Occupational exposure at japanese nuclear power plants in 2006
This presentation is the property of its rightful owner.
Sponsored Links
1 / 22

OCCUPATIONAL EXPOSURE at JAPANESE NUCLEAR POWER PLANTS in 2006 PowerPoint PPT Presentation


  • 67 Views
  • Uploaded on
  • Presentation posted in: General

2007 ISOE Asian ALARA Symposium. OCCUPATIONAL EXPOSURE at JAPANESE NUCLEAR POWER PLANTS in 2006. September 12-14, 2007, Seoul, Korea Yoshihisa Hayashida Safety Information D i vision Japan Nuclear Energy Safety Organization (JNES). Nuclear Power Plants in Japan. as of March 31, 2007.

Download Presentation

OCCUPATIONAL EXPOSURE at JAPANESE NUCLEAR POWER PLANTS in 2006

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Occupational exposure at japanese nuclear power plants in 2006

2007 ISOE Asian ALARA Symposium

OCCUPATIONAL EXPOSURE at JAPANESE NUCLEAR POWER PLANTS in 2006

September 12-14, 2007, Seoul, Korea

Yoshihisa Hayashida

Safety Information Division

Japan Nuclear Energy Safety Organization (JNES)


Nuclear power plants in japan

Nuclear Power Plants in Japan

as of March 31, 2007


Nuclear power plants in japan1

Shika

志賀

Oma

Namie-Odaka

Fugen

ふげん

Tomari

(2003

)

(on a decommissioning stage since 2003)

年より廃止措置準備中

Kashiwazaki-kariwa

Higashi Dori

Monju

2

2

(FBR))

(FBR))

(

(

Higashi Dori

TEPCO

TEPCO

Onagawa

女川

Tsuruga

敦賀

2

2

1

1

Fukushima Daiichi

福島第一

Mihama

8

8

7

7

Fukushima

Daini

Oi

Tokai

Takahama

(On the decommissioning stage since 1998)

Tokai No. 2

Shimane

Kaminoseki

Hamaoka

5

5

5

5

5

Ikata

Genkai

Sendai

出力規模

Output scale

In operation

Total 55 Units 49,467MWe

Under Construction

合計

53

出力

47,122MWe

(PWR 23 units, BWR 32 units )

Less than

More than

50

kW

未満

Less than

100

kW

100

kW

未満

以上

On planning stage

500,000kW

1,000,000kW

1,000,000kW

Nuclear Power Plants in Japan

55 Units in Operation (PWR 23, BWR 32) as of March 31, 2006


Trend of capacity factor in japanese plants

Trend of Capacity Factor in Japanese plants


Individual dose in fiscal year 2006 april 2006 march 2007

Individual Dose in Fiscal Year 2006 (April 2006 – March 2007)


Trend of individual average dose in japanese plants

Trend of Individual Average Dose in Japanese plants


Collective dose in fiscal year 2006 april 2006 march 2007

Collective Dose in Fiscal Year 2006 (April 2006 – March 2007)


Trend of bwr average collective dose per reactor in japanese plants

Trend of BWR Average Collective Dose per Reactor in Japanese Plants


Trend of pwr average collective dose per reactor in japanese plants

Trend of PWR Average Collective Dose per Reactor in Japanese Plants


Trend of maintenance exposure at japanese bwrs

Trend of Maintenance Exposure at Japanese BWRs


Trend of maintenance exposure at japanese pwrs

Trend of Maintenance Exposure at Japanese PWRs


Collective dose during outage vs year of commercial operation started bwr 1996 2006

Collective Dose During Outage vs. Year of Commercial Operation Started (BWR: 1996 - 2006)


Collective dose during outage vs year of commercial operation started pwr 1996 2006

Collective Dose During Outage vs. Year of Commercial Operation Started (PWR: 1996 - 2006)


Bwr average collective dose per reactor by country

BWR Average Collective Dose per Reactor by Country


Pwr average collective dose per reactor by country

PWR Average Collective Dose per Reactorby Country


Bwr three year rolling average by plant in usa and japan

BWR Three Year Rolling Average by Plant in USA and Japan


Pwr three year rolling average by plant in usa and japan

PWR Three Year Rolling Average by Plant in USA and Japan


Dose rate at plr piping in japanese bwr and us bwr

Dose Rate at PLR Piping in Japanese BWR and US BWR


Operation period and maintenance period by country from 1996 to 2005

Operation Period and Maintenance Period by Country from 1996 to 2005


Further exposure reduction

Further Exposure reduction

  • Japanese utilities are continuing the approach for further exposure reduction.

  • Regulatory side will encourages and support their activity.

  • The effort ofthe improvement on inspection way for nuclear facilities is continued in Japan.


Summary

Summary

  • BWR average collective dose per reactor for 2006 decreased 3 years in a row, and the value of 1.33 person-Sv is the lowest in the past.

  • Average collective dose per reactor for PWRs shows a stable trend in general in around 1 person-Sv.

  • Relatively much maintenance work is performed in Japanese plants.

  • It is expected that the improvement of inspection way and utility’s ALARA activity will promote to decrease the exposure in Japanese plants.


Thank you for your attention

Thank you for your attention !!


  • Login