Final answer:
Due to the complexities involved in managing nuclear waste and the political difficulties with siting permanent repositories, certain countries may not prioritize the establishment of underground laboratories for study. Specifically, countries like Germany and Japan planning to phase out their nuclear programs, and the United States lacking a permanent disposal facility, are indicative of the challenges in investing such infrastructure.
Step-by-step explanation:
The main answer to the question regarding countries that do not have active underground laboratories for the study of nuclear waste storage issues is not straightforward, as it requires an up-to-date database on nuclear facilities which is not provided in the reference information. However, based on the information given, countries with a diminishing nuclear program, like Germany and Japan, or those with political challenges, may be less likely to invest in such costly and politically sensitive infrastructure. Countries like the United States, while having nuclear capabilities, currently lack a permanent disposal facility for high-level radioactive waste.Explanation in more than 100 words: It's essential to understand that managing nuclear waste is a significant challenge due to the risk of environmental contamination and the political difficulties in siting permanent waste repositories. Options such as underground salt domes are being considered, but numerous hurdles remain. Countries that are phasing out or reducing their nuclear energy programs might not prioritize the development of underground laboratories and could rely more on temporary solutions like spent fuel pools and dry storage containers. Additionally, technical complexities and the risk of nuclear proliferation add further opposition to new advancements in waste management.Conclusion: While identifying specific countries without active underground nuclear waste study labs requires further research, it is evident that geopolitical, environmental, and technical factors greatly influence a country's capacity and willingness to pursue permanent nuclear waste disposal solutions.