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Category:Slides and Viewgraphs
MONTHYEARML24036A3382024-02-0505 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 ML23118A0902023-05-0303 May 2023 May 3, 2023, Diablo Public Meeting Slides ML23143A0952023-05-0303 May 2023 May 3, 2023, Diablo Public Meeting Slides for PG&E Presentation 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 ML15117A2262015-04-28028 April 2015 Nuclear Regulatory Commission April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation ML15117A0692015-04-28028 April 2015 Pacific Gas and Electric Co. 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 ML13150A1712013-11-19019 November 2013 1978 - Rhrp Cavitation ML13150A1812013-11-19019 November 2013 Trade-Off Between Tank Vortexing Margin and ECCS Function 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 ML12193A1412012-07-25025 July 2012 6/28/2012 Summary of Meeting with Pacific Gas and Electric to Discuss Digital Replacement of Process Protection System at Diablo Canyon, Units 1 and 2 and Presubmittal of TSTF-493 Option B License Amendment Request (TAC ME7522-ME7523, ME851 ML12157A2722012-06-11011 June 2012 5/31/2012 Summary of Telephone Conference with Licensees Regarding Near Term Task Force Recommendation 2.1 Seismic Reevaluations - Diablo Canyon, 1 and 2, San Onofre, Units 2 and 3, Columbia Generating Station, and Palo Verde, Units 1, 2, a 2024-02-05
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Simplified Equation for Gas Transport To Pumps NEI Workshop January 21, 2010 Anderson Lin / Diablo Canyon Power Plant Steve Swantner / Westinghouse
What Factors Could Result In Gas Generation ?
PWROG Projects Simplified Gas Transport Equation Void Transport (WCAP-16631 for 6 & 8)
On Going 4 & 12 @ Purdue
- Transport Buffers Pipe p Hangers g
- Scaling of models Relief Valves
Non-Condensable Gas into the Pump Interim Gas Ingestion Reactor Vessel Tolerance Criteria (V-EC-1866)
(OG-08-293)
- LOCA & Non-LOCA Qualitative Evaluation
- Peak / Average Void Fraction
- Momentary TDH Degradation
Gas Transport vs. Flow Rate Observation 1: Higher flow results in higher void fraction (over a shorter duration) being transported
Test Loop at Purdue: Video Locations Top Horizontal Top Vertical Bottom Vertical Bottom Horizontal
Gas Transport vs. Flow Rate Observation 2: Larger initial void volume results in larger void Fraction being transported
Identify Critical Parameters zObservations:
{Higher flow Higher Void
{Larger initial void volume Higher Void zMinimizing Void Transport to The Pump
{Identify the maximum flow rate
{Limit the allowable initial void
Simplified Equation vs. APC Criteria Gas Transport vs. Flow Rate
{ Limit the allowable initial void Simplified Equation To Limit The Initial Void (Easy For Plant Implementation)
V allowable = Q max X X t X ( Pp/P1)
V allowable : Determines the Void Fraction
( If X t = 0 No void at all )
What are the appropriate & t Gas Volume ?
Void Limit vs Pump Tolerance Pump Operability Void Size Type of Pumps &
Cost of Pump Tests
Void Impact To the Pump zPump Performance Considerations
{Relies on incompressible water to do work zHigher Void Fraction (less working fluid) Less TDH
{Void expands as it approaches the eye of the impeller zPtotal = Constant = PStatic + P1/2 V2 = Plocal + Pkinetic z As Pkinetic increases, Plocal decreases Void Vol. Increases
{Plocal >> Pvapor Issue is not NPSHr (cavitation) but a flow passage issue
{Void Fraction To The Pump Must Be Limited
Continuous Pump Test Curve Ref: POWER 2009-81175
Continuous Pump Test Curve
( At least 3 test data points for a test curve)
Ref: NUREG / CR 2792 Atmospheric Suction Pressure
Continuous Pump Test Curve
( At least 3 test data points for a test curve)
Ref: NUREG / CR 2792 50 psig Suction Pressure
Multistage Is More Tolerant Than Single Stage Pump Ref: NUREG / CR 2792
Void Impact To the Pump z A Small, Limited Void Should Be Tolerable
{Pump Curve Typically Breaks Down After 20% -
40% void
{Available Pump Tests Suggest Void Tolerance to 10% - 20% (based on the available suction pressure) zEffect Is a Continuous Degradation of the Pump Curve zThe Pump Will Continue to Operate (No Gas Binding)
Void Impact To the Pump z A Small, Limited Void May Be Tolerable
{ Pump Curve Typically Breaks Down After 20% - 40% Void
{ Available Pump Tests Suggest Void Tolerance Between 10% - 20% (based on the available suction pressure) z Simplified Equation Vallowable = Qmax X X t X ( Pp/P1) z Simplified Equation Conservative Volume
{ No Continuous Void Source in the ECCS
{ Void Passage Through Pump Is A Momentary Condition
{ ECCS Pumps have High Suction Pressure z Injection phase full RWST static head z Recirc. Phase Static head + containment P - screen P
Peak Void from the 6 Loop Test Peak Void from the 12 Loop Test Identify the Maximum Flow Rate ECCS Suction ID Q-max Fr -max Pumps (inch) (gpm)
CCP 6.357 560 1.37 SIP 6.357 670 1.64 HPSI 10.25 1410 1.05 RHRP 12.25 4500 2.14 LPSI 18 5500 1.00
Simplified Equation vs. DSS & APC Figure 6 6 inch 5% initial void fraction RIMP2 ( 11% initial void & Fr=1.9) 0.1 70% < BEP < 120%
0.09 10% for 5 Seconds 0.08 0.07 0.06 Void Fraction F060 F100 0.05 BEP < 70% or > 120 % Most Limiting F190 NRR 0.04 4.8 gallon Total Void Volume 0.03 0.02 0.01 0
0 5 10 15 20 25 30 Time (sec)
Simplified Allowable Void Equation z Static Void < 5% for smaller pipes, <2% for larger pipes z Vallowable = Qmax X X t X ( Pp/P1)
Pipe ID X-Section (Static t Conditions)
< 12 10% 5 second < 5%
> 12 2% 20 second < 2%
Examples of Allowable Void From The Simplified Equation z Static Void < 5% for smaller pipes, <2% for larger pipes z Vallowable = Qmax X X t X ( Pp/P1)
Pumps Q max V allowable X-Section t
CCPs 560 10% 5 second 4.67 gal < 5%
SIPs 670 10% 5 second 5.58 gal < 5%
RHRPs 4500 2% 20 second 30 gal < 2%
HPSI 1800 10% 5 second 12 gal < 5%
LPSI 5500 2% 20 seconds 36 gal < 2%
Purdue -8 psig: 5% 4.8 gal & 10% 9.7 gal
Treatment of the Simplified Equation z Supply Headers with Takeoffs
{Calculate allowable volume for each individual pump suction
{Apply smallest of the allowable branch line limits to the header z Vertical pipe volume > 4 X Void volume z Allowable void accounts for static pressure change between high point and pump suction
{Elevation change must be > 10 feet
Advantages of the Simplified Equation z Simplified Equation is Conservative
{ Limits The Allowable Void Volume
{ Allowable Void volumes < Purdue Tested
{ Not Likely To Gas Bind The Pump
{P id R
{Provides Reasonable bl BBasis i ffor P Pump O Operability bilit
{Reasonable Engineering Judgment
{Enveloped by DSS / APC Void Criteria
{Supported by the Purdue Test Data z Easily Implemented In ECCS Surveillance Acceptance Criteria
{Simple Method to Define Allowable Void Volume