Engineering Change Control Manual - Engineering TFC-ENG-DESIGN-C-06 - Rev M-4 - Document Control

Oct 28, 2026

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Engineering Change Control Manual defines the process and responsibilities for controlling changes to drawings for TOC facilities. It establishes how to document and approve design changes through DCNs and ECNs before implementation, including construction, fabrication, and incorporation. The manual states applicability to operations, maintenance, and project work involving SSCs. It specifies required workflows and approvals, and it lists excluded change types such as direct drawing revisions, software changes, vendor information, and technical document or interface control changes.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages29

Reading Time1 h 13 min

AccessFree to download

1.0 PURPOSE AND SCOPE

2.0 IMPLEMENTATION

3.0 RESPONSIBILITIES

3.1 Quality Assurance

3.2 Commissioning

3.3 Engineering

4.0 PROCEDURE

4.1 General Requirements

4.2 Drawing Change Notice Preparation

4.3 Engineering Change Notice Preparation

4.4 Work Authorization Engineering Change Notice Preparation

4.5 Redline Engineering Change Notices

4.6 Drawing Change Notice and Engineering Change Notice Release

4.7 Off-Shift Drawing Change Notice and Engineering Change Notice Release

4.8 Engineering Change Notice Close-out Process

4.9 Engineering Change Notice Cancellation

5.0 DEFINITIONS

6.0 RECORDS

7.0 SOURCES

7.1 Requirements

7.2 References

| Engineering Change Control Manual
Document
Page
Issue Date | Engineering
TFC-ENG-DESIGN-C-06, REV M-4
1 of 29 April 18, 2024 | | --- | --- | | Ownership matrix | RPP-27195 | | --- | --- | TABLE OF CONTENTS 1.0 PURPOSE AND SCOPE ................................................................................................................ 2 2.0 IMPLEMENTATION ..................................................................................................................... 2 3.0 RESPONSIBILITIES...................................................................................................................... 2 3.1 Quality Assurance............................................................................................................... 2 3.2 Commissioning ................................................................................................................... 2 3.3 Engineering......................................................................................................................... 3 4.0 PROCEDURE................................................................................................................................. 4 4.1 General Requirements.........................................................................................................4 4.2 Drawing Change Notice Preparation .................................................................................. 6 4.3 Engineering Change Notice Preparation............................................................................. 7 4.4 Work Authorization Engineering Change Notice Preparation ........................................... 9 4.5 Redline Engineering Change Notices ............................................................................... 12 4.6 Drawing Change Notice and Engineering Change Notice Release .................................. 12 4.7 Off-Shift Drawing Change Notice and Engineering Change Notice Release................... 12 4.8 Engineering Change Notice Close-out Process ................................................................ 12 4.9 Engineering Change Notice Cancellation ......................................................................... 14 5.0 DEFINITIONS .............................................................................................................................. 14 6.0 RECORDS .................................................................................................................................... 15 7.0 SOURCES..................................................................................................................................... 15 7.1 Requirements .................................................................................................................... 15 7.2 References ......................................................................................................................... 16 TABLE OF FIGURES Figure 1 – DCN Process Flow Chart .......................................................................................................... 18 Figure 2 – ECN Process Flow Chart ........................................................................................................... 19 Figure 3 – Guidance for Determining the Current Design Configuration .................................................. 20 Figure 4 – WA ECN Process Flow Chart ................................................................................................... 21 TABLE OF ATTACHMENTS Attachment A – Modification Quality Inspection Plans (MQIP) ............................................................... 22 Attachment B – WA ECN Examples.......................................................................................................... 26 Attachment C – Trend Codes and Definitions .....................................................................................

FAQs

What is the purpose of this Engineering Change Control Manual?

It defines the process and responsibilities for controlling changes to drawings for TOC facilities and ensures changes are documented and approved before implementation.

What types of changes are covered by the DCN/ECN process?

It covers engineering design changes developed by TOC or vendor personnel, including how to create, revise, and process DCNs and ECNs prior to construction, fabrication, and incorporation.

Which change types are explicitly not covered by this procedure?

It does not apply to direct drawing revisions, changes to plant installed software, changes to vendor information, changes to technical documents, changes to interface control documents, and changes to ERB.

Oct 28, 2026

Upload by Rhys