ML13149A405

Metals BENCH-TOP Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant, CCNPP-CHLE-006, Revision 0, May 23, 2013

ML13149A405
Person / Time
Site:	Calvert Cliffs
Issue date:	05/23/2013
From:	Sellers C Enercon Services
To:	Office of Nuclear Reactor Regulation
Morgan N
References
CCNPP-CHLE-006, Rev 0
Download: ML13149A405 (12)

Text

METALS BENCH-TOP AUTOCLAVE EXPERIMENT TEST PLAN for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006, Revision 0 May 23, 2013 Prepared by:

Reviewed by:

Approved by:

Craig D. Sellers Andy Henni, Steve Kinsey John Swailes Blake Stair, Tim Sande Tom Konerth

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 i

REVISION HISTORY Log Revision Description 0

Initial issue

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 ii Contents 1.0 Introduction................................................................................................................................................................ 1 2.0 Purpose......................................................................................................................................................................... 1 3.0 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................................................................................................................................... 3 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 Material 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 9.0 References.................................................................................................................................................................... 8

NEI Fiber Debris Preparation Protocol............................................................ 10 Pages List of Tables Table 1: Debris 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

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 1 of 8

1.0 INTRODUCTION

Calvert Cliffs Nuclear Power Plant (CCNPP) is implementing a refined chemical effects test program to aid in resolving GSI-191. This refined chemical effects test program includes a number of experiments and tests to investigate different aspects of chemical effects. Included in this program are integrated chemical effects head loss tests intended to simulate temperature, pressure, fluid, and debris conditions in containment after a loss of coolant accident (LOCA).

CCNPP has a variety of potentially reactive materials in containment that must be considered in the refined chemical effects test program. Some of these materials may influence the dissolution or corrosion of other materials such that including them in the integrated tests can be considered non-conservative. Some materials may be sufficiently immune to dissolution and corrosion so that they can be excluded from the integrated tests.

The objective of this bench-top autoclave test plan is to investigate the corrosion and elemental release rates of key materials and combinations of materials and determine which material combinations are most appropriate for inclusion in the integrated chemical effects head loss tests for CCNPP.

2.0 PURPOSE The purpose of this document is to describe a bench-top autoclave experimental plan for the CCNPP CHLE program. This plan presents the material combinations for the experiments, the thermal and chemistry conditions for each experiment, and the approach to analyzing the results.

3.0 EXPERIMENTAL PLAN The experimental plan consists of a series of corrosion experiments in which different combinations of potentially reactive materials are exposed to high temperature fluid simulating the post-LOCA fluid chemistry and temperature in containment for a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period. 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 between the different combinations of materials. Analysis of the results will provide recommendations on materials to include in the integrated tests.

Materials used in the test will be representative of the insulation debris and metallic materials submerged in the containment pool or exposed to containment spray and expected to dissolve and contribute to chemical effects. The material quantities will be scaled to 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.

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 2 of 8 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: Debris 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 Marinite Board 2.75 in2/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

Pure Zinc 12 in2/L 5 & 6 Lead

0. 04 in2/L 1

4.3 Chemistry Conditions Table 3: Chemistry Conditions Deionized Water with Reference Boron Concentration (H3BO3) 2800 ppm as boron1 8

Lithium Hydroxide 0.78 ppm as lithium 8

Initial pH

~5 N/A 4.4 Buffer Include 3.78 grams per liter sodium tetraborate decahydrate (NaTB) buffer.

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

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 3 of 8 4.5 Temperature Conditions The experiments will use the temperature profile presented in Table 4 and Figure 1 +/-5°F [Ref. 7].

Table 4: Solution Temperature Profile Time (Hr)

Temp (F) 0 280 2

280 4

225 8

220 12 215 18 208 24 200 32 190 40 180 48 170 Figure 1: Solution & Sump AOR Temperatures 150 170 190 210 230 250 270 290 0

8 16 24 32 40 48 Temperature (F)

Time (Hrs)

Test Temperature AOR Sump Temperature

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 4 of 8 4.6 Solution Sampling The fluid solution in the autoclave shall be sampled 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 Test No.

Metals Included Aluminum Copper Galvanized Steel Zinc Lead 1

X 2

X 3

X 4

X 5

X 6

X X

X X

X 7

X X

8 X

X 9

X X

10 X

X 11 X

X X

12 X

X X

13 X

X

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 5 of 8 6.0 CHEMISTRY ANALYSIS Mass spectrometry of the fluid used in the experiment shall be performed:

1. On the deionized water after addition of the boric acid, lithium hydroxide, and NaTB and before introduction of any of the debris materials or reactive materials at the beginning of each experiment, and

2. On the fluid solution collected at the conclusion of each experiment.

The concentrations of the following elemental species shall be reported:

1. Aluminum

2. Boron

3. Calcium

4. Chromium

5. Iron

6. Lead

7. Magnesium

8. Nickel

9. Molybdenum

10. Phosphorus

11. Silicon

12. Sodium

13. Sulfur

14. 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 Material Preparation 7.1.1 Debris Materials Fibrous debris shall be prepared in accordance with Attachment 1 [Ref. 9], 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. Drying shall be performed at temperatures below 250°F. 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.

Marinite coupons will be cut from a solid piece of Marinite board. The Marinite coupons shall not include particles which can pass through a 16 mesh sieve. The 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.

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 6 of 8 Photographs of the debris materials before preparation, after weighing or measuring, and contained in the mesh container shall be provided.

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.

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 8.2.2 Experiment Input Parameters A detailed description of the input parameters for each experiment shall be presented.

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 7 of 8 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

4) Photographs

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 8 of 8

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 CA06938, Rev. 0001, Prediction of LOCA Coating Debris Loads on the Containment Sump Strainer.

6. Design Calculation CA07464, Rev. 0000, Prediction of LOCA Coating Debris Loads on the Containment Sump Strainer.

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

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

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

Metals Bench-Top Autoclave Experiment Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-CHLE-006 Revision 0, May 23, 2013 Page 1-1 of 1-10 NEI Fiber Debris Preparation Protocol 9 pages follow