Templates and records · UNE 73401

UNE 73401 list of safety-related items

Before controlling anything you need to know what falls within the programme. The list classifies each structure, system, component or activity and assigns its quality assurance level.

In one sentence

The list of safety-related items identifies which structures, systems, components and activities are significant in preventing accidents or mitigating their consequences, with the classification criterion applied and the quality assurance level each one receives; UNE 73401 does not name a record of this kind, but it is the usual way to define the graded scope of the programme set out in CSN guide GS-10.1.

Content reviewed on 17 October 2026

Type of information: Good practice Defines the programme’s graded scope (GS-10.1); the list format is common practice
Who fills it in: Engineering and quality assurance Engineering sets the classification; quality assurance assigns the level of control
When: At design stage or on receipt of the order Revised with every design change or reclassification
How long it is kept: Current version and its revisions The classification is part of the design documentation, which IS-24 treats as a lifetime record for the licensee

What the standard requires

What UNE 73401 demands and what it leaves to your judgement

GS-10.1 regards an item or activity as safety-related if its performance or execution is significant in preventing accidents or mitigating their consequences for the health and safety of the public and workers. The quality assurance programme applies to them.

Nuclear quality assurance criteria call for controls to be graded according to that significance. The way to show this is a documented classification: which item, which class and which quality assurance requirements follow from it.

For the licensee, the classification comes from the facility’s safety analysis. For a supplier, it arrives with the purchase order, and the supplier’s list records each item it manufactures with the class stated and the requirements that class entails.

Read it in context: Organization and quality assurance program, in the UNE 73401 Academy

Structure

Fields the template should include

Item, system or activity and its identification
Safety function it performs
Safety class and classification criterion or document
Quality assurance level assigned
Resulting requirements: design control, qualification, inspections, records
Originating order or document, in the case of a supplier
Revision and approval

Example

Example: extract from a supplier’s list

Company, people and figures are fictitious: the example only shows what a properly completed record looks like.

Field	Content
Item 1	Pipe support in the emergency cooling system · safety class per licensee order PD-4471 (fictitious)
Level 1	Design control with independent verification · qualified welding · 100% NDT · licensee hold points
Item 2	Pipe support in a non-safety-related system · commercial grade
Level 2	Manufacturer’s quality control, with no nuclear quality assurance requirements
Item 3	Anchor bolts for a safety-class support, bought as commercial grade
Level 3	Commercial grade dedication before use
Revision	Revision 3 · 2 March 2026 · following the change to the order

At the audit

Mistakes auditors commonly flag

Everything treated at the highest level, or everything at the lowest, with no real grading.
The safety class stated in the order is not carried through to the shop travellers.
Commercial grade components used in safety-class items without dedication.
Licensee reclassifications that never make it into the list.
The criterion used for classification is not written down.

In Kimobox

How this record is kept in Kimobox

1Each item is recorded with its safety class and quality assurance level.
2Safety-critical components are linked to their activities and traceability.
3The list is kept as a versioned document, with its revision and approval traceable.
4The requirements arising from each level become the records its work orders call for.

Frequently asked questions

What people ask us before getting started

What does “safety-related” mean?

According to GS-10.1, that the performance of a structure, system or component, or the execution of an activity, is significant in preventing accidents or mitigating their consequences for the public and workers.

Who classifies the items?

The licensee, based on the safety analysis of its facility. The supplier receives the classification in the order and must apply the corresponding quality assurance level.

Can a commercial component be used in a safety-related item?

Yes, through a dedication process showing that it has the characteristics needed for its safety function. GS-10.1 provides for this expressly.

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Sources

Where each figure comes from

References to the official text in force. If a standard is revised, this page is updated and the review date says so.

Guía de Seguridad GS-10.1 (Rev. 2) — Guía básica de garantía de calidad para instalaciones nucleares (Basic quality assurance guide for nuclear facilities) Consejo de Seguridad Nuclear (Spanish Nuclear Safety Council) · February 1999
UNE 73401:1995 — Garantía de la calidad en instalaciones nucleares (Quality assurance in nuclear facilities) UNE, Spanish Association for Standardisation · Edition of 19 June 1995, confirmed in 2024
10 CFR Part 50, Appendix B — Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants (an alternative accepted by GS-10.1) U.S. Nuclear Regulatory Commission · Current text