ML13319A932
| ML13319A932 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 11/11/2013 |
| From: | Plont A, Zigler G Constellation Energy Group |
| To: | Office of Nuclear Reactor Regulation |
| Morgan N | |
| Shared Package | |
| ML13319A601 | List: |
| References | |
| CCNPP-BPPlan-002, Rev 0E | |
| Download: ML13319A932 (18) | |
Text
SMALL SCALE DEBRIS BY-PASS/PENETRATION TEST PLAN FOR CALVERT CLIFFS NUCLEAR POWER PLANT CCNPP-BPPlan-002, Revision 0E November 11, 2013 Prepared by:
Reviewed by:
Approved by:
Gilbert Zigler Kip Walker, John Swailes, Ariana Plont Mark Harriman, Tom Konerth Helmut Kopke, Craig Sellers
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 i
REVISION HISTORY LOG Revision Description 0A Issue for Internal Review 0B Edited based on Craig Sellers comments 0C Incorporated comments from Mark Harriman 0D Incorporated comments from S&L 0E Revise Purpose and Test Objective sections to clarify the purpose of the small-scale sensitivity testing scope and remove plans for fiber characterization.
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 ii Table of Contents 1
Purpose......................................................................................................................................................................... 1 2
Test Objectives........................................................................................................................................................... 1 3
Technical Approach................................................................................................................................................. 2 3.1 Test Module............................................................................................................................................................ 2 3.2 Test Variables........................................................................................................................................................ 2 3.2.1 Debris Types................................................................................................................................................. 4 3.2.2 Debris Size..................................................................................................................................................... 4 3.2.3 Water Chemistry......................................................................................................................................... 5 3.2.4 Water Temperature................................................................................................................................... 5 3.2.5 Approach Velocity (Flow Rate)............................................................................................................. 6 3.2.6 Debris Quantity........................................................................................................................................... 6 3.2.7 Debris Introduction and Accumulation............................................................................................. 7 3.2.8 Tank Turbulence Level............................................................................................................................. 9 3.2.9 Penetrated Fiber Collection.................................................................................................................... 9 4
Test Protocols........................................................................................................................................................... 10 4.1 Overall Test Approach...................................................................................................................................... 10 4.2 Test Apparatus.................................................................................................................................................... 10 4.3 Fiber Preparation............................................................................................................................................... 10 4.4 Test Tank Preparation..................................................................................................................................... 10 4.5 Hydraulic Test Conditions.............................................................................................................................. 11 4.6 Test Control.......................................................................................................................................................... 11 4.7 Filter Bag Processing........................................................................................................................................ 12 5
Test Acceptance Criteria...................................................................................................................................... 12 6
Test Documentation and Records.................................................................................................................... 12 7
Debris Handling Requirements......................................................................................................................... 13 8
Quality Assurance Requirements..................................................................................................................... 13 9
References.................................................................................................................................................................. 13
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 iii List of Figures Figure 3.1 Single Pocket of CCNPP Strainer Module [1].......................................................................................... 2 Figure 3.2.1 - Debris Fraction Transported to Screen as a Function of Pool Turnover............................. 8 List of Tables Table 3.1 Dimensions of a Single CCNPP Strainer Module Pocket [1].......................................................... 2 Table 3.2 Small Scale Test Matrix................................................................................................................................. 4 Table 3.3 - Description of Fiber Classes........................................................................................................................ 5 Table 3.4 - Filter Change Schedule by Batch................................................................................................................ 8
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 iv ACRONYMS & ABBREVIATIONS CS CCNPP Containment Spray Calvert Cliffs Nuclear Power Plant ESF Engineered Safety Features GR NEI 04-07 Guidance Report GSI Generic Safety Issue HELB High Energy Line Break LBLOCA Large Break Loss of Coolant Accident LOCA Loss of Coolant Accident NEI Nuclear Energy Institute NPSH Net Positive Suction Head NRC Nuclear Regulatory Commission PTO Pool Turnover PWR Pressurized Water Reactor SER Safety Evaluation Report SI Safety Injection
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 1 of 13 1
PURPOSE To develop an understanding of downstream effects, prototypical strainer testing, will be performed to generate data that represents the quantity and physical characteristics of the debris that bypasses1 or penetrates the strainer. A reasonable vehicle for collecting such data is prototypical strainer testingCertain variables that may affect the quantity of debris that penetrates the strainer will be investigated through small-scale sensitivity tests. This document develops the plan for conducting fiber onlythese small-scale penetration testsing for determining the affect of fluid chemistry, fluid temperature, and fiber mixture on the quantity and characteristics of fibrous debris that can potentially penetrate the Calvert Cliffs Nuclear Power Plant (CCNPP) emergency recirculation suction strainer in a post-loss of coolant accident (LOCA) environment.
2 TEST OBJECTIVES The test objective is to determine the sensitivity of fluid chemistry, fluid temperature, and fiber mixture on the quantify and characterize theof fibrous insulation debris that would penetrates through the suction strainer during the safety injection (SI) and containment spray (CS) response timeline. Tests will be conducted to determine the quantity of fiber that can be expected to penetrate the strainer during operation. Tests will be structured to obtain data that can be used to develop an empirical tool that will allow CCNPP to determine the quantity of fiber expected to penetrate the strainer, with respect to the known range of operating parameters. A test report that will describe the testing and the methodology required for penetration analysis will accompany the testing results.
The testing will provide adequate data for CCNPP to determine the fiber penetration quantity and characteristics at specific times, for various plant conditions, during SI and CS operation.
These test objectives will be fulfilled in a two-stage test plan: small scale and large scale. Small scale testing, which is detailed in this document, will be used to determine fiber penetration sensitivity to fiber type, water temperature, and water chemistry. This small-scale sensitivity testing will influence the parameters and ranges varied during full large scale testing. Performing these small scale tests is required to define characteristics and parameters that will be used in the full large scale tests.
1 For the purpose of this document, by-pass and penetration refer to the same process. Throughout this document penetration will be used to refer to the phenomenon of a fiber penetrating the strainer perforated plate holes, instead of bridging the strainer perforated plate holes and forming a debris bed.
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 2 of 13 3
TECHNICAL APPROACH This section serves as an overview to outline the testing variables, the tests to be performed, and the general guidelines for test execution. An overview of sample preparation, filter preparation, and filter replacement is provided. However, instructions that are more detailed will be provided in the specific test procedures.
3.1 TEST MODULE Small scale testing will be performed using a test module comprised of individual pockets (See Figure 3.1 below) from a CCNPP strainer module. Four of these pockets will be arranged horizontally in a two by two configuration to form the small scale test module.
Figure 3.1 Single Pocket of CCNPP Strainer Module [1]
Table 3.1 Dimensions of a Single CCNPP Strainer Module Pocket [1]
Dimension in mm A
3.130 79.50 B
2.772 70.40 C
5.000 127.50 Radius R = A/2 1.565 39.75 The surface area of a single pocket is 0.5595 ft2 [1]
3.2 TEST VARIABLES To adequately and conservatively capture the various SI and CS operating modes and their effect on fiber penetration, numerous test variables have been defined. Variables in Table 3.2 are defined as fixed, correlation or screened. Fixed indicates factors than cannot be changed and will be a fixed parameter for the experiment. Screened variables will be tested to determine whether or not they
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 3 of 13 bare an effect on penetration and to choose an appropriate fixed value to use in full scale experiments. Correlation variables are those for which a correlation between the variable and penetration is desired. For each variable, a low (-), baseline (0) and high (+) value have been selected.
Table 3.2 - General Fiber Penetration Test Variable Summary Variable Variable Type
(-)
(0)
(+)
Strainer Geometry Fixed N/A As-Built N/A Approach Velocity Correlation 3.471e-04ft/sec 0.0018ft/sec 0.0124ft/sec Water Chemistry Screened Tap Water N/A Borated Buffered Water Temp Correlation 90 130 180 Fiber Type Screened Nukon N/A Cocktail2 Debris Size Fixed N/A NEI Class 2 N/A Debris Quantity Correlation 1/16 Bed N/A 1/2 Bed Debris Concentration Correlation Low N/A High The following non-fixedvariables factors will be addressed in small-scale strainer sensitivity penetration testing:
Fiber Type Water Chemistry Temperature The following non-fixed factors will be addressed in the full-scale strainer penetration testing:
Approach Velocity Debris Quantity Debris Concentration It is not practical to run replicate tests. Therefore, tThe design of the experiment will be a full factorial screening test based on minimum and maximum water temperature conditions. The results of these tests will be analyzed to determine the most appropriate fiber type and water chemistry with which to investigate the characteristics of the temperature influence. The combination of fiber type and water chemistry factors that had the most significant increase in penetration as a function of temperature will be run at 135°F.
2 The fiber cocktail will be formed using all four fibrous debris types found in CCNPP containment (See Section 3.2.1)
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 4 of 13 The test matrix below represents the 23 factorial design with a final test to investigate the characteristics of the temperature influence.
Table 3.2 Small Scale Test Matrix Run Fiber Type Water Chemistry Temperature 1
Nukon Tap 90°F 2
Cocktail Tap 90°F 3
Nukon Borated Buffer 90°F 4
Cocktail Borated Buffer 90°F 5
Nukon Tap 180°F 6
Cocktail Tap 180°F 7
Nukon Borated Buffer 180°F 8
Cocktail Borated Buffer 180°F 9
TBD TBD 135°F Determination of variable values is discussed below.
3.2.1 DEBRIS TYPES The following fibrous insulation types are present at CCNPP : Nukon, Thermal Wrap, Temp-Mat, Mineral Wool and latent fiber [2]. In the small scale testing, two debris options will be evaluated to determine if penetration is sensitive to fiber type. Debris batches comprised of Nukon-only fibers will be compared to a concoction of fibers including Nukon, Thermal Wrap, Temp-Mat, and Mineral Wool (Note that latent fiber is not listed, as it is assumed to be Nukon. [2]). The fiber cocktail will be a prototypical mixture, based on a bounding large break LOCA, and will contain amounts of each debris type in proportion to how much of that type can be found in CCNPP containment.
Note that, although particulate debris is present at CCNPP (Marinite debris, dirt/dust, and coatings), it will not be included in the penetration testing. This is reasonable because, as a fiber bed forms on the strainer, introduction of additional particulate would only serve to hasten bed formation and subsequently inhibit fiber penetration. In addition, if particulate was added to the test, much of the particulate would pass through the strainer and collect in the capture filters. This would prevent accurate measurements of the mass of fiber that would collect in the same filters.
3.2.2 DEBRIS SIZE All fibers shall be prepared in accordance with the NEI preparation protocol [3]. The NEI fibrous debris preparation protocol is considered to generate fibrous debris appropriate for penetration testing. To ensure that the quantity of each class of fibers is appropriate for testing, all fiber batches
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 5 of 13 must be subjected to visual scrutiny, verifying that there is not an excess of class 1 or class 3 fibers.
Where necessary, a light table should be used for inspection. Each batch should be photographed to document that the debris is mostly class 2 fibers. Table 3.4 below offers a description of each fiber type.
Table 3.3 - Description of Fiber Classes Class No.
Description 1
Very small pieces of fiberglass material, "microscopic" fines which appear to be cylinders of varying L/D.
2 A single flexible strand of fiberglass, essentially acts as a suspended strand.
3 Multiple attached or interwoven strands that exhibit considerable flexibility and which due to random orientations induced by turbulence drag could result in low fall velocities.
3.2.3 WATER CHEMISTRY Water chemistry in the small scale experiments will be tested using untreated tap water and buffered and borated, demineralized water. The buffered and borated solution will have an as-built NaTB concentration of 3.57 g/L, in addition to 0.75 ppm Li content [4]. This data reflects a best estimate LBLOCA water volume.
3.2.4 WATER TEMPERATURE The water temperatures tested will be bound by 90°F and 180°F. The low temperature of 90°F, was chosen as the minimum temperature at which a decrease in flotation of debris is still notable. The high temperature of 180°F was chosen because it approaches operating temperatures, without being so high that it significantly increases the risk of personal injury or damage to the testing apparatus.
The high and low temperatures will be used to determine whether there is or is not a sensitivity to water temperature. In the case that temperature is found to affect penetration, a test will be performed at an intermediate temperature to investigate the characteristics of the temperature effect
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 6 of 13 3.2.5 APPROACH VELOCITY (FLOW RATE)
Because of the unique CCNPP strainer array, significant approach velocity variations are observed as debris loads onto the strainer. A range of flow rates will be applied during full scale testing and a detailed analysis of how approach velocity affects penetration will be performed. However, during small scale testing, all experiments will be performed at the same approach velocity. That velocity will be the average approach velocity experienced across all modules of the CCNPP strainer.
The average approach velocity is the one derived from the total surface area and the total flow through the strainer. CCNPP has a strainer area of 6,060 ft2 and a maximum flow rate of 5,000 gpm
[1, p. 1]. This yields an average approach velocity of 0.0018 ft/sec.
Equation 1 below is used to determine the flow rate that will be used during testing to achieve the required approach velocity.
To achieve the average approach velocity, 0.0018 ft/sec, the flow rate through the test strainer must be:
4 0.5595
- 0.0018
0.133681
- 60
1.808 Equation 1 3.2.6 DEBRIS QUANTITY For conservatism in downstream effects evaluations, all particulate debris is assumed to penetrate the strainer. Fibrous debris will form a debris bed on the outside surface of the strainer, and a small quantity of the total fiber is expected to penetrate the strainer. As such, only the penetration of fibers needs to be experimentally quantified and characterized. The debris batch quantities are calculated as follows:
1/8 bed: The volume of fiber needed to generate a theoretical uniform 1/8 bed on the prototypical strainer is calculated as follows:
4 0.5595
- 12 1
- 1 8 40.28 Equation 2 For practical purposes, a nominal volume of 40.3 in3 will be used during testing.
1/16 bed: The volume of fiber needed to generate a theoretical uniform 1/16 bed on the prototypical strainer is calculated as follows:
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 7 of 13 4 0.5595
- 12 1
- 1 16 20.14 Equation 3 For practical purposes, a nominal volume of 20.1 in3 will be used during testing.
3.2.7 DEBRIS INTRODUCTION AND ACCUMULATION The interval between batches is based on consideration of the two processes by which penetration has been found to occur: direct penetration, which occurs within a short amount of time and fiber shedding, which occurs over a longer period, resulting from erosion of the fiber bed on the strainer.
In both cases, it is important to ensure that enough time is allotted for most of the debris to reach the strainer between batches. After debris has been introduced, assuming that the debris concentration in the flume is approximately homogeneous, and that water recirculating through the test flume is clean, the fraction of debris remaining in the pool as a function of pool turnovers can be reasonably approximated using Equation 10, below.
x(t) = x i
Equation 4 Where:
x(t) is the amount of debris in the pool a time t x(i) is the amount of debris in the pool at time t=0 Q is the break and spray flow rate Vpool is the test pool volume It can be seen that
is simply the pool turnover (PTO) time, i.e. the time it takes all the flume volume to pass through the screen. Because x(t) represents the debris in the pool, 1-x(t) reflects the amount of debris that has reached the strainer at time t. The values for 1-x(t) is plotted as a function of pool turnovers in Figure 3.1.2.
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 8 of 13 Figure 3.2.1 - Debris Fraction Transported to Screen as a Function of Pool Turnover Five pool turnovers are adequate to ensure that almost all debris in the tank has reached the strainer. This guidance can be implemented to provide reasonable assurance that the full volume of the test tank has flowed through the strainer. The multiple volume circulations of the test pool, combined with the use of mixing devices, will ensure that all debris reaches the strainer surfaces.
The following batching and filter change out sequence will be performed:
Table 3.4 - Filter Change Schedule by Batch Batch Batch Size Filter Changes 1
1/16 6 PTO 2
1/16 6 PTO 3
1/8 10 PTO The 1/16 theoretical equivalent debris bed thickness is considered the minimum fiber load to form a uniform debris bed; hence, it is the lowest batch size. The second batch is also the equivalent to the minimum fiber load required to form a uniform debris bed, and was selected to ensure strainer surface coverage by fiber. At these thin fiber bed thickness, the filter change out at 6 PTO was 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0
1 2
3 4
5 6
Debris Fraction Transported to Strainer Pool Turnovers
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 9 of 13 selected to allow enough time for all fiber to travel to the strainer module. After the third batch is introduced to the test tank, 10 PTO pass before the filter bag is removed. This is to capture not only the initial penetration burst, but to also capture the delayed penetration caused by release of fibers from the debris bed (shedding). Batch 3 is a 1/8 equivalent debris bed thickness, and was selected because the previous two batches will have covered the strainer completely, and this allows for speedier construction of a thick bed.
The strainer must be visually inspected and photographed (below the surface of the water) after introducing both the first and second batches, in order to verify that the strainer is completely covered. Should the strainer be only partially, not fully covered after introduction of the first two batches, additional 1/16 batches will be added until a debris bed covers the entire strainer.
3.2.8 TANK TURBULENCE LEVEL A level of turbulence agitation shall be provided by submerged mixing motors. The agitationse motors shall provide enough tank turbulence to suspend the debris above the test tank floor while not stripping fiber off of the strainer. It is necessary to keep debris in suspension during the test to ensure that all fiber debris reaches the strainer. This level of turbulence shall be maintained until the completion of each test.
3.2.9 PENETRATED FIBER COLLECTION Nominal 3-micron pore bags shall be used for fiber collection. Thermal Wrap and Mineral Wool have the smallest diameters (5.5 µm and 5-7 µm, respectively) of the fiber types used when testing a prototypical debris cocktail. Using finer mesh bags will ensure that the capture efficiency of the bags will be greater than the nominal value cited, which is developed based on particulates.
When bag changes are performed, the new bag should be valved into the line before the used bag is removed. This process is to mitigate loss of bypassed fibers during bag changes.
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 10 of 13 4
TEST PROTOCOLS 4.1 OVERALL TEST APPROACH The overall test approach will be to add a fiber batch into the test tank and allow the debris to transport to a prototype strainer module. The filter system will be configured with multiple elements in parallel to allow undisturbed flow through the strainer as flow is diverted between the filters. The weight gain of the filter bags shall be analyzed to measure and characterize the fiber penetration.
4.2 TEST APPARATUS The test tank shall allow for the measurement and control of all facility relevant flow rates.
Differential pressure across the strainer and differential pressure across the filter bag assembly shall be able to be measured in real-time. The water downstream of the strainer shall be passed through the filters before passing through the pump and being transported back into the tank.
Mixing motors shall provide enough turbulence to prevent debris from settling in the tank. Upon selection of the test apparatus, this section will be enhanced.
4.3 FIBER PREPARATION All fibrous debris preparation shall follow the NEI protocol [3]. This procedure produces the required size distribution of fiber fines that are easily transportable and readily dispersed in the test tank.
Each batch prepared should be inspected to verify that there is not an excess of class 1 or class 3 fines. Photographs should be taken for each batch, documenting that the majority of the content is class 2 fines. Additionally, the fiber size distribution of at least one Nukon sample and one cocktail sample should be measured for analysis and comparison concerning the results of the small scale testing.
4.4 TEST TANK PREPARATION Before any test, the preparatory steps below should be performed to ensure the loop is clean and the test equipment is functioning properly.
The Test Tank must be thoroughly cleaned prior to each test to prevent contamination of the filter bags.
To remove all residual debris from the test loop, the test loop should be filled with the appropriate type of water, at the appropriate temperature, and then recirculated through a
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 11 of 13 clean facility verification bag for a minimum of 10 pool turnovers, at a flow rate 10% higher than the rate at which the tests will be performed.
Ensure the data gathering system is functioning properly: take and record baseline measurements with each instrument that will be used during testing,.
The tank flow rate will then be lowered to the test flow rate and redirected to a new filter.
The fiber will be added in accordance with the test matrix.
4.5 HYDRAULIC TEST CONDITIONS Testing shall be conducted per the Test Matrix. The hydraulic conditions are maintained by controlling the test flow rate to within +5/-0% of the prescribed flow rate.
4.6 TEST CONTROL All testing actions and control must be noted in the test log. This includes flow adjustments, water sampling, debris addition (beginning and completion), agitating (including the duration of the stir),
filter removal and installation, and all other acts that affect the testing environment. The test logs shall describe critical information about the test without recourse to the test engineer.
Adjustments and flow alignments may induce flow variations. However, the flow rate of the system shall be maintained to ensure debris remains on the strainer without excessive bed disturbance.
Debris shall not be allowed to settle in the test tank. If debris settling begins to occur, additional agitation is required to ensure that non-representative debris settling is minimized. A paddle may be used to suspend settled debris, although agitation must not disturb the debris bed on or around the strainer. If settled debris is found resistant to manual stirring, it shall be collected and reintroduced. Small quantities of settled debris remaining on the floor area shall be photographed, noted in the test log, and collected to be dried and weighed.
Any floating debris is to be collected from the water surface without disturbing the strainer debris bed and re-introduced to the test in the same manner as the bulk batch. Very small residual floating debris quantities may be collected for drying and weighing to determine the amount of fiber that was removed from the test. The total batch amount added to the test will be adjusted by the collected debris weight for the determination of the penetration fraction, or determination of amount of penetrated debris.
Water temperature shall be controlled at the test temperature (+/-5%) during testing.
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 12 of 13 4.7 FILTER BAG PROCESSING The filter bags will be dried in ovens prior to and after testing. The penetrated fiber weight gain will be measured with analytical balances verified daily with calibrated mass sets, with accuracy to one thousandth of a gram. The physical characteristics of the fiber penetration will be analyzed via microscopy, including the application of a scanning electron microscope for fiber length measurements and imaging.
Three-micron polyester felt bags with a temperature rating above the drying temperature of the oven shall be used to capture penetrated fiber. The filter bags shall be inspected for tears or damage and photographed. Each filter bag should be labeled with an identifier (A, B, etc.) on the cloth handle, and a drying log should be initialized for each upon placing into an oven. Once placed in the oven, the temperature must be maintained at 200°F for a sufficient period to ensure that bags are dried. The filter bags will be considered dry when the filter weight change is less than 0.05 g across three consecutive measurements taken no less than 45 minutes apart. Upon this stable measurement, the bag should be removed from the oven and placed in a clean, labeled sample bag until testing. This process must be repeated for all filter bags used in testing.
5 TEST ACCEPTANCE CRITERIA In accordance with the test objective, the acceptance criterion for this testing is to conduct the fiber penetration test in accordance with the test matrix and applicable test procedures outlined in this document and to successfully collect and record data. The flow rate for the duration of the test has to be maintained above that designated as the target for the test. The weight gain measured in the clean facility verification filter bags shall be less than 0.05g.
6 TEST DOCUMENTATION AND RECORDS The test matrix provides the guidance as to the characteristics of the tests currently planned. A test procedure directing the specified tests to be implemented will be developed by the test facility and approved by CCNPP Project Management. This procedure shall require signature documentation for the performance and witnessing of critical steps. A logbook will be dedicated to the testing and will be used to record observations as required by the test procedure. It will include written documentation of the test conditions, providing a back-up test record to the electronic data acquisition record.
A Test Equipment Verification Procedure shall provide the means to verify the calibration and setup of each instrument used for testing, to ensure accurate data acquisition. Furthermore, the procedure shall be conducted immediately after the conclusion of testing to check for instrument failure or inaccuracies produced during testing.
Debris By-Pass/Penetration Small Scale Test Plan for Calvert Cliffs Nuclear Power Plant CCNPP-BPPlan-002 Revision 0E, November 11, 2013 Page 13 of 13 A test report documenting the results of the test will be prepared. The test report will include the results of penetration sensitivity to debris type, water chemistry and water temperature.
7 DEBRIS HANDLING REQUIREMENTS This test plan identifies a test matrix using fiberglass insulation. All appropriate MSDS should be followed and care should be taken when handling the insulation.
8 QUALITY ASSURANCE REQUIREMENTS CCNPP requires the test program to be performed in accordance with an approved quality assurance program that meets the requirements of 10 CFR 50 Appendix B and 10 CFR Part 21.
9 REFERENCES
[1] CCI, Calculation CA06923 (3 SA-096.080), Head Loss Caclulation for Clean and Debris Laden Screen, Revision 05: May 06, 2009.
[2] Calculation CNSCCO16-CALC-002, Revision 0B, Calvert Cliffs Debris Generation Calculation, 2013.
[3] CA06485 Determination of Insulation Debris Loads on Emergency Sump Strainer, Revision 0003, April 3, 2009.
[4] TBD for water chemistry values.