Nondestructive Assay (NDA) techniques have become powerful tools for quantitative determination of special nuclear materials (SNM), and played an important role in nuclear material control and accounting (MC &A), also in inspection of Nuclear Safeguards.

• 无损分析(NDA：Nondestructive assay)技术已经成为定量分析特种核材料(SNM：special nuclear materials)的重要工具，它在核材料控制与衡算(MC &A)方面以及在核保障核查工作中起着重要作用。