IS 15398 : 2025/IEC 60880 : 2006 Nuclear Power Plants - Instrumentation and Control Systems Important to Safety - Software Aspects for Computer-Based Systems Performing Category A Functions
NATIONAL FOREWORD
This Indian Standard (First Revision) which is identical to IEC 60880 : 2006 'Nuclear power plants - Instrumentation and control systems important to safety - Software aspects for computer-based systems performing category A functions' issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of Electronic Measuring Instruments, Systems and Accessories Sectional Committee,and approval of the Electronics and Information Technology Division Council.
This standard was first published in 2003 and was identical to IEC 60880 : 1986. This revision of this standard has been taken to align it with the latest version of International Standard IEC 60880 : 2006.
This second edition cancels and replaces the first edition published in 1986 and IEC 60880-2 published in 2000. It constitutes a technical revision.
The revision of the standard is intended to accomplish the following:
a) To take into account the fact that software engineering techniques advanced significantly in the intervening years; and
b) To align the standard with the new revisions of IAEA documents NS-R-1 and NS-G-1.3.
This includes as far as possible adaptation of the definitions
To replace, as far as possible, requirements associated with standards published since the first edition of IEC 60880, especially IEC 61513, IEC 61226 edition 2, IEC 62138 and IEC 60987.
To fully integrate IEC 60880-2 published in 2000 as chapters 13, 14, 15 and annexes G, H, I.
To review the existing requirements and to update the terminology and definitions
The text of IEC standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appears referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.