Document: NRC Regulatory Guide
Document ID: 74c49394-8dbf-46e7-b62a-b85de93b47d8
Document Type: regulatory_guide
Title: Initial Test Programs for Water-Cooled Nuclear Power Plants + HISTORY - HISTORY 11/2012 – DG-1259 , Proposed Revision 4 11/2006 – DG-1166 , Proposed Revision 3 (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1229/ML12298A071.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.68
CFR Part: 
CFR Title: 

Content:
nce prototype plant of similar design and configuration (PWR). u. Demonstrate the operability of major or principal plant control systems, as appropriate. A-5. Power-Ascension Testing Licensees should complete low power tests, as described in the FSAR, and evaluate and approve the low power test results before beginning the power-ascension tests. Power ascension tests should demonstrate that the facility operates in accordance with design during normal steady state conditions and, to the extent practical, during and following anticipated transients. The tests should demonstrate that measured responses are in accordance with predicted responses to validate the analytical models. The predicted responses should be developed using real or expected values of attributes such as beginning of life core reactivity coefficients, flow rates, pressures, temperatures, pump coast down characteristics, and response times of equipment, as well as the actual status of the plant (not those values or plant conditions assumed for conservative evaluations of postulated accidents). Tests and acceptance criteria should be prescribed to demonstrate the ability of major or principal plant control systems to automatically control process variables within design limits. Such tests are expected to provide assurance that the facility’s integrated dynamic response is in accordance with design for plant events such as reactor scram, turbine trip, reactor coolant pump trip, and loss of feedwater heaters or pumps. Testing should be sufficiently comprehensive to establish that the facility can operate in all operating modes for which it has been designed; however, tests should not be conducted, or operating modes or plant configurations established, if they have not been analyzed or if they fall outside the range of assumptions used in analyzing postulated accidents in the facility’s FSAR. Appropriate consideration should be given to testing at the extremes of possible operating modes for