GOST R 59115.9-2021 PDF

Full title and description

GOST R 59115.9-2021 — "Rules for strength assessment of equipment and pipelines of nuclear power installations. Strength verification analysis" (Russian: «Обоснование прочности оборудования и трубопроводов атомных энергетических установок. Поверочный расчет на прочность»). This part provides the specific methods and procedures used to perform verification (design/check) strength calculations for components and piping used in nuclear power facilities.

Abstract

This national standard (GOST R) defines requirements and calculation procedures for checking the structural strength of equipment and pipelines in nuclear power installations. It sets out allowable stress concepts, approaches to determine stresses and strains (including linearization), criteria for long‑term/static strength and progressive deformation, and procedural rules for strength verification analyses used in design and reassessment of nuclear plant components.

General information

• Status: Active / in force (introduced 01 March 2022).
• Publication date: Approved 2021, introduced 1 March 2022.
• Publisher: Federal Agency on Technical Regulating and Metrology (Rosstandart) — national standard of the Russian Federation.
• ICS / categories: 27.120.99 (nuclear engineering / strength assessment of nuclear equipment and piping).
• Edition / version: Edition designated 2021 (GOST R 59115.9-2021).
• Number of pages: Approximately 113 pages (commonly listed as 113–114 pages in catalogues).

General bibliographic and status details are recorded in standards catalogues and vendor listings for GOST documents.

Scope

The standard applies to equipment and pipeline components of nuclear power installations and describes the verification (check) strength calculation procedures to demonstrate compliance with required strength criteria. It covers determination of nominal allowable stresses, procedures to compute and linearize stresses and strains, treatment of stress histories, requirements for evaluation of long‑term static strength and progressive deformation, and special provisions applicable to components operating at elevated temperatures and under complex loading histories.

Key topics and requirements

• Definitions and terms relevant to strength justification and verification analysis of nuclear equipment.
• Requirements for nominal allowable (permissible) stresses used in verification calculations.
• Methods to determine, combine and linearize stresses and strains for strength assessment.
• Procedures for handling stress histories and evaluating their effect on component integrity.
• Criteria and calculation rules for long‑term static strength and resistance to progressive deformation.
• Guidance for verification of welds, nozzles, attachments and local stress concentrations where applicable.

These key topics reflect the table of contents and clause headings found in the published part of the GOST R 59115 series.

Typical use and users

This standard is intended for structural and mechanical engineers, strength analysts, piping designers, technical experts performing fitness‑for‑service and reassessment calculations, regulatory reviewers, and nuclear plant equipment designers and operators who need to perform or review verification strength calculations for pressure‑retaining components and pipelines within nuclear power installations.

Related standards

GOST R 59115.9-2021 is part of the multi‑part GOST R 59115 series addressing justification of strength for nuclear power equipment and piping. Related parts include GOST R 59115.1 (terms and definitions), GOST R 59115.4 (long‑term strength and related provisions), and other parts in the series that deal with materials, methodologies and specific calculation rules. Users typically apply this part together with the other numbered parts of the series.

Keywords

strength assessment; verification calculation; nuclear power installations; equipment strength; pipeline strength; allowable stresses; stress linearization; long‑term strength; progressive deformation; GOST R 59115.

FAQ

Q: What is this standard?

A: GOST R 59115.9-2021 is a Russian national standard that sets out the rules and procedures for strength verification (check calculations) of equipment and pipelines used in nuclear power installations.

Q: What does it cover?

A: It covers methods for determining nominal allowable stresses, procedures to calculate and linearize stresses and strains, treatment of loading histories, criteria for long‑term/static strength and progressive deformation, and related calculation rules used to verify structural integrity of nuclear plant components.

Q: Who typically uses it?

A: Structural and mechanical engineers, piping designers, strength analysts, nuclear equipment designers, plant operators performing reassessments, and regulatory/inspection bodies reviewing strength justifications for nuclear components.

Q: Is it current or superseded?

A: The document is listed as active and was introduced into force on 1 March 2022; it is not indicated as superseded in available catalogues and vendor listings as of its introduction. Users should verify current status before relying on it for compliance or regulatory purposes.

Q: Is it part of a series?

A: Yes — it is one part of the GOST R 59115 series (multi‑part standard) that collectively addresses justification of strength for equipment and piping of nuclear power installations; other parts include clause‑and‑topic specific documents such as GOST R 59115.1 and GOST R 59115.4.

Q: What are the key keywords?

A: Strength verification calculation; allowable stress; stress linearization; long‑term static strength; progressive deformation; nuclear equipment; pipeline strength; GOST R 59115.9-2021.