Assumptions made in the analyses

Assumptions made in any analysis required for design verification should be included in the documentation of that analysis. Each assumption should be stated and justified. 

The purpose of the I C system documentation is (1) to provide the means of communicating information between the various phases of and the various parties involved in Ihe design process (2) to provide a record that shows that the requirements have been correctly interpreted and fnlfiUed in the installed system (3) to communicate operationally essential design related information to the plant operators and (4) to provide a fonndation for plant maintenance and for potential future revisions to the design. 

The design of an I C system important to safety should be fuUy documented by the time it is completed. Documentation should be comprehensive, complete, traceable and verifiable in order to demonstrate the required functionality and dependability of the system. Adequate documentation will facilitate future modification or modernization of the system. 

At the conclusion of the I C system design, the final design documentation should include a listing of the relevant documents for design, design verification and design validation, and should contain specific references to those documents. 

Documentation for the I C system should be kept up to date and any modification of the system should be reflected in the documentation. All documents for the I C system should be maintained under configuration control. 

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