Value Engineering in System of Cryoline and Cryo- distribution for ITER: In-kind Contribution from India

Design of ITER Relief Lines

“…In the absence of single code/standard for design of cryolines, use of multiple standards and commercially proven software tools with seamless integration have been used to improve the reliability of the design. Moreover, the valuable experience gained in design, manufacturing, installation, and testing of Prototype Cryoline and its components [2] [3] has been utilised in comparatively simpler design of relief lines. Cryogenic grade stainless steel 1.4306 has been selected as a material for Process pipe (PP), internal fixed supports as well as vacuum barriers and 1.4306/1.4307 for Outer Vacuum Jacket (OVJ).…”

Status of ITER Cryodistribution and Cryoline project

“…Apart from the technical requirements, project imposed system classifications are (i) Safety Importance Classification (SIC): Non Safety important, Safety relevant, SIC-2 (ii) Quality Classification (QC): QC 1, QC 2, QC 3 and QC 4 (iii) Seismic Classification (SC): Non-Seismic, SC2, SC1 (SF) (iv) Vacuum Quality Classification (VQC): VQC 4A/B [3]. Each of these classifications have specific meaning and to fulfill certain functions in terms of design conformity.…”

“…Each of these classifications have specific meaning and to fulfill certain functions in terms of design conformity. Three events of seismic level (SL) spectrum are to be considered for the designs, which are Cadarache site specific, 3 [3]. These regulatory requirements ensure proper classification, identification of category and evaluation of conformity of the pressure equipment in a nuclear establishment.…”

“…The technical and project risks [3] at the early stage of the project made efficient execution and implementing the strategy into practice. The major risk drivers were found to be (i) First of its kind design (ii) Management of establishing too many interfaces, (iii) Interface load, (iv) Compatibility of material, (v) Compliance with French nuclear safety, (vi) Space constraints and layout, (vii) Quality and (viii) Regulatory requirement.…”