1

OUTLINE of OCCUPATIONAL EXPOSURE at JAPANESE NPPs

in FY 2009 and 　　　　　　　　　　　　　　　　　　　　　

the ISOE ATC Activity

2010 ISOE Asian ALARA Symposium

August 30- 31, 2010, Gyeongju, Korea

Akiko SUZUKI Nuclear Energy System Safety Division

Japan Nuclear Energy Safety Organization (JNES)

2

Nuclear Power Plants in Japanas of January1, 2010

BWR PWR Total

In Operation

No. of Units 30 24 54

Output (MWe) 28,569 20,278 48,847

Under Construction

No. of Units 2 0 2

Output (MWe) 2,756 0 2,756

On Planning

No. of Units 9 3 12

Output (MWe) 11,886 4,666 16,552

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 54 Units 48,847MWe(PWR 24 units, BWR 30 units )

500,000kWLess than More than

Fukushima Daini

3

Hamaoka(Unit 1,2　 On the decommissioning stage since 2009)

6

2

4

Nuclear Power Plants in Japan Average Individual Dose in Fiscal Year 2009

(April 2009 – March 2010)

Plants Units Persons mSv/person

BWR 321 52,920 0.8

PWR 24 28,876 1.3

LWR(BWR+PWR)

56 81,796 1.0

1.Includes Hamaoka Unit No.1 & No.2 in BWRs that have been decommissioning since Nov.18,2009.

5

Nuclear Power Plants in Japan Trend of Average Individual Dose

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

Fiscal Year

mS

v/pe

rson

0

50

100

150

200

250

Average Individual Dose

No. of Wokers exceeding 20mSv/y

Per

son

6

Nuclear Power Plants in Japan Collective Dose in Fiscal Year 2009

(April 2009 – March 2010)

Plants Units Person-Sv Person-Sv/Unit

BWR 321 43.50 1.36

PWR 24 38.56 1.61

LWR (BWR

+PWR)

56 82.06 1.47

1.Includes Hamaoka Unit No.1 & No.2 in BWRs that have been decommissioning since Nov.18,2009.

7

Nuclear Power Plants in Japan Trend of BWR Average Collective Dose

and Capacity Factor per Reactor

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

Fiscal Year

Exp

osu

re, p

erso

n-S

v/un

it

0

10

20

30

40

50

60

70

80

90

100

Exposure Capacity Factor(%)

Cap

aci

ty F

acto

r

8

Nuclear Power Plants in Japan Trend of PWR Average Collective Dose

and Capacity Factor per Reactor

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

Fiscal Year

Exp

sure

, Per

son-

Sv/

uni

t

0

10

20

30

40

50

60

70

80

90

100

Exposure Capacity Factor(%)

Cap

acity

Fac

tor

9

ISOE Structure

OECD/NEA

CRPPH

　　Secretariat　

(OECD/NEA,IAEA)

Management BoardBureau

ETC

13 countries

NATC

3 countries

IAEATC（ Non-

OECD）11 countries

ATC2 Countries(Japan, Rep.of Korea)

65 Participating Utilities in 28 countriesRegulatory authorities of 23 countries

10

1. Data Collection: ISOE database

2. Evaluation & Analysis of dose trend in

Worldwide by using ISOE Data　

3. Information Exchange between ISOE

Participants: RP forum

4. Preparing Information Sheets (Korean ver. &

Japanese ver.)

5. ISOE-ATC Website

Activities of the ISOE-ATC

11

ISOE Network – Data collection

12

BWR Average Collective Dose per Reactor by Country(1980-2008)

(Person.Sv/ unit)

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

Year (Fiscal year）

U.S.J apan

SwedenGermany

13

PWR Average Collective Dose per Reactor by Country(1980-2008)

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

Year (Fiscal year）

U.S.FranceJ apanKorea,Republic of.GermanyBelgium

(Person.Sv/ unit)

14

0

50

100

150

200

0 50 100 150 200 250 300 350

Annual average operating period (days)

Ann

ual a

vera

ge o

utag

e (d

ays)

USA

GERMANY

SWEDEN

KOREA

J apan

FRANCE

Capacity Factor ９０％

Capacity Factor ８０％

Annual average of the operation period and maintenance period by country (1999 – 2008)

15

0 20 40 60 80 100

PWR

BWR

LWR

RATIO (％)

Outage Collective Dose

Outage Collective Dose

Outage Collective Dose

Contribution of outage collective dose to total collective dose for Japanese NPPs (2004 – 2008)

RATIO: Outage Collective Dose/Total Annual Collective Dose

16

Analysis

ATC evaluated based on ISOE Database

-outage RWP man.hours

-outage dose by job

-outage dose rate information

ActionATC contacts each ISOE national coordinator to investigate the differences in outage work scope.

17

The ISOE databaseAverage collective dose by Job 　 (CRD) per outage (2004-2008)

0

0.1

0.2

0.3

0.4T

VO

1T

VO

2B

RU

NS

BU

TT

EL

1G

UN

DR

EM

MIN

GE

N B

GU

ND

RE

MM

ING

EN

CIS

AR

1K

RU

MM

EL

1P

HIL

IPP

SB

UR

G 1

CO

FR

EN

TE

S 1

GA

RO

NA

1B

AR

SE

BA

CK

1F

OR

SM

AR

K 1

FO

RS

MA

RK

2F

OR

SM

AR

K 3

OS

KA

RS

HA

MN

1O

SK

AR

SH

AM

N 2

OS

KA

RS

HA

MN

3R

ING

HA

LS 1

LEIB

ST

AD

T 1

MU

HLE

BE

RG

1D

RE

SD

EN

2D

RE

SD

EN

3LA

SA

LLE

1女

川1

女川

2女

川3

東通

1福

島第

１-1

福島

第１

-2福

島第

１-3

福島

第１

-4福

島第

１-5

福島

第１

-6福

島第

2-1

福島

第2-

2福

島第

2-3

福島

第2-

4柏

崎刈

羽1

柏崎

刈羽

2柏

崎刈

羽3

柏崎

刈羽

4柏

崎刈

羽5

柏崎

刈羽

6柏

崎刈

羽7

志賀

1志

賀2

浜岡

1浜

岡2

浜岡

3浜

岡4

浜岡

5島

根1

島根

2東

海第

二敦

賀1

NE

CK

AR

1P

HIL

IPP

SB

UR

G 2

UN

TE

RW

ES

ER

1K

OR

I 1K

OR

I 2K

OR

I 3K

OR

I 4U

LCH

IN 3

ULC

HIN

4U

LCH

IN 5

ULC

HIN

6Y

ON

GG

WA

NG

1Y

ON

GG

WA

NG

2Y

ON

GG

WA

NG

3Y

ON

GG

WA

NG

4Y

ON

GG

WA

NG

5Y

ON

GG

WA

NG

6

person.Sv（ ）

Problems in comparing the exposure by Job/ task - Scope of Job/ task lack clear definition -The number of units that input data is insufficient

18

ISOE Network – RP forum

19

　Information Sheets

ATC is responsible for preparing Information sheets on the Republic of Korea and Japan.

The annual topic The special topic

20

ISOE-ATC Web site

ATC Databasehttp://www.jnes.go.jp/isoe/english/

The data for Japan, Rep. of Korea and Taiwan.

The data for Japanese Nuclear 　 Facilities,　 including Fabrication facilities,

Reprocessing facilities, Waste burial facilities and Waste management facilities.

21

ATC plans for the future …

Enhancement of use the RP forum in ISOE Network.

Promotion of linkages in Asian countries that don’t belong to ISOE-ATC, such as China, India, Pakistan and Taiwan etc.

Ongoing exchange of experience and knowledge in occupational exposure reduction at NPPs at the Asian ALARA symposium.

22

Thank you for your attention !!