ML13319A939

Ri GSI-191 November 2013 Meeting with NRC Rev 0

ML13319A939
Person / Time
Site:	Calvert Cliffs
Issue date:	11/13/2013
From:	Constellation Energy Group, EDF Group
To:	Office of Nuclear Reactor Regulation
Morgan N
Shared Package
ML13319A601	List: ML13319A621 ML13319A670 ML13319A679 ML13319A725 ML13319A773 ML13319A818 ML13319A932 ML13319A939
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Download: ML13319A939 (12)

Text

Calvert Cliffs Chemical Effects in Risk-Informed k f d GSI-191 Resolution Si h Di Sixth Discussion i WiWith h NRC SStaff ff November 13, 2013

Agenda

Introductions

Objectives for Meeting Discuss Preliminary Autoclave Test Results Discussion of Chemical Effects PIRT Items Discussion of Alkyds Autoclave Test Plan Discussion of Integrated Chemical Effects Testing Topics

- Zinc and Marinite Debris

- Chemical Effects Head Loss Loop Design Discussion of Small-Scale Small Scale Debris Bypass/Penetration Test Plan Schedule for future periodic meetings 2

CCNPP Attendees Tom Konerth - Supervisor Mechanical Design Ken Greene - Licensing Engineer John Swailes - Project Manager GSI-191 Crai Sellers - Project Craig Proje t Manager Mana er RI GSI-191 GSI 191 Steve Kinsey - Chemical Effects Testing J hW Josh Wargo - Chemical Ch i l EffEffects TTesting i

Jon Cavallo - Coatings Consultant 3

Objectives of Meeting Discuss Preliminary Autoclave Test Results Continue to Work Towards Agreement on Chemical Effects PIRT Issues I - CCNPP-CHLE-003 CCNPP CHLE 003 Review & Work Towards Agreement on Chemical Effects Testing Topics

- Alkyd Alk dAAutoclave l TTest Pl Plan - CCNPP-CHLE-007 CCNPP CHLE 007

- Considerations for Zinc - CCNPP-CHLE-008

- Considerations for Marinite - CCNPP-CHLE-009

- Integrated Chemical Effects Head Loss Loop Design Review & Work Towards Agreement on Small-Scale Strainer Bypass Test Plan - CCNPP-BPPlan-002 Present Proposed Schedule for Future Meetings Capture Staff Issues and Concerns 4

Preliminary Autoclave Test Results CCNPP-CHLE-006 - Metals

- Insignificant Concentrations

• Cr, Fe, Ni

- Very High Ca Concentration

• Influenced Revised Marinite Scaling Methodology

- Very High Zn Concentration

• Pure Zinc >> Galvanized Steel

• Influenced Revised Zinc Modeling Methodology

- Preliminary Data Insufficient for Additional Insights CCNPP CCNPP-CHLE-005 CHLE 005 - High Temperature

- No Results to Date 5

Chemical Effects PIRT Issues PIRT Item 2.5 Additional Debris Bed Chemical Reactions

- Fiberglass & Metals Insensitive

- Irradiation is not expected to have a chemical effects impact on coatings PIRT Item 3.9 Concrete Material Aging

- Using concrete from Original Plant Construction

- All Original Concrete Made On-Site with Same Materials PIRT Item 6.4 Coatings g Dissolution and Leachingg

- Epoxy Coatings Not Sensitive

- Zinc Coatings Used in Tests

- Alkyd Coatings to be addressed in Autoclave Test Others 6

Alkyds Autoclave Test Plan - CCNPP-CHLE-007 Investigate Chemical Effects from Alkyd Coatings

- Apply Alkyd Coatings to SS Coupons

- Include LOCA Debris and Exposed Reactive Materials

- Submerge in Borated Water

- Dissolve Buffer at 195°F 195 F

- Expose to LOCA Temperature Profile for 7 Days

- Vacuum Filtration for Head Loss Implications

- Visuall Examination ffor Debris b / Precipitates

- Chemical Analysis for Potential Precipitants & Organics Section-by Section Review 7

Zinc Considerations - CCNPP-CHLE-008 Failed Inorganic Zinc Coatings Historically Treated as 10 µµm Spheres p for Hydraulic y Characteristics Modeling as such in Chemical Effects Testing Results in Very Large Surface Area of Surrogate Material Calvert Cliffs Proposed Approach

- IOZ in ZOI and Unqualified Zinc-Rich Coatings Tested using Smooth Zinc Plate Surrogate with Same Surface Area as 10

µm Spheres

- Degraded Qualified IOZ Tested using Cured/Aged IOZ Coated Co Coupons pons with ith 2 2x SSurface rface Area of Degraded Coatings 8

Marinite Considerations - CCNPP-CHLE-009 Marinite Fines Debris Historically Treated as 10 µm Spheres for Hydraulic Characteristics Modeling as such in Chemical Effects Testing Results in Very e y Large a ge Surface Su ace Area ea of o Solid So d Marinite a te Calvert Cliffs Proposed Approach

- Marinite Fine Debris Tested usingg 1/2 Thick Marinite Board with 25% of the Surface Area as 44 µm Spheres

- Marinite non-Fines Tested using 1/2 Thick Marinite Board with ith P Postulated t l t d SSurface f A Area SSubmerged b d or SSprayed d

9

Integrated Chemical Effects Head Loss Test Loop Primary Reaction Chamber (Showing Clearance for Coupons)

Vertical Head Loss Column Initial Preparation Chamber Heat Exchanger Loop Loop Heating & Cooling 10

Small-Scale Bypass Test Plan-CCNPP-BPPlan-002 Sensitivity Tests

• Design of Experiments

- Water Chemistry Run Fiber Type Water Chemistry Temperature

- Water Temperature 1 Nukon Tap 90°F

- Fiber Mixture 2 Cocktail Tap 90°F 3 Nukon Borated Buffer 90°F Prototypical Strainer 4 Cocktail Borated Buffer 90°F 5 Nukon Tap 180°F

- Fabricated from Similar 6 C kt il Cocktail T Tap 180°F Perforated Plate 7 Nukon Borated Buffer 180°F 8 Cocktail Borated Buffer 180°F Continuous Filtration 9 TBD TBD 135°F 10 TBD (Repeatability Test)

Section-by Section Review 11

Schedule for Future Periodic Meeting January 2014

- Chemical Effects Bench-Top Bench Top Test Results

- Final Chemical Effects Screening Test Protocol 12