Input is being simplified to the level where operators are required to select which measurements are required, approval of movements in support of the double contingency analysis, and approval of measurement data. The second, or external, drive is configured for external read access. Data is collected on the primary hard drive and upon measurement completion, it is authenticated via a public key encryption technique and written to the external drive. The data file contains the original data in an unencrypted format with an encryption tag appended to it. In the IAEA integrating computer system the encryption tag is checked, along with the data, to verify the data has not been tampered with.
Computer control is based on a four tier concept.
The first tier is facility control room software, which is includes control operator interface. Operator input is then passed to the AM area integrating computer, a virtually transparent system to the operator. It is this second tier where control and systems integration of data occurs for the AM area and second measurement room. The digital outputs are read by the measurement systems' computers and appropriate data measured. Upon data collection completion, the data is written to an external drive.