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RadioactivitySurveyDatinJapanⅣⅦmber25

Ⅳ0V.1969

ContentsI)ATA

OF

ROUTINESURVEY

Page
ExternalDose
ExternalExposure

dueData
toplantI

NaturalRadiation

Concentration｢肋如那J血ざ班別七〆励dわJ曙オc扉
5c≠β乃C叫

洗滋批都ノ‥1

DATA

OF

THE

TENTH

NUCLEAR

REPUBLIC

MeteorologicalI)ata
GrossBata‑radioactivitylnRainandDryFallout

of Carbon‑1｢肋fわ乃αJ劫ざ招払ね好j

TESTOFOFTHE

CIIINA

Gross

Beta‑radioactivityin｢ReseaTrhandDeuel坤抑P

DATAOFROUTINESUR
ExternalDose

Extern&lExposuredue.toDataNatur&lRadiatioA｢肋如那J血ぶff如β好助dわJ呼fcαJざc由乃α可A

field

surveynaturalradiation
theandKyushuexposureof
has

districtbeen

conducted

toatMay,1968

gamma‑rayOctober,1969.
The

KyushudistrictinJapanof thesituationis shownin

Figurel.Distribution

locationsin

theof

districtisindicatedin

weremeasurements

were

and
l19sites

were

ionization

200mm

adequate

×1d

andusedasadi氏cult

toobservethatapparatus,SOadetector

scintillator

ments.Inllsites,bothwassurvey･

ofsurveymeterconsistingusedconsidered

of

due

population

tote

artificial
eXpOSure

eachlocationexposuredlineachprefectureoftheKrin Table2andFigure3.

Figurel.The

Situationarech･measurement,

alllocations
awellasbechamber

wallthickness

standardasmay

Spherical

3mm(acrylate)has
and
forfieldsurvey.The

sensitivity
wasCOntained

uslng

scintillation

diameterrespectively

theaaandrays

thatitandtotalofsphericalplasticionization

Of whichinner

butitismadethere.A

rateS

COSmicGamma‑rayobservation

madewerechambermeter.The

amber

for

theaboveeXPOSure

radiationinchosen

open

meter

Of fallout

observedmeasured.

Observations

one

Figure2.

In eachlocation,fromonetofoursitescontaining
atleast5stations

Measurementsin

throughout

duringofJapan

due

rates

onlybywhichaNal(Tl)1P￠

for

regularmeasure‑thechamberand1350

theof】

1Kitakyushu
2Genkai
3Munakata
4Nogata
5Iizuka

31Nagasaki
32Shimabara
33Ichinomlya
34Aso
350guni61ロsa62]Nobeoka
63Hinokage
64Takachiho
65Gokase

6Fukuoka
7Shima8Maebaru
90nolO Kurume360tsu37Kikuchi
38Yamaga
39Tamana
40Kumamoto

66Shiiba
67Ebino68Kobayashi
69MiyakonoJO
70KushimallOkawa
120muta
13Yame14Amag1
15Kaho41Uto
42Misumi
43Matsushima
44Hondo
45Yatsushiro

71Nichinan
72Takaoka
73Miyazaki
74Saito75Tsuno16Buzen
17Yukuhashi
18Saga19Taku20Karatsu

46Taura47 Minamata
48Hitoyoshi
49Nakatsu
50Yabakei

76Hyuga
77Kirishima
78Kurino
790guchi
80Izumi21Genkai
22Imari
23Takeo
24 Matsuura
25Tabira

51Ita
52Taketa
53Ume54】Kamae
55Saiki

81Akune82Sendai
83SendaiKumi2;aki
84Kushikino
85Kaseda

26Emukae
27Saseho

56Tsukumi
57ロsuki

86Makuraヱaki
87Ibusuki
88Kiire89Kago$hinaKagehara
90Kagoshima

28Higashisonogi580ita
290mura30Isahaya

59Beppu
60Yamaga

Figure2.Distributionoftoeac

91Ka2;iki
92Kokubu93Tarumiz
94Kanoya
95SataTablel.Gamma‑ray

Exposure

Rates

due

NaturalRadiationin

Oct.1969‑‑May,1968and
By S.Abe,N.Sekiguchi,K.ShimiヱuandI.Suy;

仲加血陥=如血扉=げ風戚嗣噌ぬ〟翫鹿町叫Prefecturer

Location

Apparatus

●■1̲̲

1

̲

A

BBBBB

1625631002鑓U2

1Kitakyushu
2Genkai
3Munakata
4Nogata
5Iizuka

Exて蒜昆,Fate

Location

123Takeo

1 1 (U

1●

●

l●

●

l●

●

●

l

一BBBBB

■

‑

■

■

●

BBBBB

史U55659(U880■l●

●

●

l●

73592
6q〓占9只U

48Hitoyoshi

BBBBB

●●●●●

一l●AA

B

BBBBB

■

(U22〈U(U91910●ll●●l (U●●l●BBBBB

9(U150ロq)18史U
●

●

●

●

●BBB

l9ウ]97(U759Beppu
60Yamaga
61Usa

BBBB

●l (U 154Kamae
55Saiki
56TsukuIni
57Usuki
580itaB■

43Matsushima
44Hondo
45Yatsushiro
46Taura47Minamata

49Nakatsu
50Yabakei
51Hita52Taketa
53口me

Oita

●33729778史U7

KumamotoA●

33Ichinomiya
34Aso
350guni
360tsu37Kikuchi
38Yamaga
39Tamana
40Kumamoto
41Uto
42Misumi●

qV27527
8史U8(U290mura
30Isahaya
31Nagasaki
32Shimabara

A

●

BBBBB

24Matsuura
25Tabira
26Emukae
27Saseho
28Higashisonog1

■

BBBBB

18Saga19Taku20Karatsu
21Genkai
22Imari3359(Uq)7(U8(UN a g a S a ki

Apparatus

59715q)9(USaga

Exて蒜岩,芦ateEx謂綜ate

Location

77Kirishima
78Kurino
790guchi
80Izumi81Akune

BBBBB

23(U6589(UO7●

●

11●

●

̲

82Sendai
83SendaiKumi2;aki
糾Kushikino
85Kaseda
86Makuraヱaki

●

BBBBB

85714
989∧U8Kagoshima

Apparatus

●

●

1●

̲BBBBB

Eagehara■

1

史U2766
5(U7800

87弱約9091監榊姐■lm a■lm a●●A■■

92Eokubu
93Tarumiヱu94Kanoya
95SataTable2.Population

BBBB

B:Scintillation

7∧U77
97史リ7

Note.A:SphericalIoniヱation

コ

〓

〓∵

Chamber
Surveymeterto NaturalRadiationin
due
exposure
By
S.Abe,N.Sekiguchi,K.Shimizu

PrefectureeachandI.Suyama

of｢肋fわ那J血ざ一触fgげ励dわわgfcαヱ5cfβ那βぶノP7㌍箭*Prefecture
Fukuoka

ExposureRat諜昔

3965

10.8士1.3

只U7 2

10.3士1.1

Nagasaki1 5 6 只)8.8士0.8

Kumamoto

1 7 4 (U8.6±1.0

Oita

1 1 00 7

9.1±1.0

Miyazaki

1 (U8 1

9.7土1.4

Kagoshima

1781

8.7士1ユSagaⅩyusbu

9.6士1.2

NationalCensusin1965
Figure3.Population

exposure

dueto

NaturalRadiationin

eachPrefectureofPヲ]urbanAr｢｢RuralAr･

PlantConcentr&tioTL

Plant

Of C&rbon‑14in

Data

Es8entialOil｢肋fわ那J血ざffねね正月αdわJ曙わαJ5cfg乃αざノIn
in

this

thymolandliquidconcentrationsof

work,thementhoIwere

wereannualvariations

methodobserved

1968.Samplinglocations
Samplemeasuredcounting

scinti11ation

arematerials

andcounting

from

the

everyyear

method.

The

results

andbytheOTihodon

tomethylation

Chiba

thestrongmask

tOitsphenolicvialandO.4%ofPPOandO･01%POPOPw/w
dissolvedinit.
MenthoIwas

2.Menthol:肋ntaarvensisto1968inbyyeartheeastpartofHokkaidoandprepared
Federation
KitamiFactoryof theSocieties

culturalCooperative
1963and1965,theOkayama
been

from
obtainedfrom1942

every

cultivatedPrefecture

forliquidusedasscinti11ator

Hokkaido･Inofconversion

obtained.The

p‑Cymene,Whichis

Agrl‑

of

cultivatedinfield
Co･have
Toyo
Hakka

samplebywasan

COnCentrationin
rizedingroupwascarriedout.Eighteengramsofthymol
methyletherwas
weighedin20mllowpotassium
weretheobtainedannuall
plant

esミ

Figure5.

cultiva‑

ofquenchingactionofthymolowlng

glass

4,and

washarvested

experimentalfield

University.The

etficiency

standard
Result:toplant

from1954to1968wasinSeptemberinthe

COunting

theirmethod:essentialoilofwtheFigure4･

obtainedjl坤Onicium Benth(Labiates).The
tedandfrom1942

shownin

1.Thymol:ThymoIwas
usualmethodby

MarkIcounter

CagO

carbon‑14ofmentholto

excellent
carriedof

soIvent

out･TheFigure4.Sampling

LocatiTable4.AnnualVariatic

Table3.AnnualVariationofCarbon‑14ConcentrationinThymolby

Y.Kasida.T.Iwakura

A.Maebayashi‑1954to1968一

Menthrationin
A.Maebayz
andand｢胸如那J血5f抽

仲加加融血感触加軒励前曲劇痛ふ如榔叫託琵霊

lofChibaUniversity･of NationalInstitute

B…:Experimentalfield

RadiologicalSciences･*++:95%confidence(2sigma)

ケケクlllケ

lofケ

ケケクケク

lllll

Kitami,Hok

姐搬捕ケ姐

A■:Experimentalfield

17.21
17.49
19.57
26.02
23.97

Locatio捌957捌959㈱●19421947
1948
1952
1953

鵬幻亜1942■

YearofHarvest

14.05■*■
13.28
15.84
15.16
16.82

23器222119■■

̲･■■ケケケケク●暮BBBB

ケケ少々クlll

ケクケケケ

lPref.A*ケケケケケケケlllll

Chiba･Shi,Chiba

ケケケ

捌956957958959抑配賦捕脱捕ケ弼967臓llll

認諾C諾霊払Locationク

Okayama
Kitami,Hokk

1965
1965
1966
1967
1968

ケ

0kayama
Kitami,Hokk●Thymol已OqhdU叫＼己dp已○…葛Jl忘じ亡○

24･

22.

2〇.

18.

OMenthol

Prerケク■Farmof+*Farmof thethe

HokurelToyo**+95%confidence(2sij

Figure5･AnnualVariationofl̀CConcentrationinPlant

Pre■

EssentialOil:ThHI)ATAOFTHETENTH*NUCTESTOFTHEPEOPLE,;
REPtJBLICOFCHINA
*The

ninth

test

site
detonation

testwasnucleartosupposedwaswasconducted
bein
theof

neighborhood

Lake

LopNor.

TNT.

to20〜200kilotons

equlValent

Septem

undb曙和undonthe23rd●MeteorologlCalData
Gro錮Bet&･radio&Ctivityin

Rain

andDryFalloutr肋ね口和J曙わαJ4那花印ノSurveyfa1lout

has

13stations

beta‑aCtivitylnof grossrain anddry
been
theof
conducted
withnetworkof MeteorologlCalAgency
showninThe

processes

same

onesofwith

nucleartenthneighborhoodLong.)about4,000

areaisof Lakeexplanationontheofout

tothe

test

arepublication

test

carriedcounting

andthethiswasof China
PublicSeptember,1969accordingThe

sampling
thatinNo.50fpage2,Issue
The
tenthJapan.

thenormalinon

theseperiod.
Observati

logicalAgency

series.
People's

Re‑

29th

thenews

believedthiミ

grounedin

Figure6.Fa1lout

Figure6.

thenearof@BasicStation(Rainand●SupplementaryStation(Rainreporting.
tobeinLop

Nor,(400N.Lat.,900E.

kilometers

west‑nOrthwest

theof

Dus

1350

Table5.Grossβ･aCtivityinRain‑Sept･29toOct･9,1969
byT.Nagai,T.Honda,H･Ueno

Compiled

aIr肋如rβねgf甜JAgg押印ノ

UpperRank:Concentration(PCi/CC)
Lower
Rank:Deposition(mCi/km2)

0.0

0.0

Sapporoク■bケ

Sendai●0･00･〇一〇･10A一1

Eushirol一一1

l一l一〇･10･3一l

ケ0･30･71一l

0･00･00･37･70･70･00･00･O1
0･10･40･10･50･｡0･｡〓0･1讐l〓0･0讐一〇･｡0･｡〓〓0･｡M
0.0
0.0

Wakkanai

0000140013180000n=UO▲U∧UOOOOOO∧UOOOOOOOOOOOO〓0･1讐l二〇･00･0〓0･10･20･｡0･｡〓0･｡0･0ケ●

l一一一一一Akita●

ク●

Tokyo●●

ケ●

Hachijojima

●

ケ●

Osaka

●

ク●

Yonago●ケ●

Murotomisaki●ク●

Fukuoka●ク●

Kagoshima●

0･00･O
ll0.0
0.0

0.00.0●

ク0･00･00･00･〇一〇･10･7Wajima

l一一

0･00･00･00･00･00･00･00･00･30･4一一一●

ク

Table6.Grossβ･aCtiYityinDust‑Sept･29thtoOct･8th,1CompiledbyT･Nagai,T･HondaH･Ueno

andI｢肋紬￠r￠ねgf甜J4卯押印ノ(pCi/mりSep忘1脚 30

Station

O(U(U●

22477●(U(U∧U2.425

22A一2(U(U∧U(U10●∧U(U∧U∧U∧U

●

25527

Table7.The∧U(U∧U(U(USapporo
SendaiTokyo
Osaka
Fukuoka伽tl朋●Testof′MicrobarographicRecordsProducedbythelOthNuclear
Of China‑Sept.29,1969‑
CompiledbyT.Nagai,T･Honda,H･Ueno｢肋ねβ和わ由"JAg班印ノand

K･MatuFigure7.Isochrones
Timeof the First
Explosion:aboutofShock

Wave

Test

Site:the*Numerali｡dicatesthearrivaltimeof

Figure8.The

MeteorologlCalTrajectory
People's物祉

Republic

蒜●埜拍

Neighborhoodof Lak

O8:00,Sept.29th,1969(G.M.T.)of ChinaattheTimethefirstshock･(G･M･‑T･)
whenthelOthNuclearTestwa

Air

tJpperGros8Bet&･Radioactivityinr励ざα打℃ゐα乃d加〃gヱ坤醐乃f且Q･,ノ卸α乃か̀痺兜ざg4酢〃印ノSince1960,Research

hasJapanDefenseAgency

Figure9.Three

H･Q･,

Developmentandbeta‑

themeasured

strato‑activityofdustinthelowerlayeroftheOsphereandtropopauseuslngaircraftascollectors･
Thesampleswere

theandaircraftwings
in frontof them.

of which
other

two

attachedgummedpapersunder
attached

betweenthethetheamounts

atvalue

ofby

collected

samplesastime･Onesame

aircraftatthe

andnormalsamplingflightdownward丑ight･The
upward
and

only

taken

samplers

amade

differenceof

FlightArea
Flight Tracksamplingflightwithgummedpaperswas

using

made･･‑‑

takenoverthreeareasof

Japanusingbothdust

Thes

the

the丑ight

theradioactivity

twoaircraftis

altitude.

Figure9showsthreesamplingareasofJapan･Astothetenth

nucleartest,aircraft

detectedoverthreesampling

little amountofradioactivity

ofJapan,eXCept

areas
on

themorning

isassumed
theNorth

area,Tohoku,thelst,October,1969･Soitof

thattheradioactive

cloud

passedoverofJapan.

ResultslO

North

theTable8.Figure

obtainedisshownin
theshows

activityln

temporalvariation

upperof grossbeta‑

air ataltitudesfromabout6km

tolOkm.
UpperAir‑Sept･30th
K.Kenmochi,S.Igarashi,T.Akimoto

toTable8.Grossβ･aCtivityin
By

Oct･2n(andF｢点βざgαrCゐα乃d上)甜βわ戸別g乃f且￠リ♪坤α紹βげg那β(pCi/m3)
Chubu…

Tohoku*10,500〜12,00Om

6,000〜8,000m

̲3111ウ】
0(U(U(U●

●●

O■>>>

Sept.30,1969
11.00
a.m.
1.00 p.m.
3.00 p.Ⅲ.
5.00 p.m.
7.00 ロ.m.

10,0000.1

FigurelO.TemporalVariationofGrossβ･aCtivityinUpperAir‑Sept･30toサー0‑10,500‑12,00OmlTobob

Oet.1
1969