Simplified pipeline equipment room overall critical safety analysis method

Abstract

The invention relates to an integral critical safety analysis method for a simplified pipeline equipment room, which belongs to the technical field of nuclear critical safety analysis, and comprises the following steps: screening all pipelines of an equipment room to be analyzed according to media in the pipelines, screening out pipelines containing fissile material solution as effective pipelines, and calculating the total volume of feed liquid in the effective pipelines; a simplified pipe bundle model is established, and all pipelines are closely arranged according to the minimum arrangement interval; keeping the total volume of the material liquid of the tube bundle model unchanged, and changing the number and height of the tube bundle model to obtain the tube bundle size with the maximum reactivity of the simplified tube bundle model; the simplified tube bundle model with the maximum reactivity is tightly attached to the side of the equipment with the maximum reactivity in the equipment chamber in a mode of maximum interaction. The method provided by the invention is simpler and more convenient than the process of finely establishing the pipelines one by one, the calculation and analysis efficiency is improved, and the problem that the calculation result exceeds the critical safety acceptance criterion due to the fact that the pipeline feed liquid is simply gathered and excessively conservative is avoided.

Description

technical field [0001] The invention belongs to the technical field of nuclear criticality safety analysis, in particular to a method for simplifying the overall criticality safety analysis of a pipeline equipment room. Background technique [0002] When processing fissile materials in solution state, pipelines are often used to transfer the feed liquid of fissile materials between various processing equipment. Because the facilities for processing fissile materials in solution state often have complicated process flow and high concentration of fissile materials, The number of pipelines arranged in the equipment room is also large, and the total amount of material and liquid is also huge. The overall criticality safety of the equipment room containing pipelines has become a key issue that cannot be ignored. The overall criticality safety analysis of the equipment room must consider the impact of these pipelines on criticality safety. . The pipeline layout of the equipment r...

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Problems solved by technology

However, at present, there is no method for the overall criticality safety analysis of pipelines in equipment rooms of spent fuel reprocessing plants in China.

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