ML13149A399

Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005, Revision 2, May 20, 2013

ML13149A399
Person / Time
Site:	Calvert Cliffs
Issue date:	05/20/2013
From:	Sellers C Enercon Services
To:	Office of Nuclear Reactor Regulation
Morgan N
References
CCNPP-CHLE-005, Rev 2
Download: ML13149A399 (12)

Text

CHEMICAL EFFECTS AUTOCLAVE EXPERIMENT TEST PLAN for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005, Revision 2 May 20, 2013 Prepared by: Reviewed by: Approved by:

Craig D. Sellers Andy Henni, Steve Kinsey John Swailes Helmut Kopke, Tim Sande Tom Konerth

Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 REVISION HISTORY Log Revision Description 0 Issue for initial experiment 1 Reduce aluminum concentration to 2x best estimate and revise boron & lithium concentrations to actual maximum concentrations.

2 Increased boron concentration to account for BAST discharge, reduced Lithium Hydroxide concentration, revised temperature profile, and increased level of prescriptive detail.

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Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 Contents 1.0 Introduction ................................................................................................................................................................ 1 2.0 Purpose ......................................................................................................................................................................... 1 3.0 Overall experimental Plan ..................................................................................................................................... 1 4.0 Experimental Parameters ...................................................................................................................................... 2 4.1 Debris Quantities .................................................................................................................................................. 2 4.2 Reactive Material.................................................................................................................................................. 2 4.3 Chemistry Conditions ......................................................................................................................................... 2 4.4 Buffer ......................................................................................................................................................................... 2 4.5 Temperature Conditions ................................................................................................................................... 2 4.6 Solution Sampling ................................................................................................................................................ 4 4.7 Agitation................................................................................................................................................................... 4 4.8 Autoclave Materials ............................................................................................................................................. 4 5.0 Test Matrix ................................................................................................................................................................... 4 6.0 Chemistry Analysis ................................................................................................................................................... 5 7.0 Experimental Methods ............................................................................................................................................ 5 7.1 Debris Preparation .............................................................................................................................................. 5 8.0 Report ............................................................................................................................................................................ 6 8.1 Introduction ........................................................................................................................................................... 6 8.2 Experiment Description .................................................................................................................................... 6 8.3 Experimental Results.......................................................................................................................................... 7 8.4 Summary of Results and Conclusions .......................................................................................................... 7 8.5 References ............................................................................................................................................................... 7 8.6 Appendixes ............................................................................................................................................................. 7 : NEI Fiber Debris Preparation Protocol ............................................................ 10 Pages List of Tables Table 1: Insulation Sample Quantities ............................................................................................................................ 2 Table 2: Reactive Material Quantities ............................................................................................................................. 2 Table 3: Chemistry Conditions ........................................................................................................................................... 2 Table 4: Solution Temperature Profile ........................................................................................................................... 3 Table 5: Test Matrix ................................................................................................................................................................ 4 List of Figures Figure 1: Solution & Sump AOR Temperatures........................................................................................................... 3 ii

Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013

1.0 INTRODUCTION

Calvert Cliffs Nuclear Power Plant (CCNPP) is implementing a risk-informed approach to resolving GSI-191 that includes the performance of a number of chemical effects experiments. These experiments are intended to simulate temperature, pressure, fluid, and debris conditions in containment after a loss of coolant accident (LOCA).

Temperature conditions inside containment during the initial portion of a large break LOCA peak at approximately 280°F. Simulating these temperature conditions in a chemical effects test requires the use of a pressurized test facility. Elemental release estimates using the WCAP-16530 methodology indicate at a constant temperature of 195°F for 21 hours2.430556e-4 days <br />0.00583 hours <br />3.472222e-5 weeks <br />7.9905e-6 months <br />, the release of aluminum was the same as the initial 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> at the analysis of record sump temperature. The same estimate indicated a 69% increase in calcium release and a 25% increase in silicon release.

The objective of this autoclave test is to validate the WCAP-16530 release estimate and to investigate whether maintaining the test temperature at 195°F for an extended time adequately simulates the elemental release from prototypical materials during the initial 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> of a design basis LOCA at CCNPP. The results of this test will influence the decision on how to simulate the high temperature portion of the accident profiles in the CCNPP Chemical Effects Head Loss Experiment (CHLE) program.

2.0 PURPOSE The purpose of this document is to describe the autoclave experiment planned for the CCNPP CHLE program. This plan presents the sequence for performing the experiment and the conditions for each experiment.

3.0 OVERALL EXPERIMENTAL PLAN The overall concept for the experiment is eight corrosion experiments, four using a temperature profile similar to the initial 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> of the design basis LOCA at CCNPP and four maintained at 195°F for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, with fluid simulating the post-LOCA fluid solution in containment and corrodible materials expected in containment in the fluid. The identification and concentration of corrosion products and characterization of any precipitates will be compared to determine if there is a significant difference in corrosion and elemental release at two temperature conditions.

Materials used in the test will be representative of the materials submerged in the containment pool or exposed to containment spray and expected to dissolve and contribute to chemical effects in the initial 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> of the LOCA. These include destroyed insulation, concrete, latent debris and other miscellaneous materials in containment. The material quantities will be scaled to Page 1 of 8

Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 approximate the ratio of the test fluid volume to the volume of debris materials immersed in the pool fluid or the surface area of solid materials exposed to pool at CCNPP.

The fluid chemistry will be similar to the initial post-LOCA pool chemistry expected at CCNPP. A scaled quantity of NaTB buffer will be allowed to dissolve in the test chamber to simulate the dissolution of buffer in the plant.

4.0 EXPERIMENTAL PARAMETERS 4.1 Debris Quantities Table 1: Insulation Sample Quantities Insulations Debris Test Quantity Reference Transco Thermal Wrap or NUKON (LDFG) Fiber 1.10 gram/Liter (g/L) 1&2 Mineral Wool Fiber 0.30 g/L 1&2 4.2 Reactive Material Table 2: Reactive Material Quantities Material Description Test Quantity Reference Metallic Aluminum 0.03 in2/L 3 Galvanized Steel 7.5 in2/L 4 Copper 11.8 in2/L 4 Exposed Concrete 0.1 in2/L 4 Marinite Board 2.75 in2/L 1 4.3 Chemistry Conditions Table 3: Chemistry Conditions Deionized Water with Reference Boron Concentration (H3BO3) 2800 ppm as boron1 6 Lithium Hydroxide 0.78 ppm as lithium 6 Initial pH ~5 N/A 4.4 Buffer Include 3.78 grams per liter sodium tetraborate decahydrate (NaTB) buffer.

4.5 Temperature Conditions Four experiments will be maintained at 195°F +/-5°F for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

1 The 2800 ppm boron concentration is prior to the introduction of the NaTB buffer.

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Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 The other four will simulate the temperature profile presented in Table 4 and Figure 1 +/-5°F [Ref. 5].

Table 4: Solution Temperature Profile Time (m) Temp (F) 0 280.0 10 280.0 60 271.5 120 263.0 180 254.5 240 246.0 300 237.5 360 229.0 420 220.5 480 212.0 540 203.5 600 195.0 290.0 280.0 270.0 260.0 Temperature (F) 250.0 240.0 230.0 220.0 210.0 200.0 190.0 0 100 200 300 400 500 600 Time (Minutes)

Autoclave Temp (F) AOR Sump Temp(F)

Figure 1: Solution & Sump AOR Temperatures Page 3 of 8

Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 4.6 Solution Sampling The fluid solution in the autoclave shall be sampled periodically as specified in the Test Matrix and at the conclusion of each experiment. The samples shall be stored in containers fabricated from non-reactive and corrosion resistant materials.

4.7 Agitation The autoclave shall be agitated continuously throughout the experiment to facilitate fluid flow across the contained materials.

4.8 Autoclave Materials Wetted materials of the autoclave should be type 316 stainless steel or other very corrosion resistant material. No silicate glass products may be used.

5.0 TEST MATRIX The experiment will be performed in accordance with the test matrix presented in Table 5.

Table 5: Test Matrix Materials/Chemicals Included Sample Test No. Temp (F) Duration Times Table 1 Table 2 Table 3 1 No No Yes Table 4 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 2 No No Yes 195 +/-5 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 3 Yes Yes Yes Table 4 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 4 Yes Yes Yes Table 4 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 5 Yes Yes Yes Table 4 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> 6 Yes Yes Yes 195 +/-5 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 16, 18, 20, 7 Yes Yes Yes 195 +/-5 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 22, & 24 8 Yes Yes Yes 195 +/-5 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> hours Page 4 of 8

Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 6.0 CHEMISTRY ANALYSIS Mass spectrometry of the fluid used in the experiment shall be performed:

1. On the deionized water prior to addition of the boric acid at the beginning of each experiment, and

2. On the fluid solution collected during each experiment.

The concentrations of the following elemental species shall be reported:

1. Aluminum

2. Boron

3. Calcium

4. Chromium

5. Iron

6. Magnesium

7. Nickel

8. Molybdenum

9. Phosphorus

10. Silicon

11. Sodium

12. Sulfur

13. Zinc 7.0 EXPERIMENTAL METHODS Professional laboratory and safety practices shall be followed. Specific laboratory procedures used to implement the experiment shall be made available to Calvert Cliffs for review and comment.

The following specific experimental processes shall also be followed.

7.1 Debris Preparation 7.1.1 Fibrous Debris Fibrous debris shall be prepared in accordance with Attachment 1 [Ref. 7], with the exception of steps 6.6 and 6.7, dried, and weighed to the quantity specified. The water used for soaking in step 6.5 of Attachment 1 shall be deionized water. The fiber samples will be placed in stainless steel mesh containers and secured to remain submerged in the experimental fluid and protected from the agitation mechanism. Photographs of the fiber before preparation, after weighing, and contained in the mesh container shall be provided.

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Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 7.1.2 Reactive Materials Coupons of metal reactive materials shall be prepared from 20 gauge or thinner flat plates. The coupons shall be suspended in the autoclave fluid so that both faces are fully exposed to the fluid.

Concrete coupons may be fresh concrete or chipped from masonry block. Marinite coupons will be cut from a solid piece of Marinite board. The concrete and Marinite coupons shall not include particles which can pass through a 16 mesh sieve. The concrete and Marinite coupons will be placed in stainless steel 18 mesh containers and secured to remain submerged in the experimental fluid and protected from the agitation mechanism.

Photographs of the reactive materials before and after preparation shall be provided.

8.0 REPORT A formal report shall be provided documenting the performance of the experiment and the results of the experiment. The following topics shall be included in the report.

8.1 Introduction A brief introduction to the report shall be presented 8.2 Experiment Description A detailed description of the experiment shall be presented including at least the following sections.

8.2.1 Facility A comprehensive description of the experimental facility shall be presented with photographs. This shall include:

1) Autoclave(s)

a. Volume capacity

b. Wetted materials

c. Heating method

d. Agitation method

2) Temperature controls

a. Heat up rate

b. Cool down rate

3) Instrumentation and analysis equipment

a. Temperature

b. pH

c. Mass Spectrometry Page 6 of 8

Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 8.2.2 Experiment Input Parameters A detailed description of the input parameters for each experiment shall be presented.

8.2.3 Material Preparation The methods and processes for preparing fluid solutions and corrosion samples shall be described and the results presented with photographs.

8.2.4 Autoclave Setup and Control The procedures used to setup the autoclave, control temperature conditions, take and store samples, and perform the chemistry analyses shall be described in detail.

8.3 Experimental Results The results of each test shall be presented in individual sections. These sections shall include at least the following information.

1) Experimental parameters used

2) Actual temperature profile achieved

3) Results of chemical analysis of samples

4) Deviations and Nonconformance Reports

5) Photographs of notable observations as appropriate 8.4 Summary of Results and Conclusions A summary of results comparing the individual tests if the experiment will be presented and any conclusion drawn presented.

8.5 References Unique references used in the preparation of the report shall be presented. This test plan shall be included as a reference.

8.6 Appendixes Appendixes shall be provided including as a minimum the following:

1) Test Logs

2) Calibration Certificates/Records

3) Standards Certificates Page 7 of 8

Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013

9.0 REFERENCES

1. Design Calculation CA0xxx, Rev. 000y, ENERCON Calculation No. CNSCC016-CALC-002, Calvert Cliffs Debris Generation Calculation.

2. Design Calculation CA0xxx, Rev. 000y, ENERCON Calculation No. CNSCC016-CALC-005, Calvert Cliffs Risk-Informed Debris Transport Calculation.

3. Design Calculation CA06940, Rev. 0001, Computation of Aluminum and Marinite Board Debris Load Inputs for Containment Sump Strainer.

4. Design Calculation CA0xxx, Rev. 000y, ENERCON Calculation No. CNSCC016-CALC-004, Calvert Cliffs Containment Metal Calculation.

5. Design Calculation CA06774, Rev. 0002, Containment Response to LOCA and MSLB for Calvert Cliffs Units 1 and 2.

6. Design Calculation CA0xxx, Rev. 000y, MPR Calculation No. 0090-0269-01, Post-LOCA Containment Pool Boron, Lithium Hydroxide, and Silica Concentrations.

7. ZOI Fibrous Debris Preparation: Processing, Storage and Handling, Revision 0, Nuclear Energy Institute, October, 2011.

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Chemical Effects Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-005 Revision 2, May 20, 2013 Attachment 1 NEI Fiber Debris Preparation Protocol 9 pages follow Page 1-1 of 1-10