Reliability Estimation for Double Containment Piping

Cadwallader, L.C.; Pinna, T.

doi:10.13182/fst13-a18102

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…The conclusion is that the TSTA value is reasonable to use when modeling tritium piping. If the designer finds this failure rate is predicting leakage due to the lengths of pipe in use, then secondary containment [13] may address the concern. …”

Section: Tritium-bearing Pipingmentioning

confidence: 99%

TSTA piping and flame arrestor operating experience data

Cadwallader

Willms

2015

Fusion Engineering and Design

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h i g h l i g h t s• Experiences from the Tritium Systems Test Assembly were examined.• Failure rates of copper piping and a flame arrestor were calculated.• The calculated failure rates compared well to similar data from the literature.• Tritium component failure rate data support fusion safety assessment. a b s t r a c tThe Tritium Systems Test Assembly (TSTA) was a facility dedicated to tritium handling technology and experiment research at the Los Alamos National Laboratory. The facility was operated with tritium for its research and development program from 1984 to 2001, running a prototype fusion fuel processing loop with ∼100 g of tritium as well as small experiments. There have been several operating experience reports written on this facility's operation and maintenance experience. This paper describes reliability analysis of two additional components from TSTA, small diameter copper gas piping that handled tritium in a nitrogen carrier gas, and the flame arrestor used in this piping system. The component failure rates for these components are discussed in this paper. Comparison data from other applications are also presented.

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Section: Tritium-bearing Pipingmentioning

confidence: 99%

TSTA piping and flame arrestor operating experience data

Cadwallader

Willms

2015

Fusion Engineering and Design

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“…To assure the integrity of weld joints, the correct welding parameters/procedures must be selected to prevent the formation of defects, as well as to eliminate possible defects introduced by the welding 1-3 . Most defects can be detected by non-destructive techniques [4][5][6][7] . The elimination of defects in welds contributes significantly to assure a good performance.…”

Section: Introductionmentioning

confidence: 99%

Residual Stress, Microstructure and Hardness of Thin-Walled Low-Carbon Steel Pipes Welded Manually

Silva

Assis²,

Philippov³

et al. 2016

Mat. Res.

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The aim of this work is to evaluate the welding residual stress profile in ASTM A106 Gr. B steel pipes with 4" diameter and to correlate this profile with the microstructure and hardness of the joint. The results showed that the residual stresses are more uniform for a lower welding heat input. Higher welding heat input causes not only a non-uniformity of the stress profile but also promotes the maximum stress as high as the yield strength. The microstructure was composed of ferrite, perlite and possibly bainite; the presence of martensite was not verified. The hardness results indicated that none of the welding parameters used produced levels of hardness greater than 249 HV. Such a result is of fundamental importance because it suggests that low hardness does not necessarily mean low residual stress levels.

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Reliability Estimation for Double Containment Piping

Cited by 2 publications

References 10 publications

TSTA piping and flame arrestor operating experience data

TSTA piping and flame arrestor operating experience data

Residual Stress, Microstructure and Hardness of Thin-Walled Low-Carbon Steel Pipes Welded Manually

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