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RISK-FOCUSES MAINTENANCE (RFM)

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asset-integrity-process-safety-management-techniques

RFM METHODOLOGY
Determine if Component is SCE or not Evaluate RFM for SCE identified Not included in RFM Process

RISK-FOCUSES MAINTENANCE (RFM)
RFM is a technique for establishing a Reliability-Centered Maintenance (RCM) program. The
RFM process is to focus maintenance resources only on components that enable plants to fulfill their essential functions when called upon, and/or to focus on components, which failure may initiate challenges to safety systems, so as to realize the greatest beneficial impact in reducing risk. In other words, RFM addresses the maintenance of TI Barriers and associated SCEs.
RFM process addresses only a portion of the RCM, which in turn addresses all portions or selected portions) of total plant maintenance program. Therefore, use of the RFM process should not preclude other maintenance activities.
RFM METHODOLOGY
RFM method consists of two major steps 1) Identifying SCEs, and 2) Determining what maintenance activities are required to ensure reliable operation of the SCEs identified [2]. For TI purposes, the SCEs are identified through Hazard and Effect Management Process, in association with eight TIB as illustrated in Figure 1. Figure 3 illustrates the top-level RFM process.
(1) No
(2) Yes
(3) Fig Top-level RFM Process
Determine if
Component is
SCE or not
Evaluate RFM
for SCE
identified
Not included in
RFM Process
SCE?
PSAM-12

9

Probabilistic Safety Assessment & Management (PSAM) Conference

After identification of SCEs, a single approach of two steps is used to establish an RFM program. The first step is to determine the dominant component failure modes that should be prevented. The second step is to determine maintenance activities that will prevent the occurrence of those dominant failure modes. Figure 4 illustrates the maintenance evaluation for SCEs.
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