occupational exposure at japanese nuclear power plants
DESCRIPTION
2012 ISOE Asian ALARA Symposium September 24- 25, 2012, JNES, Tokyo Japan. Occupational Exposure at Japanese Nuclear Power Plants. Yoshihisa HAYASHIDA Japan Nuclear Energy Safety Organization (JNES). Nuclear Power Plants in Japan. as of March 31, 2012. Oma. - PowerPoint PPT PresentationTRANSCRIPT
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Occupational Exposure at Japanese Nuclear Power Plants
2012 ISOE Asian ALARA Symposium
September 24- 25, 2012, JNES, Tokyo Japan
Yoshihisa HAYASHIDAJapan Nuclear Energy Safety Organization (JNES)
2
Nuclear Power Plants in Japanas of March 31, 2012
BWR PWR GCR Total
No. of Units 26 24 - 50
In Operation Output (MWe) 25,870 20,278 - 46,148
No. of Units 3 - - 3 Under
Construction Output (MWe) 4,141 - - 4,141
No. of Units 6 3 - 9
On Planning Output (MWe) 7,721 4,666 - 12,387
No. of Units 6 - 1 7 Under
Decommissioning Output (MWe) 4,192 - 166 4,358
3
Nuclear Power Plants in Japan
55 Units in Operation (PWR 23, BWR 32) as of March 31, 2006
女川福島第一
ふげん(2003年より廃止措置準備中)
敦賀
志賀
出力規模
50万kW未満 100万kW未満 100万kW以上 合計 53基 出力47,122MWe
7 8
TEPCO 1
55
22
7 8
1
555
Higashi Dori
Oma
Tomari
Onagawa
Tokai No. 2
IkataSendai
Genkai
Shimane
Kaminoseki
Takahama
Ohi
Mihama
Tsuruga
Tokai
(on a decommissioning stage since 2003)Fugen
Shika
Higashi Dori
Fukushima Daiichi
(On the decommissioning stage since 1998)
Namie-Odaka
Kashiwazaki-kariwa
33
Output scale In operationUnder Construction
On planning stageLess than 1,000,000kW 1,000,000kW
Total 50 Units 46,148MWe(PWR 24 units, BWR 26 units )
500,000kWLess than More than
Fukushima Daini
3
Hamaoka(Unit 1,2 On the decommissioning stage since 2009)
6
2
(Unit 1,2,3,4: On the decommissioning stage )
4
Average Individual Dose in Fiscal Year 2011(April 2011 – March 2012)
Plants Units Persons mSv/person
BWR 221 33,519 0.69
PWR 24 28,183 0.82
LWR(BWR+PWR)
46 61,702 0.75
1. Includes Hamaoka 1 & 2 under decommissioning, and dose not include Fukushima Daiichi (6 BWR)and Fukushima Daini (4 BWR)
5
Trend of Average Individual Dose
0
1
2
3
4
'90 '91 '92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09 '10 '11
Fiscal Year
Indi
vidu
al d
ose(
mSv/
pers
on)
0
50
100
150
200
Average Individual DoseNo. of Wokers exceeding 20 mSv/y
Per
son
*) Data exclude Fukushima Daiichi for FY 2010, and Fukushima Daiichi and Fukushima Daini for FY 2011.
6
Collective Dose in Fiscal Year 2011 (April 2011 – March 2012)
Plants Units Person-Sv Person-Sv/Unit
BWR 221 23.17 1.05
PWR 24 23.12 0.96
LWR (BWR
+PWR)
46 46.29 1.01
1. Includes Hamaoka 1 & 2 under decommissioning, and dose not include Fukushima Daiichi (6 BWR)and Fukushima Daini (4 BWR)
7
Trend of Average Collective Dose per Reactorand Capacity Factor
0
1
2
3
4
5
'90 '91 '92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09 '10 '11
Fiscal Year
Ave
rage
Col
lect
ive
Dos
e (P
erso
n.Sv/
Uni
t)
0
10
20
30
40
50
60
70
80
90
100
Average Collective Dose Cpacuty Factor
Cap
acut
y Fa
ctor
(%)
*) Dose data exclude Fukushima Daiichi for FY 2010, and Fukushima Daiichi and Fukushima Daini for FY 2011.
8
Trend of Capacity Factor by Month (January 2011 – August 2012)
0
10
20
30
40
50
60
70
80
'11/1
'11/2
'11/3
'11/4
'11/5
'11/6
'11/7
'11/8
'11/9
'11/1
0
'11/1
1
'11/1
2'12
/1'12
/2'12
/3'12
/4'12
/5'12
/6'12
/7'12
/8
Year / Month
Cap
acity
Fac
tor (%
)
Capacity Factor
9
BWR Average Collective Dose per Reactor by Country(1980-2011)
*) Dose data exclude Fukushima Daiichi for FY 2010, and Fukushima Daiichi and Fukushima Daini for FY 2011.
0
5
10
15
'80 '81 '82 '83 '84 '85 '86 '87 '88 '89 '90 '91 '92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09 '10 '11
Year
Per
son.
Sv/
Uni
t
J apanU.S.A.GermanySwedenFinland
10
PWR Average Collective Dose per Reactor by Country(1980-2011)
0
5
10
15
'80 '81 '82 '83 '84 '85 '86 '87 '88 '89 '90 '91 '92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04 '05 '06 '07 '08 '09 '10 '11
Year
Per
son.
Sv/
Uni
t
J apanU.S.A.GermanyFranceKorea, Republic of.
11
Average Collective Dose by Site (BWR)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 5 10 15 20 25 30 35 40
Average Plant Age by Site (Year)
Ave
rage
Col
lect
ive
Dos
e(p
erso
n.Sv/
unit)
BWR
12
Average Collective Dose by Site (PWR)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 10 20 30 40 50Average Plant Age by Site (Year)
Ave
rage
Col
lect
ive
Dos
e(p
erso
n.Sv/
unit)
PWR
13
Contribution of outage collective dose to annual collective dose (5-year average)
50
60
70
80
90
100
2003-2007 2004-2008 2005-2009 2006-2010
Fiscal Year
Rat
io(%
)
BWRPWRLWR(BWR+PWR)
14
0
2
4
6
8
10
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 年 度
(Sv
/)
線量人･
定検
従来型 改良型
Fiscal year
(per
son.
Sv/
outa
ge)
Comparison of outage collective dose between conventional type and improved type
(LWR)
Conventional type: Plant before 1982
Improved type: Plant after 1983
Avera
ge C
olle
ctiv
e D
ose
15
0
2
4
6
8
10
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 年 度
(Sv
/)
線量人･
定検
従来型 改良型
(per
son.
Sv/
outa
ge)
Fiscal year
Comparison of outage collective dose between conventional type and improved type
(BWR)
Conventional type: Plant before 1982
Improved type: Plant after 1983
Avera
ge C
olle
ctiv
e D
ose
16
0
2
4
6
8
10
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 年 度
(Sv
/)
線量人･
定検
従来型 改良型
(per
son.
Sv/
outa
ge)
Fiscal year
Comparison of outage collective dose between conventional type and improved type
(PWR)
Conventional type: Plant before 1982
Improved type: Plant after 1983
Avera
ge C
olle
ctiv
e D
ose
17
Correlation between Elapsed time after commencement of commercial operation and
Exposure per outage (Japanese BWR)
0
1
2
3
4
5
6
7
8
0 10 20 30 40 50
Elapsed time after commencement of commercial operation (year)
Exp
osu
re (
per
son
-Sv/
ou
tag
e)
BWR 2010
BWR 2009
BWR 2008
18
Correlation between Elapsed time after commencement of commercial operation and
Exposure per outage (Japanese PWR)
0
1
2
3
4
5
6
7
8
9
0 10 20 30 40 50Elapsed time after commencement of commercial operation (year)
Exp
osu
re (
per
son
-Sv/
ou
tag
e)
PWR 2010
PWR 2009
PWR 2008
19
Thank you for your attention !!