Burst Test Qualification Analysis of DWPF Canister-Plug Weld

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Description

The DWPF canister closure system uses resistance welding for sealing the canister nozzle and plug to ensure leak tightness. The welding group at SRTC is using the burst test to qualify this seal weld in lieu of the shear test in ASME B&PV Code, Section IX, paragraph QW-196. The burst test is considered simpler and more appropriate than the shear test for this application. Although the geometry, loading and boundary conditions are quite different in the two tests, structural analyses show similarity in the failure mode of the shear test in paragraph QW-196 and the burst test on the DWPF ... continued below

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24 p.

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Gupta, N.K. & Gong, Chung February 1, 1995.

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Description

The DWPF canister closure system uses resistance welding for sealing the canister nozzle and plug to ensure leak tightness. The welding group at SRTC is using the burst test to qualify this seal weld in lieu of the shear test in ASME B&PV Code, Section IX, paragraph QW-196. The burst test is considered simpler and more appropriate than the shear test for this application. Although the geometry, loading and boundary conditions are quite different in the two tests, structural analyses show similarity in the failure mode of the shear test in paragraph QW-196 and the burst test on the DWPF canister nozzle Non-linear structural analyses are performed using finite element techniques to study the failure mode of the two tests. Actual test geometry and realistic stress strain data for the 304L stainless steel and the weld material are used in the analyses. The finite element models are loaded until failure strains are reached. The failure modes in both tests are shear at the failure points. Based on these observations, it is concluded that the use of a burst test in lieu of the shear test for qualifying the canister-plug weld is acceptable. The burst test analysis for the canister-plug also yields the burst pressures which compare favorably with the actual pressure found during burst tests. Thus, the analysis also provides an estimate of the safety margins in the design of these vessels.

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24 p.

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INIS; OSTI as DE95060133

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  • Other Information: PBD: Feb 1995

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  • Other: DE95060133
  • Report No.: WSRC-TR--94-0402
  • Grant Number: AC09-89SR18035
  • DOI: 10.2172/69096 | External Link
  • Office of Scientific & Technical Information Report Number: 69096
  • Archival Resource Key: ark:/67531/metadc708932

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 1, 1995

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 9, 2016, 7:36 p.m.

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Gupta, N.K. & Gong, Chung. Burst Test Qualification Analysis of DWPF Canister-Plug Weld, report, February 1, 1995; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc708932/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.