Systems Exam 1 - Surveillance & Operability Flashcards
Top 3 High Safety Significance Components (HSSCs)
- TDAWFP
- SSWPs
- EDGs
Define Operability
→provides the specified safety function and support functions
→expected to perform as designed, tested, and maintained
→has all necessary attendant instrumentation, controls, normal or emergency electrical power, cooling and seal water, lubrication, and other auxiliary equipment
Master Surveillance Test List (MSTL)
a document listing the implementing and trigger procedures, programs and administrative processes satisfying the test and inspection requirements of Technical Specifications, the TRM, Part I of the ODCM and the IST Plan
(applicable Modes and frequencies are also indicated)
Is repetitive SR testing allowable?
No, but you can recalibrate test instruments and then repeat pump or valve tests.
(equipment must still be declared inoperable as soon as the data is recognized as being outside the acceptance criteria)
Does Maintenance invalidate previous SR results?
Not necessarily, per Ops GL 18, Att. 5.
Controlled LCO Action Entry
Voluntary entry into LCO Actions for various reasons, including testing and corrective or preventive maintenance; shall be authorized by the Shift Operations Manager, Shift Manager, or as part of a planned schedule.
What does “available” mean?
→Safety Significant Component (SSC) is capable of performing its specified function(s) to support operation of plant systems or plant evolutions
→status is used to provide a “defense in depth” measure to assure the availability of functions necessary to support the present operational condition of the plant →available implies the equipment is functional but does not satisfy OPERABILITY requirements.
Systems Important to Safety Log (SISL)
A form or electronic program entry used to track selected Out-Of-Service equipment for systems not required by Tech Specs, TRM or the ODCM, but are considered as directly impacting plant safety.
→AMSAC →Instrument Air
→Spent Fuel Pool Cooling →RMUW
→Safeguard Sump Pumps →Fire Protection Equipment
→Emergency Lighting →Plant Computer
→Major valves associated →Limitorque Motor Operated Valves
with ERG support requiring cable ties to restrain
the declutch levers
No Technical Specification equipment may be entered into this log.
Tracking LCOARs
Are used to track conditions affecting SSCs where entry into the applicable LCO is not required
Outage LCOARs
Should be closed or converted to an Active or Tracking LCOAR as required prior to the Applicability required by the associated SSC LCO
(previously had a Mode 2 closure requirement, but no longer has any Mode restrictions due to various Mode 1 hot torques)
Loss of Safety Function
Lost both trains. An Operability determination is performed to establish which LCO(s) are not met, then SFD is performed for support system.
For the purpose of the Safety Function Determination Program (SFDP), a LOSF may exist when a Support System is inoperable, and:
1. A required system redundant to the system(s) supported by the inoperable Support System is also inoperable; or
2. A required system redundant to the system(s) in turn supported by the inoperable Supported System is also inoperable; or
3. A required system redundant to the Support System(s) for the Supported Systems A) and B) above is also inoperable.
Mission Time
The time duration for SSC operation that is credited in the design basis for the SSC to perform its specified safety function.
The term “mission time” is not routinely used in the TS Bases or FSAR; however, the description of the affected SSC’s or support SSC’s (SSC supporting the functions of the affected SSC) Specified Function/Specified Safety Function can be utilized to determine the time duration credited for the affected SSC. Per STI-422.01.
