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Repair/Replacement Activities for Nuclear Power Plant Items

Excerpt

Article IWA-4000 of Section XI of the Boiler and Pressure Vessel (B&PV) Code contains the requirements for performing repair/replacement activities on nuclear power plant items. The repair/replacement activity requirements of IWA-4000 apply to a component after it has met all of the Construction Code requirements. This chapter examines the background of these repair/replacement activities, notes some of the significant restructuring of paragraphs and terminology and important changes in repair/replacement activity requirements since the original 1970 Edition, and reviews and discusses the requirements in IWA-4000 in the 2015 Edition of Section XI. This chapter is beneficial to personnel performing such repair/replacement activities as designing plant modifications, obtaining replacement items, and performing welding, brazing, defect removal, fabrication, installation, examination, and pressure-testing activities.

28.1Introduction
28.2Background of Repair/Replacement Activity Requirements
28.3Scope and Applicability of Repair/Replacement Activity Requirements
28.4Alternative Requirements
28.5Responsibilities
28.6Repair/Replacement Program and Plan
28.7Additional General Requirements
28.8Requirements for Items Used in a Repair/Replacement Activity
28.9Design Associated with Repair/Replacement Activities
28.10Welding, Brazing, Metal Removal, Fabrication and Installation
28.11Examination and Testing Requirements
28.12Alternatives to Construction Code Welding
28.13Plugging and Sleeving of Heat Exchanger Tubing
28.14Code Cases
28.15Future Considerations
28.16References

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