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| | issue date = 10/26/2011 | | | issue date = 10/26/2011 |
| | title = Licensee Handouts from November 1, 2011 Meeting with STP Nuclear Operating Company on GSI-191 | | | title = Licensee Handouts from November 1, 2011 Meeting with STP Nuclear Operating Company on GSI-191 |
| | author name = Howe K J, Leavitt J J, Sande T D, Zigler G L | | | author name = Howe K, Leavitt J, Sande T, Zigler G |
| | author affiliation = ALION Science & Technology Corp, Univ of New Mexico | | | author affiliation = ALION Science & Technology Corp, Univ of New Mexico |
| | addressee name = Singal B K | | | addressee name = Singal B |
| | addressee affiliation = NRC/NRR/DORL/LPLIV | | | addressee affiliation = NRC/NRR/DORL/LPLIV |
| | docket = 05000498, 05000499 | | | docket = 05000498, 05000499 |
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| =Text= | | =Text= |
| {{#Wiki_filter:Risk Informing STP GSI-191 Chemical EffectsRisk Informed GSI-191 Resolution Tuesday, November 1Public Meeting with STP Nuclear Operating Company 1Timothy D. SandeGilbert L. ZiglerDr. Kerry J. Howe Janet J. Leavitt11/1/11 Pre-Licensing Meeting OutlineRisk Informed GSI-191*Meeting Objective*Purpose of Chemical Effects Program | | {{#Wiki_filter:Risk Informing STP GSI-191 Chemical Effects Risk Informed GSI-191 Resolution Tuesday, November 1 Public Meeting with STP Nuclear Operating Company Timothy D. Sande Dr. Kerry J. Howe Gilbert L. Zigler Janet J. Leavitt 11/1/11 Pre-Licensing Meeting 1 |
| *Significant/Insignificant Contributors
| |
| *STPParameters11/1/11 Pre-Licensing Meeting 2
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| *STP Parameters*Previous Tests Relevant to STP
| |
| *Preliminary Ideas for Testing
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| *Preliminary Ideas for Risk Informed Application
| |
| *Conclusions Meeting ObjectiveRisk Informed GSI-191*Present the STP risk informed chemical effects approach to the NRC*Obtain NRC comments prior to developing aninitialtestplan11/1/11 Pre-Licensing Meeting 3 an initial test plan Risk Informed GSI-191*Fully understand physical and chemical phenomenon related to chemical effects at STP
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| through research, testing, and modeling*Develop an anal y tical model for chemical Goals of Risk Informed Chemical Effects Program11/1/11 Pre-Licensing Meeting 4 yprecipitate formation that can be implemented in CASA Grande*Develop an algorithm for chemical effects head loss that can be implemented in CASA Grande*Validate models with prototypical testing Significant ContributorsRisk Informed GSI-191*Time*Buffer
| | Risk Informed GSI-191 Outline |
| *pH*Temperature*Concrete Area
| | * Meeting Objective |
| *Corrosion
| | * Purpose of Chemical Effects Program |
| *Dissolution | | * Significant/Insignificant Contributors |
| *Inhibition11/1/11 Pre-Licensing Meeting 5
| | * STP Parameters |
| *Temperature*Pool Volume | | * Previous Tests Relevant to STP |
| *Insulation Types
| | * Preliminary Ideas for Testing |
| *Insulation Quantities
| | * Preliminary Ideas for Risk Informed Application |
| *Aluminum Area
| | * Conclusions 11/1/11 Pre-Licensing Meeting 2 |
| *Inhibition*Solubility Limits | |
| *Kinetics
| |
| *Precipitate Types
| |
| *Precipitate Properties Significant ContributorsRisk Informed GSI-191*Copper Area*Lead Area
| |
| *Zinc Coatings
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| *AcidFormation*HX Temperature Drop
| |
| *Retrograde Solubility11/1/11 Pre-Licensing Meeting 6
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| *Acid Formation*Concrete Aging
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| *RCS Chemistry
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| *RWST Chemistry Insignificant ContributorsRisk Informed GSI-191*Carbon Steel*Galvanized Steel
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| *Nickel*OrganicMaterial11/1/11 Pre-Licensing Meeting 7
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| *Organic Material*RCS Crud
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| *Radiolysis Products
| |
| *Biological Effects STP ParametersRisk Informed GSI-191*Buffer: TSP*Nominal pH: ~7.6
| |
| *LBLOCA Containment Temperature: 260°F max to120°Fat30days11/1/11 Pre-Licensing Meeting 8 to 120 F at 30 days*LBLOCA Pool Temperature: 267°F max to 126°F at 30 days*Pool Volume: 31,431 ft 3 min, 89,350 ft 3 max*Nominal Spray Duration: 12 hr STP ParametersRisk Informed GSI-191*RCS Chemistry: 1,400 -0 ppm boron, 3.5 -0.4 ppm lithium, 1 -<0.1 ppm Silica*RWST Chemistry: 2,850 -2,975 ppm boron, 1 -6 ppm Silica11/1/11 Pre-Licensing Meeting 9*Pool Chemistry: 2,372 -2,878 ppm boron*Insulation: Nukon, Microtherm (penetrations), SS RMI (reactor cavity)*Coatings: Epoxy, IOZ, Polymide, Alkyd, Enamel | |
| *Nominal Aluminum Area: 5,567 ft 2 | |
| STP Time Dependent pHRisk Informed GSI-19111/1/11 Pre-Licensing Meeting 10 STP Time Dependent TemperatureRisk Informed GSI-191 150°Fat35days11/1/11 Pre-Licensing Meeting 11 150 F at 3.5 days140°F at 7 days Previous Tests Relevant to STPRisk Informed GSI-191*WCAP-16530 (single effects)*WCAP-16785 (partially integrated effects)
| |
| *ICET Test 2 (integrated effects) | |
| *AlionVogtleVuezTests(integratedeffectswith11/1/11 Pre-Licensing Meeting 12 | |
| *Alion Vogtle Vuez Tests (integrated effects with head loss)*Alion Vogtle and Calvert Cliffs High Temperature Vertical Loop (HTVL) Tests (aluminum solubility)
| |
| STP WCAP-16530 PredictionRisk Informed GSI-191Material ReleasedQuantity (kg)Calcium*63.06Silicon208.85Aluminum82.9211/1/11 Pre-Licensing Meeting 13PrecipitateQuantity (kg)
| |
| Sodium Aluminum Silicate649.5Aluminum Oxyhydroxide35.7Calcium Phosphate*162.7*Includes marinite source that is no longer in containment STP WCAP-16785 PredictionRisk Informed GSI-191RefinementAluminum (ppm)NaAlSi 3 O 8 (kg)AlOOH (kg)Ca 3 (PO 4)2 (kg)BaseCase82.9649.5 35.7162.7SiliconInhibition18.3177.40.0162.7PhosphateInhibition69.4649.55.6162.711/1/11 Pre-Licensing Meeting 14 Solubilit yLimits82.90.00.0162.7 ICET Test OverviewRisk Informed GSI-191ICET Test Number Controlling pH buffer systemInsulation (%)Measured pHChemical byproductsVisible at test temperatureVisible upon coolingFiberglassCal-Sil1Borate (NaOH)10009.3 -9.5NoYes2Phosphate (TSP)10007.1 -7.4NoNo3Phosphate (TSP)20807.3 -8.1Yes, only during first few hours No11/1/11 Pre-Licensing Meeting 15hours4Borate (NaOH)20809.5 -9.9NoNo5Borate (Borax)10008.2 -8.5NoYesTest Duration: 30 daysTest Temperature: 140°F Spray Duration: 4 hr Water Chemistry: Boron, lithium hydroxide, hydrochloric acid Comparison to ICET Test 2 InputsRisk Informed GSI-191Material TypeSTP Quantities*Ratio of STPQuantities to Max Pool Volume Ratio of ICET Test 2 Quantities to Tank Volume Ratio ICET/STPAluminum submerged700 ft 20.007834 ft 2/ft 30.179 ft 2/ft 322.8Aluminum exposed to spray6300 ft 20.070509 ft 2/ft 33.34 ft 2/ft 347.411/1/11 Pre-Licensing Meeting 16Fiberglass insulation submerged2385.1 ft 30.026694 ft 3/ft 30.103 ft 3/ft 33.9Mariniteinsulation submerged15.2 ft 30.00017 ft 3/ft 3-0.0Microtherm insulation submerged1.8 ft 32.01E-05 ft 3/ft 3-0.0Concrete submerged5700 ft 20.063794 ft 2/ft 30.015 ft 3/ft 30.2*Quantities are taken from conservative inputs used in STP WCAP calculation, mariniteremoved, concrete only exposed to spray, etc.
| |
| ICET Test ResultsRisk Informed GSI-191 100 150 200 250 300 350 400 450 minum concentration (mg/L)Test 1 unfilteredTest 1 filtered 20 30 40 50 60 70 80 minum concentration (mg/L)Test 5 unfilteredTest 5 filtered11/1/11 Pre-Licensing Meeting 17 0 500102030Alu mTime (days)(a)0 100102030Alu mTime (days)(b)Aluminum concentration below detection limit for Tests 2, 3, 4Aluminum concentration leveled off over time for Tests 1, 5 Inverse trend between aluminum and silicon concentrations Alion Vogtle Vuez Test ResultsRisk Informed GSI-191*Minimal aluminum in solution*No precipitates observed
| |
| *Head loss increased ~15xover30days11/1/11 Pre-Licensing Meeting 18
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| ~1.5x over 30 days , possibly due to effect of
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|
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| fiber bed dissolution (NUREG/CR-6808)Increasing head loss due to Nukon dissolution (reproduced from NUREG/CR-6808 Figure 7-23)
| | Risk Informed GSI-191 Meeting Objective |
| Alion Vogtle and Calvert Cliffs HTVL TestsRisk Informed GSI-191 Vogtle*Buffer: TSP*Aluminum: 4 ppm
| | * Present the STP risk informed chemical effects approach to the NRC |
| *Silica: 26 pp m Calvert Cliffs*Buffer: NaTB | | * Obtain NRC comments prior to developing an initial test plan 11/1/11 Pre-Licensing Meeting 3 |
| *Aluminum: 10 ppm | |
| *Silica: 60 pp m11/1/11 Pre-Licensing Meeting 19 pp*pH: 7.6 -7.8
| |
| *Results: No precipitation at temperatures as low as 128°F pp*pH: 7.4*Results: No precipitation at temperatures as low as 60°F Preliminary Ideas for TestingRisk Informed GSI-191*Perform integrated tests to determine material corrosion/dissolution/release rates and
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|
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| characterize precipitates in order to develop
| | Risk Informed GSI-191 Goals of Risk Informed Chemical Effects Program |
| | * Fully understand physical and chemical phenomenon related to chemical effects at STP through research, testing, and modeling y |
| | * Develop an analytical model for chemical precipitate formation that can be implemented in CASA Grande |
| | * Develop an algorithm for chemical effects head loss that can be implemented in CASA Grande |
| | * Validate models with prototypical testing 11/1/11 Pre-Licensing Meeting 4 |
|
| |
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| thermodynamics and kinetics models11/1/11 Pre-Licensing Meeting 20*Perform benchtop or autoclave tests to further develop database for models*Perform HTVL tests with replicated precipitates and varying debris loads to develop a chemical effects head loss algorithm Test Characterization of PrecipitatesRisk Informed GSI-191*VUEZ tests indicate precipitates form as crystals, with nucleation
| | Risk Informed GSI-191 Significant Contributors |
| | * Time |
| | * Concrete Area |
| | * Buffer |
| | * Corrosion |
| | * pH |
| | * Dissolution |
| | * Temperature |
| | * Inhibition |
| | * Pool Volume |
| | * Solubility Limits |
| | * Insulation Types |
| | * Kinetics |
| | * Insulation Quantities |
| | * Precipitate Types |
| | * Aluminum Area |
| | * Precipitate Properties 11/1/11 Pre-Licensing Meeting 5 |
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| on fiberglass fibers, 11/1/11 Pre-Licensing Meeting 21 rather than amorphous precipitates forming in
| | Risk Informed GSI-191 Significant Contributors |
| | * Copper Area |
| | * HX Temperature Drop |
| | * Lead Area |
| | * Retrograde Solubility |
| | * Zinc Coatings |
| | * Acid Formation |
| | * Concrete Aging |
| | * RCS Chemistry |
| | * RWST Chemistry 11/1/11 Pre-Licensing Meeting 6 |
|
| |
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| the pool as predicted by
| | Risk Informed GSI-191 Insignificant Contributors |
| | * Carbon Steel |
| | * Galvanized Steel |
| | * Nickel |
| | * Organic Material |
| | * RCS Crud |
| | * Radiolysis Products |
| | * Biological Effects 11/1/11 Pre-Licensing Meeting 7 |
|
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| WCAP-16530 Preliminary Ideas for Application to Risk Informed AnalysisRisk Informed GSI-191*Use thermodynamics (and if possible) kinetics models to develop a chemical module for CASA
| | Risk Informed GSI-191 STP Parameters |
| | * Buffer: TSP |
| | * Nominal pH: ~7.6 |
| | * LBLOCA Containment Temperature: 260°F max to 120 120°FF at 30 days |
| | * LBLOCA Pool Temperature: 267°F max to 126°F at 30 days |
| | * Pool Volume: 31,431 ft3 min, 89,350 ft3 max |
| | * Nominal Spray Duration: 12 hr 11/1/11 Pre-Licensing Meeting 8 |
|
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| Grande that can be used to calculate chemical
| | Risk Informed GSI-191 STP Parameters |
| | * RCS Chemistry: 1,400 - 0 ppm boron, 3.5 - 0.4 ppm lithium, 1 - <0.1 ppm Silica |
| | * RWST Chemistry: 2,850 - 2,975 ppm boron, 1 - |
| | 6 ppm Silica |
| | * Pool Chemistry: 2,372 - 2,878 ppm boron |
| | * Insulation: Nukon, Microtherm (penetrations), SS RMI (reactor cavity) |
| | * Coatings: Epoxy, IOZ, Polymide, Alkyd, Enamel |
| | * Nominal Aluminum Area: 5,567 ft2 11/1/11 Pre-Licensing Meeting 9 |
|
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| precipitate types and quantities for any 11/1/11 Pre-Licensing Meeting 22combination of parameters applicable to STP*Develop a chemical effects head loss algorithm that can be incorporated in the head loss module for CASA Grande that is applicable to the ranges of chemical and non-chemical debris
| | Risk Informed GSI-191 STP Time Dependent pH 11/1/11 Pre-Licensing Meeting 10 |
|
| |
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| loads at STP Thermodynamics ModelingRisk Informed GSI-19111/1/11 Pre-Licensing Meeting 230.1 1 10 1001000406080100120140160180200220Solubility Limit forAluminum (mg/L)Temperature (F)pH = 7.0pH = 7.5 Risk Informed GSI-191*Particulate Chemical Precipitate:-NUREG/CR-6224 Head Loss Correlation-Chemical particulate modeled as other particulates, i.e., surface to volume ratio and densityChemical Head Loss Modeling11/1/11 Pre-Licensing Meeting 24*Amorphous Chemical Precipitate:-Develop a bump-up factor algorithm for low amorphous chemical precipitate to fiber loads-Interpolate WCAP-16530 head loss testing results Risk Informed GSI-191*Perform an Integrated 30 day test-Realistic simulation of STP conditions:*Temperature time history*Materials exposed to sprayValidation of Chemical Precipitate Model11/1/11 Pre-Licensing Meeting 25*Submerged material and debris
| | Risk Informed GSI-191 STP Time Dependent Temperature 150°F 150 F at 3.5 3 5 days 140°F at 7 days 11/1/11 Pre-Licensing Meeting 11 |
| *Flow through a fiber bed-Fluid analysis-Weight loss measurements | | |
| -SEM of fiber bed Validation of Chemical Head Loss ModelRisk Informed GSI-191*Perform Vertical Head Loss tests with chemical particulate simulant-Compare Vertical Head Loss test results with NUREG/CR-6224 calculations11/1/11 Pre-Licensing Meeting 26-Wide range of eta (particulate to fiber weight ratio)-Wide range of debris bed thickness ConclusionsRisk Informed GSI-191*Currently available data indicates that chemical effects at STP is far less severe than predicted by the standard WCAP-16530 methodology | | Risk Informed GSI-191 Previous Tests Relevant to STP |
| *A combination of testin g and modelin g can be 11/1/11 Pre-Licensing Meeting 27 ggused to develop a realistic prediction of chemical effects for STP*A chemical module and modified head loss module will need to be implemented into CASA Grande for evaluation of full range of scenarios}} | | * WCAP-16530 (single effects) |
| | * WCAP-16785 (partially integrated effects) |
| | * ICET Test 2 (integrated effects) |
| | * Alion Vogtle Vuez Tests (integrated effects with head loss) |
| | * Alion Vogtle and Calvert Cliffs High Temperature Vertical Loop (HTVL) Tests (aluminum solubility) 11/1/11 Pre-Licensing Meeting 12 |
| | |
| | Risk Informed GSI-191 STP WCAP-16530 Prediction Material Released Quantity (kg) |
| | Calcium* 63.06 Silicon 208.85 Aluminum 82.92 Precipitate Quantity (kg) |
| | Sodium Aluminum Silicate 649.5 Aluminum Oxyhydroxide 35.7 Calcium Phosphate* 162.7 |
| | *Includes marinite source that is no longer in containment 11/1/11 Pre-Licensing Meeting 13 |
| | |
| | Risk Informed GSI-191 STP WCAP-16785 Prediction Refinement Aluminum NaAlSi3O8 AlOOH Ca3(PO4)2 (ppm) (kg) (kg) (kg) |
| | Base Case 82.9 649.5 35.7 162.7 Silicon Inhibition 18.3 177.4 0.0 162.7 Phosphate Inhibition 69.4 649.5 5.6 162.7 Solubility Limits 82.9 0.0 0.0 162.7 11/1/11 Pre-Licensing Meeting 14 |
| | |
| | Risk Informed GSI-191 ICET Test Overview Insulation (%) Chemical byproducts ICET Test Controlling pH Measured pH Visible at test Visible upon Number buffer system Fiberglass Cal-Sil temperature cooling 1 Borate (NaOH) 100 0 9.3 - 9.5 No Yes 2 Phosphate (TSP) 100 0 7.1 - 7.4 No No Yes, only 3 Phosphate (TSP) 20 80 7.3 - 8.1 during first few No hours 4 Borate (NaOH) 20 80 9.5 - 9.9 No No 5 Borate (Borax) 100 0 8.2 - 8.5 No Yes Test Duration: 30 days Test Temperature: 140°F Spray Duration: 4 hr Water Chemistry: Boron, lithium hydroxide, hydrochloric acid 11/1/11 Pre-Licensing Meeting 15 |
| | |
| | Risk Informed GSI-191 Comparison to ICET Test 2 Inputs Ratio of STP Ratio of ICET STP Quantities to Test 2 Ratio Material Type Quantities* Max Pool Quantities to ICET/STP Volume Tank Volume Aluminum submerged 700 ft2 0.007834 ft2/ft3 0.179 ft2/ft3 22.8 Aluminum exposed to spray 6300 ft2 0.070509 ft2/ft3 3.34 ft2/ft3 47.4 Fiberglass insulation submerged 2385.1 ft3 0.026694 ft3/ft3 0.103 ft3/ft3 3.9 Marinite insulation submerged 15.2 ft3 0.00017 ft3/ft3 - 0.0 Microtherm insulation submerged 1.8 ft3 2.01E-05 ft3/ft3 - 0.0 Concrete submerged 5700 ft2 0.063794 ft2/ft3 0.015 ft3/ft3 0.2 |
| | *Quantities are taken from conservative inputs used in STP WCAP calculation, marinite removed, concrete only exposed to spray, etc. |
| | 11/1/11 Pre-Licensing Meeting 16 |
| | |
| | Risk Informed GSI-191 ICET Test Results 450 80 Test 1 unfiltered Test 5 unfiltered Alum minum concentration (mg/L) Alum minum concentration (mg/L) 400 70 Test 1 filtered Test 5 filtered 350 60 300 50 250 40 200 30 150 100 20 50 10 0 0 0 10 20 30 0 10 20 30 (a) Time (days) (b) Time (days) |
| | Aluminum concentration below detection limit for Tests 2, 3, 4 Aluminum concentration leveled off over time for Tests 1, 5 Inverse trend between aluminum and silicon concentrations 11/1/11 Pre-Licensing Meeting 17 |
| | |
| | Risk Informed GSI-191 Alion Vogtle Vuez Test Results |
| | * Minimal aluminum in solution |
| | * No precipitates observed |
| | * Head loss increased |
| | ~1 5x over 30 days |
| | ~1.5x days, possibly due to effect of fiber bed dissolution (NUREG/CR-6808) |
| | Increasing head loss due to Nukon dissolution (reproduced from NUREG/CR-6808 Figure 7-23) 11/1/11 Pre-Licensing Meeting 18 |
| | |
| | Risk Informed GSI-191 Alion Vogtle and Calvert Cliffs HTVL Tests Vogtle Calvert Cliffs |
| | * Buffer: TSP |
| | * Buffer: NaTB |
| | * Aluminum: 4 ppm |
| | * Aluminum: 10 ppm |
| | * Silica: 26 pp ppm |
| | * Silica: 60 pp ppm |
| | * pH: 7.6 - 7.8 |
| | * pH: 7.4 |
| | * Results: No precipitation |
| | * Results: No precipitation at temperatures as low at temperatures as low as 128°F as 60°F 11/1/11 Pre-Licensing Meeting 19 |
| | |
| | Risk Informed GSI-191 Preliminary Ideas for Testing |
| | * Perform integrated tests to determine material corrosion/dissolution/release rates and characterize precipitates in order to develop thermodynamics and kinetics models |
| | * Perform benchtop or autoclave tests to further develop database for models |
| | * Perform HTVL tests with replicated precipitates and varying debris loads to develop a chemical effects head loss algorithm 11/1/11 Pre-Licensing Meeting 20 |
| | |
| | Risk Informed GSI-191 Test Characterization of Precipitates |
| | * VUEZ tests indicate precipitates form as crystals, with nucleation on fiberglass fibers, rather than amorphous precipitates forming in the pool as predicted by WCAP-16530 11/1/11 Pre-Licensing Meeting 21 |
| | |
| | Risk Informed GSI-191 Preliminary Ideas for Application to Risk Informed Analysis |
| | * Use thermodynamics (and if possible) kinetics models to develop a chemical module for CASA Grande that can be used to calculate chemical precipitate types and quantities for any combination of parameters applicable to STP |
| | * Develop a chemical effects head loss algorithm that can be incorporated in the head loss module for CASA Grande that is applicable to the ranges of chemical and non-chemical debris loads at STP 11/1/11 Pre-Licensing Meeting 22 |
| | |
| | Risk Informed GSI-191 Thermodynamics Modeling 1000 pH = 7.0 pH = 7.5 100 Solubility Limit for 10 Aluminum (mg/L) 1 0.1 40 60 80 100 120 140 160 180 200 220 Temperature (F) 11/1/11 Pre-Licensing Meeting 23 |
| | |
| | Risk Informed GSI-191 Chemical Head Loss Modeling |
| | * Particulate Chemical Precipitate: |
| | - NUREG/CR-6224 Head Loss Correlation |
| | - Chemical particulate modeled as other particulates, i.e., surface to volume ratio and density |
| | * Amorphous Chemical Precipitate: |
| | - Develop a bump-up factor algorithm for low amorphous chemical precipitate to fiber loads |
| | - Interpolate WCAP-16530 head loss testing results 11/1/11 Pre-Licensing Meeting 24 |
| | |
| | Risk Informed GSI-191 Validation of Chemical Precipitate Model |
| | * Perform an Integrated 30 day test |
| | - Realistic simulation of STP conditions: |
| | * Temperature time history |
| | * Materials exposed to spray |
| | * Submerged material and debris |
| | * Flow through a fiber bed |
| | - Fluid analysis |
| | - Weight loss measurements |
| | - SEM of fiber bed 11/1/11 Pre-Licensing Meeting 25 |
| | |
| | Risk Informed GSI-191 Validation of Chemical Head Loss Model |
| | * Perform Vertical Head Loss tests with chemical particulate simulant |
| | - Compare Vertical Head Loss test results with NUREG/CR-6224 calculations |
| | - Wide range of eta (particulate to fiber weight ratio) |
| | - Wide range of debris bed thickness 11/1/11 Pre-Licensing Meeting 26 |
| | |
| | Risk Informed GSI-191 Conclusions |
| | * Currently available data indicates that chemical effects at STP is far less severe than predicted by the standard WCAP-16530 methodology |
| | * A combination of testing g and modeling g can be used to develop a realistic prediction of chemical effects for STP |
| | * A chemical module and modified head loss module will need to be implemented into CASA Grande for evaluation of full range of scenarios 11/1/11 Pre-Licensing Meeting 27}} |
Letter Sequence Meeting |
|---|
|
Administration
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
Results
Other: ML111640211, ML111861529, ML111890408, ML111890413, ML112130165, ML112350873, ML112350883, ML112630673, ML112630676, ML112770237, ML112770246, ML112770251, ML113050623, ML113060606, ML113060615, ML113060623, ML113210411, ML113330116
|
MONTHYEARML1104105052011-02-10010 February 2011
2/22/11 Notice of Forthcoming Public Meeting with STP Nuclear Operating Co., Units 1 & 2, to Discuss Risk-informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor Sump Performance, Resolution Option Approach
Project stage: Meeting
ML1107700052011-04-0505 April 2011
Summary of Meeting with STP Nuclear Operating Company to Discuss a Risk-informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Option Approach for South Texas, Units 1 and 2
Project stage: Meeting
ML1113302442011-05-16016 May 2011
Notice of Meeting with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and 2
Project stage: Meeting
ML1114706522011-05-16016 May 2011
Correction 06/02/2011 Notice of Meeting with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1
Project stage: Meeting
ML11157A0102011-06-0202 June 2011
STP Nuclear Operating Company, Licensee Handouts, 6/2/2011 Meeting Risk-Informed GSI-191 Closure Plan for GSI-191 Resolution
Project stage: Meeting
ML1116401602011-06-21021 June 2011
Summary of Meeting with STP Nuclear Operating Company Regarding Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance; Resolution Approach for South Texas, Units 1 and 2 (TAC ME5358-ME5
Project stage: Meeting
ML1116402112011-06-24024 June 2011
Notice of Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 & 2
Project stage: Other
ML1118903912011-07-0606 July 2011
Email Additional Materials for Teleconference on 7/7/11 with STP to Discuss Risk Informed GSI-191
Project stage: Meeting
ML1118904082011-07-0606 July 2011
Licensee Handout Loca Frequencie Approach and Example Application
Project stage: Other
ML1118904132011-07-0606 July 2011
Licensee Slide Regarding Questions on LOCA Frequency Analysis and Responses to Comments
Project stage: Other
ML1118904202011-07-0606 July 2011
Licensee Slide from 7/7/11 Meeting with STP Nuclear
Project stage: Meeting
ML1118903762011-07-0707 July 2011
Email Licensee Slides for 7/7/11 Teleconference with STP to Discuss Risk Informed GSI-191
Project stage: Meeting
ML1118903802011-07-0707 July 2011
Licensee Slides, LOCA Initiating Event Frequencies and Uncertainties(Draft)
Project stage: Draft Other
ML1118615292011-07-12012 July 2011
Notice of Conference Call with STP Nuclear Operating Company to Discuss Risk-informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and 2
Project stage: Other
ML1120707292011-07-26026 July 2011
Meeting Notice with South Texas Project, Units 1 and 2 - Licensee Slides Computational Fluid Dynamics Validation Plan
Project stage: Meeting
ML1120707072011-07-26026 July 2011
Meeting Notice with South Texas Project, Units 1 and 2 - Licensee Slide Models and Methods Used for Casa Grande
Project stage: Meeting
ML1121301822011-08-0202 August 2011
Meeting Notice with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and 2 (TAC ME5358-ME5359
Project stage: Meeting
ML1119500942011-08-0404 August 2011
Summary of Meeting with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and 2
Project stage: Meeting
ML1121301652011-08-19019 August 2011
7/26/11 - Summary of Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 an
Project stage: Other
ML1123508732011-08-22022 August 2011
Models and Methods Used for Casa Grande
Project stage: Other
ML1123508832011-08-22022 August 2011
LOCA Initiating Event Frequencies and Uncertainties Status Report
Project stage: Other
ML1125101482011-09-15015 September 2011
Notice of Meeting by Conference Call with STP Nuclear Operating Co. to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and 2
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NRC Staff Questions, Loss-of-Coolant Accident Frequency Analysis, Resolution Approach for Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance.
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Notice of Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 an
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ML1129701092011-11-0101 November 2011
Notice of Meeting Via Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor Sump Performance, Resolution Approach for South Texas, Units 1 & 2
Project stage: Meeting
ML1132104112011-11-0101 November 2011
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Questions Associated with Loss-of-Coolant Accident (LOCA) Frequency Analysis
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ML1133301162011-11-29029 November 2011
Email, 11/1/2011 Pre-Licensing Conference Call to Discuss the Topic of Expected Impact of Chemical Effects on GSI-191 Risk-Informed Evaluation, Phenomena Identification and Ranking Table Items (TAC ME5358-ME5359)
Project stage: Other
ML1131201292011-11-29029 November 2011
Summary of 11/1/11 Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance,Resolution Approach for South Texas, Un
Project stage: Meeting
ML1133505632011-12-0101 December 2011
Licensee Presentation from 12/1/11 Meeting Via Conference Call to Discuss Risk-Informed GSI-191,Assessment of Debris Accumulation on Pressurized Water Reactor Sump Performance
Project stage: Meeting
ML1131801962011-12-0505 December 2011
Summary of Meeting with STP Nuclear Operating Company Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas Units 1 and 2
Project stage: Meeting
ML1134300872011-12-23023 December 2011
Summary of 12/1/11 Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas Un
Project stage: Meeting
2011-05-16
[Table View] |
Licensee Handouts from November 1, 2011 Meeting with STP Nuclear Operating Company on GSI-191| ML113050632 |
| Person / Time |
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| Site: |
South Texas  |
|---|
| Issue date: |
10/26/2011 |
|---|
| From: |
Howe K, Leavitt J, Sande T, Zigler G
ALION Science & Technology Corp, Univ of New Mexico |
|---|
| To: |
Balwant Singal
Plant Licensing Branch IV |
|---|
| Singal, B K, NRR/DORL, 301-415-301 |
| Shared Package |
|---|
| ML113050615 |
List: |
|---|
| References |
|---|
| TAC ME5358, GSI-191, TAC ME5359 |
| Download: ML113050632 (27) |
|
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|---|
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[Table view] |
Text
Risk Informing STP GSI-191 Chemical Effects Risk Informed GSI-191 Resolution Tuesday, November 1 Public Meeting with STP Nuclear Operating Company Timothy D. Sande Dr. Kerry J. Howe Gilbert L. Zigler Janet J. Leavitt 11/1/11 Pre-Licensing Meeting 1
Risk Informed GSI-191 Outline
- Purpose of Chemical Effects Program
- Significant/Insignificant Contributors
- Previous Tests Relevant to STP
- Preliminary Ideas for Testing
- Preliminary Ideas for Risk Informed Application
- Conclusions 11/1/11 Pre-Licensing Meeting 2
Risk Informed GSI-191 Meeting Objective
- Present the STP risk informed chemical effects approach to the NRC
- Obtain NRC comments prior to developing an initial test plan 11/1/11 Pre-Licensing Meeting 3
Risk Informed GSI-191 Goals of Risk Informed Chemical Effects Program
- Fully understand physical and chemical phenomenon related to chemical effects at STP through research, testing, and modeling y
- Develop an analytical model for chemical precipitate formation that can be implemented in CASA Grande
- Develop an algorithm for chemical effects head loss that can be implemented in CASA Grande
- Validate models with prototypical testing 11/1/11 Pre-Licensing Meeting 4
Risk Informed GSI-191 Significant Contributors
- Precipitate Properties 11/1/11 Pre-Licensing Meeting 5
Risk Informed GSI-191 Significant Contributors
- RWST Chemistry 11/1/11 Pre-Licensing Meeting 6
Risk Informed GSI-191 Insignificant Contributors
- Biological Effects 11/1/11 Pre-Licensing Meeting 7
Risk Informed GSI-191 STP Parameters
- LBLOCA Containment Temperature: 260°F max to 120 120°FF at 30 days
- LBLOCA Pool Temperature: 267°F max to 126°F at 30 days
- Pool Volume: 31,431 ft3 min, 89,350 ft3 max
- Nominal Spray Duration: 12 hr 11/1/11 Pre-Licensing Meeting 8
Risk Informed GSI-191 STP Parameters
- RCS Chemistry: 1,400 - 0 ppm boron, 3.5 - 0.4 ppm lithium, 1 - <0.1 ppm Silica
6 ppm Silica
- Pool Chemistry: 2,372 - 2,878 ppm boron
- Coatings: Epoxy, IOZ, Polymide, Alkyd, Enamel
- Nominal Aluminum Area: 5,567 ft2 11/1/11 Pre-Licensing Meeting 9
Risk Informed GSI-191 STP Time Dependent pH 11/1/11 Pre-Licensing Meeting 10
Risk Informed GSI-191 STP Time Dependent Temperature 150°F 150 F at 3.5 3 5 days 140°F at 7 days 11/1/11 Pre-Licensing Meeting 11
Risk Informed GSI-191 Previous Tests Relevant to STP
- ICET Test 2 (integrated effects)
- Alion Vogtle Vuez Tests (integrated effects with head loss)
- Alion Vogtle and Calvert Cliffs High Temperature Vertical Loop (HTVL) Tests (aluminum solubility) 11/1/11 Pre-Licensing Meeting 12
Risk Informed GSI-191 STP WCAP-16530 Prediction Material Released Quantity (kg)
Calcium* 63.06 Silicon 208.85 Aluminum 82.92 Precipitate Quantity (kg)
Sodium Aluminum Silicate 649.5 Aluminum Oxyhydroxide 35.7 Calcium Phosphate* 162.7
- Includes marinite source that is no longer in containment 11/1/11 Pre-Licensing Meeting 13
Risk Informed GSI-191 STP WCAP-16785 Prediction Refinement Aluminum NaAlSi3O8 AlOOH Ca3(PO4)2 (ppm) (kg) (kg) (kg)
Base Case 82.9 649.5 35.7 162.7 Silicon Inhibition 18.3 177.4 0.0 162.7 Phosphate Inhibition 69.4 649.5 5.6 162.7 Solubility Limits 82.9 0.0 0.0 162.7 11/1/11 Pre-Licensing Meeting 14
Risk Informed GSI-191 ICET Test Overview Insulation (%) Chemical byproducts ICET Test Controlling pH Measured pH Visible at test Visible upon Number buffer system Fiberglass Cal-Sil temperature cooling 1 Borate (NaOH) 100 0 9.3 - 9.5 No Yes 2 Phosphate (TSP) 100 0 7.1 - 7.4 No No Yes, only 3 Phosphate (TSP) 20 80 7.3 - 8.1 during first few No hours 4 Borate (NaOH) 20 80 9.5 - 9.9 No No 5 Borate (Borax) 100 0 8.2 - 8.5 No Yes Test Duration: 30 days Test Temperature: 140°F Spray Duration: 4 hr Water Chemistry: Boron, lithium hydroxide, hydrochloric acid 11/1/11 Pre-Licensing Meeting 15
Risk Informed GSI-191 Comparison to ICET Test 2 Inputs Ratio of STP Ratio of ICET STP Quantities to Test 2 Ratio Material Type Quantities* Max Pool Quantities to ICET/STP Volume Tank Volume Aluminum submerged 700 ft2 0.007834 ft2/ft3 0.179 ft2/ft3 22.8 Aluminum exposed to spray 6300 ft2 0.070509 ft2/ft3 3.34 ft2/ft3 47.4 Fiberglass insulation submerged 2385.1 ft3 0.026694 ft3/ft3 0.103 ft3/ft3 3.9 Marinite insulation submerged 15.2 ft3 0.00017 ft3/ft3 - 0.0 Microtherm insulation submerged 1.8 ft3 2.01E-05 ft3/ft3 - 0.0 Concrete submerged 5700 ft2 0.063794 ft2/ft3 0.015 ft3/ft3 0.2
- Quantities are taken from conservative inputs used in STP WCAP calculation, marinite removed, concrete only exposed to spray, etc.
11/1/11 Pre-Licensing Meeting 16
Risk Informed GSI-191 ICET Test Results 450 80 Test 1 unfiltered Test 5 unfiltered Alum minum concentration (mg/L) Alum minum concentration (mg/L) 400 70 Test 1 filtered Test 5 filtered 350 60 300 50 250 40 200 30 150 100 20 50 10 0 0 0 10 20 30 0 10 20 30 (a) Time (days) (b) Time (days)
Aluminum concentration below detection limit for Tests 2, 3, 4 Aluminum concentration leveled off over time for Tests 1, 5 Inverse trend between aluminum and silicon concentrations 11/1/11 Pre-Licensing Meeting 17
Risk Informed GSI-191 Alion Vogtle Vuez Test Results
~1 5x over 30 days
~1.5x days, possibly due to effect of fiber bed dissolution (NUREG/CR-6808)
Increasing head loss due to Nukon dissolution (reproduced from NUREG/CR-6808 Figure 7-23) 11/1/11 Pre-Licensing Meeting 18
Risk Informed GSI-191 Alion Vogtle and Calvert Cliffs HTVL Tests Vogtle Calvert Cliffs
- Results: No precipitation
- Results: No precipitation at temperatures as low at temperatures as low as 128°F as 60°F 11/1/11 Pre-Licensing Meeting 19
Risk Informed GSI-191 Preliminary Ideas for Testing
- Perform integrated tests to determine material corrosion/dissolution/release rates and characterize precipitates in order to develop thermodynamics and kinetics models
- Perform benchtop or autoclave tests to further develop database for models
- Perform HTVL tests with replicated precipitates and varying debris loads to develop a chemical effects head loss algorithm 11/1/11 Pre-Licensing Meeting 20
Risk Informed GSI-191 Test Characterization of Precipitates
- VUEZ tests indicate precipitates form as crystals, with nucleation on fiberglass fibers, rather than amorphous precipitates forming in the pool as predicted by WCAP-16530 11/1/11 Pre-Licensing Meeting 21
Risk Informed GSI-191 Preliminary Ideas for Application to Risk Informed Analysis
- Use thermodynamics (and if possible) kinetics models to develop a chemical module for CASA Grande that can be used to calculate chemical precipitate types and quantities for any combination of parameters applicable to STP
- Develop a chemical effects head loss algorithm that can be incorporated in the head loss module for CASA Grande that is applicable to the ranges of chemical and non-chemical debris loads at STP 11/1/11 Pre-Licensing Meeting 22
Risk Informed GSI-191 Thermodynamics Modeling 1000 pH = 7.0 pH = 7.5 100 Solubility Limit for 10 Aluminum (mg/L) 1 0.1 40 60 80 100 120 140 160 180 200 220 Temperature (F) 11/1/11 Pre-Licensing Meeting 23
Risk Informed GSI-191 Chemical Head Loss Modeling
- Particulate Chemical Precipitate:
- NUREG/CR-6224 Head Loss Correlation
- Chemical particulate modeled as other particulates, i.e., surface to volume ratio and density
- Amorphous Chemical Precipitate:
- Develop a bump-up factor algorithm for low amorphous chemical precipitate to fiber loads
- Interpolate WCAP-16530 head loss testing results 11/1/11 Pre-Licensing Meeting 24
Risk Informed GSI-191 Validation of Chemical Precipitate Model
- Perform an Integrated 30 day test
- Realistic simulation of STP conditions:
- Materials exposed to spray
- Submerged material and debris
- Fluid analysis
- Weight loss measurements
- SEM of fiber bed 11/1/11 Pre-Licensing Meeting 25
Risk Informed GSI-191 Validation of Chemical Head Loss Model
- Perform Vertical Head Loss tests with chemical particulate simulant
- Compare Vertical Head Loss test results with NUREG/CR-6224 calculations
- Wide range of eta (particulate to fiber weight ratio)
- Wide range of debris bed thickness 11/1/11 Pre-Licensing Meeting 26
Risk Informed GSI-191 Conclusions
- Currently available data indicates that chemical effects at STP is far less severe than predicted by the standard WCAP-16530 methodology
- A combination of testing g and modeling g can be used to develop a realistic prediction of chemical effects for STP
- A chemical module and modified head loss module will need to be implemented into CASA Grande for evaluation of full range of scenarios 11/1/11 Pre-Licensing Meeting 27