Document: NUREG-0800
Document ID: 9ddfc163-172f-42cd-ad01-251464de43ac
Document Type: srp
Title: -26
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1233/ML12334A360.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.3
CFR Part: 
CFR Title: 

Content:
Draft Revision 3 – June 2013 Active Pumps and Valves - A pump or valve which must perform a mechanical motion in order to shut down the plant or mitigate the consequences of a postulated event. Safety and relief valves are specifically included. Component and Support Functionality and Functional Capability - Ability of a component, including its supports, to deliver rated flow and retain dimensional stability when the design and service loads, and their resulting stresses and strains, are at prescribed levels. Component and Support Operational Readiness - Ability of an active component, including its support, to perform the mechanical motion required to fulfill its designated safety function consistent with operational limits and Technical Specification requirements. Additional discussion of functionality and operational readiness is included in RIS 2005-20, “Revision to Guidance Formerly Contained in NRC Generic Letter 91-18,’Information To Licensees Regarding Two NRC Inspection Manual Sections on Resolution Degraded and Nonconforming Conditions and On Operability,’” dated September 26, 2005. Design Basis Pipe Breaks - Those postulated pipe breaks other than a LOCA or MS/FWPB. This includes postulated pipe breaks in Class 1 branch lines that result in the loss of reactor coolant at a rate less than or equal to the capability of the reactor coolant makeup system. This condition includes loads from the postulated pipe breaks, itself, and also any associated system transients or dynamic effects resulting from the postulated pipe break. Design Limits - The limits for the design loadings provided in the appropriate subsection of Section III, Division 1, of the ASME Code. Design Loads - Those pressures, temperatures, and mechanical loads selected as the design basis for a component. Functional System - That configuration of components which, irrespective of ASME Code Class designation or combination of ASME Code Class designations, performs a particular