Method and device for determining flow in primary loop of reactor and computer equipment

The invention relates to a method and a device for determining flow in a primary loop of a reactor, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring the current rotating speed of a main pump in a primary loop of a reactor; determining the lift of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump, the to-be-solved flow in the primary loop of the reactor and a first lift mapping function; according to the current rotating speed, the lift of the main pump at the rated rotating speed and a first relation, the first lift of the main pump at the current rotating speed is determined, and the first relation is used for indicating the relation between the lift of the main pump at any rotating speed and the lift of the main pump at the rated rotating speed; according to the to-be-solved flow and the second lift mapping function, the second lift of the main pump at the curren