Document: NRC Regulatory Guide
Document ID: 47b09be1-4bf8-45f9-a099-7fed871c09bd
Document Type: regulatory_guide
Title: Plant-Specific, Risk-Informed Decisionmaking: Inservice Testing (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2114/ML21140A055.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.175
CFR Part: 
CFR Title: 

Content:
ould address each of the principles of risk-informed decisionmaking discussed in RG 1.174 and repeated in this guide and identify the appropriateness of chosen approaches and methods (whether they are quantitative or qualitative, deterministic or probabilistic), data, and criteria for considering risk for the decision to be made. 1. Element 1: Define Proposed Changes to the Inservice Testing Program This first element of the process defines the proposed changes to the IST program. This involves describing what IST components (e.g., pumps and valves) will be involved and how their testing would be changed. This element also identifies supporting information and a proposed plan for the licensee’s interactions with the NRC throughout the implementation of the RI-IST. 1.1 Define the Proposed Change The licensee should prepare a full description of the proposed changes in the IST program. This description would include the following: • Identify the aspects of the plant’s design, operations, and other activities that the licensee proposes to modify together with implementation of the proposed RI-IST program such that the licensee can submit any necessary license amendment requests in addition to the alternative request to implement the proposed RI-IST program in accordance with 10 CFR 50.55a(z)(1). This will provide a basis from which the staff can evaluate the proposed RI-IST program in the context of any proposed changes that are outside the scope of the RI-IST program alternative request. • Identify the specific revisions to existing testing schedules and methods resulting from implementation of the proposed program. • Identify the components in the plant that are directly and indirectly involved with the proposed testing changes, including any components that are not presently covered in the plant’s IST program but are determined to be important to safety (e.g., through PRA insights), and the particular systems that would be affected by the proposed