slide1
Download
Skip this Video
Download Presentation
Japan Fukushima Update September 4, 2013

Loading in 2 Seconds...

play fullscreen
1 / 51

Japan Fukushima Update September 4, 2013 - PowerPoint PPT Presentation


  • 130 Views
  • Uploaded on

Japan Fukushima Update September 4, 2013. C hanges being implemented in the Nuclear industry resulting from the Great East Japan Earthquake of March 11, 2011 (Fukushima) Ken Evans Cecil Settles. Background of the accident Nuclear Industry Response Nuclear Regulator Commission Response

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Japan Fukushima Update September 4, 2013' - zonta


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
japan fukushima update september 4 2013
Japan Fukushima UpdateSeptember 4, 2013

Changes being implemented in the Nuclear industry resulting from the Great East Japan Earthquake of March 11, 2011 (Fukushima)

Ken Evans

Cecil Settles

slide3

Background of the accident

  • Nuclear Industry Response
  • Nuclear Regulator Commission Response
  • IEMA Actions
japan facts
Japan Facts
  • Japan 145,000 square miles
  • State of California 163,695 square miles
  • State of Illinois 57,914 square miles
  • Fukushima Prefecture 5,321 square miles
  • State of Connecticut 5,554 square miles
  • Sangamon County 868 square miles
  • Japan 127.34 million people
  • Fukushima Prefecture 1.99 million people
  • California 38.04 million people
  • Connecticut 3.50 million people
  • Chicago 2.67 million people
slide7

Impact

15,881 Dead /2,668 Missing

Zero deaths attributed to radiation

  • The 4th worst recorded earthquake since 1890.
  • Honshu Island shifted about 2.5 m (~ 8 feet) eastward and downward
  • Earth’s day shortened by ~1.8 microseconds. Increased

wobble of the earth on axis by ~ 6.7 inches.

slide8

3/11/2011

2:46 pm Magnitude 9 earthquake

03:41 pm Tsunami. Diesel Generators lost

6:00 pm Unit 1 Reactor Vessel Pressure Increase

7:00 pm Evacuation to 3 km – Dai-ichi

03/12/2011

05:44 am – Evacuation to 10 km

09:00 am – Unit 1 Venting

3:36 pm – Unit 1 Explosion

5:30 pm – Evacuation to 10 km – Dai-ni

6:45 pm – Evacuation to 20 km – Dai-ichi

8:00 pm – Unit 1 Seawater injection

slide9

03/13/2011

09:20 am – Unit 3 Vented to reduce pressure

11:00 am – Unit 3 Hydrogen Explosion

03/15/2011

01:25 am – Unit 2 RCIC fails

06:00 am – Unit 4 Explosion & fire

06:10 am – Unit 2 Suppression Pool explosion

09:38 am – Unit 4

11:00 am – Shelter 20-30 km - Daichi

03/16/2013

05:45 – Unit 4 Fire

All workers briefly leave site due to high doses

slide10

Fukushima Dai-ichi

(Site 1)

Unit 1

Unit 4

slide18

Unit 3

Unit 4

slide20

Unit 1 Explosion Sequence

03/12/2011 (3:36 pm)

slide21

Unit 3 Explosion

03/13/2011 (11:00 am)

slide25

August 20, 2013

Unit 5 & 6

9 Temp. Tanks ~158,400 gal. (total)

7 Underground Reservoirs

~ 15,000,000 gal. (total)

~ 264,170 gallons per tank

~ 26,417 gallons per bladder

slide27

fukushima-no-3-Reuters.jpg

Unit 3

Refueling Floor Crane

125 Ton

slide28

Unit 4

Fuel Pool

Support Structure

slide29

Locating accurate information in the first

48 hours was incredibly difficult

The American Nuclear Society was one of the first and best websites

slide31

Significant Nuclear Events

YearReactor Location Event

1957 Windscale (UK) Fire / Operator Error

1961 SL1 (US) Explosion / Operator Error

1975 Browns Ferry (US) Fire / Testing

1979 TMI (US) Core Melt / Operator / INPO

1983 Salem (US) Equipment / Safety Related

1986 Chernobyl (USSR) Design / Control / WANO

1999 Blayais (France) Flooding

2001 WTC (US) Security / External Events

2002 Davis Besse (US) Corrosion / Safety Culture

2003 PAKS (Hungary) Spent Fuel Pool Cooling

2011 Fukushima (Japan) Flooding / Core Melt

2011 10 Plants (Japan) Flooding

slide33

Significant Organizations

NRC - Nuclear Regulatory Commission – Ultimate civilian authority

NEI – Nuclear Energy Institute

INPO – Institute of Nuclear Power Operations

EPRI – Electric Power and Research Institute

WANO – World Association of Nuclear Operators

IAEA – International Atomic Energy Agency

slide34

Post Fukushima Assessments of Note

  • NEI / INPO / EPRI - The Way Forward - U.S. Industry Leadership in Response to Events at the Fukushima Dai-ichi Nuclear Power Plant
  • NRC - Recommendations for Enhancing Reactor Safety in the 21st Century The Near-Term Task Force Review of Insights From The Fukushima Dai-ichi Accident.
  • The National Diet of Japan - Executive Summary of the Interim Report Investigation Committee on the Accidents at Fukushima Nuclear Power Stations of Tokyo Electric Power Company December 26, 2011
  • ANS Nuclear News – Special Report – Fukushima Dai-ichi
slide36

US Nuclear Industry Response

  • Industry initiatives in place before NRC regulations
  • FLEX - Diverse and flexible coping capability. Relies on diverse and multiple emergency assets

FLEX

Diverse and flexible

Portable equipment and strategies

Emergency equipment pre-staged Onsite

Emergency equipment pre-staged Offsite

slide37

Dresden – Portable Berm - FLEX

6 feet

40 foot section

Each 40 foot section contains a rubber bladder that is filled through a pump and water line

slide39

Nuclear Regulatory Commission

Task Force of senior NRC experts

Report issued on July 12, 2011 (Recommendations for Enhancing Reactor Safety in the 21st Century The Near-Term Task Force Review of Insights From The Fukushima Dai-ichi Accident)

No imminent risk from continued operation

Enhancements to safety and emergency preparedness are warranted

12 Recommendations to the NRC Commission

slide41

NRC Regulatory Framework for the 21st Century

  • Recommendation 1

Framework for Defense-in-depth versus Risk

  • Recommendation 2

Reevaluate and upgrade Design-Basis Seismic and Flooding protection at each reactor

  • Recommendation 3

NRC evaluate potential enhancements to prevent or mitigate seismically induced fires and floods (Long Term)

.

slide42

NRC Regulatory Framework for the 21st Century

(continued)

  • Recommendation 4

Strengthen Station Black Out. Design-Basis and Beyond-Design-Basis

  • Recommendation 5

Require Hardened Vents in BWR Mark I and Mark II containments

  • Recommendation 6

Hydrogen control and mitigation inside containment (Longer Term)

slide43

NRC Regulatory Framework for the 21st Century

(continued)

  • Recommendation 7

Spent Fuel Pool makeup and instrumentation

  • Recommendation 8(Ken’s Presentation Area)

Strengthen and integrate emergency response

EOPs / SAMGs / EDMGs

  • Recommendation 9
  • Prolonged Station Blackout and multi-unit events.

.

slide44

NRC Regulatory Framework for the 21st Century

(continued)

  • Recommendation 10

Additional EP topics for multiunit events and prolonged SBO (Longer Term)

  • Recommendation 11
  • EP topics related to decision-making, radiation monitoring, and public education. (Longer term)
  • Recommendation 12

Reactor Oversight Program. More attention on Defense-in-Depth requirements.

.

implementation of recommendations
Implementation of Recommendations

THREE-TIERED PRIORITIZATION

  • Tier 1 Activities
    • Started without unnecessary delay
  • Tier 2 Activities
    • Need further technical assessment
    • dependence on Tier 1 issues
    • availability of critical skill sets
  • Tier 3 Activities
    • Further NRC Staff study
    • Waiting on completion of shorter-term actions
    • Dependent on the critical skill sets
    • Dependent on resolution of NTTF Recommendation 1
slide46

Tier 1

  • Seismic and flood hazard reevaluations
  • Seismic and flood walk downs
  • Station blackout (SBO) regulatory actions
  • Equipment covered under Title 10 of the Code of Federal Regulations (10 CFR) 50.54(hh)(2)
  • Hardened Vents for Mark I and Mark II containments
  • Spent Fuel Pool FP instrumentation
  • Emergency operating procedures, Severe Accident Management Guidelines (SAMGs), and extensive damage mitigation guidelines
  • Emergency preparedness staffing and communications
slide47

Tier 2

  • Spent Fuel Pool (SFP) makeup
  • Emergency preparedness regulatory actions
slide48

Tier 3

  • All items identified as long-term in the NTTF report
  • Ten-year confirmation of seismic and flooding hazards
  • Seismically induced fires and floods
  • Reliable hardened vents for other containment designs
  • Hydrogen control and mitigation
  • EP for prolonged SBO and multiunit events
  • ERDS capability
  • Additional EP topics for prolonged SBO and multiunit events
  • Decision-making /radiation monitoring / public education
  • Reactor Oversight Process modifications. Defense-in depth staff training on severe accidents and SAMGs
slide49

Recommendations for further consideration

  • Filtration of containment vents
  • Instrumentation for seismic monitoring
  • Basis of emergency planning zone size
  • Prestaging of Potassium Iodide beyond 10 miles
  • Transfer of spent fuel to dry cask storage
  • Loss of ultimate heat sink
slide50

IEMA Actions

  • Provided comments on NRC Recommendations
  • Conducted internal assessments
  • Developed Action Plans based on internal assessments
  • Continued monitoring of Fukushima changes in Illinois
  • Continued monitoring of NRC Fukushima task force actions
  • IEMA Nuclear facility Inspection staff has been orientated

to Illinois licensee’s plant specific FLEX Mitigation Plan”

ad