使用盐穹顶储存核废料被认为是在美国和德国。这两个国家有可能合适的盐穹顶。[* *因素有利于盐穹顶* *][1](引用)的教派12:-盐在美国已经开采的穹顶。留下的空洞提供减少核废料储存的成本。生产空洞吸收企业的成本开采盐的沉积。核废料的处理实体花更少的钱少挖洞。——盐沉积地质稳定,存在了数百万年。,所以在美国,矿床的地质背景也是安全的。盐穹顶在区域地震活动性较低。——在层状盐沉积物上覆地层石灰石和白云石等提供truss-like支持表土。 The possibility of roof collapse causing the release of radioactive materials stored under these conditions appears very small but merits verification. - Salt is a good thermal conductor and will supposedly dissipate the heat from the nuclear waste. I would be more comfortable with this reason if the containers of nuclear waste were placed directly into specially sized holes within the salt domes, where the containers are in maximum direct contact with the salt. If the containers of nuclear waste are simply placed in within the air space of the underground chamber the waste must first heat the air which then heats the walls of the salt chamber. The dissipation of heat takes longer. - Salt domes are only secure if they are mined by mechanical means: drilling and blasting or grinding. Salt domes mined by aqueous methods - dissolving the salt with water and removing the salt as brine produces underground chambers with no internal support, such as pillars or human installed rock or cable bolts which reinforce the walls and ceiling of underground chambers. Such chambers would be unsuitable and could be prone to collapse. **Issues with using salt domes** to store nuclear waste: - Salt is generally regarded as being self healing. Any small cracks that may develop within the salt deposit will close. This applies to small cracks, but may not apply to very large cracks. - Salt domes are generally considered to inhibit the flow of fluids through them. However,under conditions of high temperature and pressure, as exists deep underground, [salt can become more porous][2] allowing more fluids to pass through it. This can be problematic if in flowing water was to pick up radioactive material and start spreading it around the region of the salt dome. - The nature of the nuclear waste to be stored needs to be considered. Salt domes would be better at storing solid waste. Some waste is liquid which can more easily contaminate storage area via leaks and spills. Such waste would need to be thickened so it contained 35 percent solids. - If high level nuclear waste is to be stored, the amount of heat generated would be 1 - 3 Btu/h per US gallon (278.7 - 836.1 J/L). An acre-foot (1233.48 m3 of such waste would produce 1 MBtu per hour (1055 MJ per hour). The equivalent of burning 700 lb (317.5 kg) of coal. [1]: https://www.ncbi.nlm.nih.gov/books/NBK208696/ [2]: https://www.popsci.com/storing-nuclear-waste-in-salt-deposits-isnt-as-secure-as-youd-think/