What is the main function of the Defense Nuclear Facilities Safety Board (DNFSB)?

The primary role of the Defense Nuclear Facilities Safety Board (DNFSB) is to provide independent oversight concerning the safety of nuclear facilities. This means that the DNFSB is tasked with ensuring that the operations and processes at these facilities adhere to high safety standards in order to protect both workers and the public. The board assesses the safety management practices of various facilities, evaluates potential risks, and recommends improvements to enhance overall safety measures. This independent oversight is critical in maintaining safety within programs related to nuclear materials and operations.

The other options, while related to aspects of nuclear operations, do not accurately define the core responsibility of the DNFSB. The oversight of financial spending or enforcement of operational security are not among the primary functions of the DNFSB. Additionally, conducting nuclear weapon tests falls outside the remit of the board, which is focused on safety management rather than testing activities. Thus, the emphasis on independent safety oversight underscores the DNFSB's essential role in ensuring the safe operation of nuclear facilities.