Greater-than-Class-C waste

The recommendation that generic scenarios for exposure of hypothetical inadvertent intruders should be used in classifying waste is consistent with the approach used by NRC in 10 CFR Part 61 to establish different subclasses of low-level radioactive waste that are generally acceptable for near-surface disposal (Class-A, -B, and -C waste) or are generally unacceptable for near-surface disposal (greater-than-Class-C waste). Such scenarios have not been used to... 

Requirements for Disposal and Their Relationship to Waste Classification. Under current laws and regulations, spent fuel, high-level waste, transuranic waste, and low-level waste generally do not require particular disposal systems. However, only certain types of disposal systems are authorized for some types of waste (see Table 4.1). In particular (1) spent fuel, high-level waste, transuranic waste, and greater-than-Class-C low-level waste normally are intended for disposal in a geologic repository, such as the proposed Yucca Mountain facility and the Waste Isolation Pilot Plant and... 

Some high-level radioactive waste can be less hazardous than high-activity (Class-C or greater-than-Class-C) low-level waste in regard to the levels of radioactivity due to shorter-lived radionuclides and the long-term risks that arise from disposal due to long-lived radionuclides. 

DOE (1987a). U.S. Department of Energy. Recommendations for Management of Greater-Than-Class-C Low-Level Radioactive Waste, DOE/NE-0077 (National Technical Information Service, Springfield, Virginia). 

Intermediate-level waste is waste with concentrations of radionuclides greater than NRC s Class-C limits but which does not pose a sufficient long-term hazard to justify disposal in a geologic repository. 

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