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Guidance per DM - Summary

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There are some specific cases where the S-RBI assessment approach, in IMS PEI, changes, depending on the Equipment/Component type or the Degradation Mechanism. This section gives guidance for the specific Degradation Mechanisms. In another section you can find Guidance per Special Emphasis Component.

The DMs, for which specific modelling is implemented in IMS, is highlighted in the table below.

Specific modelling for different Degradation Mechanisms (DMs) – summary:

RBI Methodology
Equipment Type
Component Type
Degradation Mechanism (DM)
DM characteristics
IF Table
Max Inspection Interval (MII)
Inspection Strategy (IS)

Main

*

*

*

Age-Related

Half Life

RL*IF

-

Main

*

*

Creep

Age-Related

Half Life

RL user entered, RL*IF

-

Main

*

*

*

Non-Age-Related

-

-

NAR table

Main

*

*

HTHA

Non-Age-Related

 -

HTHA table

 -

Main

*

*

Slow Acting SCC

Non-Age-Related

Slow Acting SCC table

SCC NAR table

Main

*

*

Moderate Acting SCC

Non-Age-Related

Moderate Acting SCC table

SCC NAR table

Main

*

*

Fast Acting SCC

Non-Age-Related

 -

Fast Acting SCC table

SCC Fast NAR table

Main

*

*

Non-Corrosive

Non-Age-Related

 RL*0.8

Review only

Main

*

*

CUI-CS

Strategy Based

IF=1 

 RL*1 

CUI CS table

Main

*

*

CUI-SS

Strategy Based

-

Based on slow Acting SCC table

CUI SS table

Notes:

* Always applicable unless overwritten by another specific case.

- Not Applicable.