Pressure Vessel Design (PVD) for HPgTPC

Prashant Kumar, Vikas Teotia, Sanjay Malhotra

Bhabha Atomic Research Centre, India

Outline

• Vessel Geometry and Material of Construction

• Thickness calculation as per ASME Code for PV Shell portion

• Selection of Vessel head and its thickness calculation as per ASME Code

• Simulations with Hemispherical pressure vessel head

• Summary and Future work

Vessel Geometry and Material of Construction

Mechanical Properties: AL 5083

S.

N

Descri

ption

Design

ation

Tensile

Strength

(MPa)

Yield Strength

(MPa) 0.2%

Proof

1 5083-

O

B209M 270-345 115-200

2 5083-

H32

B209M 305-385 215 min

3 5083-

H116

B928M 305 min 215 min

4 5083-

H321

B928M 305-385 215 min

S. N Description Value (mm)

1 Vessel inner diameter 5725 mm

2 Length of Shell portion 5192 mm

3 Design Pressure 10 bar

Thickness calculation for Shell portion: ASME BPV Code Sec. VIII D.1

Assumptions:

Weld efficiency factor (E) = 1.00

Design temperature = 28°C

F.O.S = 3, thus S (maximum allowable stress) = 215 / 3 = 71.66 MPa

Physics Requirements ?? Thickness (barrel section) of < = 0.5 radiation lengths

Selection of Vessel head and its thickness calculation

Selection of Vessel head and its thickness calculation

Thickness calculation for Shell portion: Conti…

ID: Ø 5725 mm

40.28 mm

5192 mm

Therefore, OD = 5725 + 2 * 40.28 = 5805.36 mm

40.28 mm

5192 mm

ID: Ø 5725 mm

Maximum Von Mises Stress = 95.379 Mpa

Yield value = 195 Mpa

Analysis of Hemispherical shaped PV head

OD : 5.805 m ID : 5.725 m Length of Shell : 5.192 m Thickness of shell : 40 mm Thickness of PV head : 20 mm

Analysis of Hemispherical shaped PV head

(no ribs)

Support width : 200 mm Support thickness : 100 mm

Support (only for simulation purpose)

Analysis of Hemispherical shaped PV head (Von Mises Stress)

Analysis of Hemispherical shaped PV head (Maximum Displacement)

Analysis of Hemispherical shaped PV head (ribbed Shell)

Rib thickness : 50 mm Rib width : 100 mm Number of ribs : 3

Analysis of Hemispherical shaped PV head (Maximum Displacement)

Analysis of Hemispherical shaped PV head (Maximum Displacement)

Summary and future work

• Preliminary calculation and simulations are carried out for pressure vessel of TPC

• At 40 mm shell thickness; Von mises stress and displacement is evaluated by simulations

• With out ribs, the maximum Von mises stress on vessel is about 100 MPa.

• With three ribs, Von mises stress on vessel reduces to about 85 Mpa

• Above level of Von Mises stress are lower than the Yield strength of the designated Aluminum, i.e. 215 MPa