Method and device for monitoring the power rise during startup of a nuclear reactor (diversitary excursion monitoring)
AssigneeFramatome ANP GmbH
InventorJoachim Schulze
Life of this patent
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Abstract
A method and a device are provided for monitoring a power rise during startup of a nuclear reactor (diversitary excursion monitoring). In order to be able to shut down the reactor during startup in the event of prompt critical states, a power band situated in a lower measuring range is prescribed for a signal of power range channels which detects the reactor power in the power range. Startup is continued only when the signal does not exceed an upper limit within a minimum time, after the last occasion of exceeding a lower limit of the power band.
Claims24
A method for monitoring a power rise during startup of a nuclear reactor, which comprises:
- detecting power of a nuclear reactor in power range channels with measuring signals;
- and
- monitoring at least the measuring signal of one power range channel during the startup of the nuclear reactor to initiate a countermeasure, using a logic circuit, when a range between a lower limit and an upper limit of a power band in a lower part of a measuring range of the power range channel is traversed more quickly than a prescribed minimum time due to an excursion.
Dependencies are inferred from the claim text.