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:
breakers and valves, as well as demonstration of the operability of manual scram functions; d. final test of the reactor coolant system to verify that system leak rates are within specified limits; e. measurements of the water quality and boron concentration (PWR) of the reactor coolant system; f. reactor coolant system flow tests to establish that: 1. vibration levels are acceptable, 2. differential pressures across the fully loaded core and major components in the reactor coolant system are in accordance with design values, and 3. piping reactions to transient conditions (e.g., pump starting and stopping) and flows are as predicted for all allowable combinations of pump operation; g. final calibration of source range neutron flux measuring instrumentation, including verification of proper operation of associated alarms and protective functions of source- and intermediate range monitors; and h. mechanical and electrical tests of in-core monitors (including traversing in-core monitors, if installed). Scram time tests should be sufficient to provide reasonable assurance that the control rods will scram within the required time under plant conditions that bound those under which the control rods might be required to function to achieve plant shutdown. To the extent practical, testing should demonstrate control rod scram times at both hot zero power and cold temperature conditions, with flow and no flow conditions in the reactor coolant system as required to bound conditions under which scram might be required. Additionally, the methods used to perform the test should be same as the test methods used after refueling evolutions. For each test condition, those control rods for which the scram times fall outside the two sigma limit of the scram time data for all control rods should be retested a sufficient number of times (e.g., three times) to reasonably ensure proper performance during subsequent plant operations. For facilities using more than one type of control