ML14339A613
| ML14339A613 | |
| Person / Time | |
|---|---|
| Site: | Kewaunee  |
| Issue date: | 11/24/2014 |
| From: | Dominion Energy Kewaunee |
| To: | Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML14339A626 | List: |
| References | |
| 14-572 | |
| Download: ML14339A613 (56) | |
Text
Revision 2511/26/14 KPS USAR 6-i 6.1 DELETED......................................................
6.1-2 6.1.1 Deleted..................................................
6.1-2 6.1.1.1 Deleted......................................
6.1-2 6.1.1.2 Deleted......................................
6.1-2 6.1.1.3 Deleted......................................
6.1-2 6.1.1.4 Deleted......................................
6.1-2 6.1.1.5 Deleted......................................
6.1-2 6.1.1.6 Deleted......................................
6.1-2 6.1.1.7 Deleted......................................
6.1-2 6.1.2 Deleted..................................................
6.1-2 6.1 References[Deleted]............................................... 6.1-2 6.2 SAFETY INJECTION SYSTEM.....................................
6.2-1 6.2.1 Design Basis.............................................
6.2-1 6.2.1.1 Deleted......................................
6.2-1 6.2.1.2 Deleted......................................
6.2-1 6.2.1.3 Deleted......................................
6.2-1 6.2.1.4 Deleted......................................
6.2-1 6.2.1.5 Deleted......................................
6.2-1 6.2.1.6 Codes and Classifications.......................
6.2-1 6.2.1.7 Deleted......................................
6.2-1 6.2.2 System Design and Operation................................
6.2-1 6.2.2.1 Deleted......................................
6.2-1 6.2.2.2 Components..................................
6.2-1 6.2.2.3 Deleted......................................
6.2-5 6.2.3 Deleted..................................................
6.2-5 6.2.3.1 Deleted......................................
6.2-5 6.2.3.2 Deleted......................................
6.2-5 6.2.3.3 Deleted......................................
6.2-5 6.2.3.4 Deleted......................................
6.2-5 6.2.3.5 Deleted......................................
6.2-5 6.2.3.6 Deleted......................................
6.2-5 6.2.3.7 Deleted......................................
6.2-5 6.2.3.8 Deleted......................................
6.2-5 6.2.3.9 Deleted......................................
6.2-5 Chapter 6: Engineered Safety Features Table of Contents Section Title Page
Chapter 6: Engineered Safety Features Table of Contents (continued)
Section Title Page Revision 2511/26/14 KPS USAR 6-ii 6.2.3.10 Deleted......................................
6.2-5 6.2.4 Deleted..................................................
6.2-5 6.2.4.1 Deleted......................................
6.2-5 6.2.4.2 Deleted......................................
6.2-5 6.2.4.3 Deleted......................................
6.2-5 6.2.4.4 Deleted......................................
6.2-5 6.2.5 Deleted..................................................
6.2-5 6.2 References[Deleted]............................................... 6.2-5 6.3 CONTAINMENT AIR COOLING SYSTEM...........................
6.3-1 6.3.1 Design Basis.............................................
6.3-1 6.3.1.1 Containment Heat Removal Systems...............
6.3-1 6.3.1.2 Deleted......................................
6.3-1 6.3.1.3 Deleted......................................
6.3-1 6.3.1.4 Deleted......................................
6.3-1 6.3.1.5 Deleted......................................
6.3-1 6.3.2 System Design and Operation................................
6.3-1 6.3.2.1 Containment Air Cooling System Characteristics.....
6.3-1 6.3.2.2 Actuation Provisions...........................
6.3-2 6.3.2.3 Flow Distribution and Flow Characteristics.........
6.3-2 6.3.2.4 Cooling Water for the Fan-Coil Unit...............
6.3-3 6.3.2.5 Deleted......................................
6.3-3 6.3.2.6 Component...................................
6.3-3 6.3.3 Design Evaluation.........................................
6.3-5 6.3.3.1 Range of Containment Protection.................
6.3-5 6.3.3.2 Deleted......................................
6.3-5 6.3.3.3 Single Failure Analysis.........................
6.3-5 6.3.3.4 Reliance on Interconnected Systems...............
6.3-5 6.3.3.5 Deleted......................................
6.3-6 6.3.3.6 Deleted......................................
6.3-6 6.3.4 Tests and Inspection.......................................
6.3-6 6.3.4.1 Inspection Capability...........................
6.3-6 6.3.4.2 Testing......................................
6.3-6 6.3 References...................................................... 6.3-6
Chapter 6: Engineered Safety Features Table of Contents (continued)
Section Title Page Revision 2511/26/14 KPS USAR 6-iii 6.4 Deleted.........................................................
6.4-1 6.4.1 Deleted..................................................
6.4-1 6.4.1.1 Deleted......................................
6.4-1 6.4.1.2 Deleted......................................
6.4-1 6.4.1.3 Deleted......................................
6.4-1 6.4.1.4 Deleted......................................
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6.4-1 6.4.1.6 Deleted......................................
6.4-1 6.4.1.7 Deleted......................................
6.4-1 6.4.2 Deleted..................................................
6.4-1 6.4.2.1 Deleted......................................
6.4-1 6.4.2.2 Deleted......................................
6.4-1 6.4.2.3 Deleted......................................
6.4-1 6.4.2.4 Deleted......................................
6.4-1 6.4.3 Deleted..................................................
6.4-1 6.4.3.1 Deleted......................................
6.4-1 6.4.3.2 Deleted......................................
6.4-1 6.4.3.3 Deleted......................................
6.4-1 6.4.3.4 Deleted......................................
6.4-1 6.4.3.5 Deleted......................................
6.4-2 6.4.3.6 Deleted......................................
6.4-2 6.4.4 Deleted..................................................
6.4-2 6.4.4.1 Deleted......................................
6.4-2 6.4.4.2 Deleted......................................
6.4-2 6.4.4.3 Deleted......................................
6.4-2 6.4.4.4 Deleted......................................
6.4-2 6.4 References[Deleted]............................................... 6.4-2 6.5 LEAKAGE DETECTION AND PROVISIONS FOR THE PRIMARY AND AUXILIARY COOLANT LOOPS..............................
6.5-1 6.5.1 Leakage Detection Systems..................................
6.5-1 6.5.1.1 Deleted......................................
6.5-1 6.5.1.2 Systems Design and Operation...................
6.5-1 6.5.2 Deleted..................................................
6.5-3 6.5.2.1 Deleted......................................
6.5-3
Chapter 6: Engineered Safety Features Table of Contents (continued)
Section Title Page Revision 2511/26/14 KPS USAR 6-iv 6.5.2.2 Deleted......................................
6.5-3 6.5.2.3 Deleted......................................
6.5-3 6.5.2.4 Deleted......................................
6.5-3 6.5.3 Deleted..................................................
6.5-3 6.5 References[Deleted]............................................... 6.5-3 6.6 DELETED......................................................
6.6-1 6.6.1 Deleted..................................................
6.6-1 6.6.1.1 Deleted......................................
6.6-1 6.6.2 Deleted..................................................
6.6-1 6.6.3 Deleted..................................................
6.6-1 6.6.4 Deleted..................................................
6.6-1 6.6.4.1 Deleted......................................
6.6-1 6.6.5 Deleted..................................................
6.6-1 6.6.6 Deleted..................................................
6.6-1 6.6 References[Deleted]............................................... 6.6-1
Revision 2511/26/14 KPS USAR 6-v Chapter 6: Engineered Safety Features List of Tables Table Title Page 6.2-1 Code Requirements...........................................
6.2-7 6.2-2 Deleted....................................................
6.2-8 6.2-3 Deleted....................................................
6.2-9 6.2-4 Deleted....................................................
6.2-10 6.2-5 Refueling Water Storage Tank Design Parameters..................
6.2-11 6.2-6 Deleted....................................................
6.2-12 6.2-7 Residual Heat Exchangers Design Parameters......................
6.2-13 6.2-8 Deleted....................................................
6.2-14 6.2-9 Deleted....................................................
6.2-15 6.2-10 Deleted....................................................
6.2-16 6.2-11 Deleted....................................................
6.2-17 6.2-12 Residual Heat Removal System Design, Operation, and Test Conditions.
6.2-18 6.2-13 Deleted....................................................
6.2-19 6.3-1 Deleted....................................................
6.3-7 6.3-2 Deleted....................................................
6.3-7 6.3-3 Deleted....................................................
6.3-8 6.4-1 Deleted....................................................
6.4-3 6.4-2 Deleted....................................................
6.4-3 6.4-3 Deleted....................................................
6.4-4 6.4-4 Deleted....................................................
6.4-5
Revision 2511/26/14 KPS USAR 6-vi Chapter 6: Engineered Safety Features List of Figures Figure Title Page 6.2-1 Deleted.................................................... 6.2-20 6.2-2 Deleted.................................................... 6.2-21 6.2-3 Deleted.................................................... 6.2-22 6.2-4 Deleted.................................................... 6.2-23 6.2-5 Deleted.................................................... 6.2-24 6.3-1 Fan Coil Unit Sketch..........................................
6.3-9 6.4-1 Deleted....................................................
6.4-6 6.4-2 Deleted....................................................
6.4-7
Revision 2511/26/14 KPS USAR 6.1-1 Volume II CHAPTER 6 ENGINEERED SAFETY FEATURES
- 1. Deleted
- 2. Deleted
- 3. Deleted
- 4. Deleted In the original design, the Engineered Safety Features in this plant were the Containment System, the Safety Injection System, the Containment Cooling System, the Containment Spray System, the Auxiliary Feedwater System, Special Zone Ventilation Systems, and the Diesel Generators and Station Batteries.
Since KPS has permanently ceased operation, these systems, structures, or components (SSC) have been abandoned or re-purposed such that they no longer perform any design basis functions. Engineered Safety Features, as such, are no longer a required part of the facility design.
USAR Sections 6.1 through 6.2.1.5 have been deleted as they no longer pertain to the station design.
Revision 2511/26/14 KPS USAR 6.1-2 6.1 DELETED 6.1.1 Deleted 6.1.1.1 Deleted 6.1.1.2 Deleted 6.1.1.3 Deleted 6.1.1.4 Deleted 6.1.1.5 Deleted 6.1.1.6 Deleted 6.1.1.7 Deleted 6.1.2 Deleted 6.1 References[Deleted]
- 1. Deleted
- 2. Deleted
- 3. Deleted
- 4. Deleted
Revision 2511/26/14 KPS USAR 6.2-1 6.2 SAFETY INJECTION SYSTEM 6.2.1 Design Basis 6.2.1.1 Deleted 6.2.1.2 Deleted 6.2.1.3 Deleted 6.2.1.4 Deleted 6.2.1.5 Deleted 6.2.1.6 Codes and Classifications Table 6.2-1 tabulates the codes and standards to which components in service at the station that formerly provided functions within, or in support of, the safety injection system are designed.
6.2.1.7 Deleted 6.2.2 System Design and Operation 6.2.2.1 Deleted 6.2.2.1.1 Deleted 6.2.2.1.2 Deleted 6.2.2.1.3 Deleted 6.2.2.1.4 Deleted 6.2.2.1.5 Deleted 6.2.2.2 Components 6.2.2.2.1 Deleted 6.2.2.2.2 Refueling Water Storage Tank The capacity of the refueling water storage tank was originally based on the requirement for filling the reactor-refueling cavity with not less than 272,500 gallons.
- 1. Deleted
- 2. Deleted
- 3. Deleted
Revision 2511/26/14 KPS USAR 6.2-2 The design parameters are given in Table 6.2-5.
6.2.2.2.3 Deleted 6.2.2.2.4 Heat Exchanger The residual heat exchanger of the Auxiliary Coolant System was originally sized for the normal cooldown of the RCS. Table 6.2-7 gives the design parameters of the heat exchanger.
The residual heat exchanger is a conventional vertical shell and U-tube type unit. The tubes are seal welded to the tube sheet. The shell connections are flanged to facilitate shell removal for inspection and cleaning of the tube bundle. The unit has a SA-285 Grade C carbon steel shell, a SA-234 carbon steel shell end cap, SA-213 TP-304 stainless steel tubes, SA-240 Type 304 stainless steel channel head, SA-240 Type 304 stainless steel channel head cover and SA-240 Type 304 stainless steel tube sheet.
The ASME Boiler and Pressure Vessel Code has strict rules regarding the wall thickness of all pressure containing parts, material quality assurance provisions, weld joint design, radiographic and liquid penetrant examination of materials and joints, and hydrostatic testing of the unit, as well as requiring final inspection and stamping of the vessel by an ASME Code inspector.
The design of the heat exchanger also conforms to the requirements of TEMA (Tubular Exchanger Manufacturers Association) for Class R heat exchangers. Class R is the most rugged class of TEMA heat exchangers and is intended for units where safety and durability are required under severe service conditions. Items such as: tube spacing, flange design, nozzle location, baffle thickness and spacing, and impingement plate requirements are set forth by TEMA Standards.
In addition to the above, additional design and inspection requirements were imposed to ensure a rugged, high-quality heat exchanger such as: confined-type gaskets, main flange studs with two nuts on each end to ensure permanent leak tightness, general construction and mounting brackets suitable for the plants original seismic design requirements, tubes and tube sheet capable of withstanding full shell side pressure and temperature with atmospheric pressure on the tube side, ultrasonic inspection in accordance with Paragraph N-324.3 of Section III of the ASME Code of all tubes before bending, penetrant inspection in accordance with Paragraph N-627 of Section III of the ASME Code of all welds and all hot or cold formed parts, a hydrostatic test duration of not less than thirty minutes, the witnessing of hydro and penetrant tests by a qualified inspector, a thorough final inspection of the unit for good workmanship and the absence of any gouge marks or other scars that could act as stress concentration points, and a review of the radiographs and of the certified chemical and physical test reports for all materials used in the unit.
Revision 2511/26/14 KPS USAR 6.2-3 6.2.2.2.5 Valves All parts of the valves originally designed for use in the SI System in contact with borated water are austenitic stainless steel or equivalent corrosion resistant material.
Valving was specified for exceptional tightness and, where possible, such as instrument valves, packless diaphragm valves were used. All valves, except those, which perform a control function, were originally designed with backseats, which were capable of limiting leakage to less than 1.0 cc per hour per inch of stem diameter, assuming no credit taken for valve packing.
6.2.2.2.6 Deleted 6.2.2.2.7 Manual Valves The stainless steel manual globe, gate and check valves installed as part of the original plant construction were designed and built in accordance with the following requirements. The pressure containing parts (body, bonnet and discs) of the valves were designed, in the earlier editions of ASME III, per criteria established by the USAS B16.5 or MSS SP66 specifications. The current ASME III refers to a large extent to ANSI B16.34 for valve requirements. The materials of construction for these parts are procured per ASTM A182, F316 or A351, GR CF8M, or CF8. All material in contact with the primary fluid, except the packing, is austenitic stainless steel or equivalent corrosion-resisting material.
The carbon steel valves are built to conform with USAS B16.5. The materials of construction of the body, bonnet and disc conform to the requirements of ASTM A105 Grade II, A181 Grade II or A216 Grade WCB or WCC. The carbon steel valves pass only non-radioactive fluids and are subjected to hydrostatic test as outlined in MSS SP-61 except that the test pressure is maintained for at least 30 minutes. Since the fluid controlled by the carbon steel valves is not radioactive, the double packing and seal weld provisions are not provided.
6.2.2.2.8 Deleted 6.2.2.2.9 Deleted 6.2.2.2.10 Deleted 6.2.2.2.11 Piping All SI System piping in contact with borated water is austenitic stainless steel. Piping joints are welded.
The piping was designed to meet the minimum requirements set forth in (1) the USAS B31.1 Code for the Pressure Piping (1967), (2) USAS Standards B36.10 and B36.19,
Revision 2511/26/14 KPS USAR 6.2-4 (3) ASTM Standards, and (4) supplementary standards plus additional quality control measures such as the non-destructive testing requirements of Nuclear Code Case N-7.
Minimum wall thicknesses are determined by the USAS Code formula in the power piping Section 1 of the USAS Code for Pressure Piping. This minimum thickness is increased in accordance with plant engineering specifications to account for manufacturing tolerances and bend allowances. Purchased pipe and fittings have a specified nominal wall thickness that is no less than the sum of that required for pressure containment, mechanical strength, and manufacturing tolerance.
Pipe and fitting materials were procured in conformance with all requirements of the ASTM and USAS specifications. All materials were verified for conformance to specification and documented by certification of compliance to ASTM material requirements. Specifications impose additional quality control upon the suppliers of pipes and fittings as listed below.
- 1. Deleted
- 2. Deleted
Revision 2511/26/14 KPS USAR 6.2-5 6.2.2.2.12 Deleted 6.2.2.2.13 Deleted 6.2.2.2.14 Deleted 6.2.2.2.15 Deleted 6.2.2.3 Deleted 6.2.3 Deleted 6.2.3.1 Deleted 6.2.3.2 Deleted 6.2.3.3 Deleted 6.2.3.4 Deleted 6.2.3.5 Deleted 6.2.3.6 Deleted 6.2.3.7 Deleted 6.2.3.8 Deleted 6.2.3.9 Deleted 6.2.3.9.1 Deleted 6.2.3.10 Deleted 6.2.4 Deleted 6.2.4.1 Deleted 6.2.4.2 Deleted 6.2.4.3 Deleted 6.2.4.4 Deleted 6.2.5 Deleted 6.2 References[Deleted]
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- 2. Deleted
- 3. Deleted
- 4. Deleted
- 5. Deleted
Revision 2511/26/14 KPS USAR 6.2-6
- 6. Deleted
- 7. Deleted
- 8. Deleted
- 9. Deleted
- 10. Deleted
- 11. Deleted
Revision 2511/26/14 KPS USAR 6.2-7 Table 6.2-1 CODE REQUIREMENTS Component Code Refueling Water Storage Tank API 650 Residual Heat Exchanger:
Tube Side Shell Side ASME Section III Class C ASME Section VIII Valves USAS B16.5 Piping USAS B31.1
Revision 2511/26/14 KPS USAR 6.2-8 Table 6.2-2 DELETED
Revision 2511/26/14 KPS USAR 6.2-9 Table 6.2-3 DELETED
Revision 2511/26/14 KPS USAR 6.2-10 Table 6.2-4 DELETED
Revision 2511/26/14 KPS USAR 6.2-11 Table 6.2-5 REFUELING WATER STORAGE TANK DESIGN PARAMETERS Number 1
Material Stainless steel Total volume, gal (max.)
276,500 Minimum required volume, gal 272,500 Normal pressure, psig Atmospheric Minimum operating temperature, °F 40 Design pressure, psig Atmospheric Design temperature, °F 200
- a. Deleted
- b. Deleted
Revision 2511/26/14 KPS USAR 6.2-12 Table 6.2-6 DELETED
Revision 2511/26/14 KPS USAR 6.2-13 Table 6.2-7 RESIDUAL HEAT EXCHANGERS DESIGN PARAMETERS Number 2
Design heat duty, Btu/hr (normal) 26.0E+6 Design UA, Btu/hr/°F 0.67E+6 Type Vertical shell and U-tube Tube Side Shell Side Design Pressure, psig 600 150 Design Temperature, °F 400 350 Design flow, lb/hr 1.0E+6 1.25E+6 Inlet temperature, °F 160 95 Outlet temperature, °F 133.5 116.1
Revision 2511/26/14 KPS USAR 6.2-14 Table 6.2-8 DELETED
Revision 2511/26/14 KPS USAR 6.2-15 Table 6.2-9 DELETED
Revision 2511/26/14 KPS USAR 6.2-16 Table 6.2-10 DELETED
Revision 2511/26/14 KPS USAR 6.2-17 Table 6.2-11 DELETED
Revision 2511/26/14 KPS USAR 6.2-18 Table 6.2-12 RESIDUAL HEAT REMOVAL SYSTEM DESIGN, OPERATION, AND TEST CONDITIONS Heat Exchangers Valves Pipes and Fittings Design Conditions of System Pressure, psig Temperature, °F 600 400 600 400 600 400
- a. Deleted
Revision 2511/26/14 KPS USAR 6.2-19 Table 6.2-13 DELETED
Revision 2511/26/14 KPS USAR 6.2-20 Figure 6.2-1 DELETED
Revision 2511/26/14 KPS USAR 6.2-21 Figure 6.2-2 DELETED
Revision 2511/26/14 KPS USAR 6.2-22 Figure 6.2-3 DELETED
Revision 2511/26/14 KPS USAR 6.2-23 Figure 6.2-4 DELETED
Revision 2511/26/14 KPS USAR 6.2-24 Figure 6.2-5 DELETED
Revision 2511/26/14 KPS USAR 6.3-1 6.3 CONTAINMENT AIR COOLING SYSTEM 6.3.1 Design Basis 6.3.1.1 Containment Heat Removal Systems Adequate heat removal capability for the containment is provided by the Containment Air Cooling System whose components operate as described in Section 6.3.2.
The Containment Air Cooling System was originally designed to cool the containment atmosphere in the event of a design basis loss-of-coolant or main steam line break accident.
KPS has permanently ceased operation. Therefore, the Containment Air Cooling System is now operated, as needed, to maintain the containment environment suitable for personnel access and the long term SAFSTOR of the station. Containment Air Cooling no longer has a containment pressure limiting/reducing function.
6.3.1.2 Deleted 6.3.1.3 Deleted 6.3.1.4 Deleted 6.3.1.5 Deleted 6.3.2 System Design and Operation A schematic arrangement of the Containment Air Cooling System is shown in Figure 5.4-1.
Individual system components and their supports meet the requirement for Class I*
(seismic) structures.
6.3.2.1 Containment Air Cooling System Characteristics The Containment Air Cooling System consists of a fan-coil unit, a duct distribution system, four emergency discharge dampers and the associated instrumentation and controls.
The fan-coil unit is located in a missile-protected area outside of the primary compartments.
The fan-coil unit consists of helical-fin cooling coil, housing, fan and motor.
The vane-axial fan is driven by a single-speed motor originally designed to be capable of delivering the horsepower required to move the required quantity of air-steam mixture under
Revision 2511/26/14 KPS USAR 6.3-2 post-accident conditions. The unit was designed for the high pressure, temperature, and humidity conditions following a loss-of-coolant accident.
Ducts distribute the cooled air to the various containment compartments and areas. The normal sequence through the fan coil unit is as follows: cooling coil, vane-axial fan, distribution duct header and emergency discharge dampers.
The heat sink for the fan coil unit is provided by the Service Water System.
In removing heat at the design rate, the fan coil ducting and emergency discharge dampers are capable of discharging the resulting condensate without impairing the flow capacity of the unit.
6.3.2.2 Actuation Provisions The fan coil unit has a flow rate capacity of 44,000 cfm under normal conditions.
Overload protection for the fan motor is provided by an overcurrent trip device. The breaker for the fan motor can be operated manually from the control room.
The motor of the fan coil unit is rated 125 hp. Short circuit and overload protection is provided in the feeder breaker for the motor.
Resistance Temperature Detectors (RTDs) are located in the ductwork, including one downstream of the Containment Fan Coil Unit. Temperature indicators and temperature alarms are provided in the control room.
6.3.2.3 Flow Distribution and Flow Characteristics The duct distribution system is designed to promote good mixing of the containment air and ensures that the recirculated cooled air will reach all areas. The distribution system is represented schematically in Figure 5.4-1.
The system includes a ring header and branch ducts to the primary compartments for distribution of cooled air from the fan-coil discharge. The cooled air is circulated upward from the lower primary compartments, through the steam generator compartments to the operating floor level.
The fan-coil unit has an emergency discharge damper (permanently failed open) installed in its discharge duct at the operating floor level. The damper is opened to ensure cooled airflow and mixing of the containment air. The ring header also discharges air to the containment area above the operating floor level. Air that has risen to the top of the containment dome is drawn down toward the suction of the fan-coil units by the Containment Dome Ventilation System fans.
The Containment Dome Ventilation fan draws air from the highest point in the center of
Revision 2511/26/14 KPS USAR 6.3-3 containment through 2 of 4 inlet ducts that follow the contour of the dome (on opposite sides of the dome) downward to the operating floor inside containment, where the air is then discharged.
The temperature of the air returning to the fan-coil unit will be essentially the ambient existing in the Reactor Containment Vessel.
6.3.2.4 Cooling Water for the Fan-Coil Unit The cooling water requirements for the four-fan coil unit is supplied by the service water pumps. The Service Water System is described in Chapter 9.
The fan-coil unit is supplied by the service water header outside the containment as shown in Figure 9.6-4. The piping to and from the fan-coil unit contains adequate valving to allow the fan-coil unit to be isolated for maintenance.
The cooling water discharge from the fan-coil unit is monitored for radioactivity by routing a small bypass flow through a radiation monitor. Upon indication of radioactivity in the effluent, the fan-coil unit discharge line is monitored and isolated as necessary.
Flow indication is provided outside containment for service water to the fan coil unit. A failure in a service water header will be detected by containment sump level instrumentation. The magnitude of the leak is estimated using the containment sump level change with time. Leaks of greater magnitude can be detected by sequentially isolating each header discharge and comparing the flow rate through each header. Leaks of smaller magnitude are detected by isolating each header sequentially and trending Containment level versus time.
The fan-coil unit and the Service Water supply are operated as necessary to control containment temperature.
6.3.2.5 Deleted 6.3.2.6 Component 6.3.2.6.1 Fan-Motor Unit The Containment Air Cooling System fan is of the vane-axial, non-overloading, direct drive type.
The fan is driven by a totally enclosed 125-horsepower, induction type, 3-phase, 60-Hertz, 460-V, 1200 rpm, Reliance Electric Motor. Significant motor details are as follows:
- 1. Insulation
Revision 2511/26/14 KPS USAR 6.3-4 Class N insulation operating at NEMA Class B temperature rise. Ground insulation is Nomex and Kapton. Wedges are of a silicone glass laminate and separators are of a Kapton or silicone glass laminate. Power supply leads are insulated with materials suitable for the pre-decommissioning design basis accident conditions.
- 2. Bearings The motor has anti-friction ball bearings for both the thrust and radial bearings. Bearings are lubricated with a special high temperature, radiation-resistant grease.
- 3. Conduit (Connection) Box The motor leads are brought out of the frame through a seal and into an oversized conduit box. The seal material is suitable for both the temperature and radiation conditions experienced following the pre-decommissioning design basis loss-of-coolant accident.
6.3.2.6.2 Cooling Coils The cooling coil contained within the Containment Fan Coil Unit was replaced in 1992. The coil was not N stamped which allowed installation and maintenance consistent with current practice.
The Containment Fan Coil Unit's replacement coil was procured so that the thermal performance was equivalent or better than the existing CFCU coil. The replacement coil utilizes a helical fin construction and is slightly more efficient in terms of heat removing capability than the original coil.
The replacement coil was required to be the same weight or less to maintain the current seismic documentation for the CFC Unit.
Two key improvements were instituted in the design of the coil to delay the effects of erosion; the tube wall thickness was increased at the return bends from 0.049" to 0.085" (average) and the tube material was changed to a harder 70-30 Ni-Cu material.
In addition the coil was fabricated under the requirements of ASME Division I Class 3 which is an enhancement over the original fabrication.
The heat removal capability of the replacement fan coil is 54.8E+6 Btu/hr when entering steam air mixture is at 270°F. Air and water flow paths are arranged for counter flow.
The coil is provided with drain pan and drain piping to prevent flooding. This condensate is drained to the containment sump.
Revision 2511/26/14 KPS USAR 6.3-5 6.3.2.6.3 Deleted 6.3.2.6.4 Fan-Coil Emergency Discharge Dampers The dampers are parallel blade, pneumatically operated (air open, spring close) type.
Isolation dampers are provided to prevent back flow through an inactive unit.
All ductwork, damper blades, and seating surfaces are constructed of, or coated with corrosion-resistant materials.
6.3.2.6.5 Electrical Supply Details of the power sources are presented in Chapter 8.
Further information on the components of the Containment Air Cooling System is given in Chapter 5.
6.3.3 Design Evaluation 6.3.3.1 Range of Containment Protection KPS has permanently ceased operation. Therefore, the Containment Air Cooling System is now operated, as needed, to maintain the containment environment suitable for personnel access and the long term SAFSTOR of the station. Although originally designed for accident mitigation, the Containment Air Cooling no longer has a containment pressure limiting/reducing function.
6.3.3.2 Deleted 6.3.3.3 Single Failure Analysis Following permanent cessation of operation single failure criteria no longer apply.
6.3.3.4 Reliance on Interconnected Systems The Containment Air Cooling System is dependent on the operation of the electrical and Service Water Systems.
Revision 2511/26/14 KPS USAR 6.3-6 6.3.3.5 Deleted 6.3.3.6 Deleted 6.3.4 Tests and Inspection 6.3.4.1 Inspection Capability Access is available for visual inspection of the Containment Air Cooling System components including fans, cooling coils, dampers and ductwork.
6.3.4.2 Testing 6.3.4.2.1 Component Testing The Containment Air Cooling System fans were statically and dynamically balanced by the manufacturer as well as shop tested for conformance with the AMCA (Air Moving and Conditioning Association) ratings performance criteria using air at standard conditions.
The fan motors are designed to operate in continuous normal service.
6.3.4.2.2 System Testing The fan coil unit, if not in use can be started from the control room to verify readiness.
6.3.4.2.3 Deleted 6.3 References
- 1. American Air Filter Co., Inc. Design Report of the Containment Fan Coil Units for the Kewaunee Nuclear Power Plant, PEP 253, August 31, 1970 (submitted as Amendment No. 11 to this license application).
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Revision 2511/26/14 KPS USAR 6.3-7 Table 6.3-1 DELETED Table 6.3-2 DELETED
Revision 2511/26/14 KPS USAR 6.3-8 Table 6.3-3 DELETED
Revision 2511/26/14 KPS USAR 6.3-9 Figure 6.3-1 FAN COIL UNIT SKETCH
Revision 2511/26/14 KPS USAR 6.3-10 Intentionally Blank
Revision 2511/26/14 KPS USAR 6.4-1 6.4 DELETED 6.4.1 Deleted 6.4.1.1 Deleted 6.4.1.2 Deleted 6.4.1.3 Deleted 6.4.1.4 Deleted 6.4.1.5 Deleted 6.4.1.6 Deleted 6.4.1.7 Deleted 6.4.2 Deleted 6.4.2.1 Deleted 6.4.2.1.1 Deleted 6.4.2.1.2 Deleted 6.4.2.2 Deleted 6.4.2.2.1 Deleted 6.4.2.2.2 Deleted 6.4.2.2.3 Deleted 6.4.2.2.4 Deleted 6.4.2.2.5 Deleted 6.4.2.2.6 Deleted 6.4.2.2.7 Deleted 6.4.2.3 Deleted 6.4.2.4 Deleted 6.4.3 Deleted 6.4.3.1 Deleted 6.4.3.2 Deleted 6.4.3.3 Deleted 6.4.3.4 Deleted
Revision 2511/26/14 KPS USAR 6.4-2 6.4.3.5 Deleted 6.4.3.6 Deleted 6.4.4 Deleted 6.4.4.1 Deleted 6.4.4.2 Deleted 6.4.4.3 Deleted 6.4.4.4 Deleted 6.4 References[Deleted]
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Revision 2511/26/14 KPS USAR 6.4-3 Table 6.4-1 DELETED Table 6.4-2 DELETED
Revision 2511/26/14 KPS USAR 6.4-4 Table 6.4-3 DELETED
Revision 2511/26/14 KPS USAR 6.4-5 Table 6.4-4 DELETED
Revision 2511/26/14 KPS USAR 6.4-6 Figure 6.4-1 DELETED
Revision 2511/26/14 KPS USAR 6.4-7 Figure 6.4-2 DELETED
Revision 2511/26/14 KPS USAR 6.4-8 Intentionally Blank
Revision 2511/26/14 KPS USAR 6.5-1 6.5 LEAKAGE DETECTION AND PROVISIONS FOR THE PRIMARY AND AUXILIARY COOLANT LOOPS 6.5.1 Leakage Detection Systems Some features formerly credited with detecting leakage from the RCS or auxiliary systems, although no longer performing that function, remain in service for general housekeeping considerations. Their descriptions follow. Radiation monitoring capabilities that remain part of the station design are described in Chapter 11.
6.5.1.1 Deleted 6.5.1.1.1 Deleted 6.5.1.1.2 Deleted 6.5.1.1.3 Deleted 6.5.1.2 Systems Design and Operation 6.5.1.2.1 Deleted 6.5.1.2.2 Deleted 6.5.1.2.3 Deleted 6.5.1.2.4 Humidity Detector The humidity detection instrumentation offers a means of detection of leakage into the containment. This instrumentation has the characteristic of being sensitive to water vapor within the containment. Plots of containment air dew point variations above a base-line maximum established by the cooling water temperature to the air coolers should be sensitive to incremental leakage equivalent to 2 to 10 gpm.
The sensitivity of this method depends on cooling water temperature, containment air temperature variation, and containment air recirculation rate.
6.5.1.2.5 Containment Sump Leakage Measuring System This leak detection method is based on the principle that the leakage collected by the containment sump will be pumped to the waste holdup tank, with pumping time directly related to the quantity of leakage. Sump pump running time is monitored in the control room, and will provide an indication of deviation from normal leakage rates to the operator.
Revision 2511/26/14 KPS USAR 6.5-2 Since the fan-coil units drain to the Containment Vessel sump, (Sump A) all condensation from primary coolant leaks is directed to the containment sump. The difference between the volume of leakage within Containment Sump A at the high level alarm setpoint and the volume of leakage within Containment Sump A at the sump pump auto shutdown setpoint is used for determining leakage rates into the sump. This known volume, divided by the time it takes for leakage into Sump A to refill the sump to its high level alarm setpoint indicates the average leakage into the sump during the time period under consideration. Detection of leakage rates greater than 10 gpm are possible within 30 to 40 minutes. Larger leakage rates are detectable in much shorter time periods. Leak rates of less than 0.5 gpm can be detected by this method.
A break in the reactor pressure vessel or the service water lines within the abandoned containment enclosure would result in water flowing into the containment sump. Leakage to this sump would be indicated by the frequency and duration of operation of the containment sump pumps.
6.5.1.2.6 Deleted 6.5.1.2.7 Deleted 6.5.1.2.8 Deleted 6.5.1.2.9 Deleted 6.5.1.2.10 Liquid Inventory Gross leakage, might also be indicated by an abnormal containment sump level. High level in this sump will actuate an alarm.
6.5.1.2.11 Deleted 6.5.1.2.12 Component Cooling System If the leakage is from an available part of the Component Cooling System, it would be directed by floor drains to an Auxiliary Building sump. The Auxiliary Building sump pumps then transfer the leakage to the waste holdup tank.
Revision 2511/26/14 KPS USAR 6.5-3 6.5.1.2.13 Deleted 6.5.2 Deleted 6.5.2.1 Deleted 6.5.2.2 Deleted 6.5.2.3 Deleted 6.5.2.4 Deleted 6.5.3 Deleted 6.5 References[Deleted]
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Revision 2511/26/14 KPS USAR 6.5-4 Intentionally Blank
Revision 2511/26/14 KPS USAR 6.6-1 6.6 DELETED 6.6.1 Deleted 6.6.1.1 Deleted 6.6.2 Deleted 6.6.3 Deleted 6.6.4 Deleted 6.6.4.1 Deleted 6.6.5 Deleted 6.6.6 Deleted 6.6 References[Deleted]
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