This category is for sites concerned with the criticality accident that happened on September 30, 1999 in the Tokaimura nuclear fuel processing plant, Japan, when a combination of human errors and breaches of the approved safety guidelines resulted in a limited uncontrolled nuclear chain reaction, or nuclear criticality, triggering the emission of radiation and the release of radioactive material into the air in the facility.
Sites expressing general concern about nuclear power, nuclear energy, nuclear materials or nuclear weapons should be listed in Society/Issues/Environment/Nuclear or related categories. Before submitting a site, be sure to read the category description. Please submit to an appropriate subcategory, if one is available. Otherwise, submit here. Failure to submit to the most specific appropriate category can delay the consideration of your submission. For more information, please refer to the DMOZ Science FAQ.