SIST EN ISO 10276:2021

SLOVENSKI STANDARD
oSIST prEN ISO 10276:2021
01-junij-2021
Jedrska energija - Tehnologija goriv - Ovojni sistemi za pakete, ki se uporabljajo za
prevoz radioaktivnih snovi (ISO 10276:2019)
Nuclear energy - Fuel technology - Trunnion systems for packages used to transport
radioactive material (ISO 10276:2019)
Kerntechnik - Brennstofftechnologie - Lastanschlagpunkte für Transportbehälter für
abgebrannte Brennstoffelemente (ISO 10276:2019)
Énergie nucléaire - Technologie du combustible - Systèmes de tourillons pour colis de
transport de matières radioactives (ISO 10276:2019)
Ta slovenski standard je istoveten z: prEN ISO 10276
ICS:
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
oSIST prEN ISO 10276:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 10276:2021

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oSIST prEN ISO 10276:2021
INTERNATIONAL ISO
STANDARD 10276
Second edition
2019-12
Nuclear energy — Fuel technology —
Trunnion systems for packages used
to transport radioactive material
Énergie nucléaire — Technologie du combustible — Systèmes de
tourillons pour colis de transport de matières radioactives
Reference number
ISO 10276:2019(E)
©
ISO 2019

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oSIST prEN ISO 10276:2021
ISO 10276:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

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oSIST prEN ISO 10276:2021
ISO 10276:2019(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, abbreviated terms, symbols and definitions . 1
3.1 Terms and definitions . 1
3.2 Symbols . 4
3.3 Abbreviations . 4
4 Regulatory requirements . 4
4.1 General . 4
4.2 Relevant regulations. 4
5 Design . 4
5.1 General . 4
5.2 Design methodology. 6
5.3 Materials . 6
5.3.1 Material selection . 6
5.3.2 Mechanical properties . 7
5.4 Design loads . 7
5.4.1 Assembly state . 7
5.4.2 Tie-down . 8
5.4.3 Lifting and/or tilting . . 9
5.4.4 Load cycles for fatigue analysis . 9
5.5 Methods of analysis and design criteria .10
5.5.1 General.10
5.5.2 Strength analysis using analytical methods .10
5.5.3 Strength analysis using FEA methods .11
5.5.4 Brittle fracture evaluation .12
5.5.5 Fatigue analysis .12
5.6 Other requirements and recommendations .12
6 Manufacture .13
6.1 General .13
6.2 Assembly .14
6.3 Inspection during manufacture and assembly .14
6.3.1 Dimensional and visual inspection .14
6.3.2 Non-destructive examination .14
6.4 Testing during manufacture and assembly .15
6.4.1 Scope of testing .15
6.4.2 Chemical analysis .15
6.4.3 Mechanical testing of material properties .15
6.4.4 Static testing .16
7 Maintenance .17
7.1 General .17
7.2 Maintenance schedule .17
7.3 Periodic inspection .18
7.3.1 General.18
7.3.2 Removable trunnions . .18
7.3.3 Welded trunnions . . .18
7.3.4 Trunnion surfaces .18
7.3.5 Attachment threads in packaging body .18
7.3.6 Attachment bolts . . .19
7.3.7 Feature dimensions .19
7.4 Periodic testing .19
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7.4.1 Types of testing .19
7.4.2 Trunnion system .19
7.4.3 Weld areas .19
7.5 Component replacement .19
7.6 Repairs .20
7.6.1 General.20
7.6.2 Features to be repaired and methods .20
8 Quality management system .21
Bibliography .22
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oSIST prEN ISO 10276:2021
ISO 10276:2019(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 85, Nuclear energy, Subcommittee SC 5,
Nuclear installations, processes and technologies.
This second edition cancels and replaces the first edition (ISO 10276:2010), which has been technically
revised. The main changes compared to the previous edition are as follows:
— The scope is extended to trunnion attachment components (trunnion systems are defined as being
the trunnions and their attachment components);
— The normative references have been updated (IAEA TS-R-1 replaced by IAEA SSR-6) and enlarged
to the IAEA SSG-26 (Appendix IV-1 - Package stowage and retention during transport);
— Quality Assurance is replaced by Management Systems;
— The load cases are to be defined by use of the minimum acceleration factors given in table IV-1 of the
Appendix IV of IAEA SSG-26;
— The calculation methods (analytical and finite element analysis) and the minimum associated
criteria are more precisely detailed;
— The bibliography has been updated and enlarged to the most recent recommendations, guidance
and standards as acceptable by most of the Competent Authorities;
— The structure of the document has been slightly modified to enhance its legibility and understanding.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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Introduction
This document has been produced to enable package owners, designers, users and regulatory
organizations to have at their disposal a comprehensive document covering all aspects of trunnion
systems. Experience has been drawn from the extensive knowledge of owners, designers, users
and competent authorities. This document contains the minimum requirements and makes
recommendations covering various aspects of trunnion systems.
Intermediate devices (sometimes referred to as transport frames, supports or cradles) can be used
between the packaging trunnions and the transport conveyance to support and secure the package
during transport; however, the energy-absorbing effects that may be provided by these intermediate
devices are not taken into consideration in this document.
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oSIST prEN ISO 10276:2021
INTERNATIONAL STANDARD ISO 10276:2019(E)
Nuclear energy — Fuel technology — Trunnion systems for
packages used to transport radioactive material
1 Scope
This document covers trunnion systems used for tie-down, tilting and/or lifting of a package of
radioactive material during transport operations.
Aspects included are the design, manufacture, maintenance, inspection and management system.
Regulations which can apply during handling operation in nuclear facilities are not addressed in
document.
This document does not supersede any of the requirements of international or national regulations,
concerning trunnions used for lifting and tie-down.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
IAEA SSR-6, International Atomic Energy Agency (IAEA) Safety Standard No. SSR-6, Regulations for the
Safe Transport of Radioactive Material
IAEA SSG-26, International Atomic Energy Agency (IAEA) No. SSG-26, Advisory Material for the IAEA
Regulations for the Safe Transport of Radioactive Material
3 Terms, abbreviated terms, symbols and definitions
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IAEA SSR-6 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1.1
bending stress
variable component of normal stress (3.1.10), which might not be linear across the thickness
3.1.2
bolts
fasteners including bolts, screws and studs
3.1.3
designer
organization responsible for the design of the package
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3.1.4
independent expert organization
organization administratively and managerially separate from the designers, manufacturers or owners
of the subject package, constituted of specialized experts, or an insurance organization used to verify,
oversee, witness or check
3.1.5
linearized stress
sum of the membrane stress (3.1.9) and of the linear component of the bending stress (3.1.1)
3.1.6
load case
specific configuration of transport or lifting associated to a total mass (transport or lifting), specified
value and direction of acceleration, a given number of acting trunnions, and a given point/area of
application of the load on the trunnion
3.1.7
maintenance schedule
document drawn up by the designer that gives, in appropriate detail, the applicable frequency/
periodicity of maintenance items and details of methods to be employed; applied by the owner/operator
3.1.8
maximum service load
greater of total mass (lifting) (3.1.19) and total mass (transport) (3.1.20), subjected to gravity (1 g)
3.1.9
membrane stress
component of normal stress (3.1.10) that is uniformly distributed and equal to the average stress across
the thickness of the section under consideration
3.1.10
normal stress
component of stress normal to the plane of reference
3.1.11
owner
operator
organization responsible for maintaining the condition of the packaging for transport
Note 1 to entry: The condition of packaging shall be in accordance with IAEA SSR-6.
3.1.12
peak stress
maximum stress that occurs in a component by reason of geometry, local discontinuities or local
thermal stress, including the effects, if any, of stress concentration
3.1.13
periodic inspection
inspection of the trunnion system during the in-service life of the packaging at predetermined
periodicities defined in the maintenance schedules (3.1.7)
3.1.14
primary trunnion system
trunnion system provided as a primary means for lifting and/or tilting, tie-down and supporting of
the package
3.1.15
quality plan
document, or several documents, that together specify quality standards, practices, resources,
specifications, and the sequence of activities relevant for manufacture
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3.1.16
removable trunnion
trunnion, on a package secured by non-permanent methods, e.g. bolting
3.1.17
secondary trunnion system
trunnion system provided as an additional or alternative means for lifting and/or tilting, tie-down and
supporting of the package
3.1.18
tie-down
securing of the package to the conveyance
3.1.19
total mass (lifting)
maximum mass of a package as supported by the trunnion systems during lifting, fitted with all
necessary ancillaries and equipment, and including the radioactive material and water as appropriate
3.1.20
total mass (transport)
maximum mass of a package fitted with all ancillaries (shock absorbers, neutron shields, covers, transport
frame as appropriate, etc.), as presented for transport and as supported by the trunnion systems
3.1.21
transport cycle
complete round-trip journey of a package between two complete loadings
3.1.22
trunnion
projection, typically cylindrical in shape, attached on a packaging by various means and used for
lifting, tilting and/or tie-down (3.1.18) of the package; parts permanently attached to the trunnion are
considered as being part of the trunnion
Note 1 to entry: A trunnion is an example of an attachment point as defined in IAEA SSG-26, Appendix IV.
3.1.23
trunnion attachment method
method of attaching the trunnion (e.g. welding, bolting, threaded attachment, interference fitting and
bolting, or any combination of these methods) to the packaging body
3.1.24
trunnion attachment components
attachment components, e.g. welding to the packaging body, bolts, removable shear discs, female
threads or housing in the packaging body, removable baseplates, etc., used to secure the trunnion to the
packaging body
3.1.25
trunnion system
assembly of trunnion (3.1.22) and trunnion attachment components (3.1.24)
3.1.26
welded trunnion
trunnion directly secured to the packaging by welding
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3.2 Symbols
K plane strain fracture toughness
Ic
R (T) guaranteed yield strength or guaranteed 0,2 % proof strength at the operating temperature, T
e
R (T) guaranteed minimum tensile strength at the operating temperature, T
m
T operating temperature
3.3 Abbreviations
FEA Finite Element Analysis
MT Magnetic particle test
NDE Non-destructive examination
PT Liquid penetrant test
SCC Stress corrosion cracking
UT Ultrasonic test
VT Visual inspection test
4 Regulatory requirements
4.1 General
In this document, the word “shall” denotes a requirement; the word “should” denotes a recommendation;
and the word “may” denotes permission, i.e. neither a requirement nor a recommendation. Imperative
statements also denote requirements. To conform to this document, all operations shall be performed
in accordance with its requirements, but not necessarily with its recommendations.
The word “can” denotes possibility rather than permission.
4.2 Relevant regulations
The main applicable document is IAEA SSR-6. Other relevant national or international transport
regulations should also be considered to ensure that any differences with the IAEA Transport
Regulations are taken into account.
This document does not relieve the relevant parties of the responsibility for compliance with any
[3]
requirement of the regulations applicable within the nuclear power plants (e.g. KTA 3905 or
[4]
ANSI N 14.6 ).
5 Design
5.1 General
5.1.1 Trunnion systems as part of a package design shall be designed in accordance with IAEA SSR-6
with consideration of IAEA SSG-26, and in particular its Appendix IV.
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5.1.2 Trunnion attachment to a packaging may be carried out by welding, bolting, threaded attachment,
interference fitting and bolting, or any combination of these methods. This document applies to these
methods of trunnion attachment; see Figure 1 a), b) and c).
a)  Welded trunnion b)  Removable trunnion c)  Removable trunnion
(bolted) (threaded)
Key
1 weld 5 body thread
2 trunnion 6 removable baseplate
3 packaging body 7 removable shear disc
4 attachment bolt 8 body housing
Figure 1 — Examples of trunnions
5.1.3 Trunnions are fitted to the packaging to provide the following:
— a means of tie-down of the package during transport; and/or
— a means of providing lifting, or lifting and tilting, the package (with particular designs of package,
the trunnions are used in tilting the package from horizontal to vertical position and vice-versa).
5.1.4 The designer shall consider how the package is supported during transport and lifting and/or
tilting with respect to the trunnions. For these situations the load distribution for the trunnion system
shall be derived. The designer shall consider the number of trunnions on the package required to fulfil a
particular function (e.g. lifting, tilting, supporting) and the value, the direction of forces that are imposed
on the trunnions and the way they are applied (point of application, width, angle of repartition.). See 5.4
for more details.
The load transferred by the trunnion system to the packaging body needs to be considered but is not
part of this document.
5.1.5 The design of the trunnion system shall be capable of performing for a temperature range as
defined in the IAEA Transport Regulations. In particular, minimum and maximum operating temperatures
due to design heat load and worst case ambient conditions shall be considered. Differential thermal
expansion between the conveyance means and the packaging may add stresses to the trunnion system
unless specific design arrangements are made to avoid those effects.
5.1.6 The designer should ensure that the combination of environment, component materials, bolt
coatings, bolt strength, grade, and tensile stress do not render the trunnion system vulnerable to the
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effects of stress corrosion cracking (SCC). Where the effects of SCC are not avoided by design, the designer
shall specify a regime of inspection to detect the early effects of SCC and to allow for bolt replacement
before there is damage.
5.1.7 Any trunnion systems shall be so designed that, under normal and accident conditions of
transport, the forces in those trunnion systems shall not impair the ability of the package to meet the
requirements of the IAEA Transport Regulations.
5.1.8 Specific surface finish limits shall be specified by the designer. Smooth surfaces and gradual
changes of section aid decontamination and are also beneficial for fatigue properties. Liquid traps shall
be avoided. Applying sealant or using gaskets can prevent the ingress of liquids.
5.1.9 As far as practicable, ease of decontamination shall be considered in the design of trunnion
systems, particularly with regard to the bolted a
...