USNRC STANDARD REVIEW PLAN

The circulating water system (CWS) provides a continuous supply of cooling water to the main condenser to remove the heat rejected by the turbine cycle and auxiliary systems. 1. The ASB reviews the performance of the CWS with respect to its functional requirements and the effects of adverse environmental occurrences, abnormal operational transients, or accident conditions such as loss of offsite power. 2. The ASB reviews the CWS and its interfaces with other systems to determine that a malfunction, failure of a component, or failure of a circulating water pipe including the failure of an expansion joint do not have unacceptable adverse effects on the functional performance capabilities of safety-related systems located in the immediate area. 3. ASB further reviews the design of the circulating water system with respect to the following: a. The capability to prevent or detect and control flooding of safety-related areas so that the intended safety function of a safety system or component will not be precluded due to circulating water system leakage. b. Provisions to annunciate abnormal and unsafe operating conditions. 4. ASB also performs the review of high- and moderate-energy pipe breaks unde