A - NUCLEAR STEAM SUPPLY SYSTEM (NSSS):

» Reactor Assembly
» Primary Heat Transport System (PHTS)
» Main Moderator System & Auxiliaries (MMS)
» Reactor Regulating System (RRS)
» End Shield Cooling System (ESCS)

B - BALANCE OF PLANT (BOP):

» Main Steam System & Auxiliaries (MSS)
» Boiler Feed Water System & Auxiliaries (BFWS)
» Main Condensate System & Auxiliaries (MCS)
» Turbine-Generator System & Auxiliaries (T/G)
» Plant Services Normal Power Supply Systems
» Plant Instrumentation & Control Systems

C - BUILDINGS AND STRUCTURES:

» Reactor Building (R/B)
» Service Building (S/B)
» Integrated Building (I/B)
» Other Buildings & Auxiliary Structures

D - SSC INTERDEPENDENCIES:

» Essential safety or process primary SSC (e.g., PHTS, SDS#2, )
» Safety or process auxiliary SSC = sustain the compliance with performance requirements (e.g., P&IC)
» Safety or process support SSC = sustain the accomplishment of a safety or process function in          specified operating conditions (e.g., PHTS purification system, Dousing system)
» Safety or process I&C SSC = sustain the monitoring, surveillance and parametric control (e.g., PHTS  instrumentation & control system, Heat Transport Control Program)
» Safety and process essential supplies SSC = sustain the primary and auxiliary SSC operational status (e.g., Class IV power supply system, instrument air supply system)