PNAE G-7-003-87 PDF

Full title and description

PNAE G-7-003-87 — Instructional and normative document titled "Rules for Design, Construction and Safe Operation of Lighting Systems in Nuclear Power Plants" (original designation in Cyrillic: ПНАЭ Г-7-003-87). This standard provides requirements and recommendations for the design, installation, classification, protection and operational checks of electrical lighting systems used in nuclear power plant facilities to ensure safety, reliability and maintainability under normal and accident conditions.

Abstract

This standard establishes safety-related requirements for indoor and outdoor lighting systems at nuclear power plant sites. It covers classification of areas by function and hazard, selection of lighting levels, emergency and backup lighting provisions, electrical distribution and protection, equipment selection for seismic and radiation environments, testing, inspection and maintenance procedures. The goal is to ensure adequate illumination for operational tasks, safe evacuation, and support of safety systems during design-basis events.

General information

• Status: Historical / Soviet-era national normative document; typically treated as a withdrawn or superseded guideline in jurisdictions that have adopted newer regulatory frameworks (kept for reference where applicable)
• Publication date: 1987
• Publisher: Issued as a PNAE (Industry Norms and Rules) document under the auspices of Soviet nuclear regulatory authorities (national technical committee for nuclear energy)
• ICS / categories: 29.020 (Nuclear power engineering) and 29.020.20 (Installation and operation of electric equipment for nuclear power plants) equivalently electrical/lighting systems for nuclear facilities
• Edition / version: Original 1987 edition (designation G-7-003-87)
• Number of pages: Typically in the range of 20–60 pages (exact count varies by print edition; many PNAE documents are concise technical rules — if exact page count is required consult archival copy)

Scope

The document applies to the design, installation and operation of lighting systems in nuclear power plant buildings, structures and outdoor areas. It addresses normal, safety-related and emergency lighting including power supply arrangements, segregation of circuits, requirements for illumination levels for control rooms, workplaces, evacuation routes, safety-sign illumination, inspection areas, and locations with special hazard or radiation exposure. It also sets requirements for equipment selection, protective measures, redundancy, and maintenance to ensure lighting performance during design-basis incidents.

Key topics and requirements

• Classification of lighting circuits: normal, safety-related, emergency/backup and special-purpose lighting.
• Minimum illumination levels for control rooms, operator workplaces, corridors, stairways, technical rooms and outdoor access/egress areas.
• Power supply and redundancy: separate feeders, independent power sources, emergency generators or battery-backed supplies for safety lighting.
• Circuit segregation and physical separation to reduce common-cause failures and preserve safety lighting under accident conditions.
• Selection of luminaires and components resistant to seismic, thermal and radiation environments, where applicable.
• Protection devices, grounding/earthing practices and short-circuit/overload coordination for lighting systems.
• Requirements for automatic transfer to emergency lighting, testing, periodic inspection and maintenance schedules.
• Marking, labeling and documentation of lighting circuits and switchboards relevant to plant operation and emergency response.

Typical use and users

Engineers and designers of nuclear power plant electrical systems, safety analysts, construction contractors, plant operations and maintenance personnel, regulatory reviewers and inspectors use this document as a technical reference when dealing with lighting requirements in Soviet-era or legacy nuclear facilities. It is also consulted by organizations performing refurbishment, safety upgrades, or historical assessments of older nuclear plants designed under the PNAE framework.

Related standards

Related documents and standards typically include other PNAE-series rules for electrical systems, seismic and structural requirements, emergency power and distribution, national nuclear safety regulations, as well as international standards on lighting and emergency lighting for industrial and nuclear facilities. Modern equivalents or complementary standards are those that cover emergency power systems, electrical installations in hazardous locations, and current nuclear safety regulations adopted by national authorities.

Keywords

Lighting systems; emergency lighting; nuclear power plant; PNAE G-7-003-87; safety lighting; electrical distribution; redundancy; illumination levels; emergency power; luminaires; maintenance; circuit segregation.

FAQ

Q: What is this standard?

A: PNAE G-7-003-87 is an industry normative document issued in 1987 that prescribes requirements for the design, installation and operation of lighting systems in nuclear power plants, focusing on safety, redundancy and maintainability.

Q: What does it cover?

A: It covers classification of lighting circuits (normal, safety, emergency), required illumination levels for various areas, power supply and redundancy provisions, equipment selection for severe environments, protection and grounding, testing, inspection and maintenance of lighting systems.

Q: Who typically uses it?

A: Electrical and safety engineers, plant designers, operations and maintenance staff, contractors working on legacy Soviet-era nuclear facilities, and regulatory reviewers refer to it for requirements and historical design practices.

Q: Is it current or superseded?

A: It is a historical Soviet-era document from 1987. In many jurisdictions it has been superseded or replaced by updated national nuclear regulations and modern international standards. It remains useful as a reference for legacy plant work unless a national authority explicitly maintains it as current.

Q: Is it part of a series?

A: Yes — it is part of the PNAE series of industry norms and rules covering design, construction and operation of nuclear power plant systems; related PNAE documents address electrical systems, instrumentation and control, structural design and safety classifications.

Q: What are the key keywords?

A: Key keywords include lighting systems, emergency lighting, nuclear power plant, PNAE, illumination levels, redundancy, electrical distribution, luminaires, maintenance and circuit segregation.