Cavern repository and disposal method for mixed and partitioned stacking of low and intermediate level waste packages

Abstract

The invention discloses a rock cave disposal storehouse for stacking mixed and partitioned low and intermediate level waste packages. Waste container steel boxes are stacked inside the lining silo, and the low surface dose rate steel box is arranged outside the inner cavity of the lining silo. On the top and bottom, each row of the first high surface dose rate steel box and each row of the second high surface dose rate steel box are arranged at intervals on the same horizontal plane, the first high surface dose rate steel box and the second high surface dose rate steel box Adjacent upper and lower positions are set at intervals. The invention also discloses a cavern disposal method for stacking low and intermediate level waste packages in mixed zones. The steps are as follows: 1. Build a lining silo and prepare waste container steel boxes; 2. Stack the low surface in the lining silo Dose rate steel boxes and high surface dose rate steel boxes; 3. Stack low surface dose rate steel boxes on top of high surface dose rate steel boxes. The invention can not only ensure the stability of the stacking structure and the maximization of the disposal capacity, but also prevent the accumulation of dosage, and can be widely used in the field of nuclear power.

Description

Technical field [0001] The invention relates to nuclear power technology, in particular to a cavern repository and a disposal method for the mixed partition stacking of low- and intermediate-level radioactive waste packages. Background technique [0002] Regarding the low- and intermediate-level radioactive solid waste generated from the operation and decommissioning of nuclear power plants, a common domestic practice is to conduct near-surface disposal. According to the new radioactive waste classification standards promulgated by the IAEA in 2009, it recommends that intermediate-level waste, especially long-lived low- and intermediate-level waste, be disposed of at a greater depth. Compared with relevant domestic regulations, it can be tens of meters underground. Cavern type disposal. At present, there have been built cavern-type disposal sites abroad, and relevant research and preparation work are underway in China, and the design and construction are planned during the 13th ...

AI Technical Summary

Problems solved by technology

[0004] Domestic near-surface disposal also has the form of mixed stacking. Packages with a large surface dose rate are stacked at the bottom, and packages with a small dose rate are covered above. However, concentrated stacking of packages with a large surface dose rate will cause dose accumulation and heat release rate. The increase will have a greater impact on personnel protection and barrier materials during the 300-500-year disposal period; the mixed stacking form of foreign cavern repositories does not consider the cumulative effect and the impact on barrier materials

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