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ASIPP Modifications to the SSMIC Specification

ASIPP Modifications to the SSMIC Specification. SSMIC Specification Update. For the first batch of SSMIC that was manufactured please provide the tolerances achieved.

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ASIPP Modifications to the SSMIC Specification

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  1. ASIPP Modifications to the SSMIC Specification

  2. SSMIC Specification Update For the first batch of SSMIC that was manufactured please provide the tolerances achieved. For the second batch of production SSMIC required to manufacture the prototype IVC Coils provide achievable tolerances as well as update other parameters as required (July) We will review ASIPP’s input and update the SSMIC Specification Note that the following slides show the old SSMIC Specification requirements SSMIC Specification Review 10-27-11

  3. ELM Dimensions Update with Requested Tolerances Jacket 4mm thick Conductor 13mm thick Tolerance +/- .1mm MgO 2.5mm thick Min. MgO thickness

  4. VS Dimensions Update with Requested Tolerances Jacket 2mm thick Conductor 15mm thick MgO 5mm thick Tolerance +/- .1mm

  5. Update with Requested Material Properties Materials - ELM Jacket • Inconel 625 Jacket Specification • The Inconel 625 jacket material shall conform to ASTM standard B-443 (UNS N06625) except that the Inconel is annealed then cold drawn into tube stock to produce the required yield strength, tensile strength, and hardness specified in paragraphs below. • Inconel 625 Yield Strength • Yield Strength of the tube/jacket shall be 414 MPa min. to 517 MPa max. (0.5% extension under load) at room temperature • Inconel 625 Tensile Strength • Ultimate Tensile Strength shall be 800 MPa minimum with a minimum extension under load of 25% at room temperature • Inconel 625 Hardness • The conductor shall have a Brinell Hardness between 140 and 200 at room temperature. If there is a discrepancy between the Hardness requirement and the Yield Strength requirement the Yield Strength measurement shall be the governing requirement.

  6. Update with Requested Material Properties Materials - VS Jacket We will use the same 316L SS grade as is used for the ITER PF Coils at ASIPP The modified 316L is annealed and then cold drawn into tube stock , to produce the required yield strength, tensile strength, and hardness specified in paragraphs that follow. Modified 316L SS Yield Strength Yield Strength shall be 173 MPa minimum (0.5% extension under load) at room temperature Modified 316L SS Tensile Strength Ultimate Tensile Strength shall be 483 MPa minimum with a minimum total elongation at failure of 35% at room temperature. Modified 316L SS Hardness The conductor shall have a Brinell Hardness between 140 and 150 at room temperature. If there is a discrepancy between the Hardness requirement and the Yield Strength requirement the Yield Strength measurement shall be the governing requirement.

  7. Materials – ELM Conductor Update with Requested Material Properties C18150 (CuCrZr) Copper Alloy Specification The CuCrZr conductor will be made of tubing that is solution annealed at a temperature of 950C and water quenched by the supplier. This will make the CuCrZr easier to form while fabricating the coil The copper-chromium-zirconium (CuCrZr) alloy shall conform to UNS C18150

  8. Materials – ELM Conductor (continued) Update with Requested Material Properties After the SSMIC is compacted and it is formed into U shaped sections ready for brazing into the coil assembly the bent section of SSMIC will be be aged (hardened) at 550 C for 2 hrs. then slow cooled at 1.3 C/second to obtain the following properties After hardening Copper Alloy Yield Strength: Yield Strength shall be 240 MPa min. to 270 MPa max. (0.5% extension under load) at room temperature After hardening Copper Alloy Tensile Strength: Ultimate Tensile Strength shall be 370 MPa minimum with a minimum total elongation of 17% at room temperature After hardening Copper Alloy Hardness: The conductor shall have a Rockwell Hardness B between 73 and 82 at room temperature. If there is a discrepancy between the Hardness requirement and the Yield Strength requirement the Yield Strength measurement shall be the governing requirement.

  9. Materials – ELM ConductorElectrical Requirements (continued) Update with Requested Material Properties The 550C heat treatment with the slow cooling at 1.3 C/sec specified is critical for the electrical conductivity of the CuCrZr alloy. It will be necessary to verify that the CuCrZr has the required electrical properties after the heat treatment Annealed Condition: The electrical resistivity at 20°C shall be between 3.9 micro ohm –cm and 5.0 micro ohm – cm. depending on the details of the solution annealing and cooling. The samples of CuCrZr alloy will be tested in the annealed condition. Test method ASTM B 193 or E1004-02 shall be used. After Heat Treatment: Electrical resistivity to be tested The ELM conductor shall have a maximum temperature coefficient of resistance of 0.0031 per °C

  10. Materials – VS Conductor Update with Requested Material Properties C10200 Copper Alloy Specification The copper shall conform to UNS C10200 and ASTM standard B187 except that the copper is cold drawn to produce the required yield strength, tensile strength, and hardness specified in paragraphs below. C10200 Copper Alloy Yield Strength Yield Strength shall be 179 MPa min. to 207 MPa max. (0.5% extension under load) at room temperature. C10200 Copper Alloy Tensile Strength Ultimate Tensile Strength shall be 240 MPa minimum with a minimum total elongation of 25% at room temperature. C10200 Copper Alloy Hardness The conductor shall have a Rockwell Hardness F between 60 and 70 at room temperature. If there is a discrepancy between the Hardness requirement and the Yield Strength requirement the Yield Strength measurement shall be the governing requirement. C10200 Copper Alloy Resistance The VS conductor shall have a minimum conductivity of 100% IACS at 20°C Temperature Coefficient of Resistance The VS conductor shall have a maximum temperature coefficient of resistance of 0.0041 per °C

  11. Materials-MgO Density The MgO density shall be measured or calculated during the development of the SSMIC assembly. The density shall be sufficient to satisfy the mechanical and electrical requirements for the SSMIC which will be verified with testing. Typical densities for crushable MgO insulators range from 2060 kg/m^3 to 3060 kg/m^3. Grain Size The MgO shall have a maximum grain size of 80 micrometers Radiation resistance Any additives or binders used to fabricate the SSMIC must be proved compatible with ITER operation in the required radiation flux by testing in accordance with SOW 843-20111006-NEUMEYER

  12. MgO Marialsm Imputites Comparison of MgO Purity of ASIPP Suppliers to ASTM E1652-03 Specification ASTM E1652-03 Standard Specification for Magnesium Oxide Crushable Insulators MgO Purchased by ASIPP from 3 Vendors

  13. Conductor Resistance TestingVS Conductor • ELM and VS Samples shall be tested according to ASTM B193 - 02(2008) Standard Test Method for Resistivity of Electrical Conductor Materials, or equivalent, to confirm properties. • The VS OFHC Copper conductor shall have a minimum conductivity of 100% IACS at 20°C

  14. Conductor Resistance TestingELM Conductor • The ELM CuCrZr electrical resistivity at 20°C shall be between 3.9 micro ohm –cm and 5.0 micro ohm – cm. depending on the details of the solution annealing and cooling. The samples of CuCrZr alloy will be tested in the annealed condition. • Note: After assembly of the SSMIC into the ELM Coil assembly and after the SSMIC sections are brazed together the ELM Coil Assembly will be heat treated at 450C to 500C for 4 hours. After this heat treatment the resistance of the CuCrZr will be 2.17 micro ohm–cm.

  15. QC-Jacket and Conductor Integrity Due to high fatigue environment we must minimize flaws in tubing ASIPP will require NDT techniques It is possible we can relieve this requirement for the VS Jacket and Conductor The tubing shall not contain flaws with an area >0.3 sq. mm within the material and the dimension of any discontinuity on the inner diameter or outer diameter surfaces such as cracks, laps, folds, scale, shall be <0.5 mm. The finished material shall be free from all other imperfections, such as damaged corners or edges.

  16. QC- MgO Chemistry MgO Chemistry Each batch of MgO shall be chemically analyzed using test methods identified in ASTM E1652-03 Section 9. Test results are to be compared to the allowable chemical impurities for compliance. The MgO shall be tested after firing in the oven to verify that added binders have been burnt off. MgO Density A sample from each batch of MgO preforms shall be tested to be certain that the density consistently meets the requirement. Grain Size MgO is to be supplied with certifications showing that the requirement is met for the maximum allowable grain size

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