Document: NUREG-0800
Document ID: 4f141c71-35ca-4353-9047-a13efe6d56b7
Document Type: srp
Title: Revision 6 - August 2016
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1601/ML16019A308.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
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inition does not consider the consequences of failure, only the existence of failure. Robustness - The ability of a software system or component to function correctly in the presence of invalid inputs or stressful environmental conditions. This includes the ability to function correctly despite some violation of the assumptions in its specification. Safety - Those properties and characteristics of the software system that directly affect or interact with system safety considerations. The other characteristics discussed in this BTP are important contributors to the overall safety of the software-controlled safety system, but are primarily concerned with the internal operation of the software. The safety characteristic, however, is primarily concerned with the effect of the software on system hazards and the measures taken to control those hazards. Security - The establishment of a Secure Development and Operational Environment (SDOE) for digital safety systems to: (1) to prevent undocumented, unneeded, and unwanted modifications and (2) to protect against a predictable set of undesirable acts (e.g., inadvertent operator actions or the undesirable behavior of connected systems) that could challenge the integrity, reliability, or functionality of a digital safety system during operations. RG 1.152 contains guidance for SDOE. Timing - The ability of the software system to achieve its timing objectives within the hardware constraints imposed by the computing system being used. BTP 7.14-8 Revision 6 - August 2016 A.3.2.2 Definition of Process Characteristics Completeness - Those attributes of the planning documents, implementation process documents and design outputs that provide full implementation of the functions required of the software. The functions which the software is required to perform are derived from the general functional requirements of the safety system, and the assignment of functional requirements to the software in the overall system design. (See also