System Analysis

DOE-STD-1052-93

If the failure mode should be addressed by a PM task, select a task as

described in Section 8, Preventive Maintenance Task Selection and

Implementation."

6.6.6

Before the FMEA is approved, it should be reviewed by knowledgeable

technical support and maintenance personnel to ensure the analysis was

comprehensive and technically accurate. FMEA reviews may be performed

in meetings with the appropriate personnel to expedite the review and gain

insight for future analysis.

7. SYSTEM ANALYSIS

This section describes a process that may be used to analyze plant systems to improve system

reliability and optimize use of resources. The purpose of a system analysis is to identify

critical components whose failures should be controlled or eliminated to preserve important

system functions. Additionally, this section provides a strategy for analyzing noncritical

components. The steps of the analysis to determine necessary PM tasks are described in the

following sections:

System Selection and Prioritization - This section describes selection and prioritization

of plant systems based on importance to nuclear safety, reliability, and cost.

Data Collection - This section describes the sources and types of data that should be

collected to perform the analysis.

System and Subsystem Boundary Determination - This section describes the method

for determining boundaries and interfaces of systems and subsystems.

Determination of System and Subsystem Function(s) - This section provides guidance

for determining the functions of systems and subsystems.

Determination of Functional Failures - This section provides a method for

determining likely component failures that may cause the loss of system or subsystem

function(s).

Functionally Critical Equipment (FCE) Selection - This section provides guidance

for determining critical components and instrumentation that may cause important

system functions to fail.

Analysis Strategy for Critical and Noncritical Components - This section describes

the analytical method for determining component failure modes, causes, and failure

consequences of the functionally critical components and discusses run-to-failure

strategy for noncritical components.

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