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| {{#Wiki_filter:Trade Trade--Off Between Tank Off Between Tank Vortexing Vortexing Mi MidECCS dECCSFti Fti M arg i n M arg i n an d ECCS an d ECCS F unc ti on F unc ti on VolumeControlTank VolumeControlTank Volume Control Tank Volume Control Tank Refuelin g Water Tank Refuelin g Water Tank g | | {{#Wiki_filter:Trade-Off Between Tank Vortexing Trade-M i and Margin d ECCS Function F ti Volume Control Tank Refueling g Water Tank Containment Recirculation Sump NRC Meeting On Vortexing Anderson Lin April 18 18, 2013 Diablo Canyon Power Plant (805) 545-4286 Axle@pge.com |
| g Containment Recirculation Sump
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| Containment Recirculation Sump NRC Meeting On VortexingApril182013Anderson LinDiabloCanyonPowerPlant April 18 , 2013 Diablo Canyon Power Plant (805) 545-4286 Axle@pge.com TransferFromVCTtoRWSTTransferFromVCTtoRWST Transfer From VCT to RWST Transfer From VCT to RWSTUpon"S"signalCCPsuctionsarealignedto Upon"S"signalCCPsuctionsarealignedtoUpon S signal , CCP suctions are aligned to Upon S signal , CCP suctions are aligned to the RWST the RWST RWSTwaterlevelisatthehighestto RWSTwaterlevelisatthehighestto RWST water level is at the highest to RWST water level is at the highest to compress any entrained gas from the VCTcompress any entrained gas from the VCT CCPsareboostedbytheRWSTstatichead CCPsareboostedbytheRWSTstatichead CCPs are boosted by the RWST static head CCPs are boosted by the RWST static head CCPs are multi
| | Transfer From VCT to RWST Upon S S signal, signal CCP suctions are aligned to the RWST RWST water level is at the highest to compress any entrained gas from the VCT CCPs are boosted by the RWST static head CCPs are multi-multi-stage pumps tolerate void well (recent tests and Roadmap Report) |
| | If VCT level were increased to prevent any vortex less VCT volume available for charging vortex, |
| | & letdown inventory control and H2 control |
|
| |
|
| CCPs are multi--stage pumps tolerate void well stage pumps tolerate void well (recenttestsandRoadmapReport)
| | Transfer From the RWST to Sump Transfer From the RWST to Sump For a 40 40 diameter RWST RWST, its it is |
| (recenttestsandRoadmapReport)(recent tests and Roadmap Report)(recent tests and Roadmap Report)
| | ~9,400 gal/ft. |
| If VCT level were increased to prevent any If VCT level were increased to prevent any vortexlessVCTvolumeavailableforcharging vortexlessVCTvolumeavailableforcharging vortex , less VCT volume available for charging vortex , less VCT volume available for charging & letdown inventory control and H2 control& letdown inventory control and H2 control TransferFromtheRWSTtoSumpTransferFromtheRWSTtoSump Transfer From the RWST to Sump Transfer From the RWST to Sump TransferFromtheRWSTtoSumpTransferFromtheRWSTtoSump Transfer From the RWST to Sump Transfer From the RWST to SumpFora40'diameterRWSTitsitisFora40'diameterRWSTitsitisFor a 40 diameter RWST , its it is For a 40 diameter RWST , its it is ~9,400 gal/ft. ~9,400 gal/ft.
| | A conservative 9 requirement to prevent vortexing p g quarantines q 84,000 |
| A conservative 9' requirement to A conservative 9' requirement to p revent vortexin g q uarantines p revent vortexin g q uarantines 84 | | , |
| , 000 84 , 000 pgq pgq , | | gallon of RWST inventory |
| , gallon of RWST inventory
| |
|
| |
|
| gallon of RWST inventory TransferFromtheRWSTtoSumpTransferFromtheRWSTtoSump Transfer From the RWST to Sump Transfer From the RWST to SumpRWSTinventoryisrelieduponforcoreRWSTinventoryisrelieduponforcoreRWST inventory is relied upon for core RWST inventory is relied upon for core cooling and containment cooling and containment depressurization
| | Transfer From the RWST to Sump RWST inventory is relied upon for core cooling and containment depressurization If too much RWST inventory was reserved to prevent vortexing vortexing, EOP setpoint revision Reduce credited core delta BTU transfer Increase containment post LOCA P / T |
|
| |
|
| depressurization depressurization
| | Transfer From the RWST to Sump RWST inventory is credited to submerge sump screens Without submerge the sump screens, screen performance would change from pipe pipe flow to channel channel flow Flowrate through the screen relies on water t llevell drops d inside i id the th screen Lowered the water level inside the sump screen creates even worse vortexing concerns to pump suctions |
|
| |
|
| depressurization If too much RWST inventory was
| | Transfer From the RWST to Sump RWST inventory to deliver boron for sump pH control Sump pH must beb maintained d 8.0 - 9.5 Too much RWST inventory quarantined in the RWST could result in higher pH Post LOCA equipment qualification may need to be revised |
|
| |
|
| If too much RWST inventory was reservedtopreventvortexing reservedtopreventvortexing reserved to prevent vortexing , reserved to prevent vortexing ,
| | What Would Be A Reasonable Permissible Air Ingestion No Void At All ? |
| EOP setpoint revision EOP setpoint revision Reduce credited core delta BTU transfer Reduce credited core delta BTU transfer Increase containment post LOCA P / T Increase containment post LOCA P / T TransferFromtheRWSTtoSumpTransferFromtheRWSTtoSump Transfer From the RWST to Sump Transfer From the RWST to SumpRWST inventory is credited to submerge
| | Minimal Sporadic Ingestion ? |
| | |
| RWST inventory is credited to submerge sump screens
| |
| | |
| sump screens Withoutsubmergethesumpscreens, Withoutsubmergethesumpscreens, Without submerge the sump screens, Without submerge the sump screens, screen performance would change from screen performance would change from "pipe"flowto"channel"flow"pipe"flowto"channel"flow pipe flow to channel flow pipe flow to channel flow Flowrate through the screen relies on Flowrate through the screen relies on tlldiidth tlldiidth wa t er l eve l d rops i ns id e th e screen wa t er l eve l d rops i ns id e th e screen Lowered the water level inside the sump Lowered the water level inside the sump screen creates even worse vortexin g screen creates even worse vortexin g concerns to pump suctions concerns to pump suctions TransferFromtheRWSTtoSumpTransferFromtheRWSTtoSump Transfer From the RWST to Sump Transfer From the RWST to SumpRWSTinventorytodeliverboronforRWSTinventorytodeliverboronforRWST inventory to deliver boron for RWST inventory to deliver boron for sump pH control sump pH control bd bd Sump pH must b e maintaine d 8.0 Sump pH must b e maintaine d 8.0 -
| |
| -9.5 9.5 Too much RWST inventory quarantined in
| |
| | |
| Too much RWST inventory quarantined in the RWST could result in hi g her pHthe RWST could result in hi g her pH PostLOCAequipmentqualificationmay PostLOCAequipmentqualificationmay Post LOCA equipment qualification may Post LOCA equipment qualification may need to be revised need to be revised What Would Be A Reasonable What Would Be A Reasonable Permissible Air Ingestion
| |
| | |
| Permissible Air Ingestion NoVoidAtAll?
| |
| NoVoidAtAll?
| |
| No Void At All ?No Void At All ? | |
| MinimalSporadicIngestion?
| |
| MinimalSporadicIngestion?
| |
| Minimal Sporadic Ingestion ?Minimal Sporadic Ingestion ? | |
| 2% ?
| |
| 2% ? | | 2% ? |
| 3% ? | | 3% ? |
| 3% ?
| |
| Continuous 1% ?
| |
| Continuous 1% ? | | Continuous 1% ? |
| What is the reasonable air ingestion ?
| |
| What is the reasonable air ingestion ?}} | | What is the reasonable air ingestion ?}} |
|
|---|
Category:Slides and Viewgraphs
MONTHYEARML24269A2132024-10-10010 October 2024
End-of-Cycle Meeting Presentation - Oct. 2024
ML24157A0652024-06-13013 June 2024
Jeffs 2024 Workshop Presentation
ML24036A3382024-02-0505 February 2024
Environmental Scoping Meeting for the Diablo Canyon License Renewal Application - February 8 Meeting Slides
ML24030A4672024-01-30030 January 2024
Environmental Scoping Meeting for the Diablo Canyon License Renewal Application - February 1 Meeting Slides
ML23255A0012023-09-13013 September 2023
PG&E Slides for 9/13 Public Meeting Related to Diablo Canyon License Renewal
ML23249A1592023-09-13013 September 2023
License Renewal Application Pre-Application Meeting: September 13, 2023
ML23174A0562023-06-26026 June 2023
Slides for TSTF-505 Pre-Submittal Public Teleconference 6-26-2023
ML23143A0882023-05-24024 May 2023
May 24, 2023, Public Meeting Slides Related to Diablo Canyon License Renewal
ML23143A0952023-05-0303 May 2023
May 3, 2023, Diablo Public Meeting Slides for PG&E Presentation
ML23118A0902023-05-0303 May 2023
May 3, 2023, Diablo Public Meeting Slides
ML23079A0452023-03-16016 March 2023
RIC 2023 Slides - Maureen Zawalick TH19
ML22339A1022022-12-0505 December 2022
Pg_E Presentation for NRC Public Meeting
ML22236A5472022-08-24024 August 2022
NRC Slides for Decommissioning Engagement Panel 8-24-2022 Meeting
ML22200A0712022-07-21021 July 2022
Post-Shutdown Decommissioning Activities Report Public Meeting Slides - July 21, 2022
ML22200A0722022-07-21021 July 2022
PG&E Slides for Post-Shutdown Decommissioning Activities Report Public Meeting, Site-Specific Decommissioning Cost Estimate, and Irradiated Fuel Management Plan - July 21, 2022
ML21223A0842021-08-11011 August 2021
Slides for Post Shutdown EP pre-submittal Public Teleconference 8-30-2021
ML20310A2792020-11-0505 November 2020
Slides for Defueled TS Pre-Submittal Public Teleconference November 24, 2020 (L-2020-LRM-0101)
ML21060B1872020-01-26026 January 2020
Enclosure 3 - 1-26-21 Diablo Canyon Renewal pre-app Meeting Slides
ML19233A0722019-08-27027 August 2019
NEIMA Meeting Slides Public
ML18295A0732018-10-24024 October 2018
Final Diablo Canyon Decommissioning Engagement Panel Meeting Oct 24 2018
ML17296A2222017-08-29029 August 2017
Presentation on Reactor Decommissioning for the August 29, 2017 at Congressman Salud Carbajal'S Public Meeting at San Luis Obispo Near Diablo Canyon
ML16335A4392016-11-30030 November 2016
PG&E Reg Conference Presentation - NRC-11152016
ML15232A0102015-08-0404 August 2015
Diablo Canyon Power Plant - Risk-Informed Technical Specification Completion Times (TSTF-505) License Amendment Request: August 4, 2015
ML15216A4112015-08-0404 August 2015
TSTF-505: August 4, 2015 Public Meeting
ML15216A4082015-08-0404 August 2015
Diablo Canyon Power Plant - Risk-Informed Technical Specification Completion Times (TSTF-505) License Amendment Request: August 4, 2015
ML15209A9442015-07-28028 July 2015
June 24, 2015, Summary of Annual Assessment Meeting with Pacific Gas and Electric and Public Open House Regarding Diablo Canyon Power Plant 2014 Performance
ML15202A0982015-07-21021 July 2015
Slides for the August 5, 2015 Diablo Canyon Power Plant License Renewal Application Public Scoping Meeting
ML15117A0692015-04-28028 April 2015
Pacific Gas and Electric Co. April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation
ML15117A2262015-04-28028 April 2015
Nuclear Regulatory Commission April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation
ML15035A0062015-02-0404 February 2015
Meeting Presentation, Diablo Canyon Power Plant Process Protection System Replacement Lessons Learned Using ISG 6 NRC Meeting on Digital I&C.
ML15029A0942015-02-0303 February 2015
Alternate Source Term Pre- Submittal Meeting on February 3, 2015 (TAC Nos. MF5596 and MF5597). AST LAR NRC Meeting Presentation
ML15014A2232015-01-14014 January 2015
Slides Regulatory Conference - January 14, 2015
ML14195A3742014-07-10010 July 2014
Update of Industry Actions Related to Diablo Canyon OE
ML14188A9702014-07-0808 July 2014
14-07-08 ISG-06 Experience Presentation July 8 2014 Digital IC Meeting
ML14155A3742014-06-0404 June 2014
May 22, 2014, Summary of Annual Assessment Meeting with Pacific Gas and Electric Regarding Diablo Canyon Power Plant 2013 Performance
ML14077A2872014-03-18018 March 2014
Transcript of the 612th ACRS Meeting, March 6, 2014 (Open) Pages 1-317
ML13150A1812013-11-19019 November 2013
Trade-Off Between Tank Vortexing Margin and ECCS Function
ML13150A1712013-11-19019 November 2013
1978 - Rhrp Cavitation
ML13274A5142013-10-0202 October 2013
License Slides, 10/2/13 Pre-Application Meeting with Pacific Gas and Electric Company to Discuss Upcoming Structural Weld Overlay Relief Request to Use an Alternative to Disposition Detected Laminar Indications at Diablo Canyon, Unit 2 (TAC
ML13269A0052013-09-26026 September 2013
Licensee Slides for 9/26/13 Meeting to Discuss Amendment Request to Adopt Technical Specifications Task Force TSTF-505, Provide Risk-Informed Extended Completion Times, RITSTF Initiative 4B
ML13268A0022013-09-25025 September 2013
Slide Presentation for 9/25/13 Preapplication Meeting - Use of Leak-before-break for Fuel Structural Analyses and Coolable Geometry
ML13268A0052013-09-24024 September 2013
Slide Presentation for 9/24/13 Pre-application Meeting, Diesel Generator License Amendment Request
ML13159A0092013-06-0404 June 2013
Notable Failures in Nondustructive Testing - June 4, 2013 Public Meeting
ML13066A7402013-03-0707 March 2013
Licensee Slides from 3/7/13 Pre-Application Meeting with Pacific Gas and Electric Company(Tac MF0687 & MF0688)
ML13044A7352013-02-12012 February 2013
Licensee Slides from 2/12/13 Public Meeting to Discuss License Amendment Requests for Degraded Voltage Protection and Control Room Dose Analysis of Record at Diablo Canyon, Units 1 and 2
ML13024A4052013-01-24024 January 2013
Licensee Slides from 1/24/13 Meeting to Discuss Offsite Power
ML13018A1342013-01-15015 January 2013
Pacific Gas and Electric Handouts from January 15, 2013 Meeting Regarding Pending License Amendment Request Related to Diesel Generator Technical Specifications
ML12355A1612012-12-18018 December 2012
PG&E Handouts from the December 18, 2012, Meeting with the NRC Related to Emergency Core Cooling System Evaluations (TAC Nos. MF0313 and MF0315)
ML12311A0492012-09-18018 September 2012
Part 26 Public Meeting NEI Presentation Slides
ML12226A2552012-08-0707 August 2012
License Slides from 8/7/12 Meeting with Pacific Gas and Electric Regarding Future License Amendment Associated with Diesel Generator Technical Specifications
2024-06-13
[Table view] |
Text
Trade-Off Between Tank Vortexing Trade-M i and Margin d ECCS Function F ti Volume Control Tank Refueling g Water Tank Containment Recirculation Sump NRC Meeting On Vortexing Anderson Lin April 18 18, 2013 Diablo Canyon Power Plant (805) 545-4286 Axle@pge.com
Transfer From VCT to RWST Upon S S signal, signal CCP suctions are aligned to the RWST RWST water level is at the highest to compress any entrained gas from the VCT CCPs are boosted by the RWST static head CCPs are multi-multi-stage pumps tolerate void well (recent tests and Roadmap Report)
If VCT level were increased to prevent any vortex less VCT volume available for charging vortex,
& letdown inventory control and H2 control
Transfer From the RWST to Sump Transfer From the RWST to Sump For a 40 40 diameter RWST RWST, its it is
~9,400 gal/ft.
A conservative 9 requirement to prevent vortexing p g quarantines q 84,000
,
gallon of RWST inventory
Transfer From the RWST to Sump RWST inventory is relied upon for core cooling and containment depressurization If too much RWST inventory was reserved to prevent vortexing vortexing, EOP setpoint revision Reduce credited core delta BTU transfer Increase containment post LOCA P / T
Transfer From the RWST to Sump RWST inventory is credited to submerge sump screens Without submerge the sump screens, screen performance would change from pipe pipe flow to channel channel flow Flowrate through the screen relies on water t llevell drops d inside i id the th screen Lowered the water level inside the sump screen creates even worse vortexing concerns to pump suctions
Transfer From the RWST to Sump RWST inventory to deliver boron for sump pH control Sump pH must beb maintained d 8.0 - 9.5 Too much RWST inventory quarantined in the RWST could result in higher pH Post LOCA equipment qualification may need to be revised
What Would Be A Reasonable Permissible Air Ingestion No Void At All ?
Minimal Sporadic Ingestion ?
2% ?
3% ?
Continuous 1% ?
What is the reasonable air ingestion ?
