Standards Development

Scope

This International Standard describes the basic requirements for qualifying electrical equipment important to safety and interfaces (electrical and mechanical) that are to be used in nuclear facilities. The principles, methods, and procedures described are intended to be used for qualifying equipment, maintaining and extending qualification, and updating qualification, as required, if the equipment is modified. The qualification requirements in this standard, when met, demonstrate and document the ability of equipment to perform safety function(s) under applicable service conditions, including design basis events and certain design extension conditions, and reduce the risk of environmentally induced common-cause equipment failure.

This standard does not provide environmental stress levels or performance requirements.

Other aspects, relating to quality assurance, selection and use of electronic devices, design and modification of digital systems are not part of this standard.

Other IEC or IEEE standards that present qualification programmes for specific equipment, specific environments, or specific parts of the qualification programme may be used to supplement this standard, as applicable. For example:

–        IEEE Std 7-4.3.2 [2] for programmable digital devices in safety systems,

–        IEEE Std 317 [3] for electrical penetration assemblies in containment structures,

–        IEEE Std 334 [4] for continuous duty class 1E motors,

–        IEEE Std 382 [5] for safety related actuators,

–        IEEE Std 383 [6] for class 1E electric cables and field splices,

–        IEEE Std 420 [7] for control boards, panels and racks,

–        IEEE Std 535 [8] for class 1E lead storage batteries,

–        IEEE Std 572 [9] for class 1E connection assemblies,

–        IEEE Std 603 [10] for criteria for safety systems,

–        IEEE Std 627 [11] for qualification of equipment,

–        IEEE Std 628 [12] for raceway systems for class 1E circuits,

–        IEEE Std 638 [13] for class 1E transformers,

–        IEEE Std 649 [14] for class 1E motor control centers,

–        IEEE Std 650 [15] for class 1E static battery chargers and inverters.

The following IEC standards provide specific requirements and guidance on environmental and EMC testing: IEC 60068-2-6 [16], IEC 60068-2-11 [17], IEC 60068-2-14 [18], IEC 60068-2-27 [19], IEC 60068-2-30 [20], IEC 60068-2-57 [21], IEC 60068-3-3 [22], IEC 61000-4 (all parts) [23] and IEC 62003 [24]

Additionally, the following IEC and IEEE standards provide specific requirements and guidance on electrical insulation systems and materials: IEEE Std 98 [25], IEEE Std 99 [26], IEEE Std 943 [27], IEEE Std 1064 [28], IEC 60216-1 [29], IEC 60216-2 [30], IEC 60529 [31] and IEC 60544-2 [32].