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limits on container radioactive material, and restriction of selected items (e.g., combustibles,
flammable gases).
1.6 DESIGN FEATURES
DESIGN FEATURES are the facility passive protective features that reduce the
frequency and/or mitigate the consequences of uncontrolled releases of radioactive or other
hazardous materials from the facility for postulated accident scenarios analyzed in the FSAR.
These DESIGN FEATURE descriptions are provided in the TSRs to assure that evaluations of
proposed changes or modifications to these DESIGN FEATURES are properIy performed and
documented, consistent with requirements specified in the TSRs.
1.7 FREQUENCY NOTATION
The frequency notations, as used in surveillances and elsewhere, are defined as follows
when included in the TSR:
Notation
Once per Working Shift
Once per Day
Once per Week
Once per Month
Once per Quarter
Once per 6 Months
Once per Year
Once per 18 Months
Once Der 3 Years
Minimum Freauencv (Periodicitv Notation)
At least once per Working Shift.
At least once per 24 hours.
At ieast once Der 7 days.
At least once per 3 1 days.
At least once per 92 days.
At least once Der 6 months.
At least once per 12 months.
At least once Der 18 months.
At least once oer 36 months
1.8 TECHMCAL SAFETY REQUIREMENTS BASES CONTROL
The contractor may make changes to the TSR BASES without prior Department of
Energy-Rocky Flats Field Office (DOE-RFFO) approval provided the changes do not involve
any of the following:
1. A change in the controls specified in the TSRs; or
2. A change to the FSAR that involves a positive USQ.
Proposed changes that meet the criteria of (1) or (2) above shall be reviewed and
approved by the DOE-RFFO prior to implementation. Changes to the BASES that may be
Revision L.
September 1999
A-12 Building 991 Complex FSAR
Appendix A