METHOD OF DRIVING THE HIGH PRESSURE FORM OF THE 440 MW PRESSURE WATER REACTORS

摘要

The invention relates to a method for driving the Hochdruckvorwaermsaeulen of 440-MW pressurized water reactors of the VVER-type failure of Hochdruckvorwaermer. The aim and task are to perform a plant-friendly operation of the steam generator and the Hochdruckvorwaermersaeulen in case of failure of Hochdruckvorwaermer to avoid damage processes caused by thermal stresses. This is achieved by decommissioning the HDV one hour before the load is reduced below 160 MW per turbo set in the event of scheduled decommissioning of the HDV. About a gradual throttling of the steam slide is then the feedwater side shutdown of the HDV group, so that a cooling speed of the feed water of DT Dt 1 K / min is reached. The unscheduled decommissioning of the HDV is triggered by responding to an additionally installed Hoehenstandsverriegelung, in which case first a bypass line of the HDV is opened, then increases the height in the HDV on, there is an emergency shutdown of the HDV.