U.S. Department of Energy / U.S. Nuclear Regulatory Commission
Nuclear Materials Management & Safeguards System
The action code identifies the type of activity being reported in a transaction. The Action Code  table shows the valid action codes.
Nature of Transaction (TI) Code
The financial code signifies the nature of the financial or contractual activity that is involved in the transaction. The Nature of Transaction (TI) Code  table shows the valid action codes.
The obligation code identifies the country of obligation of the nuclear material being reported in a transaction. The Obligation Code  table shows the valid country of obligation codes.
Type of Inventory Change/Use Code
The type of inventory change/use code (UC) identifies the category assigned to represent the type of inventory change on the Material Balance Report, DOE/NRC Form 742. The Type of Inventory Change/Use Code  table shows the specific code which applies to a given type of inventory change.
NMMSS is sponsored by the National Nuclear Security Administration's (NNSA) Office of Materials Integration within the U.S. Department of Energy and the U.S. Nuclear Regulatory Commission