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| | number = ML120540816 | | | number = ML120540816 |
| | issue date = 02/23/2012 | | | issue date = 02/23/2012 |
| | title = South Texas Project, Units 1 and 2 - Experimental Setup for Chle Test Equipment | | | title = Experimental Setup for Chle Test Equipment |
| | author name = Howe K | | | author name = Howe K |
| | author affiliation = South Texas Project Nuclear Operating Co, - No Known Affiliation | | | author affiliation = South Texas Project Nuclear Operating Co, - No Known Affiliation |
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| {{#Wiki_filter:2/9/2012 Teleconference: CHLE Test Equipment Page 1 of 6 Experimental Setup for Chemical Head Loss Experiment (CHLE) Test Equipment Kerry How e February 09, 2012 During the Chemical Effects Summit held in the Nuclear Energy Institute offices on January 26 and 27, 2012, the Chemical Head Loss Experiment (CHLE) test equipment design was presented and discussed. This document describes the status of the design of this equipment and reflects input received from the NRC during the meeting and continued progress on the equipment design by the STP team. The test apparatus for the 30 | | {{#Wiki_filter:Experimental Setup for Chemical Head Loss Experiment (CHLE) Test Equipment Kerry Howe February 09, 2012 During the Chemical Effects Summit held in the Nuclear Energy Institute offices on January 26 and 27, 2012, the Chemical Head Loss Experiment (CHLE) test equipment design was presented and discussed. This document describes the status of the design of this equipment and reflects input received from the NRC during the meeting and continued progress on the equipment design by the STP team. The test apparatus for the 30-day integrated tank tests has two main sections, as follows: |
| -day integrated tank tests has two main sections, as follows: | |
| : 1. Material corrosion tank where materials present in containment can be placed to simulate the environment inside the containment structure during a LOCA. | | : 1. Material corrosion tank where materials present in containment can be placed to simulate the environment inside the containment structure during a LOCA. |
| : 2. Vertical head loss assemblies to simulate the flow conditions through a debris bed that forms on a sump screen. | | : 2. Vertical head loss assemblies to simulate the flow conditions through a debris bed that forms on a sump screen. |
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| A general schematic of the equipment is shown in Figure 1. The following sections describe detail on scaling parameters that will be used in the design and operation of the equipment and details of the equipment. | | A general schematic of the equipment is shown in Figure 1. The following sections describe detail on scaling parameters that will be used in the design and operation of the equipment and details of the equipment. |
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| Figure 2 - Simplified Process Flow Diagram of the CHLE Test Equipment | | Figure 2 - Simplified Process Flow Diagram of the CHLE Test Equipment |
| : 1. CHLE Loop Design and Scaling to the STP System | | : 1. CHLE Loop Design and Scaling to the STP System 2/9/2012 Teleconference: CHLE Test Equipment Page 1 of 6 |
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| 2/9/2012 Teleconference: CHLE Test Equipment Page 2 of 6 Recirculation volume: The recirculation volume is the primary scaling parameter between the STP and CHLE systems. The nominal CHLE Loop volume is 250 gallons. The STP recirculation volume maximum is 668,000 gallons and minimum is 363,000 gallons. These values provide scaling parameters (STP:CHLE) of 2,670 (max) to 1,450 (min).
| | Recirculation volume: The recirculation volume is the primary scaling parameter between the STP and CHLE systems. The nominal CHLE Loop volume is 250 gallons. The STP recirculation volume maximum is 668,000 gallons and minimum is 363,000 gallons. These values provide scaling parameters (STP:CHLE) of 2,670 (max) to 1,450 (min). |
| Sump strainer surface area: The CHLE loop has 3 parallel strainer assemblies each with a diameter of 6 inches, for a total strainer area of 0.59 ft | | Sump strainer surface area: The CHLE loop has 3 parallel strainer assemblies each with a diameter of 6 inches, for a total strainer area of 0.59 ft2. The STP strainers have area of 1,815.5 ft2 per train. Using the scaling parameter for the maximum recirculation volume would require a total strainer area of 0.68 ft2. Scaling to the minimum recirculation would require a total screen area of 1.25 ft2. Thus, the CHLE system approximates the STP system at maximum pool volume with one strainer in operation. The flow in the CHLE system will pass through an area about 14 percent smaller than the area of one strainer in the STP system, which increases the mass loading per unit area over what would occur on the STP strainers. With 2 strainer trains operating at STP, the mass loading on the STP strainers will be less than half the mass loading on the CHLE system. By using a mass loading somewhat greater than the STP system, the CHLE system provides a conservative assessment of the effect of chemical precipitates on head loss. |
| : 2. The STP strainers have area of 1,815.5 ft 2 per train. Using the scaling parameter for the maximum recirculation volume would require a total strainer area of 0.68 ft
| | Sump strainer loading rate: The minimum and maximum strainer flow rates are 1,620 gpm and 7,020 gpm, respectively. These rates correspond to filtration rates of 0.89 to 3.86 gpm/ft2 or approach velocities of 0.0020 to 0.0086 ft/s. The CHLE tests will be conducted at the maximum flowrate, thus, the flowrate to each CHLE strainer will be 0.76 gpm. The total to the 3 strainer assemblies will be 2.28 gpm. |
| : 2. Scaling to the minimum recirculation would require a total screen area of 1.25 ft
| | Recirculation time: At the maximum pool volume in the STP system, the recirculation time is 95 minutes at maximum flow through one strainer and 410 minutes at minimum flow through one strainer. At the minimum pool volume in the STP system, the recirculation time is 52 minutes at maximum flow through one strainer and 224 minutes at minimum flow through one strainer. Recirculation times would be decreased accordingly if 2 strainer trains were operating. |
| : 2. Thus, the CHLE system approximates the STP system at maximum pool volume with one strainer in operation. The flow in the CHLE system will pass through an area about 14 percent smaller than the area of one strainer in the STP system, which increase s the mass loading per unit area over what would occur on the STP strainers. With 2 strainer trains operating at STP, the mass loading on the STP strainers will be less than half the mass loading on the CHLE system. By using a mass loading somewhat greater than the STP system, the CHLE system provides a conservative assessment of the effect of chemical precipitates on head loss.
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| Sump strainer loading rate: | |
| The minimum and maximum strainer flow rates are 1,620 gpm and 7,020 gpm, respectively. Th e s e rates correspond to filtration rates of 0.89 to 3.86 gpm/ft 2 or approach velocities of 0.0020 to 0.0086 ft/s. The CHLE tests will be conducted at the maximum flowrate, thus, the flowrate to each CHLE strainer will be 0.76 gpm. The total to the 3 strainer assemblies will be 2.28 gpm. | |
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| Recirculation time: At the maximum pool volume in the STP system, the recirculation time is 95 minutes at maximum flow through one strainer and 410 minutes at minimum flow through one strainer. At the minimum pool volume in the STP system, the recirculation time is 52 minutes at maximum flow through one strainer and 224 minutes at minimum flow through one strainer. Recirculation times would be decreased accordingly if 2 strainer trains were operating. | |
| At 250 gallons and a flow rate of 2.28 gpm, the recirculation time through the strainers in the CHLE loop would be 110 minutes. Thus, the recirculation times in the CHLE system are within the boundaries of the recirculation times in the STP containment. | | At 250 gallons and a flow rate of 2.28 gpm, the recirculation time through the strainers in the CHLE loop would be 110 minutes. Thus, the recirculation times in the CHLE system are within the boundaries of the recirculation times in the STP containment. |
| | Chemicals and materials: Chemicals and materials will be added to maintain the same (quantity)/(recirculation volume) ratios as the STP plant. Chemicals will be based on concentration (mass/volume). Metals, concrete, and coatings will be based on surface area/volume. Insulation debris will be based on volume/volume. |
| | : 2. Material Corrosion Tank The material corrosion tank is shown in Figure 2. The physical attributes of this tank are as follows: |
| | 2/9/2012 Teleconference: CHLE Test Equipment Page 2 of 6 |
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| Chemicals and materials:
| | Figure 2 - Photograph of 30-Day Integrated Corrosion Head Loss Test Tank |
| Chemicals and materials will be added to maintain the same (quantity)/(recirculation volume) ratios as the STP plant. Chemicals will be based on concentration (mass/volume). Metals, concrete, and coatings will be based on surface area/volume. Insulation debris will be based on volume/volume.
| | : 1. The tank is nominally 4 ft x 4 ft x 6.6 ft in height, with vertical sides and a bottom that slopes to a centrally-located discharge port and 3 polycarbonate view windows. |
| : 2. Material Corrosion Tank The material corrosion tank is shown in Figure 2. The physical attributes of this tank are as follows:
| | : 2. The tank is divided into upper and lower sections. The lower section is designed to accommodate 250 gal. of solution and all materials that may be submerged in containment and contribute to chemical effects. The tank contains flow injection headers below the water line on the north and south walls, which are designed to provide turbulence in the tank pool and achieve a uniform flow pattern across the submerged coupons with velocities in the 0-3 cm/s range. The injection headers are 1-in.-diameter pipe with a symmetric pattern of holes to distribute the solution discharge. The necessary flow patterns are achieved when the recirculation pump operates at 25 gpm. Flow is controlled manually with a variable speed drive on the pump and a throttle valve. |
| 2/9/2012 Teleconference: CHLE Test Equipment Page 3 of 6 Figure 2 - Photograph of 30
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| -Day Integrated Corrosion Head Loss Test Tank | |
| : 1. The tank is nominally 4 ft 4 ft 6.6 ft in height, with vertical sides and a bottom that slopes to a centrally | |
| -located discharge port and 3 polycarbonate view windows. | |
| : 2. The tank is divided into upper and lower sections. The lower section is designed to accommodate 250 gal. of solution and all materials that may be submerged in containment and contribute to chemical effects. The tank contains flow injection headers below the water line on the north and south walls, which are designed to provide turbulence in the tank pool and achieve a uniform flow pattern across the submerged coupons with velocities in the 0-3 cm/s range. | |
| The injection headers are 1-in.-diameter pipe with a symmetric pattern of holes to distribute the solution discharge. | |
| The necessary flow patterns are achieved when the recirculation pump operates at 25 gpm. Flow is controlled manually with a variable speed drive on the pump and a throttle valve. | |
| : 3. The upper section is designed to accommodate all materials that may be in the vapor space in containment and contribute to chemical effects by being exposed to containment sprays. | | : 3. The upper section is designed to accommodate all materials that may be in the vapor space in containment and contribute to chemical effects by being exposed to containment sprays. |
| Spray nozzles are located in the four corners near the top of the vapor space. | | Spray nozzles are located in the four corners near the top of the vapor space. |
| : 4. The tank is insulated and contains two titanium-jacketed rod-type heaters in the tank pool to maintain the temperature of the solution at a maximum of 185 °F with a range of +/- 5 °F. The heaters are fully redundant; either can provide the required heating capacity so that experiments can continue in the event of failure of a single heater. | | : 4. The tank is insulated and contains two titanium-jacketed rod-type heaters in the tank pool to maintain the temperature of the solution at a maximum of 185 °F with a range of +/- 5 °F. The heaters are fully redundant; either can provide the required heating capacity so that experiments can continue in the event of failure of a single heater. |
| : 5. A recirculation pump withdraws solution from the bottom discharge port, circulates it through the instrumentation pipe loop and supplies it the vertical head loss assemblies, and reintroduces it into the material corrosion tank through the upper spray nozzles or lower flow injection headers. Throttle valves and flow meters allow the flow to be apportioned to the 2/9/2012 Teleconference: CHLE Test Equipment Page 4 of 6 spray nozzles and flow injection headers at the proper rates. The instrumentation pipe loop contains a flow meter, pressure gage, temperature sensor, pH meter, and sample port. Flow, temperature, and pH are recorded continuously by a data acquisition system, temperature is reported locally. | | : 5. A recirculation pump withdraws solution from the bottom discharge port, circulates it through the instrumentation pipe loop and supplies it the vertical head loss assemblies, and reintroduces it into the material corrosion tank through the upper spray nozzles or lower flow injection headers. Throttle valves and flow meters allow the flow to be apportioned to the 2/9/2012 Teleconference: CHLE Test Equipment Page 3 of 6 |
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| | spray nozzles and flow injection headers at the proper rates. The instrumentation pipe loop contains a flow meter, pressure gage, temperature sensor, pH meter, and sample port. Flow, temperature, and pH are recorded continuously by a data acquisition system, temperature is reported locally. |
| : 6. The tank is constructed of type 304 stainless steel. | | : 6. The tank is constructed of type 304 stainless steel. |
| : 7. A removable cover and gantry crane allow for placing and removing samples. | | : 7. A removable cover and gantry crane allow for placing and removing samples. |
| : 3. Vertical head loss assemblies A schematic of the piping systems for the test equipment, including the vertical head loss assemblies, is shown in Figure | | : 3. Vertical head loss assemblies A schematic of the piping systems for the test equipment, including the vertical head loss assemblies, is shown in Figure 3. The physical attributes of the vertical head loss assemblies and piping systems are as follows: |
| : 3. The physical attributes of the vertical head loss assemblies and piping syste ms are as follows:
| | : 1. The system will contain 3 identical vertical head loss assemblies, operated in parallel. Each consists of a 6-in diameter pipe assembly. The upper and lower portions of the pipe assembly are constructed of Sch 80 chlorinated polyvinyl chloride (CPVC) pipe. The middle section is constructed of 1/8-in thick polycarbonate to allow view of the debris bed. A schematic of the head loss assembly is shown in Figure 3. |
| : 1. The system will contain 3 identical vertical head loss assemblies, operated in parallel. Each consists of a 6 | | : 2. The polycarbonate section will be 18-in long, with a support ring located 6-in from the bottom to support a perforated plate. This section allows a view of 6 inches below the debris bed and 12 inches above the debris bed. The top and bottom sections of the polycarbonate section will be flanged so that they can be removed from the piping system to allow the debris bed to be removed from the head loss assembly intact. |
| -in diameter pipe assembly. The upper and lower portions of the pipe assembly are constructed of Sch 80 chlorinated polyvinyl chloride (CPVC) pipe. The middle section is constructed of 1/8 | | Figure 3 - Head Loss Assembly 2/9/2012 Teleconference: CHLE Test Equipment Page 4 of 6 |
| -in thick polycarbonate to allow view of the debris bed. A schematic of the head loss assembly is shown in Figure 3. | | : 3. Air vents will be located immediately below the support ring to allow gas to be vented from below the debris bed and at the top of the assembly. |
| : 2. The polycarbonate section will be 18 | | : 4. The supply and discharge piping to each head loss assembly will be 1/2-in stainless steel (type 316) pipe, with either threaded or compression fittings. |
| -in long, with a support ring located 6 | |
| -in from the bottom to support a perforated plate. This section allows a view of 6 inches below the debris bed and 12 inches above the debris bed. The top and bottom sections of the polycarbonate section will be flanged so that they can be removed from the piping system to allow the debris bed to be removed from the head loss assembly intact. | |
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| Figure 3 - Head Loss Assembly | |
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| 2/9/2012 Teleconference: CHLE Test Equipment Page 5 of 6 3. Air vents will be located immediately below the support ring to allow gas to be vented from below the debris bed and at the top of the assembly. | |
| : 4. The supply and discharge piping to each head loss assembly will be 1/2 | |
| -in stainless steel (type 316) pipe, with either threaded or compression fittings. | |
| : 5. The supply piping to each head loss assembly will have a tee to allow solution to be supplied from the material corrosion tank or from the bed formation recirculation loop (described below, see item 8). Each leg will have a ball valve for isolation. | | : 5. The supply piping to each head loss assembly will have a tee to allow solution to be supplied from the material corrosion tank or from the bed formation recirculation loop (described below, see item 8). Each leg will have a ball valve for isolation. |
| : 6. The supply piping to each head loss assembly coming from the material corrosion tank will have an insertion-style magnetic flow meter | | : 6. The supply piping to each head loss assembly coming from the material corrosion tank will have an insertion-style magnetic flow meter. |
| . 7. The discharge piping from each head loss assembly will have a tee to allow solution to be returned to the material corrosion tank or to the bed formation recirculation loop. The leg to the material corrosion tank will have a globe valve for flow control and the leg to the bed formation recirculation loop will have a ball valve for isolation. The globe valve will also provide backpressure to prevent or minimize degassing below the debris bed due to negative pressure in the head loss assembly.
| | : 7. The discharge piping from each head loss assembly will have a tee to allow solution to be returned to the material corrosion tank or to the bed formation recirculation loop. The leg to the material corrosion tank will have a globe valve for flow control and the leg to the bed formation recirculation loop will have a ball valve for isolation. The globe valve will also provide backpressure to prevent or minimize degassing below the debris bed due to negative pressure in the head loss assembly. |
| : 8. A separate debris bed formation recirculation loop is configured to be part of the piping system. The bed formation recirculation loop will have a pump, ball valve for throttling, and rotometer. All piping in the bed formation recirculation loop will be 3/4 | | : 8. A separate debris bed formation recirculation loop is configured to be part of the piping system. The bed formation recirculation loop will have a pump, ball valve for throttling, and rotometer. All piping in the bed formation recirculation loop will be 3/4-in SS pipe. The bed formation recirculation loop will have a supply header and a return header so that it can provide solution to each of the three head loss assemblies independently of the others. Each head loss assemblies will have ball valves in the supply and return lines for isolation. The debris bed formation recirculation loop will have connections for filling and draining the line, equipped with ball valves and hose bibb connections. |
| -in SS pipe. The bed formation recirculation loop will have a supply header and a return header so that it can provide solution to each of the three head loss assemblies independently of the others. Each head loss assemblies will have ball valves in the supply and return lines for isolation. The debris bed formation recirculation loop will have connections for filling and draining the line, equipped with ball valves and hose bibb connections. 9. The piping system will have a separate loop to do thermal cycling. This loop will have a cooling system to reduce the temperature. Following the heat exchanger will be a reservoir to provide holding time at the lower temperature. The cooled fluid will flow through a system to detect precipitates (possibly a laboratory filter with a DP cell across it). On the discharge side of the precipitation detector will be a heating system to return the fluid to the temperature of the tank. | | : 9. The piping system will have a separate loop to do thermal cycling. This loop will have a cooling system to reduce the temperature. Following the heat exchanger will be a reservoir to provide holding time at the lower temperature. The cooled fluid will flow through a system to detect precipitates (possibly a laboratory filter with a DP cell across it). On the discharge side of the precipitation detector will be a heating system to return the fluid to the temperature of the tank. |
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| A process flow diagram for the overall system is shown in Figure 4. | | A process flow diagram for the overall system is shown in Figure 4. |
| | 2/9/2012 Teleconference: CHLE Test Equipment Page 5 of 6 |
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| 2/9/2012 Teleconference: CHLE Test Equipment Page 6 of 6 Figure 4 - Process Flow Diagram of 30 | | Figure 4 - Process Flow Diagram of 30-Day Integrated CHLE Test System 2/9/2012 Teleconference: CHLE Test Equipment Page 6 of 6}} |
| -Day Integrated CHLE Test System}}
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Letter Sequence Other |
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Administration
- Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting
Results
Other: ML120540570, ML120540610, ML120540667, ML120540727, ML120540816, ML120610068, ML120610074, ML120610102, ML12145A438, ML12145A466, ML12335A174, ML12335A177
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MONTHYEARML1200901012012-01-10010 January 2012
Notice of Forthcoming Public Meeting Via Conference Call with South Texas Project Nuclear Operating Company
Project stage: Meeting
ML1204400602012-01-26026 January 2012
Summary of January 12, 2012 Chemical Effects Meeting
Project stage: Request
ML1203003642012-02-0202 February 2012
3/8/12 Forthcoming Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, U
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ML1203400432012-02-0303 February 2012
Notice of Forthcoming Meeting Via Conference Call with STP Nuclear Operating Company
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ML1204400612012-02-0808 February 2012
Email Licensee Slides for 2/9/12 Public Meeting Via Conference Call
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Actions Taken to Resolved Pirt Items
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ML1204400652012-02-0909 February 2012
Licensee Slides for 2/9/12 Meeting Regarding GSI-191
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ML1205406672012-02-22022 February 2012
Casa Grande Summary
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ML1205405092012-02-22022 February 2012
Email Meeting Materials for March 1, 2012 Conference Call
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ML1205406102012-02-22022 February 2012
Email Casa Grande Summary
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ML1205406942012-02-22022 February 2012
Email Additional Meeting Materials for the 3/01/12 Meeting to Discuss GSI- 191
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ML1205407582012-02-22022 February 2012
STP Summary of January Meeting
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ML1205405572012-02-22022 February 2012
Licensee Slides for 03/1/12 Meeting with STP Nuclear Operating Company Meeting to Discuss GSI-191
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Uncertainty Modeling of LOCA Frequencies and Break Size Distributions for the STP GSI-191 Resolution
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ML1205406042012-02-22022 February 2012
Meeting Materials for 3/1/12 Conference Call
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ML1205408162012-02-23023 February 2012
Experimental Setup for Chle Test Equipment
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ML1205407842012-02-23023 February 2012
Email Documents Transmitted for March 1, 2012 Meeting
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Southtexas Project, Units 1 and 2 - Test Plan for STP High Temperature Vertical Loops Testing
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ML1206100632012-02-29029 February 2012
Intro for March 8, 2012 Public Meeting to Discuss GSI-191
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Proposed STP Strainer Fiber Bypass Test Protocol
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ML1206100742012-02-29029 February 2012
Corrosion Head Loss Experiments Test Program
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ML1206205412012-03-0606 March 2012
2/9/12 Summary of Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Un
Project stage: Meeting
ML1207400312012-03-15015 March 2012
3/29/12 Notice of Meeting Viaconference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for Units 1 and 2
Project stage: Meeting
ML1208300862012-03-29029 March 2012
Summary of Meeting by Conference Call with STP Nuclear Operating Co. to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 & 2
Project stage: Meeting
ML1208301032012-03-30030 March 2012
3/1/12 Summary of Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Un
Project stage: Meeting
ML1210800062012-05-0404 May 2012
Staff Comments and Questions Related to Review of STP Nuclear Operating Company'S Report Entitled, Risk-Informed Resolution of GSI-191 at South Texas Project, Discussed at Public Meeting on 3/1/12 (TAC ME7735-36)
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ML12145A4382012-05-18018 May 2012
Licensee Handout on Calibration and Benchmarking of Single and Two-Phase Jet Cfd Models
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ML12145A3122012-05-18018 May 2012
E-mail Documents for Public Meeting on LOCA Frequency and Jet Formation
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ML12145A4662012-05-18018 May 2012
Loca-Hybrid-Final
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ML12146A0202012-05-31031 May 2012
Notice of 6/11/12 Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Unit
Project stage: Meeting
ML1213805222012-05-31031 May 2012
3/29/12 Summary of Conference Call Meeting with STP Nuclear Operating Company, Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units
Project stage: Meeting
ML12187A0812012-07-11011 July 2012
Summary of 6/11/12 Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Uni
Project stage: Meeting
ML12234A6042012-08-21021 August 2012
Email - Documents for NRC Public Meeting on Corrosion Head Loss Experiments (Chle) Part 1 and 2
Project stage: Meeting
ML12227A5902012-08-23023 August 2012
9/6/2012 Notice of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Uni
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ML12243A4742012-08-30030 August 2012
Email - Risk-Informed Approach to GSI-191, STP Cfd Data Analysis Report - Bypass Test Protocol
Project stage: Acceptance Review
ML12261A3012012-09-21021 September 2012
Notice of Forthcoming Public Meeting Via Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach
Project stage: Meeting
ML12270A0552012-10-0404 October 2012
9/6/2012 Summary of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Un
Project stage: Meeting
ML12300A2972012-11-0808 November 2012
Summary of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and
Project stage: Meeting
ML12321A1222012-11-20020 November 2012
12/3/12 Notice of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Unit
Project stage: Meeting
ML12335A1902012-11-26026 November 2012
Licensee Documents for December 12, 2012 Public Meeting
Project stage: Meeting
ML12335A1842012-11-26026 November 2012
Licensee Documents for December 12, 2012 Public Meeting
Project stage: Meeting
ML12335A1772012-11-26026 November 2012
- Licensee Documents ALION-CAL-STP for 12-10-12 Public Telecon GSI-191
Project stage: Other
ML12335A1742012-11-26026 November 2012
Email Licensee Documents for 12-10-12 Public Telecon GSI-191
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ML12331A2922012-11-27027 November 2012
Notice of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 and
Project stage: Meeting
ML12340A1352012-11-27027 November 2012
Meeting Notice by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution South Texas Project, Units 1 and 2
Project stage: Meeting
ML12341A1702012-12-20020 December 2012
12/3/12 Summary of Meeting by Conference Call with STP Nuclear Operating Company; Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Uni
Project stage: Meeting
ML13004A4012013-01-31031 January 2013
Summary of Meeting by Conference Call with STP Nuclear Operating Company to Discuss Risk-Informed GSI-191, Assessment of Debris Accumulation on Pressurized-Water Reactor (PWR) Sump Performance, Resolution Approach for South Texas, Units 1 &
Project stage: Meeting
2012-02-08
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Category:Report
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Supplemental Information to Application for Order Approving Indirect Transfer of Control of Licenses
ML23229A4992023-08-17017 August 2023
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NOC-AE-21003841, Request for Relief from ASME Section Xl Code Requirements for Weld Examinations (Relief Request RR-ENG-3-25)2021-09-23023 September 2021
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ML21266A4262021-09-23023 September 2021
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Commitment Change Summary Report
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Attachment 2 to Safety Evaluation - In-Vessel Thermal-Hydraulic Analysis, Issuance of Amendment Nos. 212 and 198 - Risk-Informed Approach to Resolve Generic Safety Issue 191
NOC-AE-17003468, 10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes2017-05-10010 May 2017
10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes
ML16302A0152016-10-20020 October 2016
South Texas Project, Units 1 & 2 - Supplement 3 to Revised Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Address Generic Safety Issue (GSl)-191 and Respond to Generic Letter (GL) 2004-02
NOC-AE-16003345, LTR-PAFM-16-11-NP, Revision 0, Technical Justification to Support Extended Volumetric Examination Interval for South Texas, Unit 2 Reactor Vessel Inlet Nozzle to Safe End Dissimilar Metal Welds.2016-03-31031 March 2016
LTR-PAFM-16-11-NP, Revision 0, Technical Justification to Support Extended Volumetric Examination Interval for South Texas, Unit 2 Reactor Vessel Inlet Nozzle to Safe End Dissimilar Metal Welds.
NOC-AE-15003249, Submittal of 10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes and Annual Report2015-06-0909 June 2015
Submittal of 10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes and Annual Report
ML14357A1362015-01-22022 January 2015
Review of Analysis of Capsule Withdrawal Schedule from Reactor Vessel Radiation Surveillance Program
NOC-AE-14003190, Attachment 2 to NOC-AE-14003190 - ALION-REP-STP-8998-14, Strainer Test Plan in Support of STP Pilot Risk-Informed GSI-191 Pilot Licensing Application2014-10-30030 October 2014
Attachment 2 to NOC-AE-14003190 - ALION-REP-STP-8998-14, Strainer Test Plan in Support of STP Pilot Risk-Informed GSI-191 Pilot Licensing Application
ML14344A5462014-10-30030 October 2014
Attachment 1 to NOC-AE-14003190 - Alion REP-STP-8998-13, Strainer Test Plan in Support of STP Pilot Risk-Informed GSI-191 Pilot Licensing Application Executive Summary
NOC-AE-14003178, Update Foreign Ownership, Control, or Influence (FOCI)2014-09-17017 September 2014
Update Foreign Ownership, Control, or Influence (FOCI)
NOC-AE-14003161, Engineering Report 1060, Rev. 1, Meter Factor Calculation & Accuracy Assessment for South Texas Project Units 1 & 2.2014-08-31031 August 2014
Engineering Report 1060, Rev. 1, Meter Factor Calculation & Accuracy Assessment for South Texas Project Units 1 & 2.
ML14260A4382014-08-31031 August 2014
Engineering Report ER-1059, Rev. 1, Bounding Uncertainty Analysis for Thermal Power Determination at South Texas Project Units 1 & 2 Using LEFM System.
NOC-AE-14003101, Enclosure 1 to Enclosure 6 Concerning Second Set of Responses to April 2014, Requests for Additional Information Regarding STP Risk-Informed GSI-191 Application2014-06-25025 June 2014
Enclosure 1 to Enclosure 6 Concerning Second Set of Responses to April 2014, Requests for Additional Information Regarding STP Risk-Informed GSI-191 Application
ML14168A2682014-05-0101 May 2014
Texas Pollutant Discharge Elimination System Major Amendment with Renewal Application for a Major Facility Tpdes Permit No. WQ000190800
NOC-AE-14003103, University of Texas White Paper, Means of Aggregation and NUREG-1829: Geometric and Arithmetic Means, Rev. 3, Enclosure 2 to Attachment 12014-04-18018 April 2014
University of Texas White Paper, Means of Aggregation and NUREG-1829: Geometric and Arithmetic Means, Rev. 3, Enclosure 2 to Attachment 1
ML14087A0782014-04-15015 April 2014
Staff Assessment of the Seismic Walkdown Report Supporting Implementation of Near-Term Task Force Recommendation 2.3 Related to Fukushima Dai-Ichi Nuclear Power Plant Accident (TAC MF0178 & MF0179)
NOC-AE-14003114, Seismic Hazard and Screening Report (CEUS Sites), Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai..2014-03-31031 March 2014
Seismic Hazard and Screening Report (CEUS Sites), Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai..
NOC-AE-14003082, Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 32014-03-11011 March 2014
Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 3
NOC-AE-13003067, Supplement to Seismic Walkdown Summary Report of Items Classified as Inaccessible2014-02-27027 February 2014
Supplement to Seismic Walkdown Summary Report of Items Classified as Inaccessible
ML14072A0802014-02-24024 February 2014
CHLE-006, STP Material Calculations, Revision 2
ML14072A0832014-02-24024 February 2014
CHLE-010, Chle Tank Test Results for Blended and NEI Fiber Beds with Aluminum Addition, Revision 3
ML14072A0862014-02-24024 February 2014
CHLE-015, Summary of Chemical Effects Testing in 2012 for STP GSI-191 License Submittal, Revision 4
ML14072A0872014-02-24024 February 2014
CHLE-016, Calculated Material Release to Estimate Chemical Effects, Revision 3
ML14072A0822014-02-23023 February 2014
CHLE-008, Debris Bed Preparation & Formation Test Results, Revision 4
ML14072A0852014-02-22022 February 2014
CHLE-014, T2 LBLOCA Test Report, Revision 3
ML14072A0882014-02-22022 February 2014
CHLE-018, Results of Bench Tests to Assess Corrosion of Aluminum in STP Containment Conditions, Revision 3
ML14072A0792014-02-22022 February 2014
CHLE-020, Test Results for 10-Day Chemical Effects Test Simulating LBLOCA Condition (T5), Revision 3
ML14072A0772014-02-18018 February 2014
CHLE-005, Determination of the Initial Pool Chemistry for the Chle Test, Revision 2
ML14072A0842014-02-18018 February 2014
CHLE-012, T1 Mbloca Test Report, Revision 4
ML14149A4352014-02-14014 February 2014
Project, Units 1 and 2 - ALION-REP-STP-8998-02, Rev. 0, STP Casa Grande Analysis and LAR Enclosure 4-3 RAI Response, Enclosure 1 to Attachment 1
ML14072A0812014-02-13013 February 2014
CHLE-007, Debris Bed Requirements & Preparation Procedures, Revision 4
ML13339A7362014-01-29029 January 2014
Interim Staff Evaluation and Audit Report Relating to Overall Integrated Plan in Response to Order EA-12-049 - Mitigation Strategies
ML13354B8332014-01-23023 January 2014
Mega-Tech Services, LLC Technical Evaluation Report Regarding the Overall Integrated Plan for South Texas Project, Units 1 and 2, TAC Nos.: MF0825 and MF0826
NOC-AE-13003070, Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application2013-12-23023 December 2013
Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application
ML13323A1862013-11-12012 November 2013
Enclosure 4-1 - Risk-Informed Closure of GSI-191, Volume 1
ML13323A1902013-11-0606 November 2013
Enclosure 4-3 Risk-Informed Closure of GSI-191, Volume 3, Engineering (Casa Grande) Analysis, Cover - Page 211 of 248
ML13323A1912013-11-0606 November 2013
Enclosure 4-3 Risk-Informed Closure of GSI-191, Volume 3, Engineering (Casa Grande) Analysis, Page 212 of 1-122
ML13323A1892013-10-22022 October 2013
Enclosure 4-2 - Risk-Informed Closure of GSI-191, Volume 2 Probabilistic Risk Analysis
ML13323B2092013-10-0404 October 2013
Attachment 12: CHLE-020, Rev. 2, Test Results for a 10-day Chemical Effects Test Simulating LBLOCA Conditions (T5).
ML13323B2082013-09-23023 September 2013
Attachment 11: CHLE-019, Rev. 2, Test Results for Chemical Effect Tests Stimulating Corrosion and Precipitation (T3 & T4)
ML13323B2072013-09-16016 September 2013
Attachment 10: CHLE-018, Rev. 2, Results of Bench Tests to Assess Corrosion of Aluminum in STP Containment Conditions.
NOC-AE-13003019, Submittal of Commitment Change Summary Report for the Period June 21, 2011 Through June 21, 20132013-07-18018 July 2013
Submittal of Commitment Change Summary Report for the Period June 21, 2011 Through June 21, 2013
ML13175A2122013-06-18018 June 2013
Project, Units 1 and 2, Enclosure 4-1 to NOC-AE-13002986, Risk-Informed Closure of GSI-191 Volume 1 Project Summary
NOC-AE-13002986, Enclosure 4-3 to NOC-AE-13002986, Risk-Informed Closure of GSI-191 Volume 3 Engineering Casa Grande Analysis, Page 161 of 260 Through End2013-06-0606 June 2013
Enclosure 4-3 to NOC-AE-13002986, Risk-Informed Closure of GSI-191 Volume 3 Engineering Casa Grande Analysis, Page 161 of 260 Through End
ML13175A2402013-06-0606 June 2013
Project, Units 1 and 2, Enclosure 4-3 to NOC-AE-13002986, Risk-Informed Closure of GSI-191 Volume 3 Engineering Casa Grande Analysis, Page 1 of 260 Through Page 160 of 260
2023-08-31
[Table view]
Category:Technical
MONTHYEARML23229A4992023-08-17017 August 2023
Supplement to Proposed Alternate Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection (Relief Request RR-ENG-4-06)
NOC-AE-21003841, Request for Relief from ASME Section Xl Code Requirements for Weld Examinations (Relief Request RR-ENG-3-25)2021-09-23023 September 2021
Request for Relief from ASME Section Xl Code Requirements for Weld Examinations (Relief Request RR-ENG-3-25)
ML21266A4262021-09-23023 September 2021
Request for Relief from ASME Section Xl Code Requirements for Weld Examinations (Relief Request RR-ENG-3-25)
ML16302A0152016-10-20020 October 2016
South Texas Project, Units 1 & 2 - Supplement 3 to Revised Pilot Submittal and Requests for Exemptions and License Amendment for a Risk-Informed Approach to Address Generic Safety Issue (GSl)-191 and Respond to Generic Letter (GL) 2004-02
NOC-AE-16003345, LTR-PAFM-16-11-NP, Revision 0, Technical Justification to Support Extended Volumetric Examination Interval for South Texas, Unit 2 Reactor Vessel Inlet Nozzle to Safe End Dissimilar Metal Welds.2016-03-31031 March 2016
LTR-PAFM-16-11-NP, Revision 0, Technical Justification to Support Extended Volumetric Examination Interval for South Texas, Unit 2 Reactor Vessel Inlet Nozzle to Safe End Dissimilar Metal Welds.
ML14260A4382014-08-31031 August 2014
Engineering Report ER-1059, Rev. 1, Bounding Uncertainty Analysis for Thermal Power Determination at South Texas Project Units 1 & 2 Using LEFM System.
NOC-AE-14003161, Engineering Report 1060, Rev. 1, Meter Factor Calculation & Accuracy Assessment for South Texas Project Units 1 & 2.2014-08-31031 August 2014
Engineering Report 1060, Rev. 1, Meter Factor Calculation & Accuracy Assessment for South Texas Project Units 1 & 2.
NOC-AE-14003082, Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 32014-03-11011 March 2014
Alternate Source Term Dose Analysis: an Estimate of Risk Attributed to GSI-191, Attachment 3
ML14072A0832014-02-24024 February 2014
CHLE-010, Chle Tank Test Results for Blended and NEI Fiber Beds with Aluminum Addition, Revision 3
ML14072A0802014-02-24024 February 2014
CHLE-006, STP Material Calculations, Revision 2
ML14072A0862014-02-24024 February 2014
CHLE-015, Summary of Chemical Effects Testing in 2012 for STP GSI-191 License Submittal, Revision 4
ML14072A0872014-02-24024 February 2014
CHLE-016, Calculated Material Release to Estimate Chemical Effects, Revision 3
ML14072A0822014-02-23023 February 2014
CHLE-008, Debris Bed Preparation & Formation Test Results, Revision 4
ML14072A0882014-02-22022 February 2014
CHLE-018, Results of Bench Tests to Assess Corrosion of Aluminum in STP Containment Conditions, Revision 3
ML14072A0792014-02-22022 February 2014
CHLE-020, Test Results for 10-Day Chemical Effects Test Simulating LBLOCA Condition (T5), Revision 3
ML14072A0852014-02-22022 February 2014
CHLE-014, T2 LBLOCA Test Report, Revision 3
ML14072A0842014-02-18018 February 2014
CHLE-012, T1 Mbloca Test Report, Revision 4
ML14072A0772014-02-18018 February 2014
CHLE-005, Determination of the Initial Pool Chemistry for the Chle Test, Revision 2
ML14149A4352014-02-14014 February 2014
Project, Units 1 and 2 - ALION-REP-STP-8998-02, Rev. 0, STP Casa Grande Analysis and LAR Enclosure 4-3 RAI Response, Enclosure 1 to Attachment 1
ML14072A0812014-02-13013 February 2014
CHLE-007, Debris Bed Requirements & Preparation Procedures, Revision 4
ML13339A7362014-01-29029 January 2014
Interim Staff Evaluation and Audit Report Relating to Overall Integrated Plan in Response to Order EA-12-049 - Mitigation Strategies
ML13354B8332014-01-23023 January 2014
Mega-Tech Services, LLC Technical Evaluation Report Regarding the Overall Integrated Plan for South Texas Project, Units 1 and 2, TAC Nos.: MF0825 and MF0826
NOC-AE-13003070, Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application2013-12-23023 December 2013
Response to NRC Request for Reference Document for STP Risk-Informed GSI-191 Application
ML13323B2092013-10-0404 October 2013
Attachment 12: CHLE-020, Rev. 2, Test Results for a 10-day Chemical Effects Test Simulating LBLOCA Conditions (T5).
ML13323B2082013-09-23023 September 2013
Attachment 11: CHLE-019, Rev. 2, Test Results for Chemical Effect Tests Stimulating Corrosion and Precipitation (T3 & T4)
ML13323B2072013-09-16016 September 2013
Attachment 10: CHLE-018, Rev. 2, Results of Bench Tests to Assess Corrosion of Aluminum in STP Containment Conditions.
ML13175A2122013-06-18018 June 2013
Project, Units 1 and 2, Enclosure 4-1 to NOC-AE-13002986, Risk-Informed Closure of GSI-191 Volume 1 Project Summary
ML13175A2402013-06-0606 June 2013
Project, Units 1 and 2, Enclosure 4-3 to NOC-AE-13002986, Risk-Informed Closure of GSI-191 Volume 3 Engineering Casa Grande Analysis, Page 1 of 260 Through Page 160 of 260
NOC-AE-13002986, Enclosure 4-3 to NOC-AE-13002986, Risk-Informed Closure of GSI-191 Volume 3 Engineering Casa Grande Analysis, Page 161 of 260 Through End2013-06-0606 June 2013
Enclosure 4-3 to NOC-AE-13002986, Risk-Informed Closure of GSI-191 Volume 3 Engineering Casa Grande Analysis, Page 161 of 260 Through End
NOC-AE-13002975, Enclosuflooding Hazard Reevaluation Report, Cover Through Page 2.2-462013-03-31031 March 2013
Enclosuflooding Hazard Reevaluation Report, Cover Through Page 2.2-46
ML13079A8082013-03-11011 March 2013
Enclosuflooding Hazard Reevaluation Report, Cover Through Page 2.3-1 Through End
ML13323B2042013-01-22022 January 2013
Attachment 9: CHLE-016, Rev. 2, Calculated Material Release to Estimate Chemical Effects.
ML13323B2012013-01-22022 January 2013
Attachment 7: CHLE-014, Rev. 2, T2 LBLOCA Test Report.
ML13323B2022013-01-15015 January 2013
Attachment 8: CHLE-015, Rev. 3, Summary of Chemical Effects Testing in 2012 for STP GSI-191 License Submittal.
ML13323B1992013-01-0909 January 2013
Attachment 6: CHLE-012, Rev. 3, T1 Mbloca Test Report, Cover Through Figure 52
ML13323B2002013-01-0909 January 2013
Attachment 6: CHLE-012, Rev. 3, T1 Mbloca Test Report, Figure 53 Through End
ML12335A1842012-11-26026 November 2012
Licensee Documents for December 12, 2012 Public Meeting
ML12335A1902012-11-26026 November 2012
Licensee Documents for December 12, 2012 Public Meeting
ML13025A1382012-10-31031 October 2012
STP GSI-191 Bypass Sensitivity Report - Water Conductivity Added
ML12243A4742012-08-30030 August 2012
Email - Risk-Informed Approach to GSI-191, STP Cfd Data Analysis Report - Bypass Test Protocol
ML13323B1982012-08-19019 August 2012
Attachment 5: CHLE-010, Rev. 2, Chle Tank Test Results for Blended and NEI Fiber Beds with Aluminum Addition.
ML13323B1912012-08-14014 August 2012
Attachment 2: CHLE-006, Rev. 1, STP Material Calculations.
NOC-AE-13003040, Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test.2012-08-13013 August 2012
Attachment 1: CHLE-005, Rev. 1, Determination of the Initial Pool Chemistry for the Chle Test.
ML13323B1942012-08-11011 August 2012
Attachment 3: CHLE-007, Rev. 3, Debris Bed Requirements and Preparation Procedures.
ML13323B1962012-06-12012 June 2012
Attachment 4: CHLE-008, Rev. 3, Debris Bed Preparation and Formation Test Results.
ML1206100682012-02-28028 February 2012
Southtexas Project, Units 1 and 2 - Test Plan for STP High Temperature Vertical Loops Testing
ML1205408162012-02-23023 February 2012
Experimental Setup for Chle Test Equipment
ML1205406672012-02-22022 February 2012
Casa Grande Summary
ML1205407272012-02-0909 February 2012
Actions Taken to Resolved Pirt Items
NOC-AE-12002784, Summary of the South Texas Project Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-1912012-01-11011 January 2012
Summary of the South Texas Project Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191
2023-08-17
[Table view] |
Text
Experimental Setup for Chemical Head Loss Experiment (CHLE) Test Equipment Kerry Howe February 09, 2012 During the Chemical Effects Summit held in the Nuclear Energy Institute offices on January 26 and 27, 2012, the Chemical Head Loss Experiment (CHLE) test equipment design was presented and discussed. This document describes the status of the design of this equipment and reflects input received from the NRC during the meeting and continued progress on the equipment design by the STP team. The test apparatus for the 30-day integrated tank tests has two main sections, as follows:
- 1. Material corrosion tank where materials present in containment can be placed to simulate the environment inside the containment structure during a LOCA.
- 2. Vertical head loss assemblies to simulate the flow conditions through a debris bed that forms on a sump screen.
A general schematic of the equipment is shown in Figure 1. The following sections describe detail on scaling parameters that will be used in the design and operation of the equipment and details of the equipment.
Figure 2 - Simplified Process Flow Diagram of the CHLE Test Equipment
- 1. CHLE Loop Design and Scaling to the STP System 2/9/2012 Teleconference: CHLE Test Equipment Page 1 of 6
Recirculation volume: The recirculation volume is the primary scaling parameter between the STP and CHLE systems. The nominal CHLE Loop volume is 250 gallons. The STP recirculation volume maximum is 668,000 gallons and minimum is 363,000 gallons. These values provide scaling parameters (STP:CHLE) of 2,670 (max) to 1,450 (min).
Sump strainer surface area: The CHLE loop has 3 parallel strainer assemblies each with a diameter of 6 inches, for a total strainer area of 0.59 ft2. The STP strainers have area of 1,815.5 ft2 per train. Using the scaling parameter for the maximum recirculation volume would require a total strainer area of 0.68 ft2. Scaling to the minimum recirculation would require a total screen area of 1.25 ft2. Thus, the CHLE system approximates the STP system at maximum pool volume with one strainer in operation. The flow in the CHLE system will pass through an area about 14 percent smaller than the area of one strainer in the STP system, which increases the mass loading per unit area over what would occur on the STP strainers. With 2 strainer trains operating at STP, the mass loading on the STP strainers will be less than half the mass loading on the CHLE system. By using a mass loading somewhat greater than the STP system, the CHLE system provides a conservative assessment of the effect of chemical precipitates on head loss.
Sump strainer loading rate: The minimum and maximum strainer flow rates are 1,620 gpm and 7,020 gpm, respectively. These rates correspond to filtration rates of 0.89 to 3.86 gpm/ft2 or approach velocities of 0.0020 to 0.0086 ft/s. The CHLE tests will be conducted at the maximum flowrate, thus, the flowrate to each CHLE strainer will be 0.76 gpm. The total to the 3 strainer assemblies will be 2.28 gpm.
Recirculation time: At the maximum pool volume in the STP system, the recirculation time is 95 minutes at maximum flow through one strainer and 410 minutes at minimum flow through one strainer. At the minimum pool volume in the STP system, the recirculation time is 52 minutes at maximum flow through one strainer and 224 minutes at minimum flow through one strainer. Recirculation times would be decreased accordingly if 2 strainer trains were operating.
At 250 gallons and a flow rate of 2.28 gpm, the recirculation time through the strainers in the CHLE loop would be 110 minutes. Thus, the recirculation times in the CHLE system are within the boundaries of the recirculation times in the STP containment.
Chemicals and materials: Chemicals and materials will be added to maintain the same (quantity)/(recirculation volume) ratios as the STP plant. Chemicals will be based on concentration (mass/volume). Metals, concrete, and coatings will be based on surface area/volume. Insulation debris will be based on volume/volume.
- 2. Material Corrosion Tank The material corrosion tank is shown in Figure 2. The physical attributes of this tank are as follows:
2/9/2012 Teleconference: CHLE Test Equipment Page 2 of 6
Figure 2 - Photograph of 30-Day Integrated Corrosion Head Loss Test Tank
- 1. The tank is nominally 4 ft x 4 ft x 6.6 ft in height, with vertical sides and a bottom that slopes to a centrally-located discharge port and 3 polycarbonate view windows.
- 2. The tank is divided into upper and lower sections. The lower section is designed to accommodate 250 gal. of solution and all materials that may be submerged in containment and contribute to chemical effects. The tank contains flow injection headers below the water line on the north and south walls, which are designed to provide turbulence in the tank pool and achieve a uniform flow pattern across the submerged coupons with velocities in the 0-3 cm/s range. The injection headers are 1-in.-diameter pipe with a symmetric pattern of holes to distribute the solution discharge. The necessary flow patterns are achieved when the recirculation pump operates at 25 gpm. Flow is controlled manually with a variable speed drive on the pump and a throttle valve.
- 3. The upper section is designed to accommodate all materials that may be in the vapor space in containment and contribute to chemical effects by being exposed to containment sprays.
Spray nozzles are located in the four corners near the top of the vapor space.
- 4. The tank is insulated and contains two titanium-jacketed rod-type heaters in the tank pool to maintain the temperature of the solution at a maximum of 185 °F with a range of +/- 5 °F. The heaters are fully redundant; either can provide the required heating capacity so that experiments can continue in the event of failure of a single heater.
- 5. A recirculation pump withdraws solution from the bottom discharge port, circulates it through the instrumentation pipe loop and supplies it the vertical head loss assemblies, and reintroduces it into the material corrosion tank through the upper spray nozzles or lower flow injection headers. Throttle valves and flow meters allow the flow to be apportioned to the 2/9/2012 Teleconference: CHLE Test Equipment Page 3 of 6
spray nozzles and flow injection headers at the proper rates. The instrumentation pipe loop contains a flow meter, pressure gage, temperature sensor, pH meter, and sample port. Flow, temperature, and pH are recorded continuously by a data acquisition system, temperature is reported locally.
- 6. The tank is constructed of type 304 stainless steel.
- 7. A removable cover and gantry crane allow for placing and removing samples.
- 3. Vertical head loss assemblies A schematic of the piping systems for the test equipment, including the vertical head loss assemblies, is shown in Figure 3. The physical attributes of the vertical head loss assemblies and piping systems are as follows:
- 1. The system will contain 3 identical vertical head loss assemblies, operated in parallel. Each consists of a 6-in diameter pipe assembly. The upper and lower portions of the pipe assembly are constructed of Sch 80 chlorinated polyvinyl chloride (CPVC) pipe. The middle section is constructed of 1/8-in thick polycarbonate to allow view of the debris bed. A schematic of the head loss assembly is shown in Figure 3.
- 2. The polycarbonate section will be 18-in long, with a support ring located 6-in from the bottom to support a perforated plate. This section allows a view of 6 inches below the debris bed and 12 inches above the debris bed. The top and bottom sections of the polycarbonate section will be flanged so that they can be removed from the piping system to allow the debris bed to be removed from the head loss assembly intact.
Figure 3 - Head Loss Assembly 2/9/2012 Teleconference: CHLE Test Equipment Page 4 of 6
- 3. Air vents will be located immediately below the support ring to allow gas to be vented from below the debris bed and at the top of the assembly.
- 4. The supply and discharge piping to each head loss assembly will be 1/2-in stainless steel (type 316) pipe, with either threaded or compression fittings.
- 5. The supply piping to each head loss assembly will have a tee to allow solution to be supplied from the material corrosion tank or from the bed formation recirculation loop (described below, see item 8). Each leg will have a ball valve for isolation.
- 6. The supply piping to each head loss assembly coming from the material corrosion tank will have an insertion-style magnetic flow meter.
- 7. The discharge piping from each head loss assembly will have a tee to allow solution to be returned to the material corrosion tank or to the bed formation recirculation loop. The leg to the material corrosion tank will have a globe valve for flow control and the leg to the bed formation recirculation loop will have a ball valve for isolation. The globe valve will also provide backpressure to prevent or minimize degassing below the debris bed due to negative pressure in the head loss assembly.
- 8. A separate debris bed formation recirculation loop is configured to be part of the piping system. The bed formation recirculation loop will have a pump, ball valve for throttling, and rotometer. All piping in the bed formation recirculation loop will be 3/4-in SS pipe. The bed formation recirculation loop will have a supply header and a return header so that it can provide solution to each of the three head loss assemblies independently of the others. Each head loss assemblies will have ball valves in the supply and return lines for isolation. The debris bed formation recirculation loop will have connections for filling and draining the line, equipped with ball valves and hose bibb connections.
- 9. The piping system will have a separate loop to do thermal cycling. This loop will have a cooling system to reduce the temperature. Following the heat exchanger will be a reservoir to provide holding time at the lower temperature. The cooled fluid will flow through a system to detect precipitates (possibly a laboratory filter with a DP cell across it). On the discharge side of the precipitation detector will be a heating system to return the fluid to the temperature of the tank.
A process flow diagram for the overall system is shown in Figure 4.
2/9/2012 Teleconference: CHLE Test Equipment Page 5 of 6
Figure 4 - Process Flow Diagram of 30-Day Integrated CHLE Test System 2/9/2012 Teleconference: CHLE Test Equipment Page 6 of 6
