PDF generated on 11-Jan-2011

Guideline (not under Configuration Control)

Cryogenic Handbook

This document provides guidance, reference, specific information, requirements and instructions on all of the ITER cryogenics components.

Approval Process Name Action AffiliationAuthor Serio L. 10-Dec-2010:signed IO/DG/DIP/CEP/PED/CSECoAuthorReviewers Stout D. 22-Dec-2010:recommended IO/DG/DIP/CEP/PEDApprover Kim Y.- H. 11-Jan-2011:approved IO/DG/DIP/CEP

Document Security: level 1 (IO unclassified)RO: Serio Luigi

Read Access LG: IO cryogenic section, LG: Cryogenic scheduler, LG: external cryogenic collaborator, LG: CDR 341_Review panel members, LG: CDR 341_Chairman, LG: CDR_341 Scientific secretary, LG: CDR Cryolines Panel, GG: MAC Members and Experts, GG: STAC Members , GG: Council Preparatory Working Group (CPWG), LG: DA cryogenic group, LG: External cryogenic expert, LG: Cryoplant writers, AD: ITER, AD: External Collaborators, AD: DA, AD: Section - Remote Handling, AD: Section - Remote Handling - EXT, project administrator, RO

IDM UID

2LJS3KVERSION CREATED ON / VERSION / STATUS

10 Dec 2010 / 2.0 / APPROVED

EXTERNAL REFERENCE

PDF generated on 11-Jan-2011

Change LogVersion Latest Status Date Description of Changev2.0 Approved 10 Dec 2010 This document has been prepared on the basis of the contents outlined in the

previous version within the scope of Contrat ITER/CT/430000033.v1.1 Approved 23 Jul 2009 v1.0 Signed 25 Feb 2009

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Acknowledgments

The ITER Cryogenics Section would like to thank the following associates at Euratom-CEA for their work in preparing the present document:

P. Reynaud CEA/IFRM/STEP/GCRYD. Balaguer CEA/IFRM/STEP/GCRYP. Fejoz CEA/IFRM/STEP/GICAG. Gros CEA/IFRM/STEP/GCRYV. Lamaison CEA/IFRM/STEP/GCRYJ.L. Marechal CEA/IFRM/STEP/GCRYF. Michel CEA/INAC/SBTP. Roussel CEA/INAC/SBT

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Table of Contents

1. Purpose...............................................................................................................................16

2. Scope...................................................................................................................................16

3. Definitions..........................................................................................................................16

4. Engineering........................................................................................................................18

4.1 General Design ..........................................................................................................184.1.1 Pressure Equipment ................................................................................................19

4.1.1.1 Applicable Regulations...................................................................................194.1.1.2 Definitions-Scope-Classification ....................................................................20

4.1.1.2.1 Definitions.................................................................................................204.1.1.2.2 Scope .........................................................................................................214.1.1.2.3 Classifications ...........................................................................................22

4.1.1.3 Notified Body..................................................................................................224.1.1.4 Essential Safety requirement (ESR)................................................................22

4.1.1.4.1 Hazard analysis .........................................................................................234.1.1.4.2 Manufacturing ...........................................................................................23

4.1.1.4.2.1 Codes and standards ...........................................................................234.1.1.4.2.1.1 Harmonized standards .................................................................24

4.1.1.4.2.2 Materials.............................................................................................244.1.1.4.2.2.1 Normative references ..................................................................25

4.1.1.4.2.2.1.1 Materials for cryogenic vessel and cryogenic piping manufacture ..............................................................................................254.1.1.4.2.2.1.2 Material for other vessel manufacture..................................264.1.1.4.2.2.1.3 Material for warm piping manufacture ................................26

4.1.1.4.2.3 Permanent assembly...........................................................................274.1.1.4.2.4 Non-destructive testing ......................................................................27

4.1.1.5 Conformity module assessments.....................................................................274.1.1.6 Final assessment..............................................................................................274.1.1.7 Marking...........................................................................................................284.1.1.8 Instruction notice (part of documentation) .....................................................284.1.1.9 Safety devices .................................................................................................294.1.1.10 Technical professional book concerning equipment operated at low temperature .....................................................................................................................294.1.1.11 Guidelines concerning Pressure Equipment and the Pressure Equipment Directive .....................................................................................................................29

4.1.2 Sub-atmospheric process circuit protection ............................................................30

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4.1.2.1 Main Principles ...............................................................................................304.1.2.2 He guard..........................................................................................................30

4.1.2.2.1 Safety valves .............................................................................................314.1.2.2.2 Instrumentation..........................................................................................314.1.2.2.3 Valves and actuators..................................................................................32

4.1.3 Vacuum barriers......................................................................................................324.1.3.1 Mechanical Constraints...................................................................................324.1.3.2 Thermal Constraints........................................................................................334.1.3.3 Principle of vacuum barrier design .................................................................344.1.3.4 Materials .........................................................................................................35

4.1.3.4.1.1 Useful links ........................................................................................354.1.3.5 Assembly of the insulation vacuum barrier ....................................................35

4.1.3.5.1 Welding .....................................................................................................354.1.3.5.2 Brazing ......................................................................................................354.1.3.5.3 Cleaning ....................................................................................................354.1.3.5.4 Qualifications, Inspections and Tests........................................................354.1.3.5.5 Tests ..........................................................................................................36

4.1.4 Thermo-acoustic oscillation prevention..................................................................364.1.4.1 Proper design of cryogenic piping to avoid TAO...........................................364.1.4.2 Design of dynamic dampers............................................................................374.1.4.3 Various recommendations ..............................................................................38

4.1.5 Insulation.................................................................................................................384.1.5.1 Main principles ...............................................................................................384.1.5.2 Thermal shielding ...........................................................................................384.1.5.3 Vacuum...........................................................................................................394.1.5.4 Multi-Layer Insulation (MLI) .........................................................................394.1.5.5 Hot parts..........................................................................................................394.1.5.6 Insulation for cryogenics from 300 K to 80 K (perlite-insulated, foamglass ) 39

4.1.5.6.1 Foam Insulation.........................................................................................394.1.5.6.2 Perlite ........................................................................................................404.1.5.6.3 Indicative values........................................................................................41

4.1.6 Cleaning surface and treatment...............................................................................414.1.7 Useful documentation ...................................................................................