1.What is high-level radioactive waste? 2.What are the differences between TRU waste and HLW? 3.What options are available for HLW disposal? 4.What are the basic requirements for a geological formation used in the disposal of HLW? 5.What are the important reasons why deep geological disposal on land has evolved into the disposal method of choice for virtually every country with a nuclear power programmer? 6.What happens to HLW during disposal? 7.How can the safety of HLW disposal be assessed?  1. What is high-level radioactive waste?  2. What are the differences between TRU waste and HLW?  3. What options are available for HLW disposal?  4.What are the basic requirements for a geological formation used in the disposal of HLW?  5.What are the important reasons why deep geological disposal on land has evolved into the disposal method of choice for virtually every country with a nuclear power programmer？  6. What happens to HLW during disposal?  7. How can the safety of HLW disposal be assessed?