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TERM DEFINITION
DESIGN FEATURES Those passive features which, if altered or modified, could have a
significant effect on safety.
DISCOVERY/
The point in time when it is realized that a CONDITION has been
DISCOVERED entered.
EMERGENCY
EVACUATION
Any evacuation as a result of a significant deviation from planned
or expected behavior or course of events that could result in
significant consequences to people, property, the environment, or
security. It includes unusual events, alerts, Site emergencies, and
general emergencies.
LIMITING CONDITION The lowest functional capability or performance level of SAFETY
FOR OPERATION &CO) SSCs and their support systems required for safe operations of the
facility.
NUCLEAR MATERIAL, Includes Special Nuclear Material (enriched uranium,
uranium-233, uranium-235, or plutonium), americium, or
neptunium in quantities of one gram or more. It does not include
natural uranium, depleted uranium, contamination, or sealed
sources.
OPERABLE/
OPERABILITY
OUT OF COMMISSION
A SAFETY SSC shall be OPERABLE when it is capable of
performing its safety function(s) as specified in Chapter 5 of the
FSAR for compliance with the TSRs.
Identifies equipment that has been rendered not available or
credited for operation. OUT OF COMMISSION equipment is
considered to be administratively removed from the facility and
no longer subject to the requirements specified in the TSRs.
OUT OF COMMISSION implies that actual physical
modification, isolation, or removal can be performed without
affecting the overall safety of the facility. For the purpose of the
TSRs, equipment, systems, andor areas are OUT OF
COMM[SSION when all of the following conditions have been
satisfied:
a. The isolation boundary and the affected equipment is
properly tagged or labeled and controlled in a manner that
will prevent use.
b. An evaluation of the administrative removal of the affected
equipment from service on facility safety has been
performed.
c. Analysis shows that any radioactive or other hazardous
material remaining in the OUT OF COMMISSION
equipment is safely contained.
A-7 Building 991 Complex FSAR
Appendix A