGASAKI

3134

0.002±0.000(
0.001±0.000つ

Yonagusuku‑mura,OKINAWA
December,1984

Sapporo′HOKKAIDO

28

0.001±0.000(

Aomori,AOMORI

3 (U0.005±0.000コ

OnacJaWa‑maChi.MIYAGI(∠

0.005±0.000コ

8

90sr

Precipitation

Location(mm)(mCi/km2

WakaYama,WAKAYAMA

36

40.1

0.002±0.00

Tottori,TOTTORI

3 61035.50.006±0.00

Matsue,SHIMANE

3 1

159.3

0.003±0.00

Hiroshima′HIROSHIMA

3 8

25.7

0.004±0.00

MatsuYama,EHIME

(∠9

34.0

0.001±0.00

Dazaifu,FUKUOKA

3 5

88.1

0.001±0.00

Saga,SAGA

36

70.4

0.001±0.00

Nagasaki,NAGASAKI

35

57.5

0.001±0.00

Yonagusuku‑mura,OKINAWA

36

73.0

0.000±0.00

1400

Figure(1)‑1SamplingLocationsofRainanddrYfallout(壬ordomesticprogram)
1.Sappor0
2.Aomori

12.町血

3.On叩aWa‑maChi

川.Wak叩ama

4.Yamagata
5.00kllma‑maChi

15.Tottori
16.
Matsue6.

lT.Hiroshima
川.Matsuyama

Mito

T.Shinjuku

13.Kobe8.Yokohama

19.Dazaitu

9.Fukui

20.SagalO.Shizuoka

21.川agasaki

ll.Mag叩a22.Yonagusuku‑mura

1350

SEA

OFJAPAN汐9

(1)‑2 Strontium‑90andCesium‑137inRainanddrYfallout(forWHOprogram)(fromJuJ.1984toJan.1985)‑COJ班刀Ued育0皿〃b.680/血5puムムcロ#0月‑

Table(1)‑2:Strontium‑90andCesium‑137RainanddrYfallout
L｡Cati｡nJuly′1984
Niigata/NIIGATA

Dご芸n Pre;Stion(m認m2)

3 1

230.9

0.003±0.0007

Kanazawa,ISHIKAWA

30

225.0

0.002±0.0006

Nagano,NAGAN0

3 1

231.1

0.002±0.0006

0saka/OSAKA

3 1

140.1

0.004±0.0007

OkaYama,OKAYAMA

3 1

47.1

0.000±0.0005

Yamaguchi,YAMAGUCHI
Kochi′KOCHI

3 l

127.5

0.001±0.0006

3 つム

217.9

0.007±0.0008

Kagoshima,KAGOSHIMA

3 1

87.5

0.000±0.0005

Akita,AKITA

3 (∠

95.3

0.001±0.0006

Niigata,NIIGATA

3 2

31.2

0.003±0.0007

Chiba′CHIBA

3 1

3.5

0.000±0.0005

Kanazawa,ISHIKAWA

3 (∠

99.0

0.004±0.0007

Nagano′NAGAN0

3 (∠

16.4

0.002±0.0006

0saka,OSAKA

3 (∠

44.3

0.004±0.0007

OkaYama,OKAYAMA

3 (∠

51.0

0.003±0.0006

Yamaguchi′YAMAGUCHI

3 2

123.5

0.004±0.0007

Kochi,KOCHI

3 つム

330.1

0.004±0.0007

Kagoshima,KAGOSHIMA

3 (∠

332.5

0.004±0.0009

Akita,AKITA

3 l

184.8

0.002±0.0007

Niigata′NIIGATA
Chiba,CHIBA

3 l

188.0

0.003±0.0006

3 つム

67.7

0.002±0.0007

Kanazawa,ISHIKAWA
Nagano,NAGAN0

3O

122.5

0.005±0.0007

3 1

100.6

0.002±0.0006

0saka,OSAKA

3 l

105.2

0.002±0.0007

OkaYama,OKAYAMA

3 l

85.6

0.004±0.0007

YamaguchilYAMAGUCHI

3 l

113.0

0.003±0.0006

Kochi,KOCHI

3 1

89.9

0.004±0.0007

August,1984

September,1984

Location

Duration(daYS)
Kochi,KOCHI
Kagoshima,KAGOSHIMA

Precipitation

90sr

(mm)

(mCi/km130.9

0.003±0.0

29.0

0.002±0.0

Novenber,1984
Akita,AKITA

3l

130.9

0.002±0.0

Niigata,NIIGATA
Chiba,CHIBA

31

92.3

0.002±0.0

33

65.2

0.000±0.0

Kanazawa,ISHIKAWA

31

204.0

0.002±0.0

Nagan0.NAGAN0

31

41.0

0.002±0.0

0saka,OSAKA

3 l

27.3

0.001±0.0

OkaYama,OKAYAMA

3 1

31.9

0.000±0.0

Yamaguchi′YAMAGUCHI

3 0

63.5

0.001±0.0

Kochi,KOCHI

3 1

108.7

0.004±0.0

Kagoshima,KAGOSHIMA

30

27.0

0.002±0.0

December,1984
Akita,AKITA

3 5

103.8

0.002±0.0

Niigata,NIIGATA
Chiba,CHIBA

3 5

239.3

0.003±0.0

33

68.6

0.000±0.0

Kanazawa,ISHIKAWA

29

294.0

0.003±0.0

Nagano,NAGAN0

35

43.9

0.002±0.0

0saka,OSAKA
OkaYama,OKAYAMA

35

55.0

0.003±0.0

36

43.6

0.001±0.0

Yamaguchi,YAMAGUCHI

32

106.0

0.002±0.0

Kochi,KOCHI

36

89.0

0.003±0.0

Kagoshima,KAGOSHIMA

39

58.0

0.007±0.0299.70.001±0.0

JanuarY′1985
Chiba,CHIBA

1400

Figure(1)‑2SamplingLocationsofRainanddrYfallout(forWHOprogram)
1.Akita

2.M軸ata
3.Chiba
4.Kana王aWa
5.Hagan0
6.Osaka
T.OkaYama
8.Yamaguchi
9.KochilO.Kagoshima

SEA

OFJAPANク

PACIFICOCEAN

(2)Strontium‑90andCesium‑137inAirbornedust(tromApr.1984toSep.1984)‑CO月血ued万om肋.680/血5pUム〟co〟oJつ一

TabJe(2):Strontium‑90andCesium‑137inAirbornedu
Location

Sampling

90sr

Absorption

Period(10

3pci/v01ume(m3)4〜612′6770.02±0.

00kuma‑maChi,FUKUSHIMA

7

9

10.6420.0±0.

Mito,IBARAGI

7J

912′2460.0±0.

Nigata,NIGAYA

7

9

14′0690.03±0.

Fukui′FUKUI

7920′6430.0±0.

Hamaoka‑maChi,SHIZUOKA

7

911′7230.0±0.

NagoYa,AICHI

7

9

9′904

0.0

±0.

Kyot0.KYOT07912′0300saka,OSAKA

7

April〜June,1984
Mito,IBARAGI
July〜September,1984〜〜

Kobe,HYOGO

7

Tottori,TOTTORI

7

Hiroshima,HIROSHIMA

7

Nagasaki,NAGASAKI

7

〜

〜

〜

〜

〜

〜

〜

〜

〜

〜

9

9
9

8′289
10′1408′5080.03±0.
0.0

±0.

0.0

±0.

0.05±0.

910.5380.02±0.

913′6700.01±0.

Figure(2)SamplingLocationsofAirbornedust

l.00kuma‑maChi

丁.K†Ot02.Mit0

8.0$aka

3.Hii脚ta

9.Kob￠

ヰ.Fukui

10.Tottori

5.Hamaob‑maChi

ll.Hiro$bima

6.H叩○岬

12.Nagasaki

1400

SEA

OFJAPANPACIFIC

OCEAN

(3)Strontium‑90andCesium‑137inSerYicewater(tromJun.1984toDec.1984)‑CO′】血ued存0皿〃b.6∂0/血5pUムムcoむ0月‑

Table(3):Strontium‑90andLocation

Cesium‑137inServicewat

pH(SourceWater)
August,1984
Kyoto′KYOTO

7.7

0.18±0.007

8.9

0.02±0.003

December,1984
Tsukui‑maChi,KANAGAWA
Inuyama,AICHI

0.07±0.005

Moriguchi,OSAKA

0.16±0.007(TapWater)June′1984
Matsue,SHIMANE

0.22±0.007

July′1984
Sendai′MIYAGI

0.06±0.005

August,1984
Fukushima,HUKUSHIMA

0.15±0.007

KyotoIKYOT00.17±0.007

0ctober,1984
Sendai,MIYAGI

7.7

0.09±0.005

7.0

0.01±0.003

Yamagata,YAMAGATA
Mito′IBARAGI

70.07±0.005

Kanazawa,ISHIKAWA

7

0.13±0.006

Nagano,NAGANO

70.04±0.004

NagoYa,AICHI

50.12±0.006

Osaka,OSAKA

6

November,1984

FukuilFUKUIDecember,1984

18017

7

.8

0.04±0.005

0.14±0.007

Figure(3)SamplingLocationsofServiceWater

1.Sendai川.ln叩ama

2.Yamagata

ll.Kyoto

3.Fukushima

12.Osaka

4.Mit0
5.T$ukui‑maChi

13.Moriguchi

6.Kanazawa

15.Tottori

T.Fukui

16.Matsue

8.和昭anO

17.Kochi9.Mag叩a18.Saga

1400

14.Kob￠SEA

OFJAPANPACIFIC

OCEAN

(4)Strontium‑90andCesium‑137inFreshwater(fromJul.1984toDec.1984)‑COノー血ued存○皿〃b.6∂oJ抜上5pUムムcロむ○刀‑

Table(4):Strontium‑90andCesium‑137Freshwater
LocationpH(Freshwater)
July′1984
Ishikari‑maChi,HOKKAIDOA

0.14±0.008

Akita,AKITA

0.10±0.006

Fukushima,FUKUSHIMA

0.04±0.004

Mikata‑maChi,FUKUI

0.15±0.009Niigata,NIIGATA

0.19±0.008

Shobara,HIROSHIMA

0.07±0.005Suwa‑1ake,NAGANO

0.05±0.005Uji′KYOTO

0.001±0.002

September,1984

November,1984

December′1984

1400

Figure(4)SamplingLocationsofFreshwater
l.Ishikari‑maChi
2.Akita
3.Fukushima
4.Nii脚ta
5.Mikata‑maChi
6.Suwa‑Lake
T.U王i
8.SYObaraSEA

OFJAPANク

PACIFIC

OCEAN

(引

Strontium‑90andCosium‑13TinSoil(tromJun.1984toDoc.198叫一CO∫】血ued舟0皿〃b.6∂oJ仏由puムムco打oJコー

Table(5):Strontium‑90and6esium‑137inSoil
Sampling
Location

Depth(cm)(pCi/kg)(mCi/km2)

0〜5

26±

3.6

2.0±0.28

5〜20

36±

4.0

4.4±0.49

0〜5

59±
9±

5.3

2.1±0.19

5〜20

2.9

1

0〜5

27±

3.7

1.5士0.21

5〜20

12±

3.1

2.4±0.61
10±0.5
31±1.2

June.1984
TsuYama,OKAYAMA

July.1984
Aomori,AOMORI

Katsushika,TOKYO

Kashiwazaki,NIIGATA

Kanazawa,ISHIKAWA

Kumatori‑maChi,OSAKA

Kobe,HYOGO

Kokufu‑maChi,TOTTORI

00ta,SHIMANE

Hiroshima,HIROSHIMA

Kochi,KOCHI

0〜5

130士

7

5〜20

200±

8

0〜5
5〜20

240±

9

190土

8

±0.31

8.1±0.29
29

±1.2

0〜5

98士

6.4

5.6±0.36

5〜20

46±

4.6'

7.7士0.78

0〜5

46±

5.2

5〜20

45±

5.4

2.9±0.33
10

士1.2

0〜5

4±

2.8

0.2±0.15

5〜20

10士

3.2

1.1士0.35

0〜5

2100士30

19

±0.2

5〜20

630±14

37

±0.8

0〜5

6±

2.7

0.6±0.29

5〜20

27士

3.6

5.8±0.76

0〜5

270±

9

14

士0.5

Location

Sampling

Depth(cm)(pCi/kg)(mCi/km2)

(p

±0.4

81

August,1984
Sapporo′HOKKAIDO

Iwaide‑maChi′MIYAGIYokohama,KANAGAWA

Fukui,FUKUI′′

Wakayama,WAKAYAMA′′

Hagi,YAMAGUCHI
′′

0〜5

310士

9

13

5〜20

170±

7

31士1.3

18
13

0〜5

88±

5.8

3.4±0.22

5〜20

49±

4.7

6

±0.58

9

8

±0.4

41

47

±1.8

65

O〜5

180±

5〜20

280±10

4

O〜5

46±

11

26±

4.5
3.9

2.1±0.21

5〜20

4.2士0.64

3

O〜5

51±

4.3

1.7±0.14

20

5〜20

74±

5.1

7.9±0.54

21

O〜5

190±

8

11

±0.4

22

5〜20

100±

6

27

士1.6

6
65

O〜5

26±

3.6

1.3士0.18

′′

5〜20

5±

2.7

0.7±0.39

3

O〜5

13±

3.1

0.7±0.17

3

′′

5〜20

13±

3.2

2.2±0.562

3.9±0.28

24

Matsuyama,EHIME

Saga,SAGA

Naha,OKINAWA
′′

O〜5

72士

5.2

5〜20

73±

5.1

14

±1.0

12

O〜5

320±10130±6

4.6±0.14
4.6±0.22

210

5〜20

December,1984
Fukushima,FUKUSHIMA′′

66

Figure(5)SamplingLocationsinSoil
1400
12.Wak叩ama
l.Sappor0

13.KokuIリーmaChi

2.Aomori

14.00ta

3.lwaid叩ama‑maChi

15.Ts叩ama

4.Fukushima

16.Hiro$hima

5.Katsushika
6.Yokohama

17.Hagi

T.Kashiwazaki

19.Kochi

8.Kanazawa

20.Fリーuoka

9.Fukui

21.Saga

18.Mats叩ama‖I.Kumatori‑maChi

22.Obama

11.Kob￠23.NaraSEA

OFJAPANPACIFtC

OCEAN

(6)Strontium‑90andCesium‑137inSeawater(tromJul.1984toS叩.1984)‑COヱ】血ued丘･OJ刀〃b.660/血5pUムムcoむ○刀‑

Table(6):Strontium‑90andCesium‑137inSeawater
Samplev01ume

C1

90sr

analYZed(2)(0/00)(pCi/j)0dawa‑baY,KANAGAWA
Off‑Niigata‑POrt,NIIGATA

40

16.1

0.08±0.01

4 1 7

18.57

0.11±0.01

Ise‑baY,AICHI

40

10.6

0.1±0.01

Moji‑POrt,FUKUOKA

4 0

18.28

0.1±0.01

Off‑Kaseda,KAGOSHIMA

4 0

14.12

0.08±0.01

0fトTomari,HOKKAIDO

4 0

18.25

0.09±0.01

Mutsu‑baY,AOMORI

4 0

18.03

0.07±0.01

OfトMatsukawaura′FUKUSHIMA

4 3

17.78

0.09±0.01

Yamaguchi‑baY,YAMAGUCHI

4 0

20.1

0.09±0.01

Kinnakagusuku‑baY,OKINAWA

4 0

13.6

0.08±0.OC

40

11.63

0.11±0.01

Location

Iuly′1984

Aogust,1984(ノ】

September′1984
0ff‑Osaka‑POrt,OSAKA

Figure(6)SamplingLocationsofSeawater
1400
1.0fトTomari
2.Mutsリーb叩

6.ls￠‑b叩

3.0IトMat$ukawaura

8.Yam叩uChトbay

4.Odawかb叩
5.0†トHiigata‑Port

丁.0†t‑Osaka‑Port

9.0〃‑Moii‑Port
lO.oIトKaseda
ll.Kinnakagusuku‑b叩

SEA

OFJAPAN

5

PACIFIC

OCEAN

3

(7)Strontium‑90andCesium‑t3TinSeasediments(†romM叩.1984toS叩.19糾)‑COJつ伽ued万om〃b.660J血spuムムco〟0月‑

Table(7):Strontium‑90andCesium‑137inSeasediments
Location

depth

90sr

(m)

(pCi/kg)

May′1984
Mutsu‑baY,AOMORI

10

0±2.7

July′1984
0±2.3

77280

0ff‑Tokai,IBARAGI
Odawa‑bay,KANAGAWA

0±2.4

OfトNiigata‑POrt,NIIGATA

5

Ise‑baY,AICHI

1

9±2.9
1±2.5

Moji‑POrt,FUKUOKA

1

3±2.7

Off‑Kaseda,KAGOSHIMA

1 4. 54±2.8

August,1984
0壬f‑Tomari,HOKKAIDO
Matsu‑baY,AOMORI

7

1±2.4

13

14±3.250±2.4

Yamaguchi‑baY,YAMAGUCHI

10

0±2.7

Kinnakagusuku‑bay,OKINAWA

14OfトMatsukawaura,FUKUSHIMA

.4

6±3.1

September,1984
0saka‑POrt,OSAKA

5±3.3

Figure(7)SamplingLocationsofSeasediments

1400

1.0tトTomari
2.Mut$リーb叩

丁.ts￠‑baY

3.0I‖舶tsukawaura

8.0tトOsaka‑Port

4.0IトTokai

9.YamaguchトbaY

5.Odawa‑baY

川.Moii‑Port

6.0什‑Nii卵ta‑Portll.oIトKaseda
12.Kinnakagusuku‑baY

SEA

OFJAPAN汐

PACIFIC

OCEAN