Investigations of the fluctuating pressure field in the suppression pool of the Marviken containment during blowdown

From August 1972 until May 1973 blowdown tests were performed at the Marviken reactor plant. The tests were intended to provide information about the behaviour of a reactor safety containment with pressure suppression system in case of a loss-of-coolant accident resulting from a rupture in the primary circuit. Besides of experiments on the behaviour of the containment parallel experiments were conducted relative to the transport of iodine, the behaviour of components, and the tightness of the containment. Within this test program the Gesellschaft fuer Kernforschung measured the local pressure pulsation field in the water pool as well as the mass flows entering the pressure suppression system. The measurements were performed to provide first a general view of the vibration phenomena in the water pool to allow subsequent interpretation by means of physical models and processing by computation. (Auth.)