ML111672121
ML111672121 | |
Person / Time | |
---|---|
Site: | Indian Point |
Issue date: | 06/16/2011 |
From: | Mel Gray Reactor Projects Branch 2 |
To: | |
Gray, Mel NRC/RGNI/DRP/PB2/610-337-5209 | |
Shared Package | |
ML110610687 | List: |
References | |
Download: ML111672121 (27) | |
Text
Indian Point 2 & 3 Annual Assessment Meeting Slides June 16, 2011 ML111672121 1
Indian Point 2 & 3 Assessment Meeting Indian Point 2 & 3 Safety Performance in 2010 U.S. Nuclear Plant Safety in light of Events in Japan Nuclear Regulatory Commission - Region I June 2, 2011 2
Agenda
- Introduction
- Discussion of Indian Point 2/3 safety performance
- Discussion of U.S. nuclear plant safety in light of events in Japan
- NRC to address public questions
- Closing remarks 3
NRC Assessment Summary
- Entergy operated Indian Point 2 & 3 safely and in a manner that preserved the public health and safety and protected the environment
- Licensee Response column of the Action Matrix for each unit
- Baseline inspections planned for each unit in 2011 4
Indian Point 2 Inspection Activities in 2010
- 6460 hours0.0748 days <br />1.794 hours <br />0.0107 weeks <br />0.00246 months <br /> of inspection and related activities
- 2 resident inspectors on site - residents perform inspections daily and can respond to plant events at any time
- 11 regional inspections
- 4 major team inspections
- Triennial Fire Protection
- Initial Operator Licensing Exam
- Problem Identification and Resolution
- Emergency Procedures Exercise 5
Indian Point 2 Performance Indicator and Inspection Results January 1 through December 31, 2010
- All Green Performance Indicators
- 17 Green/Severity Level IV inspection findings
- No greater than Green inspection findings 6
Indian Point 3 Inspection Activities in 2010
- 4980 hours0.0576 days <br />1.383 hours <br />0.00823 weeks <br />0.00189 months <br /> of inspection and related activities
- 2 resident inspectors on site - residents perform inspections daily and can respond to plant events at any time
- 13 regional inspections
- 3 major team inspections
- Initial Operator Licensing Exam
- Emergency Procedure Exercise
- Component Design Bases 7
Indian Point 3 Performance Indicator and Inspection Results January 1 through December 31, 2010
- One White Performance indicator in Initiating Events (1st Qtr)
- All other Performance Indicators Green
- 10 Green inspection findings
- No greater than Green inspection findings 8
Indian Point 2 & 3 NRC Action Matrix Licensee Regulatory Degraded Multiple Repetitive Unacceptable Response Response Cornerstone Degraded Performance Cornerstone All Inputs are 1 or 2 White 2 White or 1 Multiple Yellow Overall Green; Inputs; Yellow Input; Inputs or 1 Red Unacceptable Cornerstone Cornerstone Cornerstone Input; Cornerstone Performance; Objectives Objectives Objectives Met w/ Objectives Met w/ Plants not Fully Met Fully Met Moderate Significant permitted to Degradation in Degradation in Operate w/in this Safety Safety Performance Column; Performance Unacceptable Margin to Safety
- Increasing safety significance
- Increasing NRC inspection efforts
- Increasing NRC/Licensee management involvement
- Increasing regulatory actions
2010 Indian Point 2 & 3 Assessment Summary
- Indian Point 2 & 3 operated safely
- Licensee Response column of the Action Matrix
- Baseline inspections planned for 2011 10
Indian Point 2 & 3 Assessment Meeting U.S. Nuclear Plant Safety in Light of Events in Japan 11
Fukushima: Facts We Know Today
- 9.0 Earthquake
- 4th largest in the world since 1900
- Reactors safely shutdown
- Site then hit by a ~40 foot Tsunami
- Tsunami caused a loss of all electrical power 12
Fukushima: Facts We Know Today
- Loss of all electrical power to safety systems eventually led to fuel damage
- Secondary containment hydrogen explosions visible at Units 1 & 3 several days later
- Radiological releases 13
U.S. Considerations
- No anticipated U.S. health effects from Fukushima
- Methodical and systematic review in progress
- U.S. nuclear plants remain safe
- NRC requires plants to be designed to withstand external events
- NRC requires a defense-in-depth approach
- NRC performs independent safety inspections
- NRC assesses new safety information and requires improvements.
14
U. S. Plants Designed for Site Specific Natural Events
- Tsunamis
- Hurricanes
- Floods
- Tornadoes 15
Indian Point Seismic Considerations
- NRC seismic designs based on ground shaking
- Plants designed to a ground-shaking level appropriate for location
- Design basis considered largest observed earthquake in region in historical times
- Design includes seismic safety margins
- Ramapo fault system taken into account 16
The NRC Requires Defense-In-Depth
- Redundant and diverse safety systems
- Multiple physical barriers to contain radioactive material
- Testing and inspection of systems important to safety
- Emergency planning 17
NRC Independent Safety Inspections Reactor Oversight Program
- NRC inspectors have unfettered access to all plant activities related to nuclear safety and security
- At least two full-time NRC resident inspectors at each nuclear plant
- NRC specialists conduct additional inspections at each nuclear plant 18
NRC Requires Safety Improvements NRC assesses new safety information, develops lessons learned, and requires safety enhancements:
- NRC operating experience program
- Rulemaking (Station Blackout)
- Post TMI Actions
- Post 9/11 Orders
- Generic Safety Issues 19
NRC Response to Events in Japan
- NRC response & assistance to Japanese government
- NRC conducting a methodical and systematic review
- Near-term actions (~90 days)
- conducted additional inspections
- identifying near term operational issues
- Longer-term actions 20
NRC Near-Term Review
- Evaluate Fukushima Daiichi Events
- Domestic operating reactors and spent fuel pools
- Staff briefed the Commission in a public meeting on May 12
- Next briefing scheduled for June 16
- Final recommendations in public meeting July 19 21
NRC Long-Term Review
- Sequence of events and the status of equipment during the event
- Evaluate all technical and policy issues
- Evaluate potential interagency issues
- Applicability of lessons learned to non-operating reactor and non-reactor facilities
- Report to the Commission within 6 months from the start of the evaluation 22
Emergency Planning Zones and Protective Action Recommendations
- Limited and uncertain data was available
- Significant challenges to 3 units and at least 2 spent fuel pools on site
- Potential for large offsite release existed
- Elevated dose rates on site presented challenges to crews attempting to stabilize reactor
- Limited offsite data suggested serious damage to fuel
- Winds shifting from out to sea to land 23
NRC Actions to Date
- Information Notice 2011-05, Tohoku-Taiheiyou-Oki Earthquake Effects on Japanese Nuclear Power Plants
- Emergent NRC Inspections in Response to Fukushima Events
- Bulletin 2011-01, Mitigating Strategies
- Task force established 24
Summary
- Safety of current facilities remains top priority
- The NRC will continue to perform a systematic and methodical review of the Fukushima event
- The NRC will take action based on results of the review to ensure the continued safety of U.S. commercial nuclear power plants 25
Meeting Ground Rules
- 1. Please be respectful to the speaker - only one speaker at a time
- 2. See NRC staff if you have procedural questions/concerns or still want to sign up.
- 3. NRC staff members will be available after the meeting to talk to those interested 26
Questions 27