Pressure Vessel Design for HPgTPC Prashant Kumar, Vikas Teotia, - - PowerPoint PPT Presentation

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Pressure Vessel Design for HPgTPC Prashant Kumar, Vikas Teotia, - - PowerPoint PPT Presentation

Aug 21, 2022 48 likes •213 views

Pressure Vessel Design for HPgTPC Prashant Kumar, Vikas Teotia, Sanjay Malhotra Bhabha Atomic Research Centre Trombay, India 26.07.2019 DUNE Pressure Vessel Meeting 26.07.2019 Topics discussed in previous Meeting Pressure Vessel Shell

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SLIDE 1

Prashant Kumar, Vikas Teotia, Sanjay Malhotra

Bhabha Atomic Research Centre Trombay, India

26.07.2019

Pressure Vessel Design for HPgTPC

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 2

DUNE Pressure Vessel Meeting 26.07.2019

Pressure Vessel Shell thickness calculation for AL 5083 Design and Analysis for Torispherical Head Design and Analysis for Elliptical Head Comparison b/w Elliptical Heads based on ratio of Major to Minor axis Analysis of Support for Pressure Vessel

Topics discussed in previous Meeting

Note: Material Properties for AL 5083 (71 MPa) were taken from literature survey

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SLIDE 3

Outline

  • Allowable stress (ASME, D) for PV Materials and corresponding thickness
  • Maximum Allowable stress for AL 5083 Series
  • Appendix 1 / Ellipsoidal Head Design
  • 2D Axisymmetric Analysis & Results Discussion
  • Assessment of failure criteria and limitation of Div 1
  • Design by Analysis (Div 2 ) Requirements
  • Stress Classification for HPgTPC P. Vessel
  • Elastic stress analysis to avoid Plastic Collapse
  • Limit verification to avoid Plastic Collapse
  • 3D FEM Analysis for HPgTPC Pressure Vessel with distributed mass (300 Ton)

Initiated

  • Summary and Conclusion
  • Future Work

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 4

Allowable S for PV Materials & corresponding Thickness

S. No Categori es ASME Materials (Plate, sheet), II, D Allowabl e stress (MPa) Shell (t mm) (Div 1, UG-27) Elliptical Head (t, mm) Appendix 1 Nozzle wall (t, mm) Opening 1000 mm 1 Aluminu m SB20 9 A95083, H321 86.9 33.2 = 34 23 6 2 Carbon Steel SA 283 118 24.3 = 25 17 5 SA 516 128 22.4 = 23 16 4 SA 537 138 20.8 = 21 14 4 SA 738 158 18.1 = 19 13 4 3 Stainless Steels SA-240 S301 138 20.8 = 21 14 4 SA-666 S21904 177 16.2 = 17 11 3 SA-240 S30815 172 16.7 = 17 12 3 SA-240 S32202 185 15.5 = 16 11 3 4 Nickel SB-409 177 16.2 = 17 11 3 SB-424 161 17.8 = 18 12 4 *** Corrosion allowance, mill tolerance to be added further

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 5

Maximum Allowable stress for AL 5083 Series

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 6

Appendix 1 / Ellipsoidal Head Design

D / 2h = 5725 / (2*2000) = 1.43 K = 0.67 t = 23 mm Crown radius = K * D = 0.67 * 5725 = 3836 mm

  • S. N

Description Value 1 Internal pressure (P) 10 bar (1 MPa) 2 D 5725 mm 3 K 0.66 4 S (AL 5083) 86.9 MPa 5 E 1.00

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 7

2D Axisymmetric Analysis & Results Discussion

500 mm

Nozzle to Head Junction Head to Shell Transition Shell DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 8

Assessment of Failure criteria and limitation of Div 1

Failure Criteria

Justification for higher allowable stresses (Div 2)

  • Experienced obtained from other PV Codes
  • More stringent material requirements
  • Higher material toughness requirements
  • Increased NDE

Assessment (Particular to HPgTPC) Div 1 Div 2 TOF MPST Tresca (earlier) / Distortion Energy Criteria (Now) FOS 3.5 3.0 (Higher S) Load classification Not considered in Design Detail consideration in Design Fabrication and Inspection norms Easy compared to Div 2 Stringent Requirement DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 9

Design by Analysis (Div 2 ) Requirements

Design by Analysis: It is organised based on protection against the failure modes.

  • 1. Protection against Plastic Collapse
  • 2. Protection against Local Failure
  • 3. Protection against collapse from buckling
  • 4. Protection against failure from cyclic loading

3 Analysis method are provided for evaluating protection against plastic collapse

  • 1. Elastic stress analysis method
  • 2. Limit – Load Method
  • 3. Elastic – Plastic Stress Analysis Method (Ratcheting analysis)

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 10

Stress Classification for HPgTPC P. Vessel (Div 2)

  • S. N

Vessel Component Location Origin of Stress Type of Stress Classification 1 Shell Remote from Discontinuities Internal Pressure General Membrane Gradient through shell thickness Pm Pb PL Q Junction with head or flange Internal Pressure 2 Dished head (Elliptical Head) Crown Internal Pressure Membrane Bending Knuckle or Junction to shell Internal Pressure Membrane Bending Peak 3 Nozzle (In one of the Elliptical Head) Outside the limits

  • f reinforcement

Pressure General Membrane Pm Pb PL Q Pressure and all external loads and moments (Load attributed by dead weight

  • f

nozzle closure, weight of Person) Membrane Bending Peak Nozzle wall Gross structural discontinuities Membrane Bending Peak Differential Expansion 4 Nozzle Closure (Flat head) Center region Internal pressure Membrane Bending Pm Pb Junction to shell Internal pressure Membrane Bending PL Q

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 11

Elastic stress analysis to avoid Plastic Collapse

S.N AL 5083 (SB209) 1 Density 2657 Kg/m3 2 Isotropic elasticity 71 GPa 3 Tensile yield strength 125 MPa 4 Tensile ultimate strength 275 MPa

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 12

Limit Verification

Load Combination (MPa) Limit SCL 1 SCL 2 SCL 3 SCL 4 SCL5 SCL 6 SCL 7/8 SCL 9 SCL 10 Pm (S) 86.9 21.768 13.12 4.35 20.05 27.36 37.662 40.59 87.4 76.95 Pb (1.5 SPL) 130.35 28.593 145.01 62.48 45.673 36.05 30.19 18.12 1.24 34.44 Pm+ Pb (1.5 SPL) 124.05 30.687 124.93 54.34 65.72 63.09 67.851 58.70 87.96 84.06 Peak Stress 29.58 9.64 23.53 16.29 1.43 0.9 0.004 73.97 Max Total 55.68 56.163 67.93 58.83 87.96 120.95 Remarks Pass …… Pass Pass Pass Pass Pass …… …….

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 13

3D FE Analysis of HPgTPC Pressure Vessel

Solid Model Load Consideration Mesh S. N Particulars Values 1 Internal Pressure 10 bar (1 MPa) 2 ID of Shell 5725 mm 3 Head Type Ellipsoidal (D/2h = 1.43) 4 Manhole ID 1000 mm 5 Distributed Mass 300 Ton 6 Shell Thickness 40 mm 7 Nozzle Height 300 mm DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 14

Summary and Conclusion

  • Shell Thickness calculation done for different PV materials including

Al 5083

  • 2D Analysis and stress classification
  • Design by Analysis as per Div 2 initiated (Preliminary)
  • 3D Analysis with distributed mass (300 Ton) initiated

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 15

Future Work

  • Thickness calculation as per Div 2
  • Rigorous analysis for Ellipsoidal Head and Shell to be carried out

(As per Div 2)

  • Support System
  • BOLT Design
  • Flange Design for Pressure Vessel and Heads
  • Support Locations to avoid excessive sagging and hogging

DUNE Pressure Vessel Meeting 26.07.2019

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SLIDE 16

Thank You For Your Kind Attention

DUNE Pressure Vessel Meeting 26.07.2019