1-1/2-loop semiscale isothermal test program: program and system description in support of experiment data reports

Abstract

The isothermal test series is part of the Semiscale Blowdown and Emergency Core Cooling (ECC) Project conducted by Aerojet Nuclear Company for the U. S. Atomic Energy Commission. The test series consisted of ten blowdown tests and five hot-wall tests with emphasis on emergency core coolant delivery. The blowdown tests were conducted to investigate the effects of lower plenum geometry, heat transfer configuration, ECC injection location, downcomer gap size, and break size. The hot-wall tests were conducted to investigate the effects of residual vessel wall heat on ECC delivery after blowdown was completed. The test system included a pressure vessel with internals; an operating loop with steam generator, pump, and pressurizer; a.blowdown loop with rupture assembly, simulated pump, and simulated steam generator; a pressure suppression system with suppression tank and header, and a simulated ECC system with accumulators and injection pumps. The isothermal test program, 1-112-loop semiscale system, experimental instrumentation, operating procedures, and test conditions are described in this report to provide a reference document for support of ,the data reports specific to one or more of the isothermal tests. Presented are descriptions of the test program, test apparatus, instrumentation, operating procedures,.and test conditions.