Document: NUREG-0800
Document ID: 62485d6f-6b2a-4360-acb5-f874d2adc406
Document Type: srp
Title: PIPING SYSTEMS AND COMPONENTS - INSPECTIONS, TESTS,
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1808/ML18088A069.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.3
CFR Part: 
CFR Title: 

Content:
ating, ventilation, and air-conditioning support welds, and v. Refueling cavity and spent fuel pool liner welds. These other types of welding are included in the DCD Tier 2 scope. Tier 2 describes the applicable codes and standards for the other types of welding and the weld acceptance criteria. Similar to the ASME BPV Code Classes 1, 2, and 3 structural welds, these other welds are needed for protection of safety-related SSCs but do not directly prevent (or are redundant for prevention of) accidents or events. Accordingly, these other types of welding need not be included within the scope of DCD Tier 1. C. Pressure Test. The integrity of the pressure boundary is required to be maintained because it is directly involved in preventing or mitigating an accident or event under the defense-in-depth principle. The pressure boundary integrity is ensured, in part, through a pressure test verifying the leak-tightness of the ASME BPV Code piping systems. A pressure test is generally specified by the ASME BPV Code, Section III, for ASME BPV Code Class 1, 2, and 3 SSCs to verify the pressure integrity of the overall piping system, as fabricated and installed, including any welding and bolting requirements. This test is completed as part of the ASME BPV Code, Section III, Data Report, and may be verified by the corresponding ITAAC for ASME BPV Code, Section III Data Reports, which require that they exist and conclude that the SSCs meet ASME BPV Code Section III requirements. D. Equipment Seismic and Dynamic Qualification. The ITAAC should verify the seismic and dynamic qualification of each system and its components within the scope of Tier 1 for the nuclear power plant. For example, the Design Commitment should specify that the system’s Seismic Category I equipment, including its associated supports and anchorages, withstands design basis seismic loads without loss of its safety function(s) during 14.3.3−12 Draft Revision 1 – September 2018 and after an SSE. The ITA