PNAE G-7-002-86 PDF

Full title and description

PNAE G-7-002-86 (ПНАЭ Г-7-002-86) — "Rules (norms) of strength calculation for equipment and pipelines of nuclear power plants". The document establishes methods, formulas and requirements for strength, stability, fatigue and fracture resistance assessments of pressure equipment and piping used in nuclear power installations.

Abstract

This regulatory technical standard specifies calculation rules for selection of main dimensions and for strength verification of equipment and pipelines of nuclear power plants. Topics include static strength, stability, cyclic (fatigue) strength, resistance to brittle fracture, long-term (creep/aging) strength, progressive deformation, seismic and vibration loads, and methods for determination of mechanical properties and test procedures required to support strength assessments. The standard is used both for design-by-rule checks and for prescriptive verification methods in design, manufacture, installation and operation of nuclear plant components.

General information

• Status: Active / in force (document widely referenced in Russian nuclear technical practice).
• Publication date: Approved 1986; brought into force 1 July 1987; published edition (revised/expanded) issued in Moscow, 1989.
• Publisher: Госкомитет СССР по надзору за безопасным ведением работ в атомной энергетике (approved by the state commission); published by Энергоатомиздат (Moscow) in the printed edition.
• ICS / categories: ICS 27 — Energy and heat transfer engineering; specifically 27.120 (nuclear energy engineering) — nuclear power plants, pressure equipment and piping.
• Edition / version: Original designation ends with "-86" (approved 1986); principal edition associated with 1987 entry into force and a Moscow edition issued in 1989 (supplemented and reworked edition noted in library records).
• Number of pages: Approximately 520–530 pages in published editions (library catalogues list 527 pages for the Moscow edition).

Key bibliographic/catalog sources for the above: national library and standards catalog records and commercial standards catalogues.

Scope

PNAE G-7-002-86 applies to strength calculations for primary equipment, pressure vessels, heat exchangers, steam generators, reactor internals (where applicable), and and to power-plant piping systems that are designed, manufactured, installed and operated under the Rules for nuclear power installations. It sets mandatory calculation procedures and recommended appendices for designers and engineers addressing static loading, thermal stresses, seismic and dynamic loads, cyclic loading and fatigue evaluations, brittle fracture assessment and long-term strength (including procedures for tests used to establish material characteristics). The standard is intended for both new design and for strength assessments during operation (inspection, assessment, repair decisions).

Key topics and requirements

• Selection and verification of main geometric dimensions for equipment and piping.
• Static strength calculations under pressure and thermal loads.
• Stability (buckling) assessment for shells, vessels and piping components.
• Cyclic (fatigue) strength methods and damage accumulation rules for repeated-loading regimes.
• Resistance to brittle fracture and procedures for fracture-mechanics assessments (including use of material toughness data and surveillance specimens).
• Long-term strength and progressive deformation (creep/aging) evaluation methodologies.
• Seismic and vibration loading rules and vibration-resistant design checks.
• Defined methods for mechanical-property testing and acceptance tests (material tensile, impact, toughness and other test procedures used to establish input data).
• Prescriptive formulae and safety factors for design-by-rule checks and guidance for where analysis-by-calculation (FEM/design-by-analysis) is required or preferred.

The items above summarize the principal technical requirements and calculation areas treated in the standard.

Typical use and users

Primary users are nuclear design organizations, pressure-equipment and piping designers for nuclear power plants, plant operators and maintenance/inspection teams, regulatory bodies and independent assessment organizations, as well as research institutions conducting structural and fatigue analyses for reactor plant components. The standard is commonly referenced in engineering calculations, safety analyses, inspection reports and regulatory submissions within the Russian / post‑Soviet nuclear sector.

Related standards

PNAE G-7-002-86 is part of the PNAE (rules and norms in nuclear power) family and is commonly used together with other PNAE/G-7 series documents (examples include PNAE G-7-010-89 on welded joints and inspection rules and other G-7 documents governing testing, welding, mounting and safety practices). It is also applied alongside national regulatory guidance and specialised method documents (RD/РД series) for assessment of piping condition and residual life.

Keywords

strength calculation, pressure equipment, nuclear power plants, piping, fatigue, cyclic strength, brittle fracture, seismic loading, vibration, material testing, PNAE, Энергоатомиздат, design-by-rule

FAQ

Q: What is this standard?

A: PNAE G-7-002-86 is a Russian (USSR-origin) technical regulatory document that defines rules and methods for strength calculations of equipment and pipelines used in nuclear power installations.

Q: What does it cover?

A: It covers selection of main dimensions and strength verification procedures including static strength, buckling, cyclic (fatigue) strength, brittle-fracture resistance, long-term strength and procedures for seismic and vibration loads, plus methods for mechanical-property testing used as inputs to calculations.

Q: Who typically uses it?

A: Designers and engineers of NPP equipment and piping, plant operators, inspection and certification bodies, regulators and researchers working on structural integrity and lifetime assessment for nuclear plant components.

Q: Is it current or superseded?

A: Catalog and library records list PNAE G-7-002-86 as an active document in use; however, national regulatory practice can evolve and some PNAE/G-7 items have later replacements or related NP/РД documents for specific topics — users should verify the currently required normative references with their national regulator or authoritative standards catalogue before relying on a specific clause.

Q: Is it part of a series?

A: Yes — it belongs to the PNAE (Правила и нормы в атомной энергетике) G-7 series of norms for equipment and piping; many G-7 documents address complementary topics (welding, nondestructive testing, mounting and safety rules).

Q: What are the key keywords?

A: Strength calculation, fatigue, brittle fracture, seismic loads, vibration, pressure equipment, nuclear power plants, material testing, piping, PNAE.