1.1. Experiment Research Plan

Experimental studies about passive safety characteristics for AC600/1000 ar divided the following three steps:

(1) Mechanism demonstration tests include emergency residual heat removal test through natural circulation flow of SG secondary side, core make-up tank performance test and wind tunnel test for passive containment cooling. Above three mentioned tests finished by the end of 1996.

(2) Part function demonstration tests include emergency residual heat removal test through natural circulation flow of SG secondary side and atmosphere loop and thermal hydraulic transient behavior test research during small break LOCA for core make-up tank, pressurizer, accumulator and reactor pressure vessel. Above two mentioned tests will be finished by end of this year. Meanwhile, NPIC will cooperate with Karlsruhe Technology Center of Germany to do air natural circulation flow test for AC600/1000 passive containment cooling system.

(3) Comprehensive function demonstration tests. NPIC plans to construct the following two large test facilities: a. Integral thermal hydraulic test facility. It is a tandem system of primary coolant cycle, secondary side cycle of SG and air flow cycle, which can be used to research station black out accident, small break LOCA and computer code development. b. Integral containment cooling test facility. It is used to simulate and research comprehensive characteristics of passive containment cooling system for AC600/1000.