An electric power generator comprising: a generator housing containing a cooling fluid; a rotor shaft extending through said housing; a seal assembly positioned about said rotor shaft to prevent leakage of cooling fluid from said generator housing, said seal assembly comprising: a bracket affixed to said housing, wherein said bracket includes an inlet connectable to power plant piping external to said generator for receiving a supply of sealing fluid, said inlet in communication with a bracket passageway for admitting the sealing fluid in a radially inner section of the bracket; and a sealing cartridge mountable in an annulus defined by said bracket, wherein said sealing cartridge includes at least one cartridge passageway in communication with said bracket passageway for admitting the supply of sealing fluid and passing said supply of sealing fluid to establish a sealing boundary about the rotor shaft, characterised in that: at least one of the radially inner section of the bracket or a radially outer section of the sealing cartridge includes a first sealing-fluid distribution channel additional to said annulus in which the sealing cartridge is mountable, the first sealing-fluid distribution channel extending along a radial direction over an arc-length for providing fluid communication between the bracket passageway and the at least one cartridge passageway; and in the mounting of the sealing cartridge in the annulus defined by the bracket a radially outwardly facing surface of the radially outer section of the sealing cartridge abuts a radially inwardly facing surface of the radially inner section of the bracket, and said first sealing-fluid distribution channel comprises a recess formed in said radially inwardly facing surface of the bracket or said radially outwardly facing surface of the sealing cartridge. a generator housing containing a cooling fluid; a rotor shaft extending through said housing; a seal assembly positioned about said rotor shaft to prevent leakage of cooling fluid from said generator housing, said seal assembly comprising: a bracket affixed to said housing, wherein said bracket includes an inlet connectable to power plant piping external to said generator for receiving a supply of sealing fluid, said inlet in communication with a bracket passageway for admitting the sealing fluid in a radially inner section of the bracket; and a sealing cartridge mountable in an annulus defined by said bracket, wherein said sealing cartridge includes at least one cartridge passageway in communication with said bracket passageway for admitting the supply of sealing fluid and passing said supply of sealing fluid to establish a sealing boundary about the rotor shaft, a bracket affixed to said housing, wherein said bracket includes an inlet connectable to power plant piping external to said generator for receiving a supply of sealing fluid, said inlet in communication with a bracket passageway for admitting the sealing fluid in a radially inner section of the bracket; and a sealing cartridge mountable in an annulus defined by said bracket, wherein said sealing cartridge includes at least one cartridge passageway in communication with said bracket passageway for admitting the supply of sealing fluid and passing said supply of sealing fluid to establish a sealing boundary about the rotor shaft, at least one of the radially inner section of the bracket or a radially outer section of the sealing cartridge includes a first sealing-fluid distribution channel additional to said annulus in which the sealing cartridge is mountable, the first sealing-fluid distribution channel extending along a radial direction over an arc-length for providing fluid communication between the bracket passageway and the at least one cartridge passageway; and in the mounting of the sealing cartridge in the annulus defined by the bracket a radially outwardly facing surface of the radially outer section of the sealing cartridge abuts a radially inwardly facing surface of the radially inner section of the bracket, and said first sealing-fluid distribution channel comprises a recess formed in said radially inwardly facing surface of the bracket or said radially outwardly facing surface of the sealing cartridge.