PNAE G-7-010-89 PDF

Full title and description

PNAE G-7-010-89 — "Equipment and Pipelines of Nuclear Power Installations. Welded Joints and Surfacing. Rules for Control." This regulatory-methodical document sets out rules, methods and acceptance criteria for control (including nondestructive and destructive methods), sampling, documentation and personnel attestation related to welding and surfacing of equipment and piping for nuclear power and related installations.

Abstract

PNAE G-7-010-89 provides unified, mandatory-for-design guidance on selection of control methods, required volumes of inspection, acceptance criteria for defects and procedures for documenting results for welded joints and surfaced (clad) parts of reactors, power plant equipment and associated piping. It covers visual, dimensional and nondestructive methods (radiographic, ultrasonic, magnetic-particle, liquid penetrant, leakage testing, etc.), sampling and metallographic checks, and requirements for personnel and equipment used in control operations.

General information

• Status: Withdrawn; superseded by more recent federal rules (see replacement: НП‑105‑18).
• Publication date: Approved 11 May 1989; introduced into force 1 June 1990 (entry-into-force date).
• Publisher: Approved by Gosatomenergonadzor (State authority for nuclear supervision, USSR); later overseen in Russia by Gosatomnadzor / Rostekhnadzor in regulatory practice.
• ICS / categories: 27.120 (Nuclear power engineering); 19.100 (Non‑destructive testing); 77.040 (Testing of metals) — relevant classification areas.
• Edition / version: Original designation PNAE G-7-010-89 with recorded amendment(s) (change No.1 / late‑1999 amendment noted in bibliographic records).
• Number of pages: Approximately 77 pages (typical electronic copies and library records).

Scope

The rules apply to welded joints and surfacings (claddings) of equipment and pipelines of atomic energy installations (nuclear power plants, research reactors and related facilities) for which the general PNAE equipment-and-pipelines rules apply. The document prescribes which methods of control are to be selected by the design/engineering organization, permitted volumes of control (100% and various sampling rates), and special provisions for inaccessible zones and equipment of single/first-of-series units requiring coordination with lead materials organizations.

Key topics and requirements

• Classification of welded joints and surfacings by safety category and assignment of required inspection volumes (100% versus sampling rates).
• Accepted control methods and modalities (radiographic, ultrasonic, magnetic-particle, liquid penetrant, leak testing, visual and dimensional checks, metallographic examinations).
• Acceptance criteria for discontinuities and indications by method and by joint/category (tolerance tables and allowable flaw sizes/sums).
• Requirements for qualification/attestation of inspectors and personnel, and for equipment, film processing and sensitivity calibration (radiography specifics included).
• Procedures for sampling, preparation of control test welds, thermal treatment and metallurgical checks of welding/filler materials.
• Documentation, reporting and recordkeeping rules for non‑destructive and destructive control results.

Typical use and users

Used historically by nuclear design institutes, equipment manufacturers, welding shops, NDT laboratories, plant constructors and in‑service inspection teams engaged in manufacture, assembly and pre‑commissioning of nuclear equipment and pipelines. Engineers, welding technologists, NDT specialists and quality-control/assurance personnel used the document as a normative reference when designing inspection programs and acceptance procedures.

Related standards

Modern Russian practice replaces or complements PNAE G-7-010-89 with federal norms and rules such as НП‑105‑18 ("Rules for control of metal of equipment and pipelines at manufacture and assembly") and various GOST/ГОСТ‑R and NP documents addressing conformity assessment and specific NDT methods (for example, ГОСТ Р 50.05.01-2018 and NP‑089‑15 / NP‑104‑18 family where applicable). Legacy PNAE G-7 series documents (for welding and welding control) are closely associated (e.g., PNAE G-7-009-89, G-7-017-89, G-7-019-89).

Keywords

welded joints; surfacing/cladding; nuclear power; nondestructive testing (radiographic, ultrasonic, MT, PT); leakage testing; acceptance criteria; welding materials; inspector attestation; PNAE; NP‑105‑18.

FAQ

Q: What is this standard?

A: PNAE G-7-010-89 is a Russian/Soviet regulatory-methodical document titled "Equipment and Pipelines of Nuclear Power Installations. Welded Joints and Surfacing. Rules for Control" that established inspection rules and acceptance criteria for welds and surfacings on nuclear equipment and piping.

Q: What does it cover?

A: It covers required inspection methods (visual, dimensional, radiographic, ultrasonic, magnetic-particle, penetrant, leak testing, metallography), sampling/volume rules, acceptance levels for discontinuities, requirements for welding/surfacing materials control, and documentation and personnel attestation procedures.

Q: Who typically uses it?

A: Nuclear designers, plant manufacturers, NDT and QA/QC teams, welding technologists and constructors involved in manufacture, assembly and commissioning of nuclear power plant equipment and piping historically used the document as a prescriptive reference.

Q: Is it current or superseded?

A: It has been withdrawn from application in Russia (documents recognizing a number of PNAE G-7 items as not subject to application were issued in late 2018) and has been effectively superseded by newer federal norms such as НП‑105‑18 (effective from 1 January 2019) and related GOST/NP documents; users in current Russian practice should follow the replacement NP and GOST requirements.

Q: Is it part of a series?

A: Yes — it belongs to the PNAE G-7 family of documents dealing with welding, surfacing and control of equipment and pipelines for atomic energy installations (e.g., PNAE G-7-009-89, G-7-017-89, G-7-019-89 and other related PNAE G-7 documents).

Q: What are the key keywords?

A: Welded joints; surfacing/cladding; nuclear equipment; nondestructive testing; radiography; ultrasonic testing; magnetic-particle testing; liquid penetrant testing; leak testing; acceptance criteria; inspector qualification; NP‑105‑18; PNAE.