This section applies to a water-pool type of storage facility. Dry-type and spent
fuel storage facilities that are part of a reactor facility are not covered by this
Design Considerations . The design of IFMSFs should consider inclusion of the
design features described below. Design requirements vary significantly
depending on the characteristics of the material, the type of storage, and the
characteristics of the site.
The cooling water system for a water-pool type IFMSF should perform its
required functions during normal and anticipated operating conditions and
should be capable of limiting the maximum pool temperature. If pool
boiling is used as an emergency cooling mechanism, the ventilation
system design should consider the quantity of vapor being generated.
Concrete and structural design should consider elevated temperatures.
Drainage of condensate should be considered in the structure and
If the emergency makeup system is not permanently installed, the time
required to implement its operation should be conservatively less than the
time required to lower the pool water level to the minimum allowable
depth or raise the pool temperature to boiling.
A pool water cleanup system should be provided to maintain water clarity,
provide long-term cladding integrity, maintain structural integrity of the
storage racks and other submerged structures, and minimize exposure
rates and airborne contamination levels on the operating floor to ALARA
levels. The piping configuration for the pool cooling water and cleanup
system should be designed to eliminate the possibility of siphoning the
pool water to a level below the minimum depth required for shielding
and/or cooling. Cooling and cleanup systems should consider material
deposition and plate-out in piping and equipment.