SSC Specifications PDF Print E-mail

Definition:

SSC Specifications are statements that define how a particular SSC will fulfill a specific Design Bases Specification.


SSC Specifications translate the general plant-related DBS into specific functions and criteria for SSCs. SSC Specifications translate facility level DBS statements into the specific functions and specifications necessary for unique systems, components, or structures. In the NEI 97-04 taxonomy, these would be considered SSC Functions, but the term Specification was used here to reflect the broader sense of a system, structure, or component requirement.



Example 1:

A function of the CCW System is to operate at a pressure higher than that of the Essential Service Water System (SX) to avoid contamination of the CCW System by sea water.

Example 2:

A function of the AFW System is to operate with an unreliability value in the range of 1.0E-4 to 1.0E-5 or better per demand.

Example 3:

A function of the Auxiliary Feedwater System is to provide secondary quality makeup water to the steam generators when the main Feedwater System is inoperable or unavailable.

Example 4:

A function of the AFW System is that it be able to be controlled under a post-accident environment from either the main control board or the remote shutdown panel.
 

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