Recording system for historical data

A capabihty should be provided for recording, storing and retrieving data from important plant processes which record the performance and history of behaviour of the plant. Such systems for historical data typically support the following  

Traditionally, hard copy systems (paper printonts of data) have been used for these functions. However, the use of computer based systems should be considered because they facihtate more efficient storage, retrieval and processing of the large amounts of data which are typically involved. Generally, with computer based systems, conveniently located printers shonld be provided so that the users may print out hard copies. 

Terminals for accessing historical information should be situated in and around the main control room, as appropriate. Remote terminals, conveniently situated for the use of engineering support personnel, are useful and should also be considered. In deciding upon the location of terminals and the design of the human-machine interfaces for accessing historical data, attention should be paid to the needs, duties and capabilities of the users. 

The engineering of a nuclear power plant is a complex activity involving many technical disciplines. Correct information is necessary at appropriate times in a project, for each discipline, to ensure that the design is delivered as required. For systems important to safety, a structured development process embodying conservative design 

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