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5.2.2 SC-3 SSCS
This section summarizes the safety functions, boundaries, support systems, and
functional requirements for those SSCs whose preventive or mitigative function is relied on fc,r
remiator-required worker protection from radiological or toxicological hazards. These SSCs are
designated SC-3 SSCs. The following SSCs have been identified as SC-3 SSCs.
Fire Suppression, Detection, and Alarm System (fire phones, fire bells, and the water
gong alarms).
Life Safetymisaster Warning System.
Table 5-3 provides a matrix of the Building 991 Complex SC-3 SSCs. Coluk 1 of the
table identifies the SSC identified as a SC-3 SSC and the specific attributes of that SSC that
make it a SC-3 SSC. The “Safety Function” column of the table provides the reason the SSC
was designated as a SC-3 SSC. This column specifically identifies the safety function credited
in the safets analysis. Non-safety functions are not provided in this column. If the accident 1
analysis requires that the SSC be relied on to operate after a NPH event, that hction will be
identified in this column. The “Boundaries” column of the table identifies the specific portions
of the SSC that are being relied upon in the accident analysis. This column attempts to be
specific in the portions of the SC-3 SSC that must be maintained at the level specified in the I
TSRs to meet the identified safety function. The “Support Systems” column identifies those
SSCs whose failure would result in the SC-3 SSC not being able to perform its identified safety I
function. The “Functional Requirements” column defmes the operability requirements for the
identified SC-3 SSC. These requirements are necessary for the SC-3 SSC to meet its safety I
function. These functional requirements specifically address the pertinent response parameters
related to an accident for which the safety function is being relied upon. The acceptance criteria
along with the specific surveillance requirements and frequencies for the SSC are provided in
Appendix A, Building 991 Complex Technical Safe9 Requirements, as identified in the last
column of the table, “TSR”. The TSR column provides the linkage from this section to the I
implementing control specified in Appendix A, Building 991 Complex Technical Safe@
Requirements.
Revision 1.
SooTernber 1999
5-13 Building 991 Complex FSAR