ML18319A139
| ML18319A139 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 11/14/2018 |
| From: | NRC Region 4 |
| To: | |
| References | |
| Download: ML18319A139 (79) | |
Text
U.S. Nuclear Regulatory Commission Public Meeting Summary November 14, 2018
Title:
San Onofre Nuclear Generating Station Special Inspection Webinar Meeting Identifier: Webinar #769-161-763 Date of Meeting: Thursday, November 8, 2018 Location: Webinar Type of Meeting: Category 3 Purpose of the Meeting:
The NRC hosted a virtual public meeting (webinar) to present preliminary observations regarding a special inspection at San Onofre Nuclear Generating Station. The special inspection was conducted to evaluate the August 3, 2018, incident involving a loaded spent fuel storage canister that was misaligned and became stuck on a flange while being lowered into a storage vault. Following the NRC's presentation, staff responded to questions about the inspection.
General Details:
Three NRC staff members participated in the webinar; approximately 10 staff members supported the webinar.
Over 300 individuals participated in the webinar for various amounts of time.
The meeting started at 2 pm CST and ended at approximately 5 pm CST.
Three staff members gave a formal presentation that lasted approximately 30 minutes; after the presentation, the NRC answered questions for approximately 2Y2 hours.
The public participants submitted approximately 500 questions before and during the webinar.
The webinar was recorded and will be placed on the NRC website for public review when it is available.
Answers to selected questions that were asked during the webinar will be placed on the NRC website.
Summary of Presentations:
Three NRC staff members formally presented the details of the special inspection that was conducted at the San Onofre Nuclear Generating Station site from September 10-14, 2018. The formal presentation included a summary of the incident, including
U.S. Nuclear Regulatory Commission Public Meeting Summary November 14, 2018
Title:
San Onofre Nuclear Generating Station Special Inspection Webinar Meeting Identifier: Webinar #769-161-763 Date of Meeting: Thursday, November 8, 2018 Location: Webinar Type of Meeting: Category 3 Purpose of the Meeting:
The NRC hosted a virtual public meeting (webinar) to present preliminary observations regarding a special inspection at San Onofre Nuclear Generating Station. The special inspection was conducted to evaluate the August 3, 2018, incident involving a loaded spent fuel storage canister that was misaligned and became stuck on a flange while being lowered into a storage vault. Following the NRC's presentation, staff responded to questions about the inspection.
General Details:
Three NRC staff members participated in the webinar; approximately 10 staff members supported the webinar.
Over 300 individuals participated in the webinar for various amounts of time.
The meeting started at 2 pm CST and ended at approximately 5 pm CST.
Three staff members gave a formal presentation that lasted approximately 30 minutes; after the presentation, the NRC answered questions for approximately 2Y2 hours.
The public participants submitted approximately 500 questions before and during the webinar.
The webinar was recorded and will be placed on the NRC website for public review when 'it is available.
Answers to selected questions that were asked during the webinar will be placed on the NRC website.
Summary of Presentations:
Three NRC staff members formally presented the details of the special inspection that was conducted at the San Onofre Nuclear Generating Station site from September 10-14, 2018. The formal presentation included a summary of the incident, including
MEETING AGENDA ADAMS Accession ML18302A351 )
October 29, 2018
Title:
San Onofre Nuclear Generating Station (SONGS) Special Inspection Webinar Date(s) and Time(s): November 08, 2018, 02:00 PM to 05:00 PM Location:
Category:
Purpose:
Contact:
Webinar This is a Category 3 meeting. Public participation is actively sought for this meeting to fully engage the public in a discussion of regulatory issues.
The U.S. Nuclear Regulatory Commission (NRC) will host a virtual public meeting (webinar) to present preliminary observations regarding a Special Inspection at SONGS.
The Special Inspection was conducted to evaluate an August 3 incident involving a loaded spent fuel storage canister that was misaligned and became stuck on a flange while being lowered into a storage vault. Following the NRC's presentation, staff will respond to questions about the inspection.
Eric Simpson 817-200-1553 eric.simpson@nrc.gov
Participants:
NRC Webinar:
Docket No:
Comments:
Troy Pruett, DNMS Director, Region IV Linda Howell, DNMS Deputy Director, Region IV Eric Simpson, Health Physicist, Region IV Patricia Silva, Branch Chief DSFM, NRC Staff URL https://attendee.gotowebinar.
com/register/325663643729566723 05000206 05000361 05000362 07200041 Meeting Number None Password N/A Interested members of the public should register for the webinar via the internet address provided above. After registering, a confirmation email will be sent with details for joining the webinar. During the meeting, participants will be able to see and hear NRC staff on their computer or mobile device. There is also an option to join via phone bridge, but participants must register for the webinar to obtain the call-in number. Public participation will be supported in listen only mode. Meeting slides will be posted on the NRC's public meeting web page in advance. Additional information regarding the San Onofre Nuclear Generating Station Special Inspection can be found at:
PUBLIC MEETING AGENDA
San Onofre Nuclear Generating Station (SONGS) Special Inspection Webinar November 08, 2018, 02:00 PM to 05:00 PM Webinar Time Topic Speaker 2:00 PM - 5:00 PM Opening Remarks and Introductions Troy Pruett 2:00 PM - 5:00 PM NRC Presentation Troy Pruett Linda Howell Eric Simpson 2:00 PM - 5:00 PM Questions and Discussions All 5:00PM Closing Remarks Troy Pruett
The time of the meeting *is local to the jurisdiction where the meeting is being held.
The NRC provides reasonable accommodation to individuals with disabilities where appropriate. If reasonable accommodation is needed to participate in this meeting, or if a meeting notice, transcript, or other information from this meeting is needed in another format (e.g., Braille, large print), please notify the NRC meeting contact.
Determinations on requests for reasonable accommodation will be made on a case-by-case basis.
ADAMS Accession Number: ML18302A351 Distribution:
RidsOeManCenter Resource RldsSecyMallCenter Resource RidsEdoMailCenter Resource RldsOiMallCenter Resource RldsNmssOd Resource RldsOcaMellCenter Resource EOO_Menagers RidsRgn1MallCenter Resource RldsNmssOd Resource RldsOlgMallCenter Resource RldsOcfoMailCenter Resource RklsRgn3MallCenter Resource RldsOpaMail Resource Unda.Howell@nrc.gov Lee.Brookhart@nrc.gov Chris.Smi1b@nrc.gov John.Knunu@nrc.gov Janet.Staub@nn:.gov Michael.Laylon@nn:.gov Marlonc.Davis@nre.gov Angel.Morcno@nrc.gov R4DNMS_FCDB Name JFKatanic Office DNMS Date 10/24/2018 Kriss.Kennedy@nrc.gov Janine.Katanlc@nrc.gov RMdy.Erickacn@nn:.gov BiltMaier@:mrc.gov Victor.Dricks@nrc.gov Dan.llCtBeruuder@nrc.gov Aicla.Rivcra-Varona@nn:.gov Micbele.Burgess@nrc.gov Jcany.Wcil@nn:.go,*
VLDricks ORA 10/25/2018 Scott.Morris@nre.gov l!ric.Simpson@nrc.gov Jackie.Cook@mc.gov Michael Vasquez@mc.gov Emeslinl'.Clay@nrc.gov Micbael.Bloodgood@nrc.gov Polricia.Silva@nre.gov Christopher.Cook@nrc.gov David.Mclntyre@nrc.gov GMVasquez ACES 10/25/2018 OFFICIAL RECORD COPY WAMaier RSLO 10/25/2018 Link to meeting details: https://www.nrc.gov/pmns/mtg?do=details&Code=20181145 Commission's Policy Statement on "Enhancing Public Participation in NRC Meetings" 67 Federal Register 36920, May 28, 2002 The policy statement may be found on the NRC website http://www.nrc.gov/reading-rm/doc-collections/commission/policy/67fr36920.html TWPruett DNMS 10/29/2018
PRESENTATION SLIDES DISTRIBUTED PRIOR TO THE MEETING (ADAMS Accession ML18312A118)
US.NRC United States Nuclear Regulatory Com.mission Protecting People and the Environment San Onofre Special Inspection Webinar November 8, 2018 NRC Region IV, Arlington, TX
Logistics
~~US.NRC United States Nuclear Regulatory Con:unission Protecting People and tl,e Envlronnient
- Webinar Format
- Back-up Bridge Line (888) 469-1677, Passcode 2471451
- Questions and Answers 2
NRC Staff
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Protecting People and tl,e Environnient
- Eric Simpson, Special Inspection Team Leader Region IV Fuel Cycle and Decommissioning Branch
- Patricia Silva, Branch Chief Division of Spent Fuel Management
- Troy Pruett, Director Region IV Division of Nuclear Materials Safety 3
Webinar Agenda
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- Background
- Canister Downloading Operations
- Inspection Team Findings
- Current Status
- Summary
- Questions & Answers 4
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What Happened on August 3rd?
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What Happened on August 3rd?
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What Happened on August 3rd?
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What Happened on August 3rd?
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Post Event Actions
-~ US.NRC United States Nuclear Regulatory Commission Protecting People and the Environment
- Spent Fuel Handling Activities Suspended
- NRC Inspection Activities
- San Onofre Notification to NRC
- Causal Evaluations
- Corrective Actions 22
Spent Fuel Handling Activities Suspended
~U S.NRC United States Nuclear Regulatory Commission Protecting People and the Environment
- MPC 29 lowered into vault
- San Onofre suspends fuel loading
- MPC 30 Inside Transfer Cask
- Seismically Restrained in Fuel Building 23
NRC Inspection Activities
,~~~ US.NRC United States Nuclear.Regulatory CommiSttion Protecting People and the Environnrent
- August 5th: NRC Region IV informally notified of Misalignment Event and initiates daily oversight communications
- August 7th: San Onofre commits to NRC review before resuming operations
- August 17th: NRC decides to conduct Special Inspection
- September 10-14: NRC Special Inspection Team onsite
- NRC to perform inspection prior to resumption of fuel loading 24
NRC Inspection Activities
- 2 Preliminary Escalated Findings
- Failure to provide redundant drop protection
- Failure to report
- 3 Preliminary Severity Level IV Violations
- Procedures
- Corrective actions
- Training
- Management Oversight Weaknesses
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Protecting People and the Environment 25
Causal Evaluations f~~~ US.NRC United States Nuclear Regulatory Commission
.Protecting People and the Environment
- San Onofre Apparent Cause Evaluation
- Holtec Root Cause Analysis
- Common Cause Evaluation 26
Root Causes
- San Onofre Management failed to provide
-Adequate procedures
- Adequate training to support procedure
-Adequate oversight c~ US.NRC United States Nuclear Regulatoty Commission Protecting People and tl,e Environn,ent 27
Corrective Actions
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Protecting People and the Environment
- Training Requirements
- Procedure Enhancements
- Equipment Enhancements
- Oversight Improvements 28
Event Significance
~ US.NRC United States Nuclear :Regulatory Commission Protecting People and the Environnient
- No Actual Drop of Canister
- No Radiological Release
- Load Drop Analysis (if canister fell) 29
Next Steps US.NRC United States Nuclem: ltegulatoty Commission
.Protecting People and the Environment
- Issue NRC Inspection Report
- NRC Inspection of Causal Analyses
- N RC Inspection of Corrective Actions 30
Summary
~US.NRC United States Nuclear Regulatory Commission Protecting People and the Environment
- Could have been prevented
- Weaknesses in management oversight
- Multiple failed barriers
- Increased NRC oversight 31
Questions
~~,~ U S.NRC United States Nuclear.Regulatory Commission Protecting People and the Environment 32
PRESENTATION SLIDES AS PRESENTED DURING MEETING (ADAMS Accession ML18318A064)
,~ us.NRc United States Nuclear Regulatoi:y Commission Protecting People and t.he Bn.,ironment San Onofre Special Inspection Webinar November 8, 2018 NRC Region IV, Arlington, TX
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- Webinar Format
- Back-up Bridge Line (888) 469-1677, Passcode 2471451
- Questions and Answers 2
NRC Staff
-,~us.NRC United States Nuclear Regulatory Commission Protecting People and the Environment
- Eric Simpson, Special Inspection Team Leader Region IV Fuel Cycle and Decommissioning Branch
- Patricia Silva, Branch Chief Division of Spent Fuel Management
- Troy Pruett, Director Region IV Division of Nuclear Materials Safety 3
Webinar Agenda XU S.NRC United States Nuclear Regulatory Commission
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- Background
- Canister Downloading Operations
- Inspection Team Findings
- Current Status
- Summary
- Questions & Answers 4
ISFSI Layout Design Holtec UMAX Design
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Downloading: Transporter
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What Happened on August 3rd?
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Post Event Actions z~~ US.NRC United States Nuclear Regulatory Commission
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Protecting 'People and the Environnient
- Spent Fuel Handling Activities Suspended
- NRC Inspection Activities
- San Onofre Notification to NRC
- Causal Evaluations
- Corrective Actions 22
._ z uS.NRC United States Nuclear Regulatory Commission Protecting People and the Environment Spent Fuel Handling Activities Suspended
- MPC 29 lowered into vault
- San Onofre suspends fuel loading
- MPC 30
- Inside Transfer Cask
- Seismically Restrained in Fuel Building 23
NRC Inspection Activities US.NRC United States Nuclear Regulatory Commission Protecting l'eople and the Environment
- August 5th: NRC Region IV informally notified of Misalignment Event and initiates daily oversight communications
- August 7th: San Onofre commits to NRC review before resuming operations
- August 17th: NRC decides to conduct Special Inspection
- September 10-14: NRC Special Inspection Team onsite
- NRC to perform inspection prior to resumption of fuel loading 24
NRC Inspection Activities
- 2 Preliminary Escalated Findings
- Failure to provide redundant drop protection
- Failure to report
- 3 Preliminary Severity Level IV Violations
- Procedures
- Corrective actions
- Training
- Management Oversight Weaknesses
~~ US.NRC United States Nu.clear Regulatory Commission
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Causal Evaluations e:~~ US.NRC United States Nuclear Regulatory Commission Protecting °People and the Environnrent
- San Onofre Apparent Cause Evaluation
- Holtec Root Cause Analysis
- Comm,on Cause Evaluation 26
Root Causes
- San Onofre Management failed to provide
- Adequate procedures
- Adequate training to support procedure
- Adequate oversight c~ US.NRC United States Nuclear Regulatory Commission Protecting People and the Environnaent 27
Corrective Actions C~>~ US.NRC United States Nuclear Regulatory Commission
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Protecting People and the En.1*ironnient
- Training Requirements
- Procedure Enhancements
- Equipment Enhancements
- Oversight Improvements 28
Event Significance US.NRC United States Nuclear :Regulatory Commission Protecting People and the Environment
- No Actual Drop of Canister
- No Radiological Release
- Load Drop Analysis (if canister fell) 29
Next Steps c~ US.NRC
'United States Nuclear Regulatory Commission Protecting People and the Environment
- Issue NRC Inspection Report
- NRC Inspection of Causal Analyses
- NRC Inspection of Corrective Actions 30
Summary
~~ US.NRC United States Nuclear Regulatory Conu:nissj.on Protecting People and the Environnient
- Could have been prevented
- Weaknesses in management oversight
- Multiple failed barriers
- Increased NRC oversight 31
Questions i US.NRC United States Nuclear Regulatory Commission Protecting People and the Environment 32
,~~ US.NRC United States Nuclear Regulatory Commission Protecting People and the Environment 33
Shims US.NRC United States Nuclear Regulatory Commission Protecting People and the Environnaent Orig.inal Desian: Machined Slots Design Change: Standoffs Pins 34
Radiation Levels on the ISFSI Pad N
Closure Lid ~
7 TS limit on Lid = 0.4 mR/hr TS limit on Outlet Vent = 1.8 mR/hr 6
OUTLET AIR VENT 3
<-"~ U S.NRC United States Nuclear Regulatory Com.mission Protecting People and the Environment Survey Results found by the NRC:
Lids: 0.015 - 0.018 mR/hr Outlet Vents: 0.12 - 0.24 mR/hr INLET AIR VENT Canister #29 levels in Gamma Lid: 0.015 mR/hr Outlet Vent: 0.12 mR/hr 35
Aging Management Plan
~~ US.NRC United States Nuclear Regulatory Com.mission Protecting People and the Environnrent
- Required upon license renewal
- Tracks Degradation of Structures, Systems, and Components
- Concrete
- Steel
- Stainless Steel
- Some licensees have performed Aging Management Inspections
- No breaches of the canisters have been identified
- No chloride induced stress corrosion cracking has been identified
- California Costal Commission Commitment 36
Canister Drop analysis
-~ US.NRC United States Nuclear Regulatory Commission Protecting People and the Environment
- San Onofre provided preliminary analysis
- Analysis under NRC review
- San Onofre preliminary results: no loss of containment 37
Unresolved Item
~:~ US.NRC United States Nuclear Regulatory Com.mission Protecting People and the Environnaent
- Last NRC Inspection report (2017-001) documented an Unresolved Item
- Licensee has modified loading operations to address NRC concern 38
- /~ us.NRC United States Nuclear Regulatory Commission Seismic and Flooding Protecting People and the Environni.ent
- Both ISFSI systems at San Onofre are evaluated for:
- Design Base Earthquake
- Maximum flood height and flood velocity (Tsunami) 39