Design Considerations - hdbk1132990082

DOE-HDBK-1132-99

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

section.

2.5.2

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

equipment.

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.

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