Water-based recirculation system RSR

Changjiang 1, taking Qinshan 2 as reference, is equipped with two 650 MW pressurized water reactors. SEC-KSB provided 4 RSRs and shall perform all the maintenance service work for Changjiang1. Ø 100% tightness 100% l Improved 3 mechanical seals (double-redundant) plus 2 standstill seals to withstand the SBO condition Ø Integrity under upset conditions l Cooling of mechanical seals through thermosyphon effect l Newly-developed Passive Thermal Control Valve to ensure integrity of primary loop through closing control leakage line in several minutes without any supply of power or nitrogen under SBO condition Ø Operational safety l Medium-lubricated guide bearing Ø Perfect rotor alignment l Through Hirth-type serration of connections Ø Optimized hydraulics l Tailor-made impeller/diffuser combination l Model and full-load performance tests