scope:

This standard provides the methods of qualifying class 1E static battery chargers and inverters in accordance with IEEE Std 323-1983, IEEE Standard for Qualifying Class 1E Equipment for Nuclear Power Generating Stations. The static battery chargers and inverters discussed in this standard are Class 1E. This document, however, addresses this equipment only as a subsystem in the safety related electrical system.

The techniques and information contained in this standard may be applied to other similar electronic equipment.

The guidelines of IEEE Std 381-1977, IEEE Standard Criteria for Type Tests of Class 1E Modules Used in Nuclear Power Generating Stations, have been utilized for aging complex electronic equipment.

The reliability analysis requirements of IEEE Std 577-1976, IEEE Standard Requirements for Reliability Analysis in the Design and Operation of Safety Systems for Nuclear Power Generating Stations, and the methods described in IEEE Std 352- 1987, IEEE Guide for General Principles of Reliability Analysis of Nuclear Power Generating Station Protection Systems, have also been utilized along with statistical data.

The efforts of the working group on this standard and its appendixes will continue for the purpose of updating and disseminating more information regarding qualification techniques. The subjects of aging and the use of surveillance/ maintenance techniques to address aging will continue to be investigated, and will be among the areas considered by the working group in future revisions of this standard.

Scope

This standard describes methods for qualifying static battery chargers and inverters for Class 1E installations in a mild environment outside containment in nuclear power generating stations. The application of this equipment in the plant's electrical system is not within the scope of this standard as other industry standards, such as IEEE Std 308-1980 [9]1, IEEE Std 603-1980 [18], and IEEE Std 946-1985 [19], exist for this purpose. In addition, industry standards exist for equipment performance, such as ANSI/NEMA PE 5-1985 [3]. Performance requirements are not specified in this standard.