ML111590130

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NRC Slides - TMI Public Meeting, June 7, 2011
ML111590130
Person / Time
Site: Crane Constellation icon.png
Issue date: 06/08/2011
From: Ronald Bellamy
NRC/RGN-I/DRP/PB6
To:
bellamy, rr
References
Download: ML111590130 (23)
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Three Mile Is land As s es s ment Meeting Three Mile Is land, Unit 1 Safety Performance in 2010 U.S. Nuclear Plant Safety in light of J apan Events 2010 Reactor Overs ight Proces s Nuclear Regulatory Commis s ion - Region I 1

Agenda

  • Introduction
  • Dis cus s ion of Three Mile Is land s afety performance
  • Dis cus s ion of U.S. nuclear plant s afety in light of J apan events
  • NRC to addres s public ques tions
  • Clos ing remarks 2
  • Exelon operated Three Mile Is land s afely and in a manner that pres erved the public health and s afety and protected the environment.
  • Licens ee Res pons e column of the Action Matrix
  • Bas eline ins pections planned for 2011 NRC As s es s ment Summary 3
  • ~3800 hours of ins pection and related activities
  • 2 res ident ins pectors on s ite - res idents perform ins pections daily and can res pond to plant events at any time
  • 13 regional ins pections
  • 3 major team ins pections Permanent Plant Modifications Managing Gas Accumulation Problem Identification and Resolution Three Mile Is land Ins pection Activities in 2010 4
  • All Green Performance Indicators
  • 9 Green/Severity Level IV ins pection findings
  • No greater than Green ins pection findings J anuary 1 through December 31, 2010 Three Mile Is land Performance Indicator and Ins pection Res ults 5

Three Mile Is land NRC Action Matrix Increas ing s afety s ignificance Increas ing NRC ins pection efforts Increas ing NRC/Licens ee management involvement Increas ing regulatory actions Licensee

Response

Regulatory

Response

Degraded Cornerstone Multiple Repetitive Degraded Cornerstone Unacceptable Performance All Inputs are Green; Cornerstone Objectives Fully Met 1 or 2 White Inputs; Cornerstone Objectives Fully Met 2 White or 1 Yellow Input; Cornerstone Objectives Met w/

Moderate Degradation in Safety Performance Multiple Yellow Inputs or 1 Red Input; Cornerstone Objectives Met w/

Significant Degradation in Safety Performance Overall Unacceptable Performance; Plants not permitted to Operate w/in this Column; Unacceptable Margin to Safety

  • Three Mile Is land, Unit 1 operated s afely
  • Licens ee Res pons e column of the Action Matrix
  • Bas eline ins pections planned for 2011 2010 Three Mile Is land As s es s ment Summary 7

Three Mile Is land As s es s ment Meeting U.S. Nuclear Plant Safety in Light of J apan Events 8

Fukus hima: Facts We Know Today

- 4th larges t in the world s ince 1900

  • Reactors Safely Shutdown
  • Site then hit by a ~40 foot Ts unami
  • Ts unami caus ed a los s of all electrical power

Fukus hima: Facts We Know Today

  • Los s of all electrical power to s afety s ys tems eventually led to fuel damage
  • Radiological releas es 10

U.S. Cons iderations

  • No anticipated U.S. Health Effects from Fukus hima
  • U.S. nuclear plants remain s afe

- NRC requires plants to be des igned to withs tand external events

- NRC requires a defens e-in-depth approach

- NRC performs independent s afety ins pections

- NRC as s es s es new s afety information and requires improvements.

  • Methodical and s ys tematic review of Fukus hima event 11

Des igned for Site Specific Natural Events

  • Ts unamis
  • Hurricanes
  • Floods
  • Tornadoes 12

The NRC Requires Defens e-In-Depth

  • Redundant and divers e s afety s ys tems
  • Multiple phys ical barriers to contain radioactive material
  • Tes ting and ins pection of s ys tems important to s afety
  • Emergency planning 13

NRC Independent Safety Ins pections Reactor Overs ight Program

  • NRC ins pectors have unfettered acces s to all plant activities related to nuclear s afety and s ecurity
  • At leas t two full-time NRC res ident ins pectors at each nuclear plant
  • NRC s pecialis ts conduct additional ins pections at each nuclear plant 14

NRC Requires Safety Improvements NRC as s es s es new s afety information, develops les s ons learned, and requires s afety enhancements :

15

  • NRC operating experience program
  • Rulemaking (Station Blackout)
  • Pos t TMI Actions
  • Pos t 9/11 Orders
  • Generic Safety Issues

NRC Res pons e to Events in J apan

  • NRC res pons e & as s is tance to J apanes e government
  • NRC conducting a methodical and s ys tematic review 16
  • Near-term actions (~90 days )

- conducted additional ins pections

- identifying near term operational is s ues

  • Longer-term actions

NRC Near-Term Review

  • Evaluate Fukus hima Daiichi Events
  • Domes tic Operating Reactors and Spent Fuel Pools
  • Staff briefed the Commis s ion in a public meeting on May 12; s econd briefing on J une 16
  • Final recommendations in public meeting J uly 19 17

NRC Long-Term Review

  • Sequence of events and the s tatus of equipment during the event
  • Evaluate all technical and policy is s ues
  • Evaluate potential interagency is s ues
  • Applicability of les s ons learned to non-operating reactor and non-reactor facilities
  • Report to the Commis s ion within 6 months from the s tart of the evaluation 18

NRC Actions to Date

  • Emergent NRC Ins pections in Res pons e to Fukus hima Events

Summary

  • Safety of current facilities remains top priority
  • The NRC will continue to perform a s ys tematic and methodical review of the Fukus hima event
  • The NRC will take action bas ed on res ults of the review to ens ure the continued s afety of US commercial nuclear power plants 20

Meeting Ground Rules

1. Pleas e be res pectful to the s peaker - only one s peaker at a time
2. See NRC s taff if you have procedural ques tions /concerns or s till want to s ign up.
3. NRC s taff members will be available after the meeting to talk to thos e interes ted 21

Ques tions 22

Contacting the NRC

  • Report a s afety concern
  • 1-800-695-7403
  • allegation@nrc.gov
  • General ques tions
  • www.nrc.gov
  • Region I Public Affairs
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