1995•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
Analysis of the automatic depressurization system (ADS) tests for the AP600 design
A.J. Brockie, R.W. Carlson, T. Bueter
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Abstract
The AP600 is a Westinghouse advanced pressurized water reactor (PWR) designed with passive plant safety features that rely on natural driving forces, such as gravity, and natural circulation which allows significant simplification of the plant systems equipment and operation. As part of the passive safety concept, the AP600 utilizes an Automatic Depressurization System (ADS) to depressurize the Reactor Coolant System (RCS) allowing long-term gravity injection to be initiated and maintained for passive reflood and long term core cooling. The ADS design consists of four flow paths, two of which are connected to the top of the pressurizer and a flow path from each of the two RCS hot legs. During a postulated accident, the two flow paths from the hot legs discharge directly to containment. The two paths from the pressurizer discharge steam and/or water from the RCS into the In-containment Refueling Water Storage Tank (IRWST) through spargers located underwater where the steam is normally condensed with no increase in containment pressure or temperature. The ADS tests are one part of the planned AP600 Westinghouse test program for the passive core cooling system (PXS). The ADS tests are full-scale simulations of AP600 ADS components. The ADS tests provide dynamic performancemore » data of the ADS for use in computer code validation and design verification.« less