Since 2009, with support from the Sloan and Hewlett Foundation’s, the Arius Association has been working to promote regional nuclear waste repositories outside of Europe. If such repositories could be brought into existence, they would result in the centralized disposal of dangerous nuclear wastes in a manner that would be more cost-effective, safe, and secure (from both a nonproliferation and dirty bomb perspective) than if each country with a small nuclear power program had responsibility for disposing of its own high-level nuclear waste. Funds from this grant provide support for Arius’ continued work on this issue, including an expansion of the scope of their efforts to include discussion of regional repositories for radioactive wastes from universities, hospitals, and industry. Supported activities over the next two years include a series of workshops in Arab regions and in Asia; the production of a draft constitution and work program for a regional nuclear repository organization; development of an IAEA report on multinational nuclear waste repositories; and a series of high-level papers aimed at specialists and policymakers.