NBIC NB 23 Part 3

NBIC NB 23 Part 3 – Repairs and Alterations, 2023 Edition

This part provides requirements and guidelines that apply when performing repairs and alterations to pressure-retaining items.

The National Board administers four specific accreditation programs:

“R” — Repairs and Alterations to Pressure-Retaining Items
“NR” — Repair and Replacement Activities for Nuclear Items
“VR” — Repairs to Pressure Relief Valves
“T/O” — Test Only of Pressure Relief Valves

This part describes some of the administrative requirements for the accreditation of repair organiza-tions. Additional administrative requirements can be found in:

NB-415,Accreditation of“R”Repair Organizations
NB-417,Accreditation of “NR” Repair Organizations
NB-514,Accreditation of “VR” Repair Organizations
NB-528,Accreditation of “T/O” Test Only Organizations

Requirements for repairs to pressure relief valves can be found in NBIC Part 4.

The NBIC recognizes four important areas of post-construction activities where information, understanding, and following specific requirements will promote public and personal safety. These areas include:

• NBIC NB 23 Part 1 – Installation
• NBIC NB 23 Part 2 – Inspection
• NBIC NB 23 Part 3 – Repairs and Alterations
• NBIC NB 23 Part 4 – Pressure Relief Devices