An arrangement for blocking/unblocking a fluid flow comprises: a component delimiting a fluid passage to conduct a fluid from a high pressure side to a low pressure side; a bursting disk at least indirectly attached to the component and separating the high and low pressure sides to close the fluid passage; a support element on the low pressure side, which supports the bursting disk to withstand a fluid pressure on the high pressure side that exceeds a nominal bursting pressure of the bursting disk but that is lower than a maximum pressure; and a controllable actuator actuatable for unblocking the fluid passage. To unblock the fluid passage, the actuator is arranged to destroy or damage the support element such that a fluid pressure on the high pressure side of the bursting disk exceeding the nominal bursting pressure causes the bursting disk to burst.