Preliminary Design of KALIMER-600 PDRC Performance Test Facility

The PDRC (Passive Decay Heat Removal Circuit) is the only safety-grade decay heat removal system in KALIMER-600. The core decay heat after a reactor trip is removed by natural circulation of the PDRC loop and the reactor vessel inside. The PDRC comprises of two independent loops, and each loop is equipped with a DHX (sodium-sodium Decay Heat eXchanger), an AHX (sodium-Air Heat eXchanger), and the pipes connecting the DHX and the AHX. For a verification of the passive decay heat removal concept and an assessment of the system performance, the PDRC performance test was planned for. In the test, the natural circulation cool-down capability after a reactor trip will be investigated for the conservative accident condition such as a station blackout. This paper briefly introduces the preliminary design parameters of the major components which were produced as a first step to assess the appropriateness of the test facility