Other aspects of the layout, such as relative location and orientation of a piece of
equipment, size and location of ductwork, accessibility, etc., are based on operational
and maintenance experience.
General. Because processing steps are most often contained in individual
process rooms or cells, it is usually a good practice to separate general office
areas from nonreactor nuclear facilities. Some of the reasons for this are the risk
systems, and differing code requirements based on occupancy.
Facilities and building services are planned to achieve maximum flexibility and
ease of access. Priority in design is given to gravity-flow piped services and
utilities, large air distribution, and exhaust duct headers. When developing the
general arrangement consider the following:
Adequate space for convenient access to each component (including
piping, wiring, control tubing, etc.) during maintenance and inspection that
does not require major disassembly.
Zones (space) in vertical and horizontal service chases.
Service header sizes;
Minimizing utility runs by grouping like functions, such as laboratories,
toilet rooms, and equipment rooms.
Minimizing exterior and interior penetrations through building elements
(i.e., walls, floors, roofs, etc.).
Minimizing the amount of floor space devoted to circulation, such as
vestibules, corridors, stairs.