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
References
Download: ML13319A939 (12)

Text

Calvert Cliffs Calvert Cliffs Chemical Effects in k

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Risk-Informed GSI-191 Resolution Resolution Si h Di i

Wi h NRC S ff Sixth Discussion With NRC Staff November 13, 2013

Agenda

Introductions

Objectives for Meeting 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 Debris Bypass/Penetration Test Plan Discussion of Small Scale Debris Bypass/Penetration Test Plan Schedule for future periodic meetings 2

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

h W Ch i

l Eff T

i Josh Wargo - Chemical Effects Testing Jon Cavallo - Coatings Consultant 3

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

T Pl CCNPP CHLE 007

- Alkyd Autoclave Test Plan - CCNPP-CHLE-007

- Considerations for Zinc - CCNPP-CHLE-008

- Considerations for Marinite - CCNPP-CHLE-009 Integrated Chemical Effects Head Loss Loop Design

- 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 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-CHLE-005 - High Temperature CCNPP 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 Dissolution and Leaching g

g

- Epoxy Coatings Not Sensitive

- Zinc Coatings Used in Tests

- Alkyd Coatings to be addressed in Autoclave Test 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 Dissolve Buffer at 195 F

- Expose to LOCA Temperature Profile for 7 Days

- Vacuum Filtration for Head Loss Implications l

f b

/

- Visual Examination for Debris / 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 µm Spheres for Hydraulic Characteristics

µ p

y 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 Smooth Zinc Plate Surrogate with Same Surface Area as 10

µm Spheres

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

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

te Calvert Cliffs Proposed Approach

- Marinite Fine Debris Tested using 1/2 Thick Marinite Board g

with 25% of the Surface Area as 44 µm Spheres

- Marinite non-Fines Tested using 1/2 Thick Marinite Board ith P t l t d S f

A S b d

S d

with Postulated Surface Area Submerged or Sprayed 9

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

Heat Exchanger Loop Initial Preparation Chamber Loop Heating & Cooling 10

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

• Design of Experiments

- Water Chemistry

- Water Temperature

- Fiber Mixture Run Fiber Type Water Chemistry Temperature 1

Nukon Tap 90°F 2

Cocktail Tap 90°F Prototypical Strainer

- Fabricated from Similar 3

Nukon Borated Buffer 90°F 4

Cocktail Borated Buffer 90°F 5

Nukon Tap 180°F 6

C kt il T

180°F Perforated Plate Continuous Filtration 6

Cocktail Tap 180°F 7

Nukon Borated Buffer 180°F 8

Cocktail Borated Buffer 180°F 9

TBD TBD 135°F Section-by Section Review 10 TBD (Repeatability Test) 11

Schedule for Future Periodic Meeting January 2014

- Chemical Effects Bench-Top Test Results Chemical Effects Bench Top Test Results

- Final Chemical Effects Screening Test Protocol 12