ML19169A023

Amendment to Fire Protection Report, Chapter 2.0 - 2.3, Area (Public Version Pages 1-26,43-103, and 134)

ML19169A023
Person / Time
Site:	Byron, Braidwood
Issue date:	06/18/2019
From:	Mahesh Chawla Plant Licensing Branch III
To:	Exelon Generation Co
Chawla M, NRR/DORL/LPLIII, 415-8371
Shared Package
ML18355A456	List: ML19168A119 ML19168A216 ML19169A023 ML19169A113 ML19170A007 ML19170A012 ML19170A311 ML19170A336 ML19170A347 ML19170A384 ML19170A387 RS-18-144, Amendment 28 to Fire Protection Report, Chapter 4, Fire Protection Program
References
Download: ML19169A023 (88)

Text

B/B AMENDMENT 1 MARCH 1983 FPR SECTION/NRC QUESTION CROSS-REFERENCE GUIDE:

CHAPTER 2.0*

FPR SECTION QUESTION NUMBER 2.4 10.55 10.56 10.57 10.58 10.59 40.167 40.184 40.185 40.186 40.187 40.188

• The complete text of the questions and responses is given in the FSAR volumes entitled Responses to NRC Questions.

2.0-0

B/B AMENDMENT 20 DECEMBER 2002 2.0 FIRE HAZARDS ANALYSIS

2.1 INTRODUCTION

This section of the report contains the results of the Fire Hazards Analysis required by Sections A.2 and D.1(b) of Appendix A to Branch Technical Position APCSB 9.5-1. These results have been utilized in reevaluating the existing Fire Protection Program and in providing a basis for the comparison of this program with the guidelines of Appendix A. These results provide the information requested in Enclosure 2 to Mr. R. S. Boyd's letter to Mr. R. L.

Bolger of September 30, 1976.

To satisfy the NRC requirement for a qualified fire protection engineer, the assistance and technical direction of Schirmer Engineering Corporation was utilized in the initial preparation of this fire hazards analysis.

2.1.1 Assumptions This fire hazards analysis was based on the following assumptions:

a. Fire areas are designated, based on the existing conditions, as those portions of a building which are separated from other areas by physical boundaries whose construction approaches that of a rated fire barrier. This is necessary since the plant did not incorporate the "fire-area" concept in its original design. Based on the relatively low fire loading which exists throughout the plant, the fire resistance of existing barriers was found sufficient. For areas of high fire loadings, upgrading of some barriers was performed in areas where postulated fires might have affected safety-related systems.

b. Fire areas are further subdivided into fire zones for purposes of this analysis. Within the major plant structures, fire zone boundaries generally consist of walls, floors and ceilings of substantial construction. These boundaries could be qualified as 3-hour rated fire barriers if the openings and penetrations were properly protected with rated seals, dampers, doors, etc.

Separation of fire areas into zones is also accomplished in some cases by elevation. This has been done for convenience in the analysis, in that it is questionable that a credible fire will spread between elevations, even though there are floor openings for stairwells and equipment removal hatches. This assumption is based on the relatively low fire loading that generally exists throughout those areas. For equipment located outdoors, and for outbuildings, fire zone boundaries are somewhat arbitrarily assigned based primarily on distance and separation from other equipment and buildings.

2.1-1

B/B AMENDMENT 24 DECEMBER 2010

c. The calculation of fire loads in a given fire zone is accomplished by considering the effect of the potential total heat release on the total floor area. Although this does not account for combustible concentrations, it provides a more realistic picture of the effects of a potential fire than considering a maximum concentration in a limited area. The floor areas specified for each zone may be lower than the actual floor areas calculated from staion architectural and structural design drawings. The floor areas listed in the FHA are used in the station combustible load by the listed floor area.

Therefore, using a smaller floor area in the FHA will establish additional margin and create a more conservative heat load. Due to the spaciousness of a typical power plant, the total unimpeded area will function as a heat sink, to some extent, due to the temperature differentials that will be established by a 2.1-1a

B/B AMENDMENT 20 DECEMBER 2002 postulated fire. This method still provides a relative indication of areas of combustible concentrations and a basis for evaluation of fire barrier adequacy and protective system design.

d. The arbitrary 3-hour rating of barriers has not been used as suggested in BTP CMEB 9.5-1 but rather the fire hazards analysis was conducted. Most fire barriers in the plant had been designated and ratings determine prior to the issuance of NRC fire protection guidance documents. The analysis approach taken was to examine the fire loading in each zone and on the basis of the fire loading determine if the fire barriers are adequate. The factors considered when evaluating the adequacy of existing walls and floors, whether or not they carry a fire rating, include the following: 1) the materials of construction and design details of the wall or floor;

2) the combustible materials present in the area or zone, and the calculated fire loading; and 3) the potential impact of a fire in the area or zone on both safety-related and safe shutdown systems and components. A fire loading of less than 30,000 Btu/ft2, when the combustible material within the are or zone consists primarily of Class A combustibles, was assumed to be incapable of damaging exposed structural steel. The actual fire ratings of plant walls and floors are described in Section 2.3.

e. Transient fire loads are unidentified combustibles, generally given as being equivalent in Btu content to the fire load that would be contributed by the combustion of one or more 55-gallon drums of lubricating oil.

f. The design-basis fire for each individual zone is the most severe fire evaluated in both the Fire Hazard Analysis (FHA) and the Safe Shutdown Analysis (SSA). The design-basis fire is a non-mechanistic fire which is assumed to consume all combustibles within the fire zone. All unprotected equipment and cables which are subject to fire damage are assumed to be damaged. The design-basis fire concept dictates the design of protective measures. In the majority of areas, the design-basis fire is not considered a credible event.

Fire initiation is assumed, as is the failure of existing automatic protection systems as suggested in Brach Technical Position CMEB 9.5-1. Thus, the analysis is highly conservative.

g. Electrical cable tray fire propagation is limited by the provision of existing horizontal and vertical fire breaks. These breaks are described in Appendix 5.2.

2.1-2

B/B AMENDMENT 20 DECEMBER 2002

h. In the analysis of fires affecting fluid systems, the fluid system pressure integrity is assumed to remain intact. Fire damage assumptions for mechanical system components are as follows: Tanks, heat exchangers, passive check valves, and piping are assumed to be unaffected by fire, and their ability to perform their design function, both during and following the fire, is assumed to remain unimpaired. Manual valves are assumed to remain operable following extinguishment of the fire and return of the valve body and handle to the normal ambient temperature. Motor operated valves are assumed to be electrically disabled by fires; however, the valve itself, and its handwheel and associated gear train are assumed to be undamaged. Motor operated valves are assumed to remain operable via local manual action following extinguishement of the fire and return of the valve body, handwheel and related components to the normal ambient temperature. Solenoid operated valves and air operated, solenoid controlled valves are assumed to be electrically disabled by fires; these valves are assumed to fail to their loss of power/loss of air positions. If these valves are provided with manual operation capability, then they are assumed to remain operable via local manual action following extinguishment of the fire and return of the valve body and manual operator to normal ambient temperature. Pumps are assumed to be electrically disabled by fires; however, the pump body and fluid system pressure integrity are assumed to remain intact.

i. Within the limits of the separation criteria described in Appendix 5.2 and the protection afforded by the existing fire breaks, it is assumed that physical separation is maintained between redundant Class 1E circuits so that any fire is highly unlikely to affect its counterpart circuit.

j. Credit is taken for the tripping of breakers and other electrical protective devices to mitigate the consequences of electrical faults due to fires.

k. When it is shown that a fire involving a safety-related system will not propagate to its redundant counterpart, the availability of the second system is assumed.

l. A fire is not considered to occur simultaneously with other 2.1-2a

B/B AMENDMENT 28 DECEMBER 2018 accidents, events, or phenomena such as a design-basis accident.

The capability exists to safely shut down the reactor in the event of any design-basis fire which may occur, as demonstrated in Section 2.4, "Safe Shutdown Analysis."

m. To demonstrate safe shutdown capability, it is sufficient to show that at least two physically separate and electrically isolated duplicate system components are available to perform each required function such that if a fire prevents any component or system in the fire zone from functioning, the second will perform that function.

Safe shutdown capability following a fire in any fire zone of the plant is demonstrated in Section 2.4 Safe Shutdown Analysis.

2.1.2 Fire Hazards Analysis Methodology A systematic approach was established for the preparation of the Fire Hazards Analysis. Fire zones and areas were established based upon existing barriers.

The fire zones were then reviewed to identify fire hazards. Safety-related equipment and components which could be used for safe shutdown of the reactor were also identified. The combustible materials, the type of fire hazard, the quantity, the combustible loading which the material imposed on the area, and the fire detection and suppression capabilities for the area were then reviewed. The severity of the design-basis fire without any fire suppression activity was estimated based on the equivalent wood fire loading. Then the present fire barrier rating was compared with the fire severity for the subject zone to determine if the barrier was sufficient. Next the effects of the design-basis fire on the capability to safely shut down the reactor and the possible radioactive releases to the environment were evaluated. Finally, the distance required between two areas or pieces of equipment so that a fire could not propagate from one area to the other was checked.

Actual arrangement of the equipment and combustible materials in the area, location of doors, provisions of the ventilation system and the penetrations in the walls were considered. Existence of floor or equipment drains, curbs, and confining structures were considered to determine the effects of oil spills and fire fighting water.

2.1.3 Design Features and Criteria Features and criteria which are incorporated in the current station design which would assist in limiting the spread and adverse effect of a postulated fire are discussed below.

2.1.3.1 Station Layout The station general arrangement drawings, Figures 2.3-1 through 2.3-42, are plan and section views which indicate plant layout. It should be noted that the station layouts of Byron and Braidwood are 180 degrees out of phase with each other. The Fire Hazards Analysis was written based upon the Byron orientation. Thus, the descriptions of walls for the Braidwood Station are opposite those of the Byron Station. For example, the Fire Barrier Description might discuss features of the west wall. For Braidwood, the description would be the same but it would be for the east wall, etc.

2.1-3

B/B AMENDMENT 13 DECEMBER 1990 The station layout aids in the containment of fires by the utilization of area separation and segregation of combustibles. These figures do not necessarily give the exact locations of manual fire fighting equipment.

2.1.3.2 Fire Protection System Description 2.1.3.2.1 Design Basis Plant fire protection is provided by a loop fire header system, fire hose reels, and portable fire extinguishers. Selected areas are provided with fixed extinguishing systems which are designed in accordance with Nuclear Mutual Limited (NML) Property Loss Prevention Standards and the National Fire Protection Association (NFPA) Standards. Fire hose stations, portable extinguishers and fixed automatic extinguishing systems are shown on the applicable figures in Section 2.3.

2.1.3.2.2 Coverage A looped 12-inch yard main (14-inch at Braidwood) encircles the entire plant with fire hydrants spaced at approximately 250 feet intervals. This yard main can be isolated into at least four segments. The Turbine Building has a 12-inch loop header following the exterior walls of the Turbine Building. The Turbine Building is supplied by a 12-inch header which is fed from the yard main on both the Unit 1 and Unit 2 sides and from the Auxiliary Building loop header. The Auxiliary Building is fed from the yard main and from the cross connection to the Turbine Building mentioned above. The Reactor Containments and the Fuel Handling Building are fed from the Auxiliary Building 12-inch header. The Circulating Water Pump House or Lake Screen House is fed directly from the fire pump discharge header. Hose reels are located throughout the plant. Each hose reel contains 50 feet or more of 1-1/2-inch hose with appropriate nozzles and is supplied from a riser coming from one of the main headers.

Zones where oil or other combustible materials are stored or handled are provided with a fixed fire protection system as follows:

a. wet pipe sprinkler system

1. entire Turbine Building basement,

2. entire Turbine Building grade floor,

3. portions of Turbine Building mezzanine floor,

4. clean/dirty oil tanks room,

5. auxiliary boiler rooms,

6. station Auxiliary Diesel Generator room,

7. station Auxiliary Diesel Generator Oil Storage room,

8. diesel Fire Pump room, 2.1-4

B/B AMENDMENT 25 DECEMBER 2012

9. portions of Radwaste/Service Building,

10. Auxiliary Building Main Stairwells and hatchways,

11. Containment pipe penetration areas,

12. Auxiliary building waste oil tank,

13. Waste Treatment building waste oil tank,

14. Receiving Building Warehouse, and

15. Component cooling pumps on elevation 364 feet 0 inch.

b. deluge system

1. main power transformers,

2. unit auxiliary transformers,

3. system auxiliary transformers,

4. hydrogen seal oil units,

5. charcoal filters (manual),

6. turbine oil reservoir areas, and

7. turbine bearings.

c. foam systems

1. indoor diesel-generator oil storage tank rooms.

d. Halon 1301

1. QA vault (Service Building) and

2. Upper Cable Spreading Area.

e. carbon dioxide system

1. portions of Byron River Screen House,

2. diesel-generator and day tank rooms,

3. upper and lower cable spreading areas,

4. cable tunnels, and

5. diesel auxiliary feedwater pump and day tank rooms.

2.1-5

B/B AMENDMENT 13 DECEMBER 1990 2.1.3.2.3 Operation The wet pipe sprinkler systems are actuated by individual fusible sprinkler heads which are set to fuse at a fixed temperature. Water flow detection devices are provided to give an alarm. The automatic deluge systems are actuated by fire detecting devices on a predetermined rise in temperature.

The entire area is deluged with water by the opening of the electrically operated deluge valve. Alarms and interlocks are provided to indicate operation of the system and to monitor the system for malfunctions. Local manual controls are also provided for each system.

The carbon dioxide systems are supplied from a 10-ton carbon dioxide storage tank. The automatic carbon dioxide fire suppression systems are actuated by fire detecting devices. Local pushbutton stations will also actuate the control valves.

The carbon dioxide system at the main station is supplied from a 10-ton capacity storage tank. The Byron River Screen House is supplied with a 2-ton storage unit. The 10-ton units are also used for generator purging. A description of this system is provided in Appendix 5.4.

The upper cable spreading area Halon systems are supplied from bottles located in the Turbine Building. The Halon supply is sized for the largest hazard.

The QA vault system is supplied from bottles located in the service building.

Halon 1301 is used in these systems.

The fire protection system takes its water from the forebay of the Byron Circulating Water Pump House or Braidwood Lake Screen House. Pressure is maintained in the system by two motor-driven jockey pumps of 100 gpm capacity each. If the jockey pumps are unable to maintain system pressure, the motor-driven main fire pump is actuated. If the motor-driven fire pump is unable to meet the demand, or is not functional, the diesel-driven fire pump will automatically start. Both of the main fire pumps are rated for 2,500 gpm at 388 TDH. The diesel-driven fire pump is battery started and does not rely on external electrical power for operation.

In the event both of the main fire pumps should be out of service, water could still be supplied via the Essential Service Water system tie-in located in the Auxiliary Building. The tie-in is Category I.

2.1.3.2.4 Fire Protection System Description The description of the Byron/Braidwood Stations Units 1 and 2 Fire Protection System is contained in Appendix 5.4.

2.1.4 Generic Notes The following items are generally applicable to most fire zones, as listed in Section 2.3. They are listed under the heading in which they were utilized for convenience and brevity. The figures listed at the beginning of each zone's description illustrate that zone. Table 2.2-2 lists figures and equipment. Electrical figures showing the routing of ESF cable trays in the auxiliary and containment buildings are included in the report.

2.1-6

B/B AMENDMENT 13 DECEMBER 1990 2.1.4.1 Fire Barrier Descriptions

a. Structural design elements are as outlined in Section 2.3 of this report. The material descriptions as follows apply to these structural elements:

1. The concrete used in the construction of walls, floor slabs and roof slabs, and as a fire-resistant covering of embedded steel beams and columns, is of a mix which includes a proportion or carbonate-type aggregate. This aggregate is a factor in determining the fire resistance of these structural elements.

2. Hollow concrete masonry units used in the construction of walls and as a fire resistant covering of columns or beams conform to the applicable requirements of ASTM C-90 for Type I Grade "N" moisture controlled units. Units are formed from a mix containing lightweight, expanded slag aggregate. This aggregate is a factor in determining the fire resistance of walls or the masonry covering of steel members.

3. Solid concrete masonry units used in the construction of walls and as a fire resistant covering of columns or beams are 100%

solid and conform to the applicable requirements of ASTM C-145, Grade N, Type I moisture-controlled units. Units are formed from a mix containing normal weight aggregate, and have a density of 140 PCF.

This aggregate is a factor in determining the fire resistance of walls or a masonry covering of steel members.

4. With the exception of several Service Building walls, masonry units are laid in a standard running-bond pattern with 3/8-inch thick horizontal and vertical joints of type "M" mortar. (This mortar conforms to ASTM C-270.) Heavy-duty steel truss-type continuous reinforcing ties are provided in the horizontal joints at 16 inches on centers vertically.

5. Portions of masonry walls indicated as "removable areas" consist of solid concrete masonry units laid without mortar in a running bond pattern to completely fill the designated area of the permanent walls. These portions are braced on both faces of the wall by a system of steel columns, beams and steel grating panels, which also provides a resistance to seismic forces.

6. Firestops have been provided to seal the tops of firewalls as described in Section 2.3. The Thermafiber Safing Insulation used as the firestop material is a mineral fiber semirigid felt and, as installed, provides a fire resistance of three hours.

This resistance is determined from results of fire tests of similar assemblies as conducted by the United States Gypsum Company.

2.1-7

B/B AMENDMENT 13 DECEMBER 1990

7. All door openings in fire walls have been provided with self-closing fire doors as described in Section 2.3. The fire rating of the doors used is in all cases equivalent to the rating of the firewalls in which they are used. Many of these doors, including their frames and hardware, have been tested by Underwriters' Laboratories, Inc. of Chicago, Illinois. These doors are provided with a UL label, and are referred to in the text as Label "A" (or "B") doors. Other doors have not been tested by Underwriters' Laboratories, Inc. and thus do not have UL labels. These doors are referred to in the text as "fire doors of label construction."

These doors of label construction are constructed of the same materials and to the same standards as the UL labeled doors.

The hardware used with these doors is of the same high quality as that used with UL labeled doors. The installation of the door assembly in the firewall is identical to that of the UL labeled doors. Their fire resistance is thus equivalent to that of the doors with the UL label.

UL labels can only be applied to door assemblies (i.e., door plus frame and hardware) which have been previously tested by the Underwriters' Laboratories, Inc. At Byron/Braidwood, plant specific situations and requirements sometimes result in the installation of fire doors in a configuration which has not been tested by UL. Examples of such occurrences include:

a. Doors Larger Than UL Listed Sizes with Single Point Latches/Locks Doors were manufactured at a height of 8 feet 6 inch at a time when UL had not approved doors greater than 8 feet 0 inch in height with single point latches. UL procedures have now been approved for doors up to 10 feet 0 inch in height.

b. Doors with Modified Two-Point Latches and Electric Strikes The basic two-point latch and three-point lock system used on the project for double doors was a UL approved device.

Electric strikes were added to these devices for security purposes. It was therefore necessary to modify the two-point latch by off-setting its vertical rods to accommodate the strike which was installed in the inactive leaf. Although physically modified, the actual function of the two-point latch remained unchanged. The three-point lock remained intact without any physical or functional modification.

c. Fixed Doors Which Function as Fire Panels The function of these doors is equipment removal and not personnel ingress or egress. Due to nearby system 2.1-8

B/B AMENDMENT 18 DECEMBER 1998 locations these doors cannot be opened on hinges but must be completely detached and removed. Servicing is infrequent and the doors are generally in a closed position secured to a four-sided frame by 1-1/2 pairs of UL listed butts on both jamb sides of the frame.

Therefore, other fire hardware such as latches and closers are not necessary for fixed fire panels.

d. Door Frames with Applied Inverted Stops Some of the door frames installed in concrete openings are detailed with an applied door stop to conceal expansion anchor fasteners on the frame. This stop is inserted into a 14-gauge steel-formed rabbet in the frame and fastened with sheet metal screws at UL standard spacing. All frames are also filled with grout.

e. Magnetic Position Switches Welded to Frames Magnetic electric position switches are welded to the security fire door assemblies. These switches are welded to the top of the door and frame near the door closers.

f. Sheet Metal Electrical Raceways Welded to Doors Raceways are installed on double doors which have electric strikes. The raceway is welded to the face of the inactive leaf. This application is preferred to routing wiring through the inside of the door which would have required cutting of the door stiffeners.

g. Holes in Frames for Electrical Conduit Penetrations A cutout is made of the top corner of security/fire door frames which allows power transfer from one side of the door to the other. These cutouts are closed by welding a metal closure plate of equivalent gauge thickness across the opening. A hole is drilled in this plate to facilitate the electrical conduit connection.

h. Security Lock Guards As a security feature, Folger Adams 310-2-3 astragal lock guards are applied to security/fire door assemblies to prevent tampering with the lock bolt keeper. These lock guards are attached to the doors using 2-1/4 machine screws fasteners through the secure side of the door.

i. Door Pulls Added to Facilitate Closing Door pulls have been added to some fire doors to facilitate closing the door against differential air pressure that may exist across the fire barrier. The door 2.1-9

B/B AMENDMENT 23 DECEMBER 2008 pull handles are installed with through-door threaded sleeves, located where they will not affect the capability of the door to close and latch or resist deflection due to the heat of a fire. Because this hardware may not be UL listed, doors so modified are considered "fire doors of label construction."

j. Cardboard Shims for Door Alignment In accordance with fire door supplier recommendations, some labeled fire doors may have been aligned with the use of cardboard shims in the door hinge. The use of the shims ensures proper alignment of the door. The presence of the cardboard shim does not affect the capability of the door to close and latch or impact the fire endurance rating of the labeled door.

k. Doors Designated to Resist Blast Intrusion Blast Resistant Doors are installed in the vestibules of some critical access locations such as the Containment Building Emergency Airlocks. The doors have a steel framework and are filled with concrete. The doors have a single operating handle that latches multiple locking bolts into the door frame.

Some locations where fire doors of label construction have been used are described in Section 2.3. However, fire doors of label construction that are configured as described above may not be specifically identified in Section 2.3 in all cases.

The location of these doors is no longer specified in Section 2.3 since they are considered to be equivalent to UL label doors.

The Underwriters' Laboratories, Inc., do not "approve" the products of any manufacturer. The UL label on a product 2.1-9a

B/B AMENDMENT 19 DECEMBER 2000 only indicates that the product was tested by UL, and met certain performance standards. All of the fire doors installed at Byron/Braidwood are constructed of high quality fire resistant materials and are manufactured and installed to high standards which assure that they possess a fire rating equivalent to that specified for the barrier in which they are installed.

8. Elevator shaft doors are 1-1/2-hour fire rated doors that have been approved by Underwriters' Laboratories or by the Factory Mutual System of Norwood, Massachusetts.

9. Precast concrete channel roof slabs are of portland cement and lightweight aggregate and conform to the requirements of the American Concrete Institute Document 525-63. Slabs are of a "channel" design, 24 inches wide, having 3-1/2 inch thick reinforced concrete legs, and a 1-1/4 inch thick concrete web reinforced with steel welded wire fabric, and are anchored to supporting steel members with metal clips. Joints between slabs are sealed on the upper side with high-melting-point asphaltic cement.

10. The roof covering for all roofs of the plant is a four-ply builtup pitch, felt, and gravel roofing system over preformed board insulation, except as noted below. This roof covering complies in all respects with the applicable requirements of the Underwriters' Laboratories Inc. (UL) listing for a "Class A" rating. As stated in the UL Building Materials Directory, (1975) this rating applies to roof coverings which are effective against severe fire exposures and under such exposures "are not readily flammable and do not carry or communicate fire; afford a fairly high degree of fire protection to the roof deck; do not slip from position; possess no flying brand hazard; and do not require frequent repairs in order to maintain their fire resistive properties."

11. At Braidwood Station, the Turbine Building roof covering is an asphalt built-up roofing system and the Service/Radwaste Building roof covering is a single-ply membrane, fully adhered roofing system. These roofing systems comply in all respects with the applicable requirements of the UL listing for a Class A rating as indicated in the 1995 UL Roofing Materials and System Directory.

12. At Byron Station, the turbine building, TSC, and EM shop building roof coverings are a block-ballasted, single-ply, roofing system over insulated boards. The roofing system complies in all respects with the applicable requirements of the UL listing for a Class A rating as indicated in the 1995 UL Roofing Material and System Directory.

2.1-10

B/B AMENDMENT 28 DECEMBER 2018

a. HVAC penetrations in horizontal fire barriers consist of either two UL 1-1/2 hour fire dampers mounted in series or one 3-hour fire damper. These fire dampers are of the solid steel curtain type with interlocking blades and are of galvanized steel construction. The dampers shall close when the electrical thermal links receive an actuation signal or when the temperature exceeds the rating of the link.

b. In the fire hazards analysis portions of this report, Section 2.3, the assumption is made that all fire dampers are 1-1/2 hour labeled unless otherwise noted.

c. Locations of all rated fire barriers are shown symboli-cally on the drawings in Section 2.3. These drawings are not intended to show the detailed boundaries of rated fire barriers. They are as accurate as possible for drawings of this small scale. The text in Section 2.3 describes the fire barriers in more detail. Fire barrier location drawings, which are not included in the report, have been prepared and define explicitly the location and boundaries of all rated fire barriers in the plant.

13. Within the major plant structures, fire areas and fire zones are designated using the assumptions of FPR Section 2.1.1 and the methodology described in FPR Section 2.1.2.

Walls/ceilings/floors defining these fire zones may be non-fire rated, based upon the Fire Hazard Analysis performed for the Fire Zone. Non-fire rated walls/ceilings/floors are typically comprised of fire rated construction (poured concrete and/or concrete block), but are considered non-fire rated due to unsealed openings in the barrier, such as equipment hatches, stairwells, and other penetrations. Selected limited areas of the non-fire rated barrier may be sealed with fire rated seals to separate and protect specific equipment from a postulated fire on the other side of the barrier and/or to prevent the propagation of fire through the barrier from a specific hazard to the adjacent fire zone. These fire rated seals in non-fire rated walls/ceilings/floor will be repaired as necessary (following maintenance on penetrating systems or seal damage) to maintain the Fire Hazard Analysis evaluations of the barrier.

14. Firewall extension panels with a minimum 2-hour fire integrity rating have been added to the firewalls that separate the 1E and 1W main power transformers from each other, from the adjacent unit auxiliary transformers 141-1/2, and from system auxiliary transformer 142-1. The panels consist of modular sections of tube steel frames with fire resistant sheeting material (FBI Board) attached to its face. The fire resistant sheeting material is a composite board manufactured with a fiber-reinforced cementitious core and outer facings of perforated galvanized steel that are mechanically bonded to each surface of core material.

2.1-10a

B/B AMENDMENT 28 DECEMBER 2018 Firewall extension panels with a minimum 2-hour fire integrity rating have been added to the firewalls that separate the 2E and 2W main power transformers from each other, from the adjacent unit auxiliary transformers 241-1/2, and from system auxiliary transformer 242-1. The panels consist of modular sections of tube steel frames with fire resistant sheeting material (FBI Board) attached to its face. The fire resistant sheeting material is a composite board manufactured with a fiber-reinforced cementitious core and outer facings of perforated galvanized steel that are mechanically bonded to each surface of core material.

15. Referencing EC #404746, the configuration of unprotected auxiliary/secondary steel attached to protected structural steel is an acceptable configuration as the associated structural steel will maintain its required 3-hour fire barrier rating.

2.1-10b

B/B AMENDMENT 13 DECEMBER 1990 Section 2.3 describes the fire barriers in more detail. Fire barrier location drawings, which are not included in the report, have been prepared and define explicitly the location and boundaries of all rated fire barriers in the plant.

2.1.4.2 Safety-Related Equipment For the purpose of this report, safety-related equipment is defined to be any and all equipment that is Safety Category I. All safety-related equipment is not necessary to shut down the reactor. All equipment and instrumentation identified as being required to safely shut down the plant are listed in Section 2.4, "Safe Shutdown Analysis." Details of this classification system are indicated in Appendix 5.3.

2.1.4.3 Protection Criteria and Measures

a. Physical separation of redundant divisions of cables is accomplished by use of cable raceway system as described in Appendix 5.2.

b. Table 2.2-3 lists the fire protection system(s) available in each fire zone.

c. Amendment 9 includes revision to the "Protection Criteria and Measures" section of all fire zones to delete reference to equipment provided with Appendix R emergency lighting (i.e., 8-hour battery packs). Appendix R emergency lighting is shown on lighting drawings for each plant. These drawings are the appropriate design document to reference.

2.1.4.4 Combustible Materials

a. Cables do not use PVC insulation or jacketing. The cables can be considered to be self-extinguishing and nonflame propagating. For electrical equipment within the NSSS scope of supply, Westinghouse specified noncombustible or fire retardant material and conducts vendor-supplied specification reviews of this equipment which includes assurance that materials will not be used which may ignite or explode from an electrical spark, flame, or from heating, or will independently support combustion. These reviews also include assurance of conservative current-carrying capacities of all instrument cabinet wiring, which precludes electrical fires resulting from excessive overcurrent (I2 R) losses. For example, wiring used for instrument cabinet construction has teflon or tefzel insulation and is adequately sized based on current-carrying capacities set forth by the National Electric Code. Braided sheathed material is noncombustible.

b. Combustibles associated with the insulation inside each motor are negligible and are not considered.

c. Combustibles associated with cable insulation of conductors that are in rigid conduit are negligible and are not considered.

2.1-11

B/B AMENDMENT 19 DECEMBER 2000 The only combustibles considered in any of the control panels, switchgear, and motor control centers is the cable insulation. Any other combustibles that may be present in these panels is considered negligible and, therefore, not counted.

d. The combustion characteristics of both the cable insulation and jacketing materials are the same.

e. Each cell of the non-safety-related batteries at both stations are enclosed with a plastic jar and cover. The plastic jar and cover for each cell weighs approximately 10-1/4 pounds. The Btu value of the plastic is considered to be 14,600 Btu/lb. Therefore, it is assumed that each cell of the battery will have a rating of 149,650 Btu.

f. The specific heat loads of various combustibles are as follows:

Material Heat Content Lubricating Oil 155,000 Btu/gal Transformer Oil 135,700 Btu/gal Diesel Fuel Oil 156,000 Btu/gal Cable Insulation 10,990 Btu/lb Wood 9,100 Btu/lb Battery Casing (Acrylic Plastic) 14,600 Btu/lb Battery Casing (Polycarbonate) 13,310 Btu/lb Battery Casing (Transparent Fire Retardant PVC) 8,800 Btu/lb Battery Rail Covers (Fire Retardant Polyethlyene) 20,020 Btu/lb Battery Cell Spacers (PVC Blend) 17,860 Btu/lb Flex Connections 11,000 Btu/lb HEPA Filters 191,000 Btu/filter Prefilters 62,700 Btu/filter Charcoal Filters 15,000 Btu/lb 2.1-12

B/B AMENDMENT 19 DECEMBER 2000 Material Heat Content Duct External Insulation 2,500 Btu/lb Internal Duct Lining (Gasketing) 19,600 Btu/lb Mixing Box Blanket (Silencing Matr.) 11,600 Btu/lb Acetone 87,500 Btu/gal Methanol 64,500 Btu/gal Chlorethane 65,300 Btu/gal Cloth (Cotton) 8,800 Btu/lb Rubber 19,700 Btu/lb Hydrogen 325 Btu/ft3 Acetylene 1,500 Btu/ft3 Polyurethane Foam 13,600 Btu/lb Ethylene Glycol 76,100 Btu/gal Hydrazine 186,500 Btu/gal Propanol 96,700 Btu/gal Grease 161,600 Btu/gal 19,000 Btu/lb Polypropylene 20,000 Btu/lb Propane 21,700 Btu/lb Methane 23,900 Btu/lb Paper 8,500 Btu/lb

1. 2 Fuel Oil 146,000 Btu/gal Cellulose Filter 7,600 Btu/lb Benzene 131,900 Btu/gal Paint/ 139,382 Btu/gal Paint Thinner 2.1-13

B/B AMENDMENT 20 DECEMBER 2002 Material (Cont'd) Heat Content (Cont'd)

Polyethylene 20,000 Btu/lb Polyvinyl Chloride 7,730 Btu/lb (PVC)

Nylon 15,900 Btu/lb Acrylonitrile 15,200 Btu/lb Butadiene Styrene (ABS)

Fiberglass-Reinforced 14,000 Btu/lb Plastic (FRP)

Neoprene 11,500 Btu/lb Thermo-Lag Fire 7,000 Btu/lb Barrier Lead Shielding 4,883 Btu/ft2 Covering (vinyl-polyester) 2.1-13a

B/B AMENDMENT 13 DECEMBER 1990

g. Those combustibles with a flame spread less than 25, though described and listed in the combustibles sections, are ignored when calculating the fire loading.

This is a partial listing of those combustibles used:

Flame Fuel Smoke Material Spread Contribution Developed Thermafiber mineral insulation 15 0 0 Grograin II acrylic carpeting 15 10 25 ceiling acoustical tile 15 15 15 Initial Bigelow Grograin II carpet installation has a Class A rating in accordance with ASTM E 84 Tunnel Test as shown above. All future carpet installations and replacement shall have a Class I rating in accordance with the following criteria:

1) Flammability - ASTM E 648/Standard Test Method for Critical Radiant Flux of Floor Covering Systems using a Radiant Heat Energy Source.

Critical Radiant Flux - 0.45 w/cm2 or greater

2) Ignition - DOC-FF1-70/Tablet Test for Determining the Ease-of-Ignition of Carpet

3) Smoke Density - ASTM E 662/Standard Test Method for Specific Optical Density of Smoke Generated by Smoke Materials.

Smoke Developed - 450 or less Dm (corr.)

h. The insulation on piping was not considered in the heat load calculation because of its low "Btu" content, and the dispersed nature of this loading throughout the station.

i. The lubricant contained in motor-operated valves was not considered because of the limited number of those valves which contained a significant amount of lubricant and their spatial separation within the plant.

j. Combustible foam isolation materials are utilized in several circumstances within the plants to isolate expansion joints. The following typical situations where polyurethane foam is used have been identified and are described below:

2.1-14

B/B AMENDMENT 19 DECEMBER 2000

1. Inside the containment at Elevation 377'-0" there is a 2-inch isolation joint between the fill slab and the containment steel liner plate. The exposed surface of this joint at Elevation 377'-0" is protected by a 3-hour fire rated joint system.

2. There is a 2-inch joint between walls and slabs of the auxiliary building abutting with the exterior of the concrete containment. This joint is provided to allow movement of the structures during an earthquake. Where these joints are filled with polyurethane foam, they are typically protected with a 3-hour fire rated joint system.

3. There are abutting walls and slabs on the outside of the containment for the buttress enclosures and the emergency air lock where the isolation joint is filled with polyurethane foam and sealant. For some of these cases, the polyurethane foam is not protected by a fire resistant joint material. However, these areas are external to the containment and auxiliary building and are not included in the fire zones in the fire protection report. There is no safe shutdown equipment in these areas. Thus, the presence of small amounts of combustible joint materials in these locations is not of concern.

4. There are concrete partition walls in the auxiliary building which have a 1-inch isolation gap between the top of the wall and the underside of the ceiling slab, which may be filled with unprotected polyurethane foam and sealant. Where present, this material tends to be located in such a way as to present minimal exposure to roof contents.

In summary, combustible foam isolation materials are not included in the calculated combustible inventories for one or more of the following reasons: a) it is used in exterior structures, or b) it is protected with a fire-rated joint system, or c) it is present in small quantities, located in relatively unexposed positions, and is dispersed throughout the rooms or zones, rather than concentrated, and thus presents no significant hazard to the room contents.

k. Each cell of the 125-Vdc safety-related batteries at Braidwood is encased in a polycarbonate jar weighing 12 pounds and a flame retardant PVC cover weighing 1.5 pounds. The Btu values for the jar and the cover are 13,310 Btu/lb and 8,800 Btu/lb, respectively. Therefore, each cell has a rating of 172,920 Btu.

2.1-15

B/B AMENDMENT 26 DECEMBER 2014

l. Each cell of the safety-related 125-Vdc station batteries at Byron consists of a polycarbonate cell jar with a flame retardant PVC cover with a total heat content of 172,920 Btu/cell.

m. Permanently installed low voltage power cords, which are not assigned cable numbers in the SLICE cable management database, (or equivalent database) are not described in the FPR Fire Hazards Analysis and are not considered as a contributor to fire loadings. These cords are not heavily concentrated throughout the plant and the fire loading attributed to these cords is insignificant.

n. A blend of Number 1 and Number 2 diesel fuel oil may be stored or used in the diesel generator engines and diesel-driven pumps at Byron and Braidwood. According to NFPA 30, Flammable and Combustible Liquids, and FPR Appendix 5.5, Glossary of terms, any liquid that has a flash point at or above 100ºF (37.8ºC) and below 140ºF (60ºC) is classified as an NFPA Class II Combustible Liquid. According to NFPA 325M, Fire Hazard Properties of Flammable Liquids, Gases, and Volatile Solids, flash point for Number 1 diesel fuel oil is 100ºF and the flash point for Number 2 diesel fuel oil is 125ºF. Thus, a blend of Number 1 and Number 2, regardless of its blended percentage/proportion, is classified as Class II Combustible Liquid.

In addition, heat content (Btu/gal) of Number 2 diesel fuel oil is higher than Number 1 diesel fuel oil. Thus, it is conservative to use straight Number 2 diesel fuel oil instead of blended fuel for combustible loading since Number 2 diesel fuel oil provides bounding values for Class II Combustible Liquid.

2.1.4.5 Fire Loading

a. Fire loading has been classified as low, moderate or high. Guidance from the NFPA Handbook was used in developing the low, moderate, and high categories. The three classifications are defined as:

i. Low - Fire loading does not exceed an average of 100,000 Btu/ft2.

ii. Moderate - Fire loading exceeds an average of 100,000 Btu/ft2, but does not exceed 200,000 Btu/ft2.

iii. High - Fire loading exceeds an average of 200,000 Btu/ft2.

b. Fire loadings of less than 1000 Btu/ft2 are considered negligible.

2.1-15a

B/B AMENDMENT 16 DECEMBER 1994 2.1.4.6 Extinguishing and Detecting Capabilities

a. Hose station locations have been finalized and are shown as close as possible to their actual locations on the figures in Section 2.3.

Hose lengths and nozzle types are listed in Figure M-52, Sheets 11 and 12 located at the end of Appendix 5.4 in Volume II of this report.

b. Portable fire extinguisher locations are indicated symbolically in the figures in Section 2.3. These drawings are not intended to show the actual number and location of extinguishers, but rather to indicate those areas in which fire extinguishers are available.

Information on actual numbers, type, and locations of portable extinguishers is maintained at the site. The type of portable extinguishers used depends on the hazards which they may be used upon.

c. Fire detector locations are indicated symbolically in the figures in Section 2.3. These drawings are not intended to show the actual number and location of fire detectors, but rather to indicate those areas which are protected by automatic detection systems. Actual numbers and locations of fire detectors are shown on installation drawings which are not included in this report.

2.1.4.7 Design-Basis Fire A design-basis fire of less than 1000 Btu/ft2 is considered to be of minimal severity.

2.1-16

B/B AMENDMENT 24 DECEMBER 2010 2.2 AREA DESIGNATION The station is divided into fire areas as listed in Table 2.2-1. The area designation was based on Subsection IV.D, "Guideline for Specific Plant Areas" of Appendix A of BTP APCSB 9.5-1. The station is divided into the zones listed in Tables 2.2-2 and 2.2-3 and shown in Figures 2.2-1 through 2.2-30. The numbering system of Tables 2.2-2 and 2.2-3 is used throughout this report.

The digits before the decimal point of the zone designation corresponds to the numbers listed in Table 2.2-1 and are termed fire areas. In most cases, individual areas are further subdivided. In general, fire areas and zones are separated from each other by walls or barriers of noncombustible construction, or by distance. Numbering of fire zones within a fire area is generally sequential from the zone at the lowest elevation to the zone at the highest elevation; the numeral after the decimal point is this level/zone designation. When a particular elevation has numerous fire zones, these are usually identified by a letter after the second digit. For example, the Unit 1 Containment Spray Pump Room is located on level 11.2 and is identified as Fire Zone 11.2E-1. The numeral after the dash in the zone number indicates with which unit the zone is associated. For example, Fire Zone 1.1-1 is the zone at the lowest elevation in the Unit 1 Primary Containment. Some fire zones are associated with, or contain equipment from, both units. For example, Zone 2.1-0 is the Control Room, which serves both units.

Examples:

Fire Zones: 2.1 Control Room 11.3B Residual Heat Removal Heat Exchanger 2A Room Levels: 11.3 - Auxiliary Building zones, level 364 feet 0 inch Fire Areas: 2 - Control Room areas 11 - Auxiliary Building 2.2.1 Tabular Listing of Fire Zones Table 2.2-2 lists each fire zone. The zones are designated by name and number. The fire protection figure numbers for each zone are listed under the appropriate column in the table. The safety-related equipment in each zone is listed. The radioactive material in each zone is also listed.

2.2.2 Tabular Listing of Fire Hazards Data by Fire Zone Table 2.2-3 lists each fire zone by name and number. For each zone, the type of combustible materials estimated to be present is listed, as is the resultant fire loading classification for the zone. Also listed is the type of fire detection provided and the fire suppression systems/equipment available for each zone.

2.2-1

B/B AMENDMENT 13 DECEMBER 1990 TABLE 2.2-1 PLANT FIRE AREAS 1.0 Primary Containment 2.0 Control Room Areas 3.0 Cable Spreading Rooms 4.0 Plant Computer Rooms 5.0 Switchgear Areas 6.0 Remote Safety-Related Panels (Not Used) 7.0 Station Battery Room Areas 8.0 Turbine Building 9.0 Diesel-Generator Areas 10.0 Diesel Fuel Oil Storage Areas 11.0 Auxiliary Building 12.0 Fuel Handling Building 13.0 QA Record Storage Area 14.0 Radwaste Areas 15.0 Decontamination Areas (Not Used) 16.0 Safety-Related Water Tanks 17.0 Cooling Towers (Byron Station) 18.0 Miscellaneous Areas 2.2-2

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 FIRE HAZARDS ANALYSIS EQUIPMENT TABULATION FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 1.1-1 Unit 1 Spatial separation Heat detection misc grease, low (By) containment over reactor lube oil, cable low (Br) missile shield coolant pumps insulation 275 area (Unit 1 detection gal lube oil Zones 2, 3, 4 and transient load,

5) rubber hose, hydraulic fluid lead shielding blanket covers 1.1-2 Unit 2 Spatial separation Heat detection misc grease, low (By) containment over reactor lube oil, cable low (Br) missile shield coolant pumps insulation, area (Unit 2 detection rubber hose, Zones 2, 3, 4 and 275 gal lube oil

5) transient load, hydraulic fluid lead shielding blanket covers 1.2-1 Unit 1 Spatial separation Ionization (or gaskets, 275 gal low (By) annular area Note 1 photoelectric) lube oil transient low (Br) detection over load, cable penetration grease, area (Unit 1 flexible detection Zone 7) connections, cable insulation, lead shielding blanket covers 2.2-19

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 FIRE HAZARDS ANALYSIS EQUIPMENT TABULATION FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 1.2-2 Unit 2 Spatial separation Ionization (or gaskets, 275 gal low (By) annular area Note 1 photoelectric) lube oil transient low(Br) detection over load, cable penetration grease, area (Unit 2 flexible detection Zone 7) connections, cable insulation, lead shielding blanket covers 1.3-1 Unit 1 Manual charcoal Temperature lube oil, 275 gal low (By) containment deluge systems switches in lube oil transient low (Br) upper area (Unit 1 charcoal absorber load, suppression Zones banks 1A & 1B on grease, 11 & 12) Note 1 El. 426' (Byron) flexible (Byron only) ionization (or connections, photoelectric) HEPA filters, detection over prefilters, cable penetration charcoal, area (Unit 1 cable insulation, detection Zone 6) gaskets, 206 lb EPDM rubber of the reactor cavity seal (Byron transient load),

lead shielding blanket covers, PVC (BR), plastic (Byron), Note that Braidwood Unit 1 containment charcoal filter units have been abandoned in place with the Pre-filters, HEPA filters, and Charcoal absorber filters removed from their HVAC plenum. The deluge supply has been manually isolated and control room alarms to these units have been disabled.

2.2-19a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 FIRE HAZARDS ANALYSIS EQUIPMENT TABULATION FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 1.3-2 Unit 2 Manual charcoal Temperature lube oil, 275 gal low (By) containment deluge systems switches in lube oil transient low (Br) upper area (Unit 2 charcoal absorber load, suppression banks 2A & 2B on grease, Zones 11 & 12) El. 426' (Byron) flexible (Abandoned in ionization (or connections, place). Deluge photoelectric) HEPA filters, System isolated detection over prefilters, (Byron Unit 2) cable penetration charcoal, Note 1. area (Unit 2 cable insulation, detection (Zone 6) gaskets, 206 lb EPDM rubber of the reactor cavity seal (Byron transient load),

lead shielding blanket covers, PVC (BR), plastic (Byron only), Note that Braidwood Unit 2 containment charcoal filter units have been abandoned in place with the Pre-filters, HEPA filters, and Charcoal absorber filters removed from their HVAC plenum. The deluge supply has been manually isolated and control room alarms to these units have been disabled. Charcoal absorber filters removed (Byron).

2.2-19b

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 2.1-0 Control Room Note 1 Ionization (or 5.8 lb/ft2 office low (Byron) photoelectric) combustibles, low (Braidwood) detection (Unit 1 cable insulation detection Zone 75) gaskets, insulation, fiber optic cable, polyethylene (Braidwood),

Plastic and paper (Braidwood),

Plastic (Byron),

Acrylic plastic (Byron),

Polypropylene (Byron) 2.1-1 Note 1 Ionization (or paper, low Record storage photoelectric) 100 lb of paper room detection (Unit 1 transient, gaskets, detection Zone 70) insulation, Polypropylene, Polycarbonate Plastic (Braidwood) 2.1-2 Note 1 Ionization (or of paper, gaskets, low Record storage photoelectric) insulation, and toilet room detection (Unit 2 Polypropylene detection Zone 70) 3.1-1 Unit 1 Automatic total Ionization (or cable insulation, low (Byron) cable tunnel flooding carbon photoelectric) Thermo-Lag low (Braidwood) dioxide system detection (Unit 1 (Braidwood),

(Unit 1 detection Zone 64) gaskets suppression Fenwal thermal (Unit Zone 47) 1 detection Zone 65)

Note 3 3.1-2 Unit 2 Automatic total Ionization (or Thermo-Lag (Byron), low (Byron) cable tunnel flooding carbon photoelectric) cable insulation low (Braidwood) dioxide system detection (Unit 2 gaskets (Unit 2 detection Zone 64) suppression Fenwal thermal (Unit Zone 47) 2 detection Zone 65)

Note 3 3.2-0 Auxiliary Note 1 Ionization (or cable insulation, low (Byron) building photoelectric) gaskets, low (Braidwood)

El. 439'-0" detection (Unit 2 fiber optic cable, detection Zone 61) Thermo-Lag (Byron),

Polypropylene/nylon and acrylic plastic (Byron) 3.2A-1 Unit 1 Automatic total Ionization (or gaskets, low (Byron)

Nonsegregated flooding carbon photoelectric) cable insulation low (Braidwood) bus duct area dioxide system detection (Unit 1 and Thermo-Lag (Unit 1 detection Zone 49) suppression Fenwal thermal (Unit Zone 43) 1 detection Zone 50)

Note 3 3.2A-2 Unit 2 Automatic total Ionization (or gaskets, low (Byron)

Nonsegregated flooding carbon photoelectric) Thermo-Lag (Byron), low (Braidwood) bus duct area dioxide system detection (Unit 2 cable insulation (Unit 2 detection Zone 49) suppression Fenwal thermal (Unit Zone 43) 2 detection Zone 50)

Note 3

2.2-20 B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 3.2B-1 Lower Automatic total Ionization (or gaskets, low (Byron) cable spreading flooding carbon photoelectric) ducting low (Braidwood) area, Zone B-1 dioxide system detection (Unit 1 insulation, cable (Unit 1 suppres- detection Zone 51) insulation, sion Zone 44) Fenwal thermal fiber optic cable (Unit 1 detection Zone 52) Note 3 3.2B-2 Lower Automatic total Ionization (or flex low (Byron) cable spreading flooding carbon photoelectric) connections, low (Braidwood) area, Zone B-2 dioxide system detection (Unit 2 cable insulation, (Unit 2 suppres- detection Zone 51) fiber optic cable sion Zone 44) Fenwal thermal (Unit 2 detection Zone 52) Note 3 2.2-20a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 3.2C-1 Lower Automatic total Ionization (or cable insulationand low(Byron) cable spreading flooding carbon photoelectric) fiber optic cable, low (Braidwood) area, Zone C-1 dioxide system detection (Unit 1 (Unit 1 suppres- detection Zone 53) sion Zone 45) Fenwal thermal (Unit 1 detection Zone 53) Note 3 3.2C-2 Lower Automatic total Ionization (or cable insulation, low (Byron) cable spreading flooding carbon photoelectric) Thermo-Lag low (Braidwood) area, Zone C-2 dioxide system detection (Unit 2 (Braidwood),

(Unit 2 suppres- detection Zone 53) fiber optic cable sion Zone 45) Fenwal thermal (Unit 2 detection Zone 54) Note 3 3.2D-1 Lower Automatic total Ionization (or cable insulation and low (Byron) cable spreading flooding carbon photoelectric) fiber optic cable low (Braidwood) room, Zone D-1 dioxide system detection (Unit 1 (Unit 1 suppres- detection Zone 55) sion Zone 46) Fenwal thermal (Unit 1 detection Zone 56) Note 3 3.2D-2 Lower Automatic total Ionization (or cable insulation and moderate (Byron) cable spreading flooding carbon photoelectric) fiber optic cable moderate room, Zone D-2 dioxide system detection (Unit 2 (Braidwood)

(Unit 2 suppres- detection Zone 55) sion Zone 46) Fenwal thermal (Unit 2 detection Zone 56) Note 3 3.2E-1 Division 11 Automatic total Ionization (or cable insulation moderate (Byron) cable riser flooding carbon photoelectric) moderate dioxide system detection (Unit 1 (Braidwood)

(Unit 1 suppres- detection Zone 55) sion Zone 46) Fenwal thermal (Unit 1 detection Zone 56) Note 3 3.2E-2 Division 21 Automatic total Ionization (or cable insulation moderate (Byron) cable riser flooding carbon photoelectric) moderate dioxide system detection (Unit 2 (Braidwood)

(Unit 2 suppres- detection Zone 55) sion Zone 46) Fenwal thermal (Unit 2 detection Zone 56) Note 3 3.3A-1 Upper Automatic total Ionization (or lube oil, cable low (Byron) cable spreading flooding Halon 1301 photoelectric) insulation charcoal, low (Braidwood) room, Zone A-1 system (Unit 1 detection (Unit 1 flex connections, suppression Zone detection Zone 41) gaskets, 33); manual total Fenwal thermal ductwork insulation, flooding carbon (Unit 1 detection fiberglass filter dioxide system Unit Zone 42) modules 1 suppression Zone Temperature switch

48) 33 in charcoal Manual charcoal adsorber. Note 3 deluge system (Unit 1 suppression Zones 5 & 6) 2.2-21

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 3.3A-2 Upper Automatic total Ionization(or lube oil, cable low (Byron) cable spreading flooding Halon 1301 photoelectric) insulation, charcoal, low (Braidwood) room, Zone A-2 system (Unit 2 detection (Unit 2 flex connections, suppression Zone 33); detection Zone 41) gaskets, ductwork manual total flooding Fenwal thermal insulation, fiberglass carbon dioxide system (Unit 2 detection filter modules, fiber Unit 2 suppression Zone 42) optic cable Zone 48 Manual Temperature switch charcoal deluge in charcoal adsor-system (Unit 2 ber. Note 3 suppression Zones 5 &

6) 3.3B-1 Upper Automatic total Ionization (or ductwork insulation, moderate (Byron) cable spreading flooding Halon 1301 photoelectric) gaskets, lubricating moderate room, Zone B-1 system (Unit 1 detection (Unit 1 oil, flex connections, (Braidwood) suppression Zone 34); detection Zone 43) cable insulation, fiber manual total flooding Fenwal thermal optic cable carbon dioxide system (Unit 1 detection (Unit 1 suppression Zone 44). Note 3 Zone 49) 3.3B-2 Upper Automatic total Ionization (or ductwork insulation, moderate (Byron) cable spreading flooding Halon 1301 photoelectric) gaskets, lubricating moderate room, Zone B-2 system (Unit 2 detection (Unit 2 oil, flex connections, (Braidwood) suppression Zone 34); detection Zone 43) cable insulation fiber manual total flooding Fenwal thermal optic cable carbon dioxide system (Unit 2 detection (Unit 2 suppression Zone 44). Note 3 Zone 49) 3.3C-1 Upper Automatic total Ionization (or cable insulation, moderate (Byron) cable spreading flooding Halon 1301 photoelectric) Thermo-Lag (Byron), moderate room, Zone C-1 system (Unit 1 detection (Unit 1 ductwork insulation, (Braidwood) suppression Zone 35); detection Zone 45) gaskets, fiber optic manual total flooding Fenwal thermal cable (

carbon dioxide system (Unit 1 detection (Unit 1 suppression Zone 46). Note 3 Zone 50) 3.3C-2 Upper Automatic total Ionization (or cable insulation, low (Byron) cable spreading flooding Halon 1301 photoelectric) Thermo-Lag (Braidwood), low (Braidwood) room, Zone C-2 system (Unit 2 detection (Unit 2 ductwork insulation, suppression Zone 35); detection Zone 45) gaskets, fiber optic manual total flooding Fenwal thermal cable carbon dioxide system (Unit 2 detection (Unit 2 suppression Zone 46). Note 3 Zone 50) 3.3D-1 Upper Automatic total Ionization (or cable insulation. moderate (Byron) cable spreading flooding Halon photoelectric) Thermo-Lag moderate (Braidwood) room, Zone D-1 1301 system (Unit detection (Unit 1 (Braidwood),

1 suppression Zone detection Zone 47) ductwork 36); manual total Fenwal thermal insulation, flooding carbon (Unit 1 detection gaskets, fiber dioxide system Zone 48). Note 3 optic cable (Unit 1 suppression Zone 51) 2.2-22

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 3.3D-2 Upper Automatic total Ionization (or cable insulation, moderate (Byron) cable spreading flooding Halon 1301 photoelectric) ductwork insulation, moderate room, Zone D-2 system (Unit 2 detection (Unit 2 gaskets (Braidwood) suppression Zone 36); detection Zone 47) fiber optic cable manual total flooding Fenwal thermal carbon dioxide system (Unit 2 detection (Unit 2 suppression Zone 48). Note 3 Zone 51) 3.4A-1 Unit 1 Note 1 Ionization (or cable insulation moderate (Byron) cable riser photoelectric) moderate area elevation detection (Unit 1 (Braidwood) 451 feet-0 inch detection Zone 70) 3.4A-2 Unit 2 Note 1 Ionization (or cable insulation moderate (Byron) cable riser photoelectric) moderate area elevation detection (Unit 2 (Braidwood) 451 feet-0 inch detection Zone 70) 4.1-1 Unit 1 Note 1 Ionization (or paper, low (Byron) computer room photoelectric) cable insulation, low (Braidwood) detection (Unit 1 fiber optic cable, detection Zone 70) ductwork insulation, gaskets, wooden work tops (Braidwood only)

Miscellaneous office furniture and plastic cases for computer equipment (Byron),

Polypropylene 4.1-2 Unit 2 Note 1 Ionization (or paper, low (Byron) computer room photoelectric) cable insulation, low (Braidwood) detection (Unit 2 fiber optic cable, detection Zone 70) ductwork insulation, gaskets, wooden work tops (Braidwood only)

Miscellaneous office furniture and plastic cases for computer equipment (Byron),

Polypropylene 5.1-1 Note 1 Ionization (or gaskets, low (Byron)

Division 12 photoelectric) cable insulation low (Braidwood)

ESF switchgear detection (Unit 1 Acrylic plastic room detection Zone 77) (Byron), Polypropylene 5.1-2 Note 1 Ionization (or gaskets, low (Byron)

Division 22 photoelectric) cable insulation, low (Braidwood)

ESF switchgear detection (Unit 2 Polypropylene room detection Zone 77) 2.2-23

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 5.2-1 Division 11 Note 1 Ionization (or gaskets, cable low (Byron)

ESF switchgear photoelectric) insulation, low (Braidwood) room detection (Unit 1 Thermo-Lag detection Zone 78) (Byron),

Acrylic plastic (Byron),

Polypropylene (Byron) 5.2-2 Division 21 Note 1 Ionization (or gaskets, cable low (Byron)

ESF switchgear photoelectric) insulation, low (Braidwood) room detection (Unit 2 Acrylic plastic detection Zone 78) (Byron),

Polypropylene (Byron) 5.3-1 Unit 1 Note 1 Ionization (or cable insulation low Non-ESF switchgear photoelectric) and gaskets, room detection (Unit 1 Acrylic plastic detection Zone 66) (Byron)

Polypropylene 5.3-2 Unit 2 Note 1 Ionization (or cable insulation low Non-ESF switchgear photoelectric) and gaskets, room detection (Unit 2 Acrylic plastic detection Zone 66) (Byron),

Polypropylene 5.4-1 Division 12 Note 1 Ionization (or lube oil, cable low (Byron)

Misc. electrical photoelectric) insulation, low (Braidwood) equipment and detection (Unit 1 Thermo-Lag battery room detection Zone 67) (Braidwood),

polycarbonate and flame retardant PVC, fire retardant polyethylene for rail covers, and PVC blend for cell spacers (Braidwood),

gaskets, spot cooler duct (Byron), spot cooler PVC duct (Braidwood),

Acrylic plastic (Byron),

Polypropylene 2.2-23a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 5.4-2 Division 22 Note 1 Ionization (or lube oil, cable low (Byron)

Misc. electrical photoelectric) insulation, low (Braidwood) equipment and detection (Unit 2 polycarbonate, battery room detection Zone 67) flame retardant PVC fire retardant polyethylene for rail covers, and PVC blend for cell spacers (Braidwood),

gaskets, spot cooler duct, Acrylic plastic (Byron),

Polypropylene 5.5-1 Unit 1 Note 1 Ionization (or cable insulation, low (Byron) auxiliary photoelectric) gaskets, low (Braidwood) electrical detection (Unit 1 insulation, fiber equipment room detection Zone 69) optic cable (Braidwood),

Acrylic plastic (Byron),

Polypropylene (Byron) 5.5-2 Unit 2 Note 1 Ionization (or cable insulation, low (Byron) auxiliary photoelectric) gaskets, low (Braidwood) electrical detection (Unit 2 insulation, 8.3 lb equipment room detection Zone 69) fiber optic cable (Braidwood),

Acrylic plastic (Byron),

Polypropylene (Byron) 2.2-24

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 5.6-1 Division 11 Note 1 Ionization (or cable insulation, low (Byron)

Misc. electrical photoelectric) polycarbonate with low (Braidwood) equipment and detection (Unit 1 flame retardant battery room detection Zone 67) PVC, fire retardant polyethylene for rail covers, and PVC blend for cell spacers (Braidwood),

gaskets, Acrylic plastic (Byron),

Polypropylene 5.6-2 Division 21 Note 1 Ionization (or cable insulation, low (Byron)

Misc. electrical photoelectric) polycarbonate with low (Braidwood) equipment and detection (Unit 2 flame retardant battery room detection Zone 67) PVC, fire retardant polyethylene for rail covers, and PVC blend for cell spacers (Braidwood),

gaskets, flexible HVAC duct (Byron)

Acrylic plastic (Byron),

Polypropylene 7.1-1 Unit 1 BOP Note 1 Ionization (or acrylic plastic, low battery room photoelectric) Polypropylene detection (Unit 1 detection Zone 36) 7.1-2 Unit 2 BOP Note 1 Ionization(or acrylic plastic, low battery room photoelectric) Polypropylene detection (Unit 2 detection Zone 36) 8.1-0 Clean and Automatic Byron: Ionization lube oil, grease, High (Braidwood) dirty oil tank sprinkler system (or photoelectric) gaskets, High (Byron) room (Unit 1 detection (Unit 2 polypropylene suppression Zone detection Zone 23) (Byron)

21) Braidwood: None Acrylic Plastic (Byron),

Polycarbonate Plastic (Braidwood) 2.2-24a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 8.2-1 Turbine Automatic None lube oil and low (Byron) building basement, sprinkler system 55 gal transient low (Braidwood)

Unit 1 (Unit 1 lube oil suppression (Braidwood),

Zone 24) lube oil and 715 gal transient lube oil (Byron),

grease, polyethylene (Byron),

cable insulation gaskets, Miscellaneous combustibles totaling 89.5 x 106 Btu, hydrazine/amine (Braidwood),

polypropylene, acrylic plastic ,

Polypropylene/

Nylon (Byron), Fiber Optic Cable (Braidwood),

Polycarbonate Plastic (Braidwood) 8.2-2 Turbine Automatic None lube oil, grease, low (Byron) building basement, sprinkler system 55 gal lube oil low Braidwood)

Unit 2 (Unit 2 transient load, suppression polypropylene Zone 24) cable insulation gaskets, Miscellaneous combustibles totaling 76.7 x 106 Btu, acrylic plastic ,

Polypropylene/

nylon (Byron), Fiber Optic Cable (Braidwood),

Polycarbonate Plastic (Braidwood)

2.2-24b B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 8.3-1 Unit 1 Automatic Note 2 turbine oil, phosphate low (Byron) turbine building sprinkler system ester, lube oil, low (Braidwood) grade level Note 2 (Unit 1 turbine oil suppression purifier/conditioner, Zones 22 & 23) cable insulation 550 gal lube oil transient load, gaskets, Miscellaneous combustibles totaling 503 x 106 Btu, grease, hydrazine (Byron),

hydrazine (Braidwood),

polypropylene, nylon Kevlar curtain polyethylene nylon (Byron) fiber optic cable (Byron) HDPE piping (Braidwood)

(Braidwood) PVC DWV Pipe, acrylic plastic, Fiber Optic Cable (Braidwood),

Polycarbonate plastic (Braidwood) 8.3-2 Unit 2 Automatic Note 2 turbine oil, waste oil, low (Byron) turbine building sprinkler system phosphate ester, lube low (Braidwood) grade level Note 2 (Unit 2 oil, turbine oil suppression purifier/ conditioner, Zones 22 & 23) grease, cable insulation, 550 gal lube oil transient load, gaskets, Miscellaneous combustibles totaling 247 x 106 Btu.

Additionally at Byron:

hydrazine, cloth, rubber, plastic, polypropylene, polyurethane foam, paper, wood, solvent, gasoline, polypropylene, nylon Kevlar curtain polyethylene nylon (Byron) hydrazine concentrate (Byron),

amine concentrate (Byron) fiber optic cable (Byron),

(Braidwood) PVC DWV Pipe, acrylic plastic 400 Gal. Hydrazine (Braidwood), Fiber Optic Cable (Braidwood),

Polycarbonate Plastic (Braidwood)

2.2-25 B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 8.4-1 Unit 1 Automatic None diesel fuel oil, low (Braidwood) auxiliary boiler sprinkler system 55 gal lube oil low (Byron) room (Unit 1 transient load, suppression grease, lube oil, Zone 31) insulation, gaskets propane cylinder (Byron),

polypropylene, acrylic plastic Nylon (Byron),

Polycarbonate Plastic (Braidwood) 8.4-2 Unit 2 Automatic None grease, diesel low (Braidwood) auxiliary boiler sprinkler system fuel oil, lube low (Byron) room (Unit 2 oil, insulation, suppression gaskets, Zone 31) 55 gal lube oil transient load propane cylinder (Byron),

polypropylene, acrylic plastic Nylon (Byron),

Polycarbonate Plastic (Braidwood) 8.5-1 Unit 1 Automatic Note 2 lube oil, cable low (Byron) turbine building sprinkler system Ultraviolet insulation, low (Braidwood) mezzanine floor Note 2 (Unit 1 (Unit 1 detection 110 gal lube oil suppression Zone 37) transient load, Zones 19, 20) Byron only grease, gaskets, Miscellaneous combustibles totaling 750 x 106 Btu, polypropylene, fiber optic cable polycarbonate material, nylon, kevlar curtain, acrylic plastic Nylon (Byron), Fiber Optic Cable (Braidwood),

2.2-25a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 8.5-2 Unit 2 Automatic Note 2 lube oil, cable low (Byron) turbine building sprinkler system Ultraviolet insulation, fiber low (Braidwood) mezzanine floor Note 2 (Unit 2 (Unit 2 detection optic cable suppression Zone 37) 110 gal lube oil Zones 19, 20) Byron only transient load, grease, gaskets, Miscellaneous combustibles totaling 42.7 x 106 Btu. Additionally at Byron: wood, polypropylene, polyurethane foam, plastic, paper, gaskets, paint.

Visco Fluid (Braidwood only),

Rubber (Braidwood only),

polypropylene, nylon Kevlar curtain, acrylic plastic, Plastic (Braidwood)

Nylon (Byron),

Polycarbonate Plastic (Braidwood) 2.2-25b

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 8.6-0 Turbine Manual charcoal Temperature switch paper, wood, and low (Byron) building deluge system; (in charcoal plastic products, lube low (Braidwood) operating level (Suppression Zone absorber); Note 2 oil, hydrogen, 29, both units; Ultraviolet gaskets, duct Unit 1 suppression (Detection Zone insulation, cable Zones 8 and 9 for 36, both units) insulation, 165 gal charcoal filters) Byron only transient lube oil, grease, Automatic sprinkler Local smoke/heat charcoal (Byron),

(Unit 2 suppression detectors in two- Miscellaneous Zone 32) Note 1 story office bldg. combustibles totaling at Byron 25.6 x 106 Btu, Automatic sprinkler polyethylene at system (2-story Unit 2 Detection Braidwood, office structure Zone 1 Turbine Visco Fluid, rubber.

Building elevator Polypropylene.

shaft Two story office Bldg.

with misc.

combustibles, plywood sub-floor, cable insulation, nylon Kevlar curtain gasoline vinyl-polyester, PVC, Fiberglass (Byron),

acrylic plastic, Vinyl Tarp (Braidwood)

Nylon (Byron),

Plastic associated with portable generators (Byron),

Polycarbonate Plastic (Braidwood) 8.7A-0 Station None lube oil, grease, low (Braidwood) auxiliary diesel gaskets, polypropylene low (Byron) generator room (Byron)

Nylon and acrylic plastic (Byron) 8.7B-0 Station Automatic sprinkler None diesel fuel oil, High (Braidwood) auxiliary diesel (Unit 2 suppression gaskets, polypropylene High (Byron) oil tank room Zone 32) Note 1 (Byron) 9.1-1 Diesel- Automatic total Fenwal thermal & lube oil, grease, Moderate generator room 1B flooding CO2 system ultraviolet gaskets, 220 gal lube (Braidwood)

(Unit 1 suppression (Unit 1 detection oil transient load, Moderate (Byron)

Zone 37) Zone 71) polypropylene (Byron) cable insulation, polyethylene (Braidwood)

Nylon and acrylic plastic (Byron) 9.1-2 Diesel- Automatic total Fenwal thermal & lube oil, grease, Moderate generator room 2B flooding CO2 system ultraviolet gaskets, 220 gal lube (Braidwood)

(Unit 2 suppression (Unit 2 detection oil transient load, Moderate (Byron) zone 37) Zone 71) polypropylene (Byron) cable insulation, polyethylene (Braidwood)

Nylon and acrylic plastic (Byron) 2.2-26

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 9.2-1 Diesel- Automatic total Fenwal thermal & lube oil, grease, Moderate generator room 1A flooding CO2 system ultraviolet gaskets, (Byron)

(Unit 1 suppression (Unit 1 detection cable insulation, Moderate Zone 38) Zone 72) 220 gal lube oil (Braidwood) transient load, polypropylene (Byron) polyethylene (Braidwood)

Nylon and acrylic plastic (Byron) 9.2-2 Diesel- Automatic total Fenwal thermal & lube oil, Moderate generator room 2A flooding CO2 system ultraviolet grease, (Braidwood)

(Unit 2 suppression (Unit 2 detection gaskets, Moderate (Byron)

Zone 38) Zone 72) 220 gal lube oil transient load, polypropylene (Byron) cable insulation (Braidwood),

polyethylene FDRP 24-064 Nylon and acrylic plastic (Byron) 9.3-1 Diesel- Automatic total Fenwal thermal #2 fuel oil, b High (Braidwood) generator day flooding CO2 system polypropylene (Byron) High (Byron) tank room 1A (Unit 1 suppression Zone 40) 2.2-26a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 9.3-2 Diesel- Automatic total Fenwal thermal #2 fuel oil, High (Braidwood) generator day tank flooding CO2 system polypropylene High (Byron) room 2A (Unit 2 (Byron) suppression Zone 40) 9.4-1 Diesel- Automatic total Fenwal thermal #2 fuel oil, High (Braidwood) generator day tank flooding CO2 system polypropylene High (Byron) room 1B (Unit 1 (Byron) suppression Zone 39) 9.4-2 Diesel- Automatic total Fenwal thermal #2 fuel oil, High (Braidwood) generator day tank flooding CO2 system gaskets, High (Byron) room 2B (Unit 2 polypropylene suppression (Byron)

Zone 39) 10.1-1 Manual Fluoro Byron: Fenwal #2 fuel oil, High (Braidwood)

Diesel fuel protein foam rate compensating gaskets, flex High (Byron) oil storage extinguishing detectors connections, grease, room 1B system via spray ionization (or polypropylene nozzles (Unit 1 photoelectric) (Byron) suppression detection (Unit 1) Nylon and acrylic Zone 27) detection Zone 10 plastic Braidwood: Fenwal (Byron) thermal detection 10.1-2 Manual Fluoro Byron: Fenwal #2 fuel oil, High (Braidwood)

Diesel fuel protein foam rate compensating gaskets, flex High (Byron) oil storage extinguishing detectors connections, grease, room 2B system via spray ionization (or polypropylene nozzles (Unit 2 photoelectric) (Byron) suppression detection (Unit 2) Nylon and acrylic Zone 27) detection Zone 10 plastic Braidwood: Fenwal (Byron) thermal detection 10.2-1 Manual Fluoro Bryon: Fenwal #2 fuel oil, High (Braidwood)

Diesel fuel protein foam rate compensating gaskets, flex High (Byron) oil storage extinguishing detectors connections, grease, room 1A system via spray ionization (or polypropylene nozzles (Unit 1 photoelectric) (Byron) suppression detection (Unit 1) Nylon and acrylic Zone 28) detection Zone 10 plastic Braidwood: Fenwal (Byron) thermal detection 10.2-2 Manual Fluoro Byron: Fenwal #2 fuel oil, High (Braidwood)

Diesel fuel protein foam rate compensating gaskets, flex High (Byron) oil storage extinguishing detectors connections, grease, room 2A system via spray ionization (or polypropylene nozzles (Unit 2 photoelectric) (Byron) suppression detection (Unit 2) Nylon and acrylic Zone 28) detection Zone 10 plastic Braidwood: Fenwal (Byron) thermal detection 11.1A-0 Unit 1 Note 1 Ionization(or lube oil, gaskets, Low (Byron) auxiliary building photoelectric) grease, cable Low (Braidwood) basement detection (Unit 2 insulation, Thermo-(330 feet-0 inch) detection Zone 11) Lag (Byron),

polypropylene, Polycarbonate Plastic (Braidwood),

Lead shielding blanket covers (Braidwood) 11.1B-0 Unit 2 Note 1 Ionization (or lube oil, gaskets, Low auxiliary building photoelectric) grease, lb cable basement detection (Unit 2 insulation, (330 feet-0 inch) detection Zone 11) polypropylene Nylon and acrylic plastic, Polycarbonate Plastic (Braidwood),

Lead shielding (Byron) 2.2-27

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.2-0 Auxiliary Note 1 Ionization (or lube oil Low (Byron) building general Automatic photoelectric) gaskets, Low (Braidwood) area, elevation Sprinkler Stairway detection (Unit 2 cable insulation and 346 feet-0 inch (Unit 2 detection Zones 17 Thermo-Lag, cable Suppression and 40) insulation for SFP Zone54) temporary power cable storage (Byron) 55 gal lube oil transient load, Miscellaneous combustibles totaling 128 x 106 Btu, Rubber and cable insulation associated with the decontamination machine, plastics, rubber, and storage of cloth towels in the decontamination enclosure, (Byron),

flammable liquid storage cabinets holding lube oil and paint and paint thinner, polytubes (Byron), lead shielding blanket covers -

(Braidwood), plastic associated with Clarke floor scrubbers (Byron)

Polypropylene/nylon and acrylic plastic (Byron)

Contents of portable work enclosure equivalent to 5.9 pounds of Class A combustibles per square foot of enclosure floor area (Braidwood), lead shielding (Byron),

Polycarbonate plastic (Braidwood) 11.2A-1 Note 1 Ionization (or grease, gaskets, Low Residual heat photoelectric) lube oil, cable removal pump 1A detection (Unit 1 insulation room detection Zone 21) Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood),

Lead shielding blanket covers (Braidwood) 11.2A-2 Note 1 Ionization (or 1 lb grease, Low (Byron)

Residual heat photoelectric) gaskets, lube oil, Low (Braidwood) removal pump 2A detection (Unit 2 cable insulation, room detection Zone 21) lead shielding blanket covers -

(Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.2B-1 Note 1 Ionization (or lube oil, cable Low (Byron)

Containment photoelectric) insulation, grease, Low (Braidwood)

spray pump 1A detection (Unit 1 gaskets, . of lead room detection Zone 21) shielding (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 2.2-28

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.2B-2 Note 1 Ionization (or lube oil, cable Low (Byron)

Containment photoelectric) insulation, grease, Low (Braidwood) spray pump 2A detection (Unit 2 gaskets, lead room detection Zone 21) shielding blanket covers - (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.2C-1 Note 1 Ionization (or lube oil, cable Low (Byron)

Containment spray photoelectric) insulation, grease, Low (Braidwood) pump 1B room detection (Unit 1 gaskets, Lead detection Zone 20) shielding covers (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.2C-2 Note 1 Ionization (or lube oil, cable Low (Byron)

Containment spray photoelectric) insulation, grease, Low (Braidwood) pump 2B room detection (Unit 2 gaskets, lead detection Zone 20) shielding blanket covers - (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.2D-1 Note 1 Ionization (or lube oil, grease, Negligible (Byron)

Residual heat photoelectric) gaskets, lead Low (Braidwood) removal pump 1B detection (Unit 1 shielding covers room detection Zone 20) (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.2D-2 Note 1 Ionization (or lube oil, grease, Negligible (Byron)

Residual heat photoelectric) gaskets, lead Low (Braidwood) removal pump 2B detection (Unit 2 shielding blanket room detection Zone 20) covers - (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood)

2.2-28a B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.3-0 Auxiliary Note 1 Ionization (or Gaskets, Low (Byron) building, general Automatic photoelectric) lube oil, Low (Braidwood) area, elevation sprinkler detection 55 gal drum lube 364 feet-0 inch (Unit 1 suppressi (Unit 1 detection oil transient on Zone 59) Zones 17 and 40) load, cable Stairway and Open insulation and Hatch Thermo-Lag, (Unit 2 suppressi Miscellaneous on Zone 54) combustibles totaling 51.2 x 106 Btu At Byron, fiber optic cable, flammable liquid storage cabinet holding up to 12 gal lube oil, polytubes (Byron),

Contents of portable work enclosure equivalent to 5.9 pounds of Class A combustibles per square foot of enclosure floor area Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 2.2-28b

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Contd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.3-1 Unit 1 Note 1 Ionization (or cable insulation, Low (Byron) containment pipe Automatic photoelectric) Thermo-Lag 55 gal Low(Braidwood) penetration area sprinkler (Unit 1 detection (Unit 1 lube oil transient suppression detection Zone 18) load, lube oil, Zone 60) gaskets, polyethylene (Braidwood) lead shielding blanket covers (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron), hydraulic fluid (Byron),

Polycarbonate plastic (Braidwood) 11.3-2 Unit 2 Note 1 Ionization (or cable insulation, Low (Byron) containment pipe Automatic photoelectric) 55 gal lube oil Low (Braidwood) penetration area sprinkler (Unit 2 detection (Unit 2 transient load, suppression detection Zone 18) lube oil, gaskets, Zone 53) Thermo-Lag (Byron),

polyethylene (Braidwood) lead shielding blanket covers (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron), hydraulic fluid (Byron),

Polycarbonate plastic (Braidwood) 11.3A-1 Note 1 Ionization(or lube oil, grease, Low Safety injection photoelectric) gaskets pump 1A room detection (Unit 1 Polypropylene/nylon detection Zone 18) and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.3A-2 Note 1 Ionization (or lube oil, grease, low Safety injection photoelectric) gaskets pump 2A room detection (Unit 2 Polypropylene/nylon detection Zone 18) and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.3B-1 Note 1 None Gaskets, cable Negligible Residual heat insulation (Byron) removal heat Polypropylene/nylon exchanger 1A room (Byron) 11.3B-2 Note 1 None Gaskets, cable Negligible Residual heat insulation (Byron) removal heat Polypropylene/nylon exchanger 2A room (Byron) 11.3C-1 Unit 1 Note 1 Ionization (or gaskets, Low positive photoelectric) grease, displacement detection (Unit 1 lube oil charging pump room detection Zone 19) Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.3C-2 Unit 2 Note 1 Ionization (or gaskets, grease, Low (Byron) positive photoelectric) lube oil, lead Low (Braidwood) displacement detection (Unit 2 shielding covers

charging pump room detection Zone 19) (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 2.2-29

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.3D-1 Note 1 Ionization (or gaskets, grease, Low Centrifugal photoelectric) lube oil, charging pump detection (Unit 1 Polypropylene/nylon 1A room detection Zone 19) and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.3D-2 Note 1 Ionization (or gaskets, grease, Low (Byron)

Centrifugal photoelectric) lube oil, rubber Low (Braidwood) charging pump detection (Unit 2 (BR) 2A room detection Zone 19) Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.3E-1 Note 1 None Gaskets, Negligible Residual heat Polypropylene/nylon removal heat (Byron) exchanger 1B room 2.2-29a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.3E-2 Note 1 None Gaskets Negligible Residual heat Polypropylene/nylon removal heat (Byron) exchanger 2B room 11.3F-1 Note 1 Ionization (or lube oil, grease, Negligible Safety injection photoelectric) gaskets pump 1B room detection (Unit 1 Polypropylene/nylon detection Zone 16) and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.3F-2 Note 1 Ionization (or lube oil, grease, Negligible Safety injection photoelectric) gaskets pump 2B room detection (Unit 2 Polypropylene/nylon detection Zone 16) and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.3G-1 Note 1 Ionization (or lube oil, gaskets, Low (Braidwood)

Centrifugal photoelectric) grease rubber Low (Byron) charging pump detection (Unit 1 hose, 1B room detection Zone 16) Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.3G-2 Note 1 Ionization (or lube oil, gaskets, Low (Braidwood)

Centrifugal photoelectric) grease rubber Low (Byron) charging pump detection (Unit 2 hose, 2B room detection Zone 16) Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.4-0 Auxiliary Automatic Ionization (or gaskets,220 gal Low (Byron) building, general sprinkler stairway photoelectric) lube oil transient Low (Braidwood) area, elevation and open hatch detection load, cable 383 feet-0 inch (Unit 2 (Unit 1 detection insulation and suppression Zones 11 & 12) Thermo-Lag, Zone 54) polytubes (Byron) ductwork insulation, lube oil, grease, paper, etc.,

Miscellaneous combustibles totaling 18.8 x 106 Btu at Byron, fiber optic cable and diesel fuel oil, lead shielding covers (Braidwood),

Nylon (Byron),

FRP (Byron),

waste oil and solvents (Byron)

Polypropylene/nylon and acrylic plastic (Byron)

Rubber and plastic (Byron),

Polycarbonate plastic (Braidwood) 11.4A-0 Note 1 Ionization (or lube oil, gaskets, Low (Byron)

Control room photoelectric) grease, cable Low (Braidwood)

Refrigeration detection (Unit 1 insulation Equipment room detection Zone 29) (Byron),

polypropylene (Byron)

Polypropylene/nylon and acrylic plastic (Byron) 2.2-30

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.4A-1 Unit 1 Automatic total Byron: Fenwal grease, gaskets, Moderate (Byron) auxiliary flooding CO2 system thermal ionization diesel fuel oil, Moderate (Braidwood) feedwater pump (Unit 1 (or photoelectric) lube oil, diesel room suppression Zones detection (Unit 1 polypropylene, 41 and 42) detection Zone 12) 55 gal lube oil Braidwood: Fenwal transient load, thermal detection cable (Braidwood),

Polycarbonate (Braidwood)

Nylon and acrylic plastic (Byron) 2.2-30a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.4A-2 Unit 2 Automatic total Byron: Fenwal grease, gaskets, Moderate (Byron) auxiliary flooding CO2 system thermal ionization diesel fuel oil, Moderate (Braidwood) feedwater pump (Unit 2 d(or lube oil, diesel room suppression Zones photoelectric) polypropylene, 41 and 42) etection (Unit 1 55 gal lube oil detection Zone 12) transient load, Braidwood: Fenwal cable (Braidwood),

thermal detection Polycarbonate (Braidwood)

Nylon and acrylic plastic (Byron) 11.4B-0 Radwaste Note 1 None gaskets, flexible Low (Braidwood) and remote connections, duct Low (Byron) shutdown panel insulation, ventilation filter, lube oil, control room grease, cable insulation, polypropylene, acrylic plastic 11.4B-1 Unit 1 Note 1 None gaskets Negligible seal water heat exchanger room 11.4B-2 Unit 2 Note 1 None gaskets Negligible seal water heat exchanger room 11.4C-0 Note 1 Ionization (or gaskets, ductwork Low (Byron)

Radwaste and photoelectric) insulation, cable Low (Braidwood) remote shutdown detection (Unit 1 insulation, fiber control room detection Zone 13) optic cable, 5.9 LB/FT2 Office combustibles (Byron)

Braidwood:

Plastic, wood, paper acrylic plastic (Byron)

Nylon (Byron),

Polypropylene (Byron) 11.4C-1 Note 1 None gaskets Negligible Letdown heat exchanger 1A room 11.4C-2 Note 1 None gaskets Negligible Letdown heat exchanger 2A room 11.4D-1 Note 1 None gaskets Negligible Letdown heat exchanger 1B room 11.4D-2 Note 1 None gaskets Negligible Letdown heat exchanger 2B room 2.2-31

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.5-0 Auxiliary Automatic Ionization (or cable insulation Low (Byron) building elevation sprinkler stairway photoelectric) and Thermo-Lag, Low (Braidwood) 401 feet-0 inch and open hatch detection (Unit 1 gaskets, duct (Unit 2 detection Zone 8) insulation, lube suppression oil, grease, 110 Zone 54) Aux. gal lube oil bldg. waste oil transient load, drain tank (Unit 1 Miscellaneous suppression combustibles Zone 57) totaling 22.2 x 106 Btu (Byron) and 14.006 x 103 (Braidwood), At Byron, storage for Anti-C clothing and fiber optic cable, PVC conveyor belt, compressed gas cylinders containing hydrogen.

At Braidwood, storage for Anti-C clothing, compressed gas cylinders containing methane and compressed gas cylinders containing of hydrogen. At Byron, flammable liquid storage cabinets holding lube oil, 10 P10 gas cylinder with methane and polytubes At Braidwood, 8 P-10 gas cylinders with methane and polytubes at Byron, staged boric acid containers (wood, paper, polyethylene),

lead shielding blanket covers -

(Braidwood)

Contents of Radiation Protection Office equivalent to 5.9 pounds of Class A combustibles per square foot of enclosure floor area (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron)

At Braidwood, permanently routed EPDM hoses for Boric Acid mixing skid.

Polycarbonate plastic (Braidwood)

2.2-31a B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.5-1 Unit 1 Note 1 Ionization (or lube oil, gaskets, Low (Byron) containment photoelectric) 55 gal lube oil Low (Braidwood) refrigeration detection (Unit 1 transient load, equipment room detection Zone 9) grease, Miscellaneous combustibles totaling 2 x 106 Btu, plastic (Byron),

polypropylene (Byron), cable insulation (Byron) nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.5-2 Unit 2 Note 1 Ionization (or HEPA filters, Low (Braidwood) containment photoelectric) prefilters, Low (Byron) refrigeration detection (Unit 2 gaskets, lube oil, equipment room detection Zone 9) 55 gal lube oil transient load, grease, Miscellaneous combustibles totaling 8.53 x 106 Btu, polypropylene (Byron), cable insulation (Byron) nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.5A-0 Radio- Note 1 Ionization (or plastic, rubber, Low (Byron) logical Instrument photoelectric) gaskets, rope, Low (Braidwood)

Calibration Room detection (Unit 2 cable insulation, detection Zone 9) cotton, flammable liquid storage cabinet (Byron),

plastic (Braidwood)

(Zinc skid),

Polypropylene (Braidwood)

2.2-31b B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.5A-1 Note 1 Ionization (or (Braidwood) cable Low (Byron)

Division 11 photoelectric) insulation, Low (Braidwood)

Cable penetration detection (Unit 1 gaskets, Thermo-area detection Zone 24) Lag (Byron)

Flame retardant polycarbonate, Styrofoam battery spacers, build-a-berm barrier, and vinyl cement sealant 11.5A-2 Note 1 Ionization d(or gaskets, cable Low (Byron)

Division 21 photoelectric) insulation Low (Braidwood) cable penetration etection (Unit 2 area detection Zone 24) 11.5B-1 Division Note 1 Ionization (or cable insulation Low (Byron) 12 Cable Riser photoelectric) Low (Braidwood)

Area detection (Unit 1 detection Zone 24) 11.5B-2 Division Note 1 Ionization (or cable insulation Low (Byron) 22 Cable Riser photoelectric) Low (Braidwood)

Area detection (Unit 2 detection Zone 24) 11.6-0 Auxiliary Automatic Ionization (or cable insulation, Low (Byron) building elevation sprinkler stairway photoelectric) gaskets, ductwork Low (Braidwood) 426 feet-0 inch to open hatch detection (Unit 2 insulation, (Unit 2 detection Zone 75) Thermal-Lag, suppression Zones clothing 54 and 55) (Braidwood),

55 gal lube oil transient load, Flame retardant polycarbonate, build-a-berm barrier, Styrofoam battery spacers and vinyl cement sealant, Miscellaneous combustibles totaling 28.1 x 106 Btu (Byron) and 21.15 x 106 Btu (Braidwood).

At Byron, fiber optic cable 5 P10 gas cylinder with methane (Byron)

At Braidwood, compressed gas cylinders containing methane.

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.6-1 Note 1 Ionization(or gaskets, cable Low (Byron)

Division 12 photoelectric) insulation, wood Low (Braidwood) electrical detection (Unit 1 shelving, penetration area detection Zone 76) Thermo-Lag (Braidwood),

Miscellaneous combustibles totaling 8.5 x 107 Btu (Byron),

Polycarbonate plastic (Braidwood)

2.2-32 B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.6-2 Note 1 Ionization (or gaskets, cable Low (Byron)

Division 22 photoelectric) insulation, nylon Low(Braidwood) electrical detection (Unit 2 strips, penetration area detection Zone 76) 5 electrical cords, rubber hose, Miscellaneous combustibles totaling 8.5 x 107 Btu (Byron),

fiberglass and miscellaneous office furniture (Byron),

Polycarbonate plastic (Braidwood) 11.6A-0 Note 1 Ionization (or flex connections, Low (Braidwood)

Laboratory photoelectric) lube oil, Low (Byron)

HVAC equipment detection (Unit 2 HEPA filters, room detection Zone 75) prefilters, silencers, gaskets, duct insulation, cable insulation, charcoal filter (Byron))

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.6A-1 Unit 1 Note 1 None Gaskets Negligible volume control Polypropylene/nylon tank room (Byron) 11.6A-2 Unit 2 Note 1 None Gaskets Negligible volume control Polypropylene/nylon tank room (Byron)

2.2-32a B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.6B-0 Auxiliary Note 1 None cable insulation, Low (Byron)

Building Offices 5.8 lb/ft2 office Low (Braidwood)

Elevation 426'-0" combustibles, of ductwork insulation, gaskets, 55 gal lube oil transient load, Miscellaneous combustibles totaling 1 x 106 Btu, At Braidwood, compressed gas cylinders, hydrogen and acetylene, flammable liquid cabinets, 4 P-10 gas cylinders with methane and polytubing, Polypropylene/nylon and acrylic plastic (Byron),

Polypropylene, hydrogen compressed gas cylinders (Byron) 11.6C-0 Auxiliary Note 1 Ionization (or cable insulation, Low Building Laundry photoelectric) of ductwork Room detection (Unit 2 insulation, Elevation 426'-0" detection Zone 75) gaskets, miscellaneous combustibles equivalent to 3 transient oil drums, Polypropylene (Byron) 11.6D-0 Auxiliary Note 1 Ionization (or cable insulation, Low (Byron)

Building Hot photoelectric) clothing, Low (Braidwood)

Showers, detection (Unit 1 ductwork Decontamination detection Zone 23) insulation, and Change Areas gaskets, Elevation 426'-0" 250 lb clothing transient load, plastic bins and rubber mask (Braidwood),

Polypropylene 11.6E-0 Auxiliary Note 1 Ionization (or cable insulation Low (By)

Building photoelectric)8det clothing (Byron), Low (Br)

Decontamination ection (Unit 1 ductwork Pad and Storage detection Zone 23) insulation, (Braidwood Tool gaskets, Room) 250 lb clothing Elevation 426'-0" transient load (Byron).

At Braidwood, plastic, rubber, nylon, and lube oil.

At Byron, flammable liquid storage cabinet 2.2-33

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 11.7-0 Auxiliary Manual charcoal Temperature switch prefilters, Moderate (Byron) building HVAC deluge system (in charcoal HEPA filters Moderate (Braidwood) exhaust complex (Unit 1 absorber) charcoal, lube suppression Zones Ionization (or oil, grease, 1, 2, 3 and 10; photoelectric) gaskets, duct Unit 2 suppression detection (Unit 2 insulation, cable Zones 1, 2, 3, 8, detection Zones insulation, 9, 10, 25, 26) 12, 22 and 62) Miscellaneous combustibles flammable liquid storage cabinet holding lube oil (Byron), Laptops (Braidwood),

Network switches (Braidwood),

CAT5E Cable (Braidwood)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 11.7-1 Unit 1 Manual charcoal Temperature switch charcoal, Low purge room deluge system (in charcoal lube oil, (Unit 1 absorber) gaskets, suppression Ionization (or prefilters, Zone 7) photoelectric) HEPA filters detection (Unit 1 Polypropylene/nylon detection Zone 25) and acrylic plastic (Byron) 11.7-2 Unit 2 Manual charcoal Temperature switch charcoal, Low purge room deluge system (in charcoal lube oil, (Unit 2 absorber) gaskets, suppression Ionization (or prefilters, Zone 7) photoelectric) HEPA filters detection (Unit 2 Polypropylene/nylon detection Zone 25) and acrylic plastic (Byron) 2.2-33a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 12.1-0 Note 1 Ionization (or lube oil, gaskets, Low (Byron)

Fuel handling photoelectric) duct insulation, Low (Braidwood) building detection (401'-0" and grease, 220 gal lube 426'-0" and Unit 1 oil transient load, detection Zone 39) wood floor (new fuel Ultraviolet detection area), cable (426'-0") (Unit 1 insulation , 206 lb.

detection Zone 38) EPDM rubber reactor cavity seal (Byron transient load), Anti-C clothing and a spare RCP motor with lube oil (Braidwood), spare RCP lube oil (Byron),

rubber hose (Braidwood), nylon FME barrier (Braidwood);

Overhead crane 10 lb grease, 89 gal lube oil, 2 gal hydraulic oil, 124 ft cable insulation, 200 ft of instrument cable insulation, epoxy floor coating,Dry Cask Storage grillage support assemblies (Fabreeka, Nylatron, rubber hoses, hydraulic oil, polyethylene, and polypropylene),

Polypropylene/nylon and acrylic plastic, polyester fabric (Braidwood), rubber tires, cable insulation, swing arm fall protection system (nylon and plastic)Note: One 300 ft2 sheet of Polypropylene (48lbs) may be replaced with four polyvinyl chloride (PVC) sponge mats, which have a total weight of 16 lbs. (Byron),

Polycarbonate Plastic (Braidwood) 13.0 QA Automatic total Ionization (or paper, 55-gal lube oil High Vault flooding Halon photoelectric) transient load, 1301 system detection (Unit 1 gaskets, insulation (Unit 1 detection Zones 61 and suppression 62)

Zone 53) 14.1-0 Note 1 None gal lube oil, gaskets, Low (Braidwood)

Radwaste drumming grease, 55 gal lube Low (Byron) station and tunnel oil transient load, cable insulation, dry active waste bags, polypropylene, misc.

combustibles (Braidwood), acrylic plastic (Braidwood),

Polycarbonate plastic (Braidwood) 2.2-34

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 14.2-0 Note 1 None lube oil, Negligible Radwaste gaskets, (Braidwood) evaporator monitor grease, polypropylene Low (Byron) tank room and (Byron) spent resin pump room 14.3-0 Note 1 None lube oil, cable Surface condenser insulation, flammable rooms liquid storage Low (Byron) cabinets (Byron), Low (Braidwood) polypropylene (Byron),

55 gal lube oil transient load (Byron), grease, (Braidwood) solvent (Braidwood) cotton rags (Braidwood),

Polycarbonate plastic (Braidwood) 14.4-0 Note 1 None gaskets, Low (Byron)

Spent resin compressed gas Low (Braidwood) storage tank cylinders concentrates containing holding tank, and hydrogen, (Byron) waste gas compressor rooms 14.5-0 Note 1 None gaskets, lube oil, Low Radwaste grease, cable evaporator rooms insulation 14.6-0 Partial coverage Temperature switch lube oil, 220 gal Low (Byron)

Radwaste building, automatic (in charcoal lube oil transient Low (Braidwood) ground floor sprinkler system; absorber) load, grease, Manual charcoal Ionization (or gaskets, duct deluge system photoelectric) insulation, dry (Unit 1 detection (Unit 1 active waste, suppression Zones detection Zone 63) polymer resin, 32 and 58) promotor, Note 1 catalyst, cable,P10 gas cylinders with methane at Byron, insulation, charcoal, Miscellaneous combustibles totaling 90 x 106 Btu, Caustic (Braidwood), Resin (Braidwood)

Acrylic Plastic (Byron)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood)

2.2-34a B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 16.1-1 Note 1 None None Negligible Refueling water storage tank #1 16.1-2 Note 1 None None Negligible Refueling water storage tank #2 17.1-0 Open Note 1 None None Negligible Flume (Byron) 17.1-1 Byron Note 1 None PVC, polypropylene, Moderate Cooling tower #1 nylon, ABS, rubber, FRP, neoprene 17.1-2 Byron Note 1 None Same as Zone 17.1-1 Moderate Cooling tower #2 17.2-1 Byron Note 1 None lube oil, Low Unit 1 ESW cable insulation, Cooling tower grease, fiberglass reinforced plastic Acrylic plastic (Byron) 17.2-2 Byron Note 1 None lube oil, Low Unit 2 ESW grease, Cooling tower cable insulation, fiberglass reinforced plastic Acrylic plastic (Byron) 18.1-1 Diesel- Note 1 Ionization (or grease, Low generator 1B and photoelectric) flexible connections, switchgear room detection in prefilters, gaskets, air shaft supply air duct cable insulation 18.1-2 Diesel- Note 1 Ionization (or grease, Low generator 2B and photoelectric) flexible connections, switchgear room detection in prefilters, gaskets air shaft supply air duct 18.2-1 Diesel- Note 1 Ionization (or grease, Low (Byron) generator 1A and photoelectric) flexible connections, Low (Braidwood) switchgear room detection in prefilters, gaskets, air shaft supply air duct cable insulation (Braidwood) 18.2-2 Diesel- Note 1 Ionization (or grease, Low generator 2A and photoelectric) flexible connections, switchgear room detection in prefilters, gaskets, air shaft supply air duct cable insulation 18.3-1 Unit 1 Note 1 Ionization (or Fyrquel foam Low main steam and photoelectric) insulation Low auxiliary feed- detection in (Byron/Braidwood water pipe tunnel safety valve enclosures),

enclosures polypropylene (Unit 1 detection Nylon and acrylic Zones 14 and 15) plastic (Byron) 2.2-35

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.3-2 Unit 2 Note 1 Ionization (or Low main steam and photoelectric) Fyrquel,(Byron/Braid auxiliary feed- detection in safety wood enclosures),

water pipe valve enclosures polypropylene tunnel (Unit 2 detection (Byron tunnel), foam Zones 14 and 15) insulation (Braidwood enclosures)

Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 18.4-1 Control Note 1 Temperature switch grease, flexible Moderate (Byron) room HVAC Charcoal filter (in charcoal connections, duct Moderate (Braidwood) equipment room, deluge system absorber) insulation, filter Train A (Unit 1 Ionization (or modules, charcoal, suppression Zone photoelectric) gaskets, cable

4) detection (Unit 1 insulation, detection Zone 68) hydraulic fluid (Braidwood), 55 gal lube oil transient load Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 18.4-2 Control Note 1 Temperature switch grease, flexible Low room HVAC Charcoal filter (in charcoal connections, duct equipment room, deluge system absorber) Ionization insulation, filter Train B (Unit 2 (or photoelectric) modules, charcoal, suppression Zone detection (Unit 2 gaskets, 55 gal lube

4) detection Zone 68) oil transient load.

At Braidwood, hydraulic fluid, cable insulation Polypropylene/nylon and acrylic plastic (Byron),

Polycarbonate plastic (Braidwood) 18.5-1 Note 1 None duct insulation, Low (Byron)

Locker Room Area gaskets, lube oil, Low (Braidwood)

(Byron) cloth and paper Kitchen/Locker products, transient Area (Braidwood) load of 250 lb of cloth and 20 lb of toilet paper, Miscellaneous combustibles totaling 2 x 106 Btu, a wooden vanity cabinet and wooden benches (Byron),

Polypropylene 18.5-2 Note 1 Ionization (or duct insulation, Low Security control photoelectric) gaskets, lube oil, center detection (Unit 2 paper products, detection Zone 69) clothing and electronic equipment totaling 8.53 x 106 Btu, transient load of 250 lb of cloth and paper products, fiber optic cable, Polypropylene

2.2-36 B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.6-0 Service Note 4 Note 4 Note 4 Note 4 building ground floor 2.2-36a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.7-0 Service Note 4 Note 4 Note 4 Note 4 building second floor 18.8-0 Service Note 4 Note 4 Note 4 Note 4 building third floor 18.9-0 Service Note 4 Note 4 Note 4 Note 4 building fourth floor 18.10A-1 Main Deluge spray Thermistor wire 22,138 gal High transformer 1E system electrical (Unit 1 detection transformer oil interlocks (Unit 1 Zone 30)

Zone 14) 18.10A-2 Main Deluge spray Thermistor wire 20,413 gal 1,810,486 transformer 2E system electrical (Unit 2 detection (Braidwood) (Braidwood) interlocks (Unit 2 Zone 30) 12,360 gal High (Byron)

Zone 14) transformer oil (Byron) Cable Insulation (Braidwood) 18.10B-1 Main Deluge spray Thermistor wire 22,138 gal High power transformer system electrical (Unit 1 detection transformer oil 1W interlocks (Unit 1 Zone 31)

Zone 13) 18.10B-2 Main Deluge spray Thermistor wire 20,413 gal 1,810,486 power transformer system electrical (Unit 2 detection (Braidwood) (Braidwood) 2W interlocks (Unit 2 Zone 31) 12,360 gal High (Byron)

Zone 13) transformer oil (Byron) Cable Insulation (Braidwood) 18.10C-1 Unit Deluge spray Thermistor wire 5173 gal 776,000 auxiliary trans- system electrical (Unit 1 detection transformer oil former 141-1 interlocks (Unit 1 Zone 32)

Zone 15) 2.2-37

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.10C-2 Unit Deluge spray Thermistor wire 5173 gal 776,000 auxiliary trans- system electrical (Unit 2 detection transformer oil former 241-1 interlocks (Unit 2 Zone 32)

Zone 15) 18.10D-1 Unit Deluge spray Thermistor wire 5173 gal 776,000 auxiliary trans- system electrical (Unit 1 detection transformer oil former 141-2 interlocks (Unit 1 Zone 33)

Zone 16) 2.2-37a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.10D-2 Unit Deluge spray Thermistor wire 5173 gal High auxiliary system electrical (Unit 2 detection transformer oil transformer 241-2 interlocks (Unit 2 Zone 33)

Zone 16) 18.10E-1 System Deluge spray Thermistor wire 10,900 gal High auxiliary trans- system electrical (Unit 1 detection transformer oil formers 142-1 and interlocks (Unit 1 Zones 34 & 35) 142-2 Zones 17 & 18) 18.10E-2 System Deluge spray Thermistor wire 10,900 gal High auxiliary trans- system electrical (Unit 2 detection transformer oil formers 242-1 and interlocks (Unit 2 Zones 34 & 35) 242-2 Zones 17 & 18) 18.11-0 River Byron - partial Byron: Ionization Byron - coaxial Low (Byron) screen houses low pressure local (or photoelectric) cable, Low (Braidwood) application CO2 detection (Unit 1 Both Stations -

system (Unit 1 detection Zone 79) Polypropylene Zone 52) - Note 1 Rate compensated Both Stations -

with CO2 system cable insulation, Braidwood - Note 1 Braidwood: lube oil, grease, Ionization gaskets 110 gal detection; lube oil transient Ultraviolet load, detection acrylic plastic (Unit 1 detection (battery casing),

Zone 79) acrylic plastic nylon (Byron),

Polycarbonate plastic (Braidwood) 18.11-1 Byron Total flooding CO2 Rate compensated diesel oil, High river screenhouse system detectors cable insulation, diesel oil storage Ionization (or PVC tank room B photoelectric) detection (Unit 1 detection Zone 79) 18.11-2 Byron Total flooding CO2 Rate compensated diesel oil, cable High river screenhouse system detectors insulation, PVC diesel oil storage Ionization (or tank room A photoelectric) detection (Unit 1 detection Zone 79) 18.12-0 Note 1 Ionization (or Braidwood - PVC Low (Byron)

Circulating water photoelectric) (and/or CPVC and Low (Braidwood) pump house (Byron) and U.V. detection PVDF),

Lake screen house (Unit 1 detection Both stations -

(Braidwood) Zone 22) lube oil, 450 gal Byron ionization lube oil transient (or photoelectric) load, grease, and U.V. detection polypropylene, (Unit 1 detection cable insulation, Zone 22) Braidwood gaskets, acrylic plastic nylon (Byron),

Polycarbonate plastic (Braidwood)

2.2-38 B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.13-0 Diesel Automatic Ionization (or fuel oil, High (Byron) driven fire pump sprinkler system photoelectric) lube oil, grease, High (Braidwood) cubicles (Unit 1 Zone 25) detection (Unit 1 polypropylene, detection Zone 22) 55 gal lube oil Byron only transient load Nylon and acrylic plastic (Byron) 2.2-38a

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.14A-1 ESW Cooling Note 1 Ionization (or cable insulation, Low tower electrical photoelectric) gaskets, filter substation 0B; detection (Unit 1 modules, lube oil Div 12 (Byron only) detection Zone 26) acrylic plastic (Byron) 18.14A-2 ESW Cooling Note 1 Ionization (or cable insulation, Low tower electrical photoelectric) gaskets, filter substation 0B, detection (Unit 1 modules, 1.5 gal lube Div 22 (Byron only) detection Zone 26) oil acrylic plastic (Byron) 18.14B-1 ESW Cooling Note 1 Ionization (or cable insulation, Low tower electrical photoelectric) gaskets, filter substation 0A; detection (Unit 1 modules, lube oil Div 11 (Byron only) detection Zone 26) acrylic plastic (Byron) 18.14B-2 ESW Cooling Note 1 Ionization (or cable insulation, Low tower electrical photoelectric) gaskets, filter substation 0A, detection (Unit 1 modules, lube oil Div 21 (Byron only) detection Zone 26) acrylic plastic (Byron) 18.15-0 Makeup Note 1 None lube oil, prefilter Low demineralizer modules 55 gal lube building (Braidwood) oil transient load, gaskets, MUDS flammable liquid cabinet containing 25.6 x 106 Btu, Polypropylene acrylic plastic, water treatment materials (granular activated carbon, rubber, polyethylene, PVC, PPE, PVDF), hydrazine, Polycarbonate plastic (Braidwood) 18.16-1 Sulfuric Dikes None None Negligible acid tank #1 (Byron only) 18.16-2 Sulfuric Dikes None None Negligible acid tank #2 (Byron only) 18.17-0 Note None Hydrogen polypropylene Not meaningful Hydrogen/Nitrogen (Byron) storage area 18.19-0 Sodium Dikes None None Negligible hypochlorite tank (Byron) 18.20-0 125,000 and Dikes None diesel fuel oil, High (Braidwood) 50,000 gallon fuel polypropylene (Byron) High (Byron) oil storage tanks 18.22-0 Makeup Note 1 None lube oil, gaskets, Low (Byron) demineralizer 10 gal lube oil building (Byron) transient load, cable insulation, grease, Polypropylene/nylon and acrylic plastic, rubber, polyethylene 18.23-0 Condensate Note 1 None None Negligible storage tanks 2.2-39

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.24-0 Turbine Note 1 None cable insulation, Low (Braidwood)

Building sampling gaskets, flammable Low (Byron) room liquid cabinets, tarp making cage with m/c, Polypropylene, acrylic plastic nylon (Byron),

Polycarbonate plastic (Braidwood) 18.25-1 Primary Note 1 None None Negligible water storage tank #1 18.25-2 Primary Note 1 None None Negligible water storage tank #2 18.26-0 Manual charcoal Temperature switch lube oil, paper, Low (Byron)

TSC/Condensate deluge system; (in charcoal grease, 55 gal Low (Braidwood) cleanup building (Unit 2 absorber) transient lube oil, suppression cable insulation Zone 57) gaskets, duct insulation, charcoal, Polypropylene, fiber optic cable (Byron),

acrylic plastic Nylon (Byron),

Polycarbonate plastic (Braidwood) 18.27-0 Level B Note 1 None Paint, paint thinner High storage building (Byron) 18.27-0 Bottle Note 1 None propane bottles, Low storage enclosure gaskets, 250 SCF (Braidwood) bottles, methane methane/argon 18.28-0 Waste Note 1. Also, None oil, cable Low (Byron) treatment building waste oil tank has insulation, plastic, Low (Braidwood) overhead sprinkler neoprene, grease, (Unit 2 PVC, HDPE piping Suppression (Braidwood)

Zone 52) Polypropylene, acrylic plastic nylon (Byron),

Polycarbonate plastic (Braidwood) 18.29-0 Fire hydrants None diesel fuel, , 55 gal Negligible Aboveground transient lube oil, vehicle fuel gasoline dispensing areas 2.2-40

B/B AMENDMENT 28 DECEMBER 2018 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.30-0 New and Fire hydrants None 26125 gal new oil, High/

used oil storage 5500 gal used oil High pads 18.31-0 Acid pump Fire hydrants None Grease Negligible house (Byron) Polypropylene/nylon and acrylic plastic (Byron) 18.32-0 Receiving Note 1. None lube oil Moderate (Byron) building and Automatic transient load Low (Braidwood) warehouse sprinkler system gaskets, and fire hydrants duct insulation, (Unit 1 cable insulation Suppression (Braidwood), paper Zone 30) and files (Byron),

general office area combustibles (Byron),

warehouse storage combustibles (Byron) cable insulation (Byron) 18.33-0 Gatehouse NOTE 4 Note 4 NOTE 4 NOTE 4)

Polypropylene/nylon and acrylic plastic (Byron) 18.34-0 Welding Fire hydrants None acetylene - High gas storage bottles, propane -

building bottles, MAPP -

bottles 18.35-0 Security Note 1 Ionization (or cable insulation, Low diesel MCC photoelectric) Carbonate plastic detection (Unit 2 (Braidwood) detection Zone 26) 18.36-0 Relay None Ionization (or Miscellaneous Low house photoelectric) combustibles detection (Unit 1 totaling 8.53 x 106 detection Zone 80) Btu Cable insulation (Byron),

Acrylic plastic (Byron) 18.37-0 None None Miscellaneous Low Maintenance combustibles building totaling 8.53 x 106 Btu 18.38-0 IDNS Fire hydrants Ionization(or Moderate fire hazard building photoelectric) detection 2.2-41

AMENDMENT 28 DECEMBER 2018 FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2) 18.40-0 Braidwood Automatic In-duct ionization N/A Moderate fire hazard Electrical and Sprinkler (or photoelectric)

Instrument smoke detection Maintenance (EM/IM) shop building 18.41-0 Unit 1 Automatic Pre- Heat Detector N/A Moderate fire hazard Containment Access Action Sprinkler Facility 18.42-0 Unit 2 Automatic Pre- Heat Detector N/A Moderate Fire Hazard Containment Access Action Sprinkler Facility 18.43-0 Braidwood Fire Hydrants None HDPE liner, ; tank Low Btu/sq.ft.

Radwaste Storage insulating foam, ;

Tank Bermed Wall HDPE tank, Area Note 1: All fire zones are protected by manual extinguishing equipment. This includes manual hose stations (except Byron and Braidwood river screen house) and portable fire extinguishers. See the figures listed on Table 2.2-2 for each zone, for the planned location for each piece of equipment.

Note 2: An automatic deluge system is provided for the turbine oil storage tanks (Fire Zones 8.3-1 and 8.3-2), the hydrogen seal oil units (Fire Zones 8.5-1 and 8.5-2), and the turbine oil bearings (Fire Zone 8.6-0). Fire detectors used for these hazards are Fenwal Rate Compensated detectors.

2.2.41a

B/B AMENDMENT 28 DECEMBER 201 TABLE 2.2-3 (Cont'd)

FIRE AREA/ZONE FIRE LOAD DESIGN NUMBER AND NAME FIRE PROTECTION FIRE DETECTION COMBUSTIBLE FIRE (Btu/ft2)

Note 3: The ionization (or photoelectric) and Fenwal thermal detectors are cross zoned to require both an ionization (or photoelectric) and a heat detection of a fire to actuate the automatic fire suppression system. Each detection zone provides an independent alarm of a fire (or detector trouble) to the main control room. The circuits are designed that if either of the circuits has a break or a ground fault in one of the signalling line circuits, the remaining detection circuit could then automatically actuate the fire suppression system if a fire was present.

Note 4: The fire zone does not contain safety-related components or radioactive materials. The fire hazards in the zone are adequately protected and separated from areas that do contain safety-related components or radioactive materials. Therefore, descriptions of the fire protection, fire detection, combustible materials, and fire load associated with the zone are not provided.

2.2-42

B/B AMENDMENT 23 DECEMBER 2008 2.3 FIRE AREA ANALYSIS 2.3.1 Containment Buildings Each primary containment has been divided into three zones for the fire area analysis. The following material applies to the entire exterior containment structure.

Each primary Containment Building is a closed concrete cylinder with structural reinforced base slab, walls, and domed roof slab. These elements vary in thickness from 42 inches for the roof to 144 inches for the base slab. The roof slab and walls have been post-tensioned by means of steel tendons. The inside face of the entire building is lined with a 1/4-inch-thick steel plate liner.

Access to the Containment Building is through a 124-inch-diameter steel "personnel" air lock (which leads to a weathertight, 3-hour fire rated enclosure of 36-inch-thick structural reinforced concrete walls, roof, and floor on the exterior of the building at elevation 401 feet-0 inch). There is a blast resistant vestibule, which is constructed of a steel shell filled with concrete, connected to the Emergency Airlock exit. The vestibule has a minimum thickness of 10.5 inches and contains a non-listed blast resistant door that provides a level of fire protection equivalent to a UL Label A fire door. The vestibule assembly provides a 3-hour fire resistance. Normal access is through a 225-inch-diameter steel "equipment" air lock (which leads to the Fuel Handling Building at elevation 426 feet 0 inch). Both air locks are provided with airtight, removable covers of steel plate.

2.3.1.1 Unit 1 Containment Missile Shield Area (Fire Zone 1.1-1)

This zone is shown on Figures 2.3-10 (Sheet 1), 2.3-12 (Sheet 1), 2.3-13 (Sheet 1), and 2.3-15. It is shown in elevation on Figure 2.3-26 (Sheet 1).

Electrical cable trays routed through this zone are shown on Figures 2.3-36 (Sheet 1), 2.3-37 (Sheet 1), and 2.3-38 (Sheet 1).

Fire Barrier Description A structural reinforced concrete cylinder with an inside diameter of 21 feet 0 inch and walls 108 inches thick surrounds the reactor cavity from elevation 348 feet 0 inch up to elevation 377 feet 0 inch. The structural reinforced concrete slab below this cylinder, which is the base slab of the Containment Building, is 39 feet 0 inch in diameter, and 108 inches thick. Access to the steam generator area at elevation 377 feet 0 inch from the reactor cavity is through a tunnel. The tunnel walls are structural reinforced concrete 36 inches thick. Both the tunnel and reactor cavity are provided with a 1/4-inch-thick steel liner plate. This tunnel is open to the steam generator area.

Over the structural concrete described above are placed 24-inch-thick (reactor cavity walls), 30-inch-thick (reactor cavity and tunnel floor), and 24-inch-thick (tunnel walls) structural reinforced concrete topping.

From elevation 377 feet 0 inch to elevation 389 feet 6 inches, a structural reinforced concrete cylinder with an inside diameter of 17 feet 1 inch and walls 101 inches thick surrounds the reactor cavity.

2.3-1