Document: NRC Regulatory Guide
Document ID: c256f223-ee35-43e0-82e7-aa7b14469259
Document Type: regulatory_guide
Title: Preoperational Testing of Emergency Core Cooling Systems for Pressurized Water Reactors + HISTORY - HISTORY DG-1253 , Proposed Revision 2 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1101/ML110110480.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.79
CFR Part: 
CFR Title: 

Content:
tely and independently each channel or bus to identify any failures or losses of redundancy. Testing should include all backup and redundant controls. (2) Verify design acceptance criteria are met for operation of interlocks and equipment protective devices in pump and valve controls. e. Power Supplies (1) Verify design acceptance criteria are met for operation of normal and all alternative electric power supplies used for system valves, pumps, and motors. (2) Verify design acceptance criteria are met for operation of automatic and manual power transfer switches. f. System Piping and Supports Verify design acceptance criteria are met for system piping movements under system startup conditions and during steady-state operation. The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Section III, Sections NB/NC/ND-3620, “Design Considerations,” and NB/NC/ND-3622.3, “Vibration” (Ref. 6), provides a robust methodology for testing, monitoring, evaluating, and controlling piping system vibration. 3. Documentation The preoperational testing program should be documented in a summary report and retained as part of the plant historical record. This summary report should include the following: a. a listing and description of the objectives of each test; b. a description of how each test was conducted; c. the parameters monitored; d. complete comparisons and evaluations against design predictions or system performance requirements for the HPSI flow tests, the MPSI flow tests, the LPSI flow and recirculation tests, the core flooding tests, the ELS flow and isolation tests, and the passive AP1000 ECCS tests; e. any discrepancies or deficiencies noted; DG-1253, Page 10 f. system modifications and corrective actions required; g. appropriate justification for acceptance of systems or components not in conformance with design predictions or performance requirements; h. any unexpected or unusual conditions during test observations; and i.