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MONTHYEARML0506803032005-03-0404 March 2005
Second 10-Year Interval - Eleventh Refueling Outage Inservice Inspection Summary
Project stage: Request
ML0515202672005-06-0202 June 2005
6/2/05, Palo Verde, RAI, Potential Impact of Debris Blockage on Emergency Sump Recirculation at Pressurized-Water Reactors
Project stage: RAI
ML0603903502006-02-0909 February 2006
RAI, Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design-basis Accidents at Pressurized-Water Reactors (TAC Nos. MC4702, MC4703, and M4704)
Project stage: RAI
ML0735310952007-12-10010 December 2007
Request for Extension to Complete the Final Confirmatory Testing, Analysis and Validation of Containment Sump Strainers Associated with NRC Generic Letter 2004-02
Project stage: Request
ML0817002812008-06-0606 June 2008
Request for Extension to Complete the Final Confirmatory Analysis and Validation of Containment Sump Strainers Associated with NRC GL-04-002
Project stage: Request
ML0818206392008-06-30030 June 2008
Approval of Extension Request for Corrective Actions Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors
Project stage: Other
ML0832503462008-11-14014 November 2008
E-Mail Response Re Licensees Request for Extension to Revised Supplemental Response to Generic Letter 2004-02
Project stage: Other
ML0833701622008-11-14014 November 2008
Notification and Concurrence of Extension for Submittal of the Revised Supplemental Response to NRC Generic Letter 2004-02
Project stage: Request
ML0832309372008-12-0303 December 2008
Extension Request for Submittal of the Revised Supplemental Response to Generic Letter 2004-02
Project stage: Other
ML0834305492008-12-16016 December 2008
Request for Additional Information Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized Water Reactors
Project stage: RAI
ML1000706512010-01-0707 January 2010
Request for Additional Information Related to NRC Generic Letter 2004-02
Project stage: RAI
ML1000706482010-01-0707 January 2010
Email Request for Additional Information Related to NRC Generic Letter 2004-02
Project stage: RAI
ML15156B3522015-06-0404 June 2015
Draft Slides for Public Meeting with Arizona Public Service Company Ongoing Resolution of Generic Letter 2004-02 for Palo Verde Nuclear Generating Station, Units 1, 2, and 3
ML15236A1342015-08-26026 August 2015
Presentation Slides for Public Meeting with Arizona Public Service Generic Letter 2004-02 for Palo Verde Nuclear Generating Station, Units 1, 2, and 3
Project stage: Meeting
ML15239B3222015-09-0909 September 2015
Summary of Public Meeting Via Conference Call with Arizona Public Service Company Regarding Ongoing Resolution of Generic Letter 2004-02 for Palo Verde, Units 1, 2, and 3
Project stage: Meeting
ML15268A1312015-10-0505 October 2015
Summary of Public Meeting Via Conference Call with Arizona Public Service Company Regarding Ongoing Resolution of Generic Letter 2004-02 for Palo Verde, Units 1, 2, and 3
Project stage: Meeting
ML15348A0542015-12-15015 December 2015
Slides for December 17, 2015 Public Meeting with APS on Resolution of GL 2004-02
Project stage: Meeting
2008-06-30
[Table View] |
"Draft Meeting" is not in the list (Request, Draft Request, Supplement, Acceptance Review, Meeting, Withholding Request, Withholding Request Acceptance, RAI, Draft RAI, Draft Response to RAI, ...) of allowed values for the "Project stage" property.
Text
Palo Verde Nuclear Generating Station Generic Letter 2004-02 Microtherm Insulation June 10, 2015
Introduction Tom Weber Department Leader Nuclear Regulatory Affairs
=
Background===
- 4/15/2015 - PVAR 4644513 documents that APS failed to identify and evaluate Microtherm on the Reactor Vessel 3
Microtherm Location
~15 Feet Microtherm
~9.5 Feet
~15 Feet
~48.5 Feet 4
Microtherm Location 5
Break Locations Limiting Break Location Hot Leg Nozzle Steam Generator Possible Reactor Vessel (RV) Microtherm break locations 6
Potential Outcomes for Path Forward
- 1. Demonstrate Reactor Vessel break is not limiting
- 2. Remove Insulation
- 3. Justify current configuration Risk Informed Approach Further Evaluation / Testing 7
Break Location Fiber Comparison Limiting Break Location Microtherm Break Location Additional Fiber Latent Fiber
- Based on industry testing Microtherm will block flow on a fibrous thin bed
- In the absence of fiber, Microtherm will act as particulate and flow through open strainer areas 8
Palo Verde Strainer Configuration 9
Palo Verde Pocket During Testing 10
Summary
- 3rd Party Vendor to evaluate Microtherm break
- Decision Point will be August timeframe
- Corrective Action Program will address extent of condition
12 We SAFELY and efficiently generate electricity for the long term
