First tests results for determination of seal life of EPDM O-rings at high temperature (determined by unique method)

Marlier, R.

doi:10.1179/174650909x12601996109032

Cited by 4 publications

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“…The test fixtures in previous work typically consisted of two flanges or two plates with two concentric O-ring grooves, one for the test seal and one for the secondary external seal, and a small cavity for helium tracer gas [6, 7]. A similar experimental configuration was used to examine the performance of elastomer seals at temperatures below 0 °C [8].…”

Section: Introductionmentioning

confidence: 99%

Performance of metal and polymeric O-ring seals during beyond-design-basis thermal conditions

et al. 2017

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This paper summarizes the small scale thermal exposure test results of the performance of metallic and polymeric O-ring seals typically used in radioactive material transportation packages. Five different O-ring materials were evaluated: Inconel/silver, ethylene-propylene diene monomer (EPDM), polytetrafluoroethylene (PTFE), silicone, butyl, and Viton. The overall objective of this study is to provide test data and insights to the performance of these Oring seals when exposed to beyond-design-basis temperature conditions due to a severe fire. Tests were conducted using a small-scale stainless steel pressure vessel pressurized with helium to 2 bar or 5 bar at room temperature. The vessel was then heated in an electric furnace to temperatures up to 900 °C for a pre-determined period (typically 8 h to 9 h). The pressure drop technique was used to determine if leakage occurred during thermal exposure. Out of a total of 46 tests performed, leakage (loss of vessel pressure) was detected in 13 tests.

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Section: Introductionmentioning

confidence: 99%

Performance of metal and polymeric O-ring seals during beyond-design-basis thermal conditions

et al. 2017

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Picosecond laser surface micro-texturing for the modification of aerodynamic and dust distribution characteristics in a multi-cyclone system

2016

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Used Nuclear Fuel Transportation Package Seal Performance in Beyond Design Basis Thermal Conditions

Gonzalez

Bajwa

Einziger

et al. 2011

Volume 7: Operations, Applications, and Components

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The U.S. Nuclear Regulatory Commission (NRC) is evaluating the performance of seals in used fuel transportation packages during beyond-design-basis fires, similar to the Baltimore tunnel fire that occurred in 2001. The performance of package seals is important for determining the potential for a release of radioactive material from a package during a beyond-design-basis accident. Seals generally have lower temperature limits than other package components and are often part of the containment barrier between the environment and the cask contents. The NRC’s Office of Nuclear Regulatory Research (RES) funded the National Institute of Standards and Technology (NIST) to conduct small-scale thermal testing to obtain experimental data of the performance of seals during beyond-design basis temperature exposures. The experimental testing consisted of several small-scale pressure vessels fabricated with a modified ASME flange design, using commercial grade metallic seals, similar to those that might be used on an actual spent nuclear fuel transportation package. The vessels were heated in an electrical furnace for exposures up to 9 hours (hrs) at temperatures as high as 800°C (1472°F), which far exceeded the rated temperature of the seals in question. This paper will provide a summary of the testing completed as well as the preliminary results and conclusions of the experiments performed by NIST.

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First tests results for determination of seal life of EPDM O-rings at high temperature (determined by unique method)

Cited by 4 publications

References 1 publication

Performance of metal and polymeric O-ring seals during beyond-design-basis thermal conditions

Performance of metal and polymeric O-ring seals during beyond-design-basis thermal conditions

Picosecond laser surface micro-texturing for the modification of aerodynamic and dust distribution characteristics in a multi-cyclone system

Used Nuclear Fuel Transportation Package Seal Performance in Beyond Design Basis Thermal Conditions

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