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5B.0 GENERAL APPLICATION BASES
Revision 1
Saptcmher 1999
ACs 5.0.1 through 5.0.5 establish the rules for AC use and application and are applicable
to all ACs at all times, unless otherwise stated. Since ACs are primarily for
DEFENSE-IN-DEPTH and worker safety, the requirements are not as rigorous and the
safety impact of individual failures is not as severe as for engineered system LCOs and
SRs. These AC rules are fully consistent with the Applicability LCOs and general SRs
and their BASES, which are provided to control LCOs and SRs for the engineered
s ys terns.
AC 5.0.1 establishes the requirement that ACs are to be met at all times. Each AC is
divided into two distinct requirement sections. All ACs will have CREDITED
PROGRAMMATIC ELEMENTS. Certain ACs will contain specific controls or
restrictions consisting of limits and controls that have associated action statements. The
manner in which the ACs are met is defined by either specific controls or restrictions
with an associated action statement or by adherence to CREDITED PROGRAMMATIC
ELEMENTS.
ACs 5.0.2 through 5.0.4 establishes the rules under which failures in AC programs
progress fiom the level of individual failures of CREDITED PROGRAMMATIC
.ELEMENTS or failure of specific controls or restrictions through to VIOLATION of the
AC.
CREDITED PROGRAMMATIC ELEMENTS is a defined term relating to
programmatic elements that are credited for controlling the progression of an accident
scenario. These elements minimize the potential frequency or consequence of an
accident scenario. They are reflected in assumed operational aspects that impact base
frequency or available hazardous material assumptions. Controls or restrictions relate to
aspects of operation that limits the frequency or consequence of an accident scenario
These latter conform to the limits of the analysis (e.g., total material-at-risk in a facility
available for involvement in a seismic event or maximum amounts of material-at-risk
allowed in certain containers or locations).
A- 108 Building 991 Complex FSAR
Appendix h