Maximo for Nuclear Power extends the core Preventive Maintenance (PM) application in a number of ways. The PM record is used to generate work orders and surveillances.
- PMs are normally time or meter based but work orders and surveillances can also be generated on-demand from a PM as would be the case if a particular plant event occurs.
- When a work order or surveillance is generated from a PM it can apply an Impact Plan that can generate a set of Permits or it can create a Clearance from a clearance template.
- A PM can be the subject of a commitment created in Commitment Tracking or placed under corrective action control from a Condition Report.
- Fields are added to the PM to support Standard Nuclear Performance Model (SNPM) reporting. These are copied to the work order when it is generated from the PM.
- PM records can be created based on the Surveillance Requirements needed to support a technical specification created in the Tech Specs application. This is used for tracking the testing of multiple plant components from a single PM.
- PM Sequences are used to link related PMs. This provides the ability to stagger PMs or Surveillance Tests across multiple locations or assets within a unit or across multiple units which might be needed for safety or work efficiency reasons.
- A Frequency Sequence gives the ability to define a non-linear time-based frequency to better fit with complex rotations, for example, setting up a monthly PM as 4, 4, 5-week frequencies.
- A regulatory frequency can be entered independent of the Maximo time-based frequency and a regulatory date can be calculated based on the last work order’s actual start. A grace period percentage can be used to calculate a grace period and dead dates. When the 3.25 rule is applied the grace period is calculated over three consecutive work orders which must be completed within 3.25 times the frequency of the PM. The grace periods and dead dates make it easier to reschedule work and surveillances.
The PM Frequencies application is used to create standardized frequencies as defined in technical specifications for surveillance testing. It is a template for time-based frequencies used on PM records. The PM Frequency Name is referenced on a PM and the details of the PM Frequencies record are copied to the PM record.
The PM Frequencies record defines regulatory frequencies and Maximo time-based frequencies, grace periods, 3.25 rule settings, the frequencies used in a frequency sequence and seasonal dates and days of week when work can be performed.