Regulation 10 Operating records
In respect of each material balance area an operator must ensure that the operating records set out—
those operating data which are used to determine changes in the quantities and composition of qualifying nuclear material;
a list of inventory items, updated to the best extent possible, and their location;
the data, including derived estimates of random and systematic errors, obtained from the calibration of tanks and instruments as well as from sampling and analysis;
the data resulting from quality control measures applied to the accountancy system for the qualifying nuclear material, including derived estimates of random and systematic errors;
a description of the sequence of the actions taken to prepare for, and take, a physical inventory and to ensure that the inventory is correct and complete;
a description of the actions taken in order to ascertain the cause and magnitude of any accidental or unmeasured loss that might have occurred; and
the isotopic composition of plutonium, including its decay isotopes, and reference dates, if recorded at the qualifying nuclear facility for operational needs.
An operator must send the data referred to in paragraph (1) to the ONR within 14 days of the receipt of a written request from the ONR.