hazardous material storage containers are used at the oak ridge y-12 plant for safely storing and/or transporting hazardous material products. figure 1 is a picture of the complete hazardous material storage container system. because of the adverse consequences associated with one of these containers leaking or releasing some or all of its contents into the environment, it is very important that methods exist for verifying the quality and integrity of each hazardous material storage container. non-destructive tests that are conducted prior to and during the assembly process, serve to certify the quality and functionality of each container. as in many new operations, the appropriate equipment or methods do not always exist to implement the mandatory (nondestructive) evaluation(s), and development work is required. in this case, an informal request was made to devise a nondestructive method (either quantitative or qualitative) that could quickly verify whether or not the interior surface finish of the valve flange on hazardous material container tops was adequate. as a result of the advances in fiberoptic technology, a fiberoptic borescope inspection system can now be used to inspect parts or areas of parts that were, just a few years ago, considered un-inspectable. a fiberoptic borescope system can also be used to complement mechanical inspection equipment that has trouble extending into deep narrow orifices, such as the hazardous material container top's valve flange. a fiberoptic borescope system produces reliable qualitative results, which, if necessary, can be quantified