Well, I could explain it to you! It may take me several years to type the post though! What in particular would you like to know? PM me and I may be able to forward some info in your direction.
As a starter:-
Overview
The Fuel System includes nine subsystems which control all fuel
related functions of the Airplane.
Fuel Storage Tanks
The Aircraft structure is used to store fuel. Construction features
include tank access, venting and sump drain valve installations.
Fuel Quantity Indication
Fuel quantity indication covers the Electronic System and
components used to measure, monitor, display and activate various
controls used during ground servicing or in-flight management of the
Fuel System. The manual method of determining the Aircraft fuel
load is also described in this subsystem.
Fuelling
Fuelling includes pressure fuelling control and operation as well as
manual (overwing) fuelling.
Engine Feed
This section includes the Fuel Supply System for Engine operation.
Also covered are System interconnections for operations such as
crossfeed, jettison and defuelling.
APU Feed
APU feed covers the APU Fuel Supply System, components and
operation.
Reserve to Main Tank Transfer
This subsystem covers the components required to transfer fuel from
the Reserve to the Main Wing Tanks.
Horizontal Stabilizer Fuel Transfer
This subsystem covers the components needed to fuel, transfer and
jettison fuel from the Horizontal Stabilizer Fuel Tank.
Scavenge
The Scavenge System equipment is installed to convert residual fuel
into usable fuel.
Jettison
Jettison is the in-flight system used for Aircraft rapid weight
reduction. Alternate jettison functions include fuel transfer, Engine
feed and defuelling.