ML14113A092

Updated Final Safety Analysis Report, Revision 20, Chapter 8.0, Electric Power

ML14113A092
Person / Time
Site:	LaSalle
Issue date:	04/11/2014
From:	Exelon Generation Co
To:	Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
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ML14113A099	List: ML14113A082 ML14113A083 ML14113A084 ML14113A085 ML14113A086 ML14113A088 ML14113A089 ML14113A090 ML14113A091 ML14113A092 ML14113A093 ML14113A094 ML14113A110 ML14113A112 ML14113A114 ML14113A115 ML14113A116 ML14113A117 ML14113A118 ML14113A119 ML14113A120 ML14113A132 RS-14-128, LaSalle, Units 1 & 2, Submittal of Updated Final Safety Analysis Report (Ufsar), Revision 20 RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Appendix a RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 1.0, Introduction and General Description of Plant RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 10.0, Steam and Power Conversion RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 11.0, Radioactive Waste Management RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 13.0, Conduct of Operations RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 14.0, Initial Test Program RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 15.0, Accident Analyses RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 16.0, Technical Specifications RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 17.0, Quality Assurance RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 2.0, Figure 2.5-19., Sheet 40 Through Figure 2.5-92 RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 2.0, Figures 2.1-1 Through Figure 2.5-19., Sheet 39 RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 2.0, Site Characteristics RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 4.0, Reactor RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 5.0, Reactor Coolant System and Connected Systems RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 6.0, Engineered Safety Features RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 7.0, Instrumentation and Control Systems RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 8.0, Electric Power RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 9.0, Auxiliary Systems RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Chapter 9.0, Figure 9.1-1 Through Figure 9.4-1 RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Table of Contents and List of Effective Pages RS-14-128, LaSalle, Units 1 & 2, Updated Final Safety Analysis Report, Revision 20, Technical Requirements Manual RS-14-128, Updated Final Safety Analysis Report, Revision 20, Technical Specifications Bases
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Text

LSCS-UFSAR 8.1-1 REV. 13 CHAPTER 8.0 - ELECTRIC POWER

8.1 INTRODUCTION

The Commonwealth Edison Company (CECo) offsite electric power system connections to LaSalle County Station (LSCS), described in detail in Section 8.2, are designed to provide a diversity of reliabl e power sources which are physically and electrically isolated so that any single failure can affect only one source of supply and cannot propagate to alternate sources.

The onsite electric power system is descri bed in detail in Section 8.3. The station auxiliary electric power system is design ed to provide electrical isolation and physical separation of the redundant power supplies for station requirements which are important to nuclear safety. Means are provided for automatic detection and isolation of system faults. In the event of total loss of auxiliary power from offsite sources, auxiliary power required for safe shutdown is supplied from diesel generators located on the site. The diesel generators are physically and electrically independent. Each power source, onsite an d offsite, is physically and electrically independent up to the point of connection to the engineered safety features (ESF) system power buses. Loads important to plant safety are split and diversified between independent ESF switchgear groups.

Batteries are provided as sources of control power for the ESF electric power systems. The safety loads that require electric power to perform their safety function are identified by function to be performed an d are included in Tables 8.1-1 and 8.1-2 (a-c loads) and 8.3-10 through 8.3-13 (d-c loads). The electrical systems which power the ESF loads use IEEE standa rds as far as they apply.

The functions of these safety loads ar e described in Chapters 6.0 and 7.0.

The safety design bases used for the Class 1E electric systems are given in Table 1, "Design Basis Events," of IEEE 308-1974, " IEEE Standard Criteria for Class 1E Electric Systems for Nuclear Power Generating Stations." The electric power system provides a reliable source of power for the reactor recirculation pumps and other auxiliaries during normal operation, and for engineered safety features during abnormal and accident conditions.

The plant consists of two main generating units designated as Unit 1 and Unit 2. Each main generator is directly connected to two half-size main power transformers through an isolated phase electrical bus duct. The two half-size main power transformers are connected in parallel at their high and low voltage terminals and LSCS-UFSAR 8.1-2 REV. 20, APRIL 2014 transform the output of each generator fr om generator voltage to a nominal 345-kV transmission system voltage.

The output of each unit's main power transformer is connected to a 345-kV switchyard section consisting of circuit breakers, disconnect switches, buses, and associated equipment arranged in a ring bus configuration as shown in Figure 8.1-1.

Four overhead 345-kV transmission lines di stribute power to the various points on the transmission system.

The 345-kV system provides redundant powe r sources to the two system auxiliary power transformers through two 345-kV ring buses (Figure 8.1-2). Each system auxiliary transformer has sufficient capacity to handle the auxiliary power requirements of one unit. Each of these auxiliary power supplies is available, through circuit breaker switching, to a ll emergency auxiliary equipment of both units and therefore serves as a redundant offsite source of essential auxiliary power. Normal auxiliary power for each unit is supplied from the unit auxiliary power transformer, which is connected to the generator leads, and from the system auxiliary power transformer, which is co nnected to a 345-kV ring bus. Startup auxiliary power is provided through the system auxiliary power transformers via any one of the four 345-kV transmission lines which make up the offsite sources.

8.1.1 Offsite

Power Systems - Summary Description The CECo transmission system is interco nnected with the MAIN (Mid-America Interpool Network) region utilities.

Four 345-kV transmission lines connect the station to the transmission system, as shown in Figure 8.1-1.

Electric energy generated at the station is stepped up to 345 kV by the main power transformers and fed into the station' s 345-kV transmission terminal, which consists of ten circuit breakers and fo ur transmission lines. The four 345-kV overhead lines exit the station via two separate rights-of-way and are connected into CECo's 345-kV system at the Braidw ood Station and the Plano transmission substation.

The 345-kV transmission term inal is also connected to the 138-kV transmission system at LaSalle through a 345/138 kV tran sformer as shown in Figures 8.1-1 and 8.1-2. The 138 kV bus is connected to two 138 kV overhead lines that are routed to Kickapoo Creek and Mazon. The 138 kV tran smission system prov ides power to the river screen house and on-the site 12-kV distribution system.

LSCS-UFSAR 8.1-2a REV. 14, APRIL 2002 A one-line diagram of the transmission sy stem interconnections and the 345-kV bus arrangement is shown in Figure 8.1-1. Two of the 345-kV transmission lines are in service for Unit 1. The remaining two lines apply for service with Unit 2.

The stations' 345-kV transmission terminal buses, which are continuously energized, serve as the preferred power source for the station's safety loads. Two physically independent circuits are provided for each unit, one via the unit's LSCS-UFSAR 8.1-3 REV. 13 assigned system auxiliary transformer, and the other from the system auxiliary transformer of the other unit.

Each circuit emanates from a separate, distinct transmission terminal ring bus section and is brought to the plant via separate transmission towers and right-of-way.

In addition, removable links are provided in the main generator leads which, when removed, make a third source of offsite auxiliary power available to each unit by backfeeding the unit auxiliary transformer through the main transformer.

8.1.2 Onsite

Power Systems - Summary Description

The main power system is designed for the generation of electric power which serves: (a) for distribution to the offsite power system, and (b) to provide an independent source of onsite power for the onsite station auxiliary electric power system. The onsite auxiliary electric power system is designed to provide reliable power service to those auxiliaries necessary for generation and to those auxiliaries important to nuclear safety. The design also provides for the electrical isolation and physical separation of redundant engineered safety feature power supplies and for the automatic detection and isolation of system faults.

Loads important to plant safety are divided into three groups and are fed from redundant Class 1E safety feature (ESF) switchgear groups.

The safety design bases used for the Class 1E electric systems are given in Table 1, "Design Basis Events," of IEEE 308-1974, " IEEE Standard Criteria for Class 1E Electric Systems for Nuclear Power Generating Stations." In the event of total loss of auxiliary power from offsite and main power sources, the auxiliary power required for safe shutdown is supplied from redundant Class 1E diesel generators located on the site. The diesel generators are physically and electrically independent. Each ESF division power source, diesel-generator and offsite, is physically and electrically inde pendent up to the point of connection to the ESF power system bus.

Batteries are provided as sources of control power for the ESF electrical power systems. The engineered safety featur es electric systems are designed in accordance with industry standards, criteria, regulatory guides, and other documents insofar as they apply except as otherwise indicated in the text.

LSCS-UFSAR 8.1-4 REV. 13 There are no provisions for startup without offsite power. A sufficient number of stations on the Commonwealth Edison Company system have "black start" capability to supply adequate startup power to the remaining stations.

8.1.2.1 Unit Auxiliary Power System

The basic function of the auxiliary a-c power system is to provide power for plant auxiliaries during startup, operation, and shutdown and to provide highly reliable redundant power sources for loads which are necessary to plant safety. The auxiliary a-c power systems for the two-unit plant are shown in Figures 8.1-2 and 8.1-3. A full-capacity unit auxiliary transformer is provided for each unit. These transformers are connected directly to their respective main generator buses, as shown on the diagram, and are capable of supplying all of the auxiliary power requirements of a unit during normal operation.

A full-capacity system auxiliary transformer is also provided for each unit. Each of these transformers is supplied from separa te sections of the 345-kV ring bus as shown on the diagram and provides highly reliable auxiliary power supplies to both units from the 345-kV system. Both transf ormers are normally energized and thus provide an available offsite supply to the auxiliaries of both units.

As shown in Figure 8.1-3, power from th e auxiliary transformers (UAT 141 and SAT 142 for Unit 1 and UAT 241 and SAT 242 for Un it 2) is distribu ted from five 4160-volt switch groups and two 6900-volt switch groups per unit. The 4160-volt switch groups which supply power to engineered safety features are buses 141Y, 142Y, and 143 for Unit 1 and 241Y, 242Y, and 243 for Unit 2; those which supply power to non-safety-related (NSR) equipment are buses 141X and 142X for Unit 1 and buses 241X and 242X for Unit 2. The 6900-volt switch groups supplying power to non-safety-related buses are 151 and 152 fo r Unit 1 and 251 and 252 for Unit 2.

Each of the seven switch groups, except bus 143 (243), can be fed from either UAT 141 (241) or SAT 142 (242).

Bus 143 (243) can be fed on ly from SAT 142 (242). Upon a tripout of the main generator, those switch groups which, at that time, are fed from UAT 141 (241) are transferred auto matically to SAT 142 (242) so that all seven switch groups of Unit 1 (2) will cont inue to be energized and are available for operating auxiliaries as required for a safe and orderly shutdown. In case of a tripout of SAT 142 (242) all switch groups transfer to UAT 141 (241) except for bus 143 (243), which is then fed by diesel generator 1B (2B).

8.1.2.2 Unit Class 1E A-C Power System All of the ESF equipment required to shut down the reactor safely and to remove reactor decay heat for extended periods of time following a loss of offsite power LSCS-UFSAR 8.1-5 REV. 13 and/or a loss-of-coolant accident are supplied with a-c power from the Class 1E a-c power system. That portion of the station auxiliary power system which supplies a-c power to the ESF is designated as the Class 1E a-c power system. The unit Class 1E a-c power system is divided into three divisions (Divisions 1, 2 and 3 for Unit 1; Divisions 1, 2 and 3 for Unit 2), each of which is supplied from a 4160-volt bus (141Y, 142Y, and 143 for Unit 1 respectively).

Two ESF groups (Division 2 and 3) of each unit are supplied standby power from individual diesel-generator units, while th e third ESF group (Division 1) for each unit obtains its standby power from a comm on diesel-generator unit, "0", which serves either of the corresp onding switch groups in each unit (Bus 141Y or 241Y). With this arrangement, alternate or redu ndant components of all ESF systems are supplied from separate switch groups so that no single failure can jeopardize the proper functioning of redundant ESF.

The assignment of ESF equipment to the three electrical divisions for each unit is indicated in Table 8.1-1. The division of the ESF loads among the system buses is such that the total loss of any one of the three electrical divisions cannot prevent the safe shutdown of the reactor under any normal or abnormal design condition.

In the event of loss of of fsite power supplies to an ES F 4160- volt switch group, there are provisions for automatic trippi ng of offsite supply circuit breakers, automatic shedding of certain non-ESF loads, automatic starting of the diesel generator, and automatic closing of the di esel-generator supply circuit breaker. Provisions are also made for sequential starting of certain ESF loads so as to prevent excessive overload of the diesel generators during their starting periods.

Automatic transfer capabilities are also pr ovided in which failure of the normal supply causes immediate tripping of the normal supply breaker and closing of an alternate supply breaker.

8.1.2.3 Unit Reactor Protection System (RPS) Power System The RPS power system includes the motor-generator power supplies and distribution panels with associated control and indicating equipment and the sensors, relays, bypass circuitry, and switches that cause rapid insertion of control rods (scram) to shut the reactor down.

Power to each of the two reactor protection trip systems is supplied, via a separate bus, by its own high-inertia a-c motor-generator set.

Alternate power is available to either reactor protection system bus from a transformer connected to a bus fed from th e standby electrical power system. An interlock prevents feeding both reactor protection system buses simultaneously from this transformer.

LSCS-UFSAR 8.1-6 REV. 20, APRIL 2014 8.1.2.4 Unit Class 1E D-C Power System A 250-volt battery is provided for each unit to supply po wer to the turbine emergency bearing oil pumps, generator emergency seal oil pumps, backup feed to the computer, and RCIC system, as shown in Figure 8.3-9 for Unit 1. This figure is directly analogous to Unit 2 250-Vdc system.

Each unit is provided with three physically separate and electrically isolated sources of 125-Vdc ESF power (each with its own battery, battery charger, and distribution bus). Figures 8.3-10, 8.3-11, and 8.3-12 include in single-line from the Unit 1 125-Vdc systems. These figures ar e directly analogous to the Unit 2 125-Vdc systems.

The a-c power supply for the various ESF system auxiliaries is of prime importance and is almost entirely dependent upon the supply of 125-Vdc power to control the switchgear, relays, solenoid valves, instruments, etc.

8.1.2.5 Unit Non-Class 1E D-C System

One 125-Vdc system is required for operat ion of equipment at the river screen house. The control power for the 345-kV switchyard breakers is supplied by two 58-cell, 125 volt, 270 ampere-hour batteries (non-safet y-related) located in the switchyard relay house. The design of the protecti ve relay circuits for the 345-kV oil circuit breakers and the 345-kV transmission lines is such that the loss of either battery or the loss of both batteries and associated feeder cables will not cause the loss of offsite power sources. Two protective relay systems are used on each transmission line and two trip coils are used on each 345-kV oil circuit breaker to assure tripping of faulted equipment (see Figure 8.1-4).

The control power for the 138kV switchyard equipment is suppl ied by one 58-cell 125 volt, 365 ampere-hour battery (non safety related) located in the switchyard relay house. Two protective relay systems are used on each transmission line and one trip coil is used on each 138kV oil circuit breakers (see Figure 8.1-4).

The switchyard batteries and feeder cabl es are not physically or electrically associated with the station Class 1E battery circuits.

The physical design of the switchyard control power supplies incorporates the following features:

LSCS-UFSAR 8.1-7 REV. 20, APRIL 2014 a. Three control power supplies, each consisting of a battery, battery charger, and distribution cabinet, are located in the relay house.

b. Two separate cable pan systems in the relay house basement.

c. Two separate access ducts for cables to exit relay house basement (one at each end of building).

d. Two separate concrete trou gh systems for feeder cable distribution in the switchyard proper.

Two independent +

24-Vdc systems are provided as the power supply for the neutron-monitoring and process radiation monitoring systems (Figure 8.3-6). This figure applies to Unit 1 but is directly analogous to the Unit 2 system.

8.1.3 Identification

of Class 1E Loads Nuclear safety-related systems and components that require electrical power to perform their nuclear safety function are defined as Class 1E loads.

Table 8.1-1 lists systems that require power to perform their nuclear safety functions. All electrical loads within these systems that are essential to the system nuclear safety function are therefore Class 1E loads.

The systems listed in Table 8.1-2 do not perform nuclear safety functions.

Tables 8.1-4 through 8.1-10 present detailed listings of station Class 1E loads.

Table 8.1-3 lists the industry electrical standards and codes which were used in the design of LSCS.

LSCS-UFSAR TABLE 8.1-1 TABLE 8.1-1 REV. 15, APRIL 2004 POWER ASSIGNMENT OF SAFETY/RELATED SYSTEMS TO ELECTRICAL DIVISIONS FOR SEPARATION DIVISION 1 DIVISION 2 DIVISION 3 RHR A **RHR B & C HPCS LPCS Automatic depressurization B Diesel generator 1B (2B)

Automatic depressurization A

• Inboard isolation valves 125-Vdc system 3

• Outboard isolation valves Diesel generator 1A (2A} 4160-volt bus 143 (243) Diesel generator 0 ESF 125-Vdc system 2 480-volt MCC 143-1 (243-1)

ESF 125-Vdc system 1 4160-volt bus 142Y (242Y) Auxiliary support systems, power and control for the preceding 4160-volt bus 141Y (241Y) 480-volt buses 136X (236X) and 136Y (236Y) 480-volt buses 135X (235X) and 135Y (235Y) SBGT **RCIC **Fuel pool emergency makeup B **Standby liquid control A **Standby liquid control B

• • Fuel Pool Emergency Makeup A MSIV-LCS Combustible gas control MSIV-LCS (U2 deleted, U1 abandoned-in-place)

ESF 250-Vdc system 1 Aux. equip. room HVAC system OA (OB) 480-Volt MCC 135X-1 (235X-1) MCC 135X-2 (235X-2) MCC 135X-3 (235X-3)

MCC 135Y-1 (235Y-1) MCC 135Y-2 (235Y-2)

Control room HVAC system OA (OB)

Auxiliary support systems, power and control for the preceding 480-volt MCC 136X-1 (236X-1) MCC 136X-2 (236X-2) MCC 136X-3 (236X-3) MCC 136Y-1 (236Y-1) MCC 136Y-2 (236Y-2) Auxiliary support systems, power and control for the preceding

• • All entries are ESF powered except those designated.

NOTE: Items in parenthesis indica te corresponding Unit 2 designations

• Divisional assignment of isolation valves takes precedence over the ESF system divisional assignment.

LSCS-UFSAR TABLE 8.1-2 TABLE 8.1-2 REV. 13 NON-SAFETY-RELATED EQUIPMENT FED FROM CLASS 1E POWER SUPPLIES SYSTEM POWER SOURCE ESF DIVISION Control rod drive feed pump 1A (2A) 4160-volt bus 141Y (241Y) 1 Primary containment water chiller 1A (2A) 4160-volt bus 141Y (241Y) 1 480-volt switchgear 133 (233) 4160-volt bus 141Y (241Y) 1 Control rod drive feed pump 1B (2B) 4160-volt bus 142Y (242Y) 2 Suppression pool cleanup & transfer pump 1A (2A) 4160-volt bus 142Y (242Y) 2 Suppression pool cleanup & transfer pump 1B (2B) 4160-volt bus 141Y (241Y) 1 480-volt switchgear 134X and 134Y (234 & 234Y) 4160-volt bus 142Y (242Y) 2 Primary containment water chiller 1B (2B) 4160-volt bus 142Y (242Y) 2 Primary containment vent supply fan 1A (2A) 480-volt bus 135Y (235Y) 1 Cleanup recirculation pump 1A (2A) 480-volt bus 135Y (235Y) 1 Primary containment vent supply fan 1B (2B) 480-volt bus 136Y (236Y) 2 Turbine building 480-volt motor control center 136Y-3 (236Y-3) 480-volt bus 136Y (236Y) 2 Recirc. MG Set Drive Motor 1A (2A) Breaker 1A 4160-volt bus 141Y (241Y) 1 Recirc. MG Set Drive Motor 1B (2B) Breaker 1B 4160-volt bus 142Y (242Y) 2 LSCS-UFSAR TABLE 8.1-3 TABLE 8.1-3 REV. 0 LIST OF NUCLEAR SAFETY ELECTRICAL DESIGN CRITERIA

1. IEEE Standard 279-1971 - "Criteria for Protection Systems for Nuclear Power Generating Stations."

2. IEEE Standard 308-1971 - "Standard Criteria for Class IE Electric Systems for Nuclear Power Generating Stations."

3. IEEE Standard 317-1971 - "Criteria for Electrical Penetration Assemblies in Containment Structures for Nuclear Power Generating Stations."

4. IEEE Standard 323-1971 - "General Guide for Qualifying Class I Electric Equipment for Nuclear Powe r Generating Stations."

5. IEEE Standard 336-1971 - "Installation, Inspection and Testing Requirements for Instrumentation and Electric Equipment during the Construction of Nuclear Po wer Generating Stations."

6. IEEE Trial-Use Standard 338-1971 - "Criteria for the Periodic Testing of Nucl ear Power Generating Station Protection Systems."

7. IEEE Standard 344-1971 - "Guide for Seismic Qualification of Class I Electric Equipment for Nuclear Power Generating Stations," (ANSI N41.7).

8. IEEE Trial-Use Standard 379-1972 - "Guide for the Application of the Single-Failure Criterion to Nuclear Power Generating Station Protection Systems," (ANSI N41.2).

9. IEEE Trial-Use Standard 382-1972 - "Guide for the Type Test of Class I Electric Valve Operators for Nuclear Power Generating Stations," (ANSI N41.6).

10. IEEE Standard 383-1974 - "Type Test of Class IE Electric Cables, Field Splices, and Connec tions for Nuclear Power Generating Stations."

11. IEEE Trial-Use Standard 387-1972 - "Criteria for Diesel-Generator Units App lied as Standby Power Supplies for Nuclear Power Generating Stations."

LSCS-UFSAR TABLE 8.1-4 TABLE 8.1-4 REV. 14, APRIL 2002 BUSES SUPPLIED BY UNIT AND SYSTEM AUXILIARY TRANSFORMERS BUSES SUPPLIED DIRECTLY BUSES SUPPLIED BY BUS TIES UNIT NUMBER TRANSFORMER NUMBER BUS NUMBER kV BUS NUMBER kV 1 141 151 6.9 141Y (ESF) 4.16 1 141 152 6.9 142Y (ESF) 4.16 1 141 141X 4.16 1 141 142X 4.16 1 142 151 6.9 141X 4.16 1 142 152 6.9 142X 4.16 1 142 141Y (ESF) 4.16 1 142 142Y (ESF) 4.16 1 142 143 (ESF) 4.16 2 241 251 6.9 241Y (ESF) 4.16 2 241 252 6.9 242Y (ESF) 4.16 2 241 241X 4.16 2 241 242X 4.16 2 242 251 6.9 241X 4.16 2 242 252 6.9 242X 4.16 2 242 241Y (ESF) 4.16 2 242 242Y (ESF) 4.16 2 242 243 (ESF) 4.16

LSCS-UFSAR TABLE 8.1-5 TABLE 8.1-5 REV. 0 4160-VOLT ESF BUSES FOR UNITS 1 AND 2

UNIT NUMBER ESF BUS NUMBER ESF DIVISION NUMBER kV DIESEL GENERATOR TIE TO BUSES 1 141Y 1 4.16 0 141X and 241Y 1 142Y 2 4 16 1A 142X and 242Y 1 143 3 4.16 1B None 2 241Y 1 4.16 0 241X and 141Y 2 242Y 2 4.16 2A 242X and 142Y 2 243 3 4.16 2B None LSCS-UFSAR TABLE 8.1-6 TABLE 8.1-6 REV. 14, APRIL 2002 LIST OF 480-VOLT ESF AUXILIARY POWER TRANSFORMERS FOR UNITS 1 AND 2 480-VOLT ESF AUXILIAR Y POWER TRANSFORMERS UNIT NUMBER ESF SUPPLY BUS NUMBER SUPPLIED TRANSFORMER NUMBER VOLTAGE kVA NOMINAL IMPEDANCE SAFETY CLASS 1 141Y 2 135X+Y 4160-480/277 1000 5.75% 1E (Division 1) 1 142Y 2 136X+Y 4160-480/277 1000 5.75% 1E (Division 2) 1 143 1 143-1 4160-480/277 225 3.30% 1E (Division 3) 2 241Y 2 235X+Y 4160-480/277 1000 5.75% 1E (Division 1) 2 242Y 2 236X+Y 4160-480/277 1000 5.75% 1E (Division 2) 2 243 1 243-1 4160-480/277 225 3.30% 1E (Division 3)

LSCS-UFSAR TABLE 8.1-7 TABLE 8.1-7 REV. 0 EQUIPMENT SUPPLIED BY 4160-VOLT ESF BUSES - UNIT 1

BUS NUMBER EQUIPMENT RATING CLASS 141Y Control rod drive feed pump 1A 300 hp Non-Class 1E 141Y Residual heat removal pump 1A 800 hp Class 1E 141Y Low-pressure core spray pump 1 1500 hp Class 1E 141Y PRI CNMT water chiller 1A 600 kW Non-Class 1E 141Y 4160/480-volt transformer 133 1000 kVA Non-Class 1E 141Y 4160/480-volt transformer 135X 1000 kVA Class 1E 141Y 4160/480-volt transformer 135Y 1000 kVA Class 1E 141Y Suppression pool cleanup & Transfer pump 1B 450 hp Non-Class 1E 141Y Recirc. MG Set drive motor 1A 400 hp Non-Class 1E 142Y Control rod drive feed pump 1B 300 hp Non-Class 1E 142Y Residual heat removal pump 1B 800 hp Class 1E 142Y Residual heat removal pump 1C 800 hp Class 1E 142Y Suppression pool cleanup and transfer pump 1A 450 hp Non-Class 1E 142Y PRI CNMT water chiller 1B 600 kW Non-Class 1E 142Y 4160/480-volt transformer 134X 1000 kVA Non-Class 1E 142Y 4160/480-volt transformer 134Y 1000 kVA Non-Class 1E 142Y 4160/480-volt transformer 136X 1000 kVA Class 1E 142Y 4160/480-volt transformer 136Y 1000 kVA Class 1E 142Y Recirc. MG Set drive motor 1B 400 hp Non-Class 1E 143 High-pressure core spray pump 3000 hp Class 1E 143 4160/480-volt transformer 143-1 225 kVA Class 1E

LSCS-UFSAR TABLE 8.1-8 TABLE 8.1-8 REV. 0 EQUIPMENT SUPPLIED BY 4160-VOLT ESF BUSES - UNIT 2 BUS NUMBER EQUIPMENT RATING CLASS 241Y Control rod drive feed pump 2A 300 hp Non-Class 1E 241Y Residual heat removal pump 2A 800 hp Class 1E 241Y Low-pressure core spray pump 2 1500 hp Class 1E 241Y PRI CNMT water chiller 2A 600 kW Non-Class 1E 241Y 4160/480-volt transformer 233 1000 kVA Non-Class 1E 241Y 4160/480-volt transformer 235X 1000 kVA Class 1E 241Y 4160/480-volt transformer 235Y 1000 kVA Class 1E 241Y Suppression pool cleanup and transfer pump 2B 450 hp Non-Class 1E 241Y Recirc. MG Set drive motor 2A 400 hp Non-Class 1E 242Y Control rod drive feed pump 2B 300 hp Non-Class 1E 242Y Residual heat removal pump 2B 800 hp Class 1E 242Y Residual heat removal pump 2C 800 hp Class 1E 242Y Suppression pool cleanup and transfer pump 2A 450 hp Non-Class 1E 242Y PRI CNMT water chiller 2B 600 kW Non-Class 1E 242Y 4160/480-volt transformer 234X 1000 kVA Non-Class 1E 242Y 4160/480-volt transformer 234Y 1000 kVA Non-Class 1E 242Y 4160/480-volt transformer 236X 1000 kVA Class 1E 242Y 4160/480-volt transformer 236Y 1000 kVA Class 1E 242Y Recirc. MG Set drive motor 2B 400 hp Non-Class 1E 243 High-pressure core spray pump 3000 hp Class 1E 243 4160/480-volt transformer 243-1 225 kVA Class 1E

LSCS-UFSAR TABLE 8.1-9 TABLE 8.1-9 REV. 13 EQUIPMENT SUPPLIED BY 480-VOLT ESF SUBSTATION BUSES - UNIT 1 BUS NUMBER EQUIPMENT RATING CLASS 135X RHR service water pump 1A 200 hp Class 1E 135X Diesel-generator cooling water pump "0" 125 hp Class 1E 135X Reactor building motor control center 135X-1 250 hp Class 1E 135X Auxiliary building motor control center 135X-2 325 hp Class 1E 135X Auxiliary building motor control center 135X-3 250 hp Class 1E 135Y RHR service water pump 1B 200 hp Class 1E 135Y Primary cont. ventilation supply fan 1A 100 hp Non-Class 1E 135Y Fuel pool emergency makeup pump 1A 75 hp Class 1E 135Y Cleanup recirculation pump 1A 100 hp Non-Class 1E 135Y Reactor building motor control center 135Y-1 250 hp Class 1E 135Y Reactor building motor control center 135Y-2 250 hp Class 1E 136X RHR service water pump 1C 200 hp Class 1E 136X Diesel-generator cooling water pump 1A 75 hp Class 1E 136X Auxiliary equipment room refrigeration unit 0A 125 hp Class 1E 136X Auxiliary equipment room air-cooled condenser fan 0A 100 hp Class 1E 136X Auxiliary Equipment room supply fan 0A 100 hp Class 1E 136X Reactor building motor control center 136X-1 250 hp Class 1E 136X Auxiliary building motor control center 136X-2 325 hp Class 1E 136X Auxiliary building motor control center 136X-3 250 hp Class 1E 136Y RHR service water pump 1D 200 hp Class 1E 136Y Control room refrigeration unit 0A 100 hp Class 1E 136Y Control room air-cooled condenser fan 0A 100 hp Class 1E 136Y Primary cont. ventilation supply fan 1B 100 hp Non-Class 1E 136Y Fuel pool emergency makeup pump 1B 75 hp Class 1E 136Y Reactor building motor control center 136Y-1 250 hp Class 1E 136Y Reactor building motor control center 136Y-2 250 hp Class 1E 136Y Turbine building motor control center 136Y-3 250 hp Non-Class 1E 136Y Hydrogen recombiner power cabinet 1PLF3J 125 kVA Class 1E LSCS-UFSAR TABLE 8.1-10 TABLE 8.1-10 REV. 13 EQUIPMENT SUPPLIED BY 480-VOLT ESF SUBSTATION BUSES - UNIT 2 BUS NUMBER EQUIPMENT RATING CLASS 235X RHR service water pump 2A 200 hp Class 1E 235X Reactor building motor control center 235X-1 250 hp Class 1E 235X Auxiliary building motor control center 235X-2 325 hp Class 1E 235X Auxiliary building motor control center 235X-3 250 hp Class 1E 235X Diesel-generator cooling water pump "O" 125 hp Class 1E 235Y RHR service water pump 2B 200 hp Class 1E 235Y Primary cont. ventilation supply fan 2A 100 hp Non-Class 1E 235Y Fuel pool emergency makeup pump 2A 75 hp Class 1E 235Y Cleanup recirculation pump 2A 100 hp Non-Class 1E 235Y Reactor building motor control center 235Y-1 250 hp Class 1E 235Y Reactor building motor control center 235Y-2 250 hp Class 1E 235Y Reactor building 480-volt power panel 235Y-3 160 kW Non-Class 1E 236X RHR service water pump 2C 200 hp Class 1E 236X Diesel-generator cooling water pump 2A 75 hp Class 1E 236X Auxiliary equipment room refrigeration unit 0B 125 hp Class 1E 236X Auxiliary equipment room air-cooled condenser fan 0B 100 hp Class 1E 236X Auxiliary equipment room supply fan 0B 100 hp Class 1E 236X Reactor building motor control center 236X-1 250 hp Class 1E 236X Auxiliary building motor control center 236X-2 325 hp Class 1E 236X Auxiliary building motor control center 236X-3 250 hp Class 1E 236Y RHR service water pump 2D 200 hp Class 1E 236Y Control room refrigeration unit 0B 100 hp Class 1E 236Y Control room air-cooled condenser fan 0B 100 hp Class 1E 236Y Primary cont. ventilation supply fan 2B 100 hp Non-Class 1E 236Y Fuel pool emergency makeup pump 2B 75 hp Class 1E 236Y Reactor building motor control center 236Y-1 250 hp Class 1E 236Y Reactor building motor control center 236Y-2 250 hp Class 1E 236Y Turbine building motor control center 236Y-3 250 hp Non-Class 1E 236Y Hydrogen recombiner power cabinet 2PLF3J 125 kVA Class 1E

LSCS-UFSAR TABLE 8.2-1 TABLE 8.2-1 REV. 18, APRIL 2010 BUS LOADINGS ASSUMED FOR OFFSITE POWER SUPPLY ANALYSIS LOAD MVA 6.9-kV Non-Safety-Related 32 4.16-kV Non-Safety-Related 15 4.16-kV Safety-Related 12

TOTAL 59

NOTE: The bus loading values are historical.

The current bus loading values are provided in the most recent AC auxiliary power system evaluations.

LSCS-UFSAR TABLE 8.2-2 TABLE 8.2-2 REV. 18, APRIL 2010 NO-LOAD VOLTAGES

BUS NO LOAD VOLTS PERCENT OF EQUIPMENT RATING Switchyard 362,000 ---

6.9-kV Non-Safety-Related 7,240 109.6 Unit Subs Fed From 6.9-kV 504 109.5 4.16-kV Safety-Related and Non-Safety-Related 4,365 109.1 Unit Subs Fed From 4.16-kV 504 109.5

NOTE: The no-load voltage values are historical. The current voltage values are provided in the most recent AC auxiliary power system evaluations.

LSCS-UFSAR TABLE 8.2-3 TABLE 8.2-3 REV. 14, APRIL 2002 RUNNING VOLTAGES AT SELECTED LOADS LOAD HP RATED VOLTAGE (VOLTS) RUNNING VOLTS PERCENT OF MOTOR RATED BUS Reactor Recirculating Pump 1B 8900 6600 6598 100.0 152 Circulating Water Pump 1B 2000 4000 3920 98.0 142X Service Water Pump 1B 1250 4000 3920 98.0 142X Service Water Jockey Pump 0A 350 4000 3930 98.2 142X Fuel Pool Emergency Makeup Pump 1A 75 460 442 96.1 135Y (141Y) Control Room Supply Fan 0A 50 460 426 92.6 136X (142Y) Fuel Pool Emergency Makeup Pump 1B 75 460 443 96.3 136Y (142Y) HPCS Diesel Generator Cooling Water Pump 100 460 439 95.4 143-1 (143) NOTE: The motor running voltage values are historical in nature. The mo st recent voltage values ar e provided in the latest AC auxiliary power system evaluation.

LSCS-UFSAR 8.4-1 REV. 13 8.4 OTHER ELECTRICAL FEATURES AND REQUIREMENTS FOR SAFETY This section presents other electrical fe atures and requirements for safety which deal with distinct aspects of the alternating current power systems and the direct current onsite emergency power systems, as well as selected items which are associated with these areas.

The other electrical features, requirements, and related matters for safety addressed in this se ction is as follows:

a. Containment electrical penetrations.

8.4.1 Containment

Electrical Penetrations Containment electrical penetrations are designed to meet Regulatory Guide 1.63.

Each primary containment medium and high voltage (6.9 kV, 4.16 kV, and 480 volt) electrical penetration circuit is provided with primary and backup primary containment penetration conductor overcurrent protective devices for those circuits that are required to be energized during reactor operation. Other circuits, which are not required during reactor operation are maintained deenergized. Table 8.4-1 (Unit 1) and 8.4-2 (Unit 2) list the pr imary containment conductor overcurrent protective devices that provide the required primary and backup overcurrent protection for circuits energized during reactor operation. The A.C. circuits inside primary containment that are deenergized during reactor operation are:

a. Installed welding grid systems 1A and 1B (Unit 1); 2A and 2B (Unit 2).

b. All drywell lighting circuits.

c. All drywell hoists and crane circuits.

LSCS-UFSAR TABLE 8.4-1 (SHEET 1 of 3) TABLE 8.4-1 REV. 9 UNIT 1 PRIMARY CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES DEVICE NUMBER AND LOCATION SYSTEM/COMPONENT POWERED

a. 6.9 kV Circuit Breakers 1. Swgr. 151 (Cub. 4, Bkr. 3A) RR Pump 1A, Primary - fast speed 2. Swgr. 152 (Cub. 4, Bkr. 3B) RR Pump 1B, Primary - fast speed 3. Swgr. 151-1 (Cub. 3, Bkr. 2A) RR Pump 1A, Primary - low speed 4. Swgr. 152-1 (Cub. 3, Bkr. 2B) RR Pump 1B, Primary - low speed 5. Swgr. 151-1 (Cub. 2, Bkr, 4A) RR Pump 1A, Backup - fast speed 6. Swgr. 152-1 (Cub. 2, Bkr. 4B) RR Pump 1B, Backup - fast speed b. 4.16 kV Circuit Breakers 1. Swgr. 141Y (Cub. 13, Bkr. 1A) RR Pump 1A, Backup - low speed 2. Swgr. 142Y (Cub. 14, Bkr. 1B) RR Pump 1B, Backup - low speed c. 480 VAC Circuit Breakers 1. Swgr. 136Y (Compt. 403C) VP/Pri. Cont. Vent Supply Fan 1B 2. Swgr. 135Y (Compt. 203A) VP/Pri. Cont. Vent Supply Fan 1A d. 480 VAC (Molded Case) Circuit Breakers 1. Backup breakers are located in the back of the respective MCC. a) MCC 136Y-2 (Compt. C4) RR/MOV 1B33-F067B b) MCC 136Y-2 (Compt. A3) RR/MOV 1B33-F023B c) MCC 134X-1 (Compt. B3) NB/MOV 1B21-F001 LSCS-UFSAR TABLE 8.4-1 (SHEET 2 of 3) TABLE 8.4-1 REV. 9 UNIT 1 PRIMARY CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES DEVICE NUMBER AND LOCATION SYSTEM/COMPONENT POWERED d) MCC 134X-1 (Compt. B4) NB/MOV 1B21-F002 e) MCC 136Y-1 (Compt. B2) (Normal) RH/MOV 1E12-F009 f) MCC 136Y-2 (Compt. C5) RI/MOV 1E51-F063 g) MCC 135Y-1 (Compt. A1) RR/MOV 1B33-F023A h) MCC 135Y-1 (Compt. A4) RR/MOV 1B33-F067A i) MCC 133-1 (Compt. C2) RT/MOV 1G33-F102 j) MCC 133-1 (Compt. E1) NB/MOV 1B21-F005 k) MCC 136Y-2 (Compt. B1) NB/MOV 1B21-F016 l) MCC 136Y-2 (Compt. E1) RH/MOV 1E12-F099A m) MCC 136Y-1 (Compt. E4) RT/MOV 1G33-F001 n) MCC 136Y-2 (Compt. A5) WR/MOV 1WR180 o) MCC 136Y-2 (Compt. D6) RH/MOV 1E12-F099B p) MCC 136Y-1 (Compt. H5) VP/MOV 1VP113B q) MCC 136Y-1 (Compt. H4) VP/MOV 1VP114A r) MCC 136Y-1 (Compt. H3) VP/MOV 1VP113A s) MCC 136Y-1 (Compt. H6) VP/MOV 1VP114B t) MCC 136Y-2 (Compt. A4) WR/MOV 1WR179 u) MCC 135Y-1 (Compt. D3) RT/MOV 1G33-F101 v) MCC 135Y-1 (Compt. D4) RT/MOV 1G33-F100 w) MCC 133-1 (Compt. C3) RT/MOV 1G33-F106 x) MCC 136Y-2 (Compt. D5) RI/MOV 1E51-F076 y) MCC 135X-1 (Compt. C2/C3) (Emerg) RH/MOV 1E12-F009 z) MCC 133-2 (Compt. AC1) VP/Drywell Cooler, 1VP15SA

LSCS-UFSAR TABLE 8.4-1 (SHEET 3 of 3) TABLE 8.4-1 REV. 9 UNIT 1 PRIMARY CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES

DEVICE NUMBER AND LOCATION SYSTEM/COMPONENT POWERED aa) MCC 133-2 (Compt. AB1)

VP/Drywell Cooler, 1VP15SE ab) MCC 133-2 (Compt. AB2)

VP/Drywell Cooler, 1VP15SD ac) MCC 134X-2 (Compt. H1)

VP/Drywell Cooler, 1VP15SB ad) MCC 134X-2 (Compt. H2)

VP/Drywell Cooler, 1VP15SC ae) MCC 134X-2 (Compt. J1)

VP/Drywell Cooler, 1VP15SF 2 Backup breakers are located in the front of the respective MCC. a) MCC 135X-2 (Compt. E4) VP/Pri. Cont. Vent Supply Fan 1A Backup b) MCC 136X-2 (Compt. G4) VP/Pri. Cont. Vent Supply Fan 1B Backup

LSCS-UFSAR TABLE 8.4-2 (SHEET 1 of 3) TABLE 8.4-2 REV. 9 UNIT 2 PRIMARY CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES DEVICE NUMBER AND LOCATION SYSTEM/COMPONENT POWERED

a. 6.9 kV Circuit Breakers 1. Swgr. 251 (Cub. 8, Bkr. 3A) RR Pump 2A, Primary - fast speed

2. Swgr. 252 (Cub. 7, Bkr. 3B) RR Pump 2B, Primary - fast speed

3. Swgr. 251-1 (Cub. 3, Bkr. 2A) RR Pump 2A, Primary - low speed

4. Swgr. 252-1 (Cub. 3, Bkr. 2B) RR Pump 2B, Primary - low speed 5. Swgr. 251-1 (Cub. 2, Bkr. 4A) RR Pump 2A, Backup - fast speed 6. Swgr. 252-1 (Cub. 2, Bkr. 4B) RR Pump 2B, Backup - fast speed

b. 4.16 kV Circuit Breakers 1. Swgr. 241Y (Cub. 1, Bkr. 1A) RR Pump 2A, Backup - low speed

2. Swgr. 242Y (Cub. 1, Bkr. 1B) RR Pump 2B, Backup - low speed

c. 480 VAC Circuit Breakers 1. Swgr. 236Y (Compt. 400A) VP/Pri. Cont. Vent Supply Fan 2B

2. Swgr. 235Y (Compt. 202C) VP/Pri. Cont. Vent Supply Fan 2A

d. 480 VAC (Molded Case) Circuit Breakers 1. Backup breakers are located in the back of the respective MCC. a) MCC 236Y-2 (Compt. C4) RR/MOV 2B33-F067B b) MCC 236Y-2 (Compt. A3) RR/MOV 2B33-F023B c) MCC 234X-1 (Compt. B3) NB/MOV 2B21-F001

LSCS-UFSAR TABLE 8.4-2 (SHEET 2 of 3) TABLE 8.4-2 REV. 9 UNIT 2 PRIMARY CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES DEVICE NUMBER AND LOCATION SYSTEM/COMPONENT POWERED d) MCC 234X-1 (Compt. B4) NB/MOV 2B21-F002 e) MCC 236Y-1 (Compt. B2) (Normal) RH/MOV 2E12-F009 f) MCC 236Y-2 (Compt. E4) RI/MOV 2E51-F063 g) MCC 235Y-1 (Compt. A1) RR/MOV 2B33-F023A h) MCC 235Y-1 (Compt. A4) RR/MOV 2B33-F067A i) MCC 233-1 (Compt. C2) RT/MOV 2G33-F102 j) MCC 233-1 (Compt. E1) NB/MOV 2B21-F005 k) MCC 236Y-2 (Compt. B1) NB/MOV 2B21-F016 l) MCC 236Y-2 (Compt. E1) RH/MOV 2E12-F099A m) MCC 236Y-1 (Compt. E4) RT/MOV 2G33-F001 n) MCC 236Y-2 (Compt. A5) WR/MOV 2WR180 o) MCC 236Y-2 (Compt. D6) RH/MOV 2E12-F099B p) MCC 236Y-1 (Compt. H5) VP/MOV 2VP113B q) MCC 236Y-1 (Compt. H4) VP/MOV 2VP114A r) MCC 236Y-1 (Compt. H3) VP/MOV 2VP113A s) MCC 236Y-1 (Compt. H6) VP/MOV 2VP114B t) MCC 236Y-2 (Compt. A4) WR/MOV 2WR179 u) MCC 235Y-1 (Compt. D3) RT/MOV 2G33-F101 v) MCC 235Y-1 (Compt. D4) RT/MOV 2G33-F100 w) MCC 233-1 (Compt. C3) RT/MOV 2G33-F106 x) MCC 236Y-2 (Compt. D5) RI/MOV 2E51-F076 y) MCC 235X-1 (Compt. C2/C3) (Emerg) RH/MOV 2E12-F009 z) MCC 233-2 (Compt. AC1)

VP/Drywell Cooler, 2VP15SA LSCS-UFSAR TABLE 8.4-2 (SHEET 3 of 3) TABLE 8.4-2 REV. 9 UNIT 2 PRIMARY CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES DEVICE NUMBER AND LOCATION SYSTEM/COMPONENT POWERED aa) MCC 233-2 (Compt. AB1) VP/Drywell Cooler, 2VP15SE ab) MCC 233-2 (Compt. AB2) VP/Drywell Cooler, 2VP15SD ac) MCC 234X-2 (Compt. H1) VP/Drywell Cooler, 2VP15SB ad) MCC 234X-2 (Compt. H2) VP/Drywell Cooler, 2VP15SC ae) MCC 234X-2 (Compt. J1) VP/Drywell Cooler, 2VP15SF

2. Backup breakers are located in the front of the respective MCC. a) MCC 235X-2 (Compt. AA4) VP/Pri. Cont. Vent Supply Fan 2A Backup b) MCC 236X-2 (Compt. AA4) VP/Pri. Cont. Vent Supply Fan 2B Backup

GEN. 1&2 25kV Rev. 20, April, 2014 345kV SW. YD. __________________________________________________ ____________________________________________________ / UNIT l-MArN TRANS IE '" lW 362.25 KV \ UNIT 2-MArN TRANS 2E '" 2W 345KV GRD.Y-23.7KV 6 625/700 INA 55'C/65'C FDA Z=8l!: UN. TRANS. 345kY GRD.Y -6.9kY GRD.V -4.16k V l!. 39/52/65 MVA-OA/FA/FOA I/) 55' C 345kV GRD.V-6.9kV WYE -4.16kV WYE-4.16kVA l!. 39/52/65 MVA-OA/FA/FOA I/) 55' C UN.TRANn lW IE GRD.Y-25KV 6 8211 INA 6SC ODAF b (ON 625 INA BASE) 2W 2E D.G. lA & 18 4.16kVA 0.8PF 2600 KW HPCS D/G 18 4-143-1 I SWGR 136Y o SYS. AUX. TR. 142 1522 23.7kY l!. -6.9kY GRD.Y-4.16kV GRD.Y 39/52/65 UVA-OA/FA/FOA I/) 55' C 1512 BUS 152 6.9kV BUS 151 6.9kV 142Y o 1000 I SWGR 134Y

• X SWGR 132A

• I 1319 III SWGR SWGR SWGR 132Y 131Y 137Y UNIT 1 NOTES X SWGR 133A NOS. NEAR THE TRANSF. ARE kVA RATINGS. 141Y o I: 135Y o REF. SINGLE-UNE DlAG. DWG. lE-l/2-4000A THRU E (FOB INFORMATION ONLY) NO-NOBt.W.1..Y OPEN; NC-NOBt.W.1..Y CLOSED; NCS-NOBt.W.1..Y CLSO. 0 STOBY. PWB. OPER. GEN., 1 GEN.#2 1.355,400 kVA .904PF 75,H 2 y x 23.7kY 6 -6.9kY GRD.Y-4.1 6k V GRD.Y 39/52/65 MVA-OA/F A/FOA I/) 55' C SYS. AUX. TR. 242 x V 2511 !i BUS 251 6.9kY !i 2522 4.16kV, 0.8PF 2600kW D/G 0 000 I: 235X o 000 I 2339 241 Y o 1 000 I: .. I .. 23 5Y o ESF DIVISION 1 ESF DIVISION 2 ESF DIVISION 3 NON-ESF

• X SWGR 2319 X SWGR 232A 000 D.G. 2A & 29 4.16kYA 0.8PF 2600 KW HPCS O/G 2B I: 4-236X 243-1 1 000 o 1 000 III I I SWGR SWGR SWGR SWGR 234Y SWG R 236Y 237Y 231Y 232Y UNIT 2 o .. I LA SALLE COUNTY STATION UPDATED FINAL SAFETY ANALYSIS REPORT FIGURE 8.1-3 ONE -LINE DIAGRAM -STATION AUXILIARY POWER DISTRIBUTION SYSTEM

STATE LINE N.1.P.S.CO.(SHEFFIELD)

BURNHAM N.I.PS.CO.(L.GEORGE)BLOOM A.E.P.CO.(OLIVE),0 WAYNE TO-'-..ITASCA AND JDES PLAINES , TO rr=====i=:J:==

ELMHURST I.P.CO.(BROKAW)TO C.I.L.CO..........

.,,,,,.,, (TAZEWELL)

POWERTON et: I.P CO.KINCAID".

-'J.I.PS.CO."ANA 81 PAWNEE)LA SALLE COUNTY STATION UPDATED FINAL SAFETY ANALYSIS REPORT FIGURE 8.2-1 TRANSMISSION SYSTEM INTERCONNECTIONS 1981 CONDITIONS REV.0-APRIL 1984 LSCS-UFSAR i ,_............

\I I*I I I I\,;i\II VI I I\-..i.I I LASALLE COUNTY STATION UPDATED FINAL SAFETY ANALYSIS REPORT FIGURE 8.2-2 PROPERTY PUN REV.13 TRANSMISSION LINE CROSSOVERS LA SALLE COUNTY STATION FIGURE B;2-3 ROIiTlIIG 01'fRANSMlS51011 CORRIDORS 1981 (OOOlflOIiS LA SALLE COUNTY STATION lIPlJAIl,O f ltiAL SAFETY ANALYSIS REPORT Wilton C8llte(rss (La B.-Plano RIQhl-of-Way) ill OVO!I 381(y.ll_6102 Ii 1413 (Lo 8011&-E051 Fronkforl Righl-ol-Woy)Over 345 Kv.lin**0301,0302,0303.

a 10805 (j)Over 346 Ky.Line 6014 6)Over 136 Ky.liOll 1207Under 165 Kv.line 11216Over 138 Ky.line 090 I<:f)NeO(138 Kv.Lin<l&11608 a 11613<J>Ova(138 Kv.Lina 0902 (j)Ove'138 Ky LIn&.0901 a 0902 Plano TSS o Sandwich , I I I f I I I I I IJ Fronkforl Fronkforl TSS I I I I IDI (i)/I/I/I I/I Dresden Slollon/-/I(j)-o@@//Morris Collin.I Stalion//

/1 Cool\IWllmklgtQn C,ly//0.-f"-,,$/...---L.-JBroldwood

@-....J/@II.a So1l8.0 County Malon Stollon REV.0-APIU!.1984 145-i,...Ifi-k'J.'#r..J.......t.'n.<JH"r a WI" It....ll.¥i,iL iii'",'r I" ItVA fff:.a.,,,/-.;

I't"'W HtH:*../x---vt>/I.'1':lliJa 114:K H6IlUtH;;l;!l Ai' if;VA t If..k: V lUX..J>1"""., ,,""'.*....Cf'"U.::;,.

tHj....:t!..dllMVt

""vi-fM.a;, Ht/1-'l Of'.O{jj)-'i tnn-l1IlU L HI:;

\(iF tjqoll\I..f}*!00$\(Jf B'iLS'i5.t teL!'lLA 5A...1..1: CGUN;t-OAfW t;'..

The running and starting voltages are historical in nature.The most recent voltage values are provided in the latest AC auxiliary power system evaluation.

Note: l'lltHtllM U:t AifLl lHtjfL'i:'

'ii'!.Ff;i<\If;}tttNHlW't l:,t;

"'Ml'>Rev 14, APRIL 2002 h h tit, a,,!]H..,\LH Ihrit.A.:I,1-I 142 ACt!:,!I,:!', 1'142-'IJ.:!l u.v.141.;:j.iiSH LH.l.k.ti.ELA'fti I..k.I---WidellI/o; WIN".)Ml.n tlUXIIIl lil\HINLYION.UIUT!illl";UIlCIl l.j,.j,tll.:OIlI IUI.A.)'REV.5-APRIL 1 HGIIH[ILl-I IJI OC K III A\ilWl"dAY AlIll LOtiTIlOl lHJ:, 14?Y, liGfA

[1m tH;1 Ii III till:)1!oj"0." I c)-M'!\L OGle llIACItAH:

BUS 143, IfIANSlulillLH Hi, tlllSLL ti,NIHfdUii III 1\l'>ii':KVt:

n:tW Tid P IU:LAYS HAIN THI P ItELAYS.... L,t'1,l, II I/-t+

BIL: I!ll!lIILjI';.!Il!.'('\I;E l'I':l.,\'i':

ji l')Lv V,,\)I!J rHW1'1{rg/,\NsF.1'1;11': Ih',,*-l"l l'llllll'1/\'IIi I P: F!""l,-,,,I, i',II 1, I Itl\nUl': ('IlHd"n:;;II, t, lid.

l'I"u!, ,,\TI\II': 1\'lld\'IL,lft(,wd.H'll':-,[l"j"dUll'II TKll';Illl'li ing:;t l:lt'drlll!l' Ullill'!'li\/\;:llhllc j",\,;-Vo]I,Ii:" AJ,;tUl iWTL: lJ.V n'LI\'s ,',0 HilS 151'lit':'iL'1[(l UjH'f,ltl,'

at lower vllltilhC" than U.V.1".,:lil)':;

011 HX" WilHlillg nf TH.141.LA SALLE COUNTY STATION UPDATED FINAL SAFETY ANALYSIS REPORT fiGURE 8.]-J aLOCK DIAGRAMAWl BUS 151 (fYP[(iIL)

REV,0-APRIL 1984 LSCS*UFSAR

'81"In-IYllll"-l 1 J21.'" I"...1101 IllS UU tOll'llllAGL\l21*ArIIJlll\

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£-6 LOW VOLT.emIT E1..755-0 E-17 eONT.ROD POS.IND.EL.755'-0" E-13 NEUTRON Et.756'-6"£-5 LOW VOLT.Et.756'-6" E-9 LOll VOLT.CO NT ELo S.E.QUADRANT---N£-15 CONT.RODnlD.E1..754-0 E-l1 NEUTRON MONIT.EL.754-0 N.W.QUADRANT LOW VOLT.eONT.754'-0"N*E.QUADRANT PWR.CONT.LA SALLE COUNTYUPDATED FINAL SAFETY ANALYSIS REPORT FIGURE 8.3-7 ELECTRICAL DRYWELL PENETRATIONS PLAN EL.740 FT 0 IN.REV.0-APRIL 1984 LSCSUFSAR ESF DIVISION 1/2 ESF DIVISION III E-27 SPARE E-21 INSTR S.E.QUADRANT E-22 SPARE S.W.QUADRANT[, THERMOCOUPLES go*N.W.QUADRANT N.E.QUADRANT EL.77">-0 E-23 A*_E1.775'-0" E-24 MED.VOLT.PWR.£L.772'-0" E-1 SPARE E1.E-26 A*E-20 INSTl'.EL.4-0 E-25 SPARE EL.771'-9" EL.771'-g" E-2 MED.VOLT.E1.A*Unit1-Spare, Unit 2 INSTR.LASALLE COUNTY STATTON UPDATED FINAL SAFETY ANALYSIS REPORT FIGURE 8.3-8 ELECTRICAL DRYWELL PENETRATIONS PLAN EL.761 FT 0 IN.REV.14, APRIL 2002 I KEY S=Current Shunt V Voltmeter A=Ammeter UV=Undervoltag8 Relay L=Located at Battery Charger or Bus Distributionl Instrumentation Panel R=Located on Control Room Panel 1(2)PMOIJSelector Switch 2S0-V (UNIT 1)UnSRY CHARGER U l l R (ESF-l)48o-v Mce 135X-3 00>>...;0............'"'" N 2S0-Vdc BUS tl L A tilllm.111;'1'.2S0-V (UNIT 1)l BATTERY CHARGER 11 2S0-Vdc NCC 12lX 250-Vde NCC 121Y--t (NQq-ESrl t-'--r-l)!t,o.

)N,')l U)N.O.t 1 1 (1y?TO TYPICAL TYPICAL TO UNIT 2 CIRCUrr CIRCUIT UNIT 2 NCC 22lX BREAKER BREAItER Mec 221Y TYPICAL'!YPICAL TYPICAL TYPICAL MOTOR MOIl MOIl MOTOR SURTER STARTER STARTSR STAilTER LA SALLE COUNTY STATION UPDATED FINAL SAFETY ANALYSIS REPORT FIGURE 8.3-9 250 Vdc Engineered Safety Feature DivisionI-Unit I L5CS-UFSAR (ESF-I)125-V 8ATTERY 1A GRND DET.L 125-Vdc DISTR.PANEL l11Y 1----CN,c')f)CN'O')f)TO;TYPICAL 125-Vdc OISTR.FEEDER PANEL 211Y 125-Vdc DISTR.PANEL l11XRA L (NON-ESF)<::;t 125-Vdc DISTR.PANEL 211 X SIGNAL CONY.R (Net TYPICAL FEEDER ALARM UNIT L (ESF-1)480V MCC 135X-3 (ESF-1)480V MeG 135X-3 125V DC BATTERY CHARGER 1M 125V DC BATTERY I-----J.-_-..L....1--, CHARGER lAB KEY: SAME AS FIGURE8..3-9 LASALLE COUNTY STATION UPDATED FINAL SAFETY ANALYSIS REPORT FIGURE 8.3-10 125-Vdc ENGINEERED SAFETY FEATURE DIVISION 1.....UNIT 1 REV.16, APRIL 2006 L.SCS-UFSAR (ESF-2)125-V BATTERY lB GRNO DET.L 125-Vdc OISTR.PANEL l12Y 2)---1 (Net (:oOt TYPICAL 125-Vdc DISTR.FEEDER PANEL 212Y 125-Vdc DISTR.PANEL 112X (NON-ESF)(N.D.))roJ 125-Vdc 0 rSTR.PANEL 212X SELECTOR SWITCH ,....----1 1 HS-DC 1 6£(Net TYPICAL FEEDER 125V DC BATTERY CHARGER lBA (ESF-2)480V MCC 136X-.3 (ESF2)480V Mee 136X--3 12SV DC BA.TTERY I----....J

,..._---1--1--, CHARGER lBB KEY: SAME AS FIGURE 8.3--9 LASALLE COUNTY STATION UPDATED FINAL SAFETY ANALYSIS REPORT FIGURE 8.3-11 125-Vdc ENGINEERED SAFETY FEATURE DIVISION2-UNIT 1 REV.16, APRIL 2006 LSCS-UFSAR c (\U Z u Z DC-'0)<I:--l<I!>ZZ wD Z;)U LA SALLE COUNTY STATION UPDATED FINAL SAFETY ANALYSIS REPORT<I!>zz wO V;U>l[)(IJI M lli i I (\o-V'I.FIGURE 8.3-12 KEY: Same as Figure 8.3-9 except that remote instruments are located on control room panel 1(2)Hl3-P60l FIGURE 8.3-12 125 V de Engineered Safety Feature Division3-Unit I REV.8-APRil 1992