Tritium and helium release from irradiated beryllium

R. A. Anderl; J. D. Baker; G. L. Bourne; R. J. Pawelko

doi:10.13182/fst95-a30556

Tritium and helium release from irradiated beryllium

R. A. Anderl, J. D. Baker, G. L. Bourne, R. J. Pawelko

Nuclear Science & Technology

Research output: Contribution to journal › Conference article › peer-review

11 Scopus citations

Abstract

Tritium and helium release behavior have been measured for Be specimens irradiated at 75°C in the Advanced Test Reactor (ATR) to a fast neutron fluence of 5×10²² n/cm². Stepped-isothermal anneal experiments were conducted from room temperature to above the melting point of Be, with the temperature steps varied from one experiment to the other. In-line ion chambers and quadrupole mass spectrometers were used to measure the gases released to an Ar process gas stream flowing across a heated specimen. Gases released from the specimens included H₂, ³He, ⁴He, and tritium as HT and T₂. Release of the hydrogenic and tritium gases were observed to be concurrent with the release of helium, providing direct evidence of these gases in microscopic helium bubbles in the irradiated Be. Tritium and helium release kinetics were dependent on the magnitude of the temperature steps between 600°C and 800°C.

Original language	English
Pages (from-to)	1114-1119
Number of pages	6
Journal	Fusion Technology
Volume	28
Issue number	3 pt 2
DOIs	https://doi.org/10.13182/fst95-a30556
State	Published - 1995
Event	Proceedings of the 5th Topical Meeting on Tritium Technology in Fission, Fusion, and Isotopic Applications. Part 1 (of 2) - Belgirate, Italy Duration: May 28 1995 → Jun 3 1995

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title = "Tritium and helium release from irradiated beryllium",

abstract = "Tritium and helium release behavior have been measured for Be specimens irradiated at 75°C in the Advanced Test Reactor (ATR) to a fast neutron fluence of 5×1022 n/cm2. Stepped-isothermal anneal experiments were conducted from room temperature to above the melting point of Be, with the temperature steps varied from one experiment to the other. In-line ion chambers and quadrupole mass spectrometers were used to measure the gases released to an Ar process gas stream flowing across a heated specimen. Gases released from the specimens included H2, 3He, 4He, and tritium as HT and T2. Release of the hydrogenic and tritium gases were observed to be concurrent with the release of helium, providing direct evidence of these gases in microscopic helium bubbles in the irradiated Be. Tritium and helium release kinetics were dependent on the magnitude of the temperature steps between 600°C and 800°C.",

author = "Anderl, {R. A.} and Baker, {J. D.} and Bourne, {G. L.} and Pawelko, {R. J.}",

year = "1995",

doi = "10.13182/fst95-a30556",

language = "English",

volume = "28",

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journal = "Fusion Technology",

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publisher = "American Nuclear Society",

number = "3 pt 2",

note = "Proceedings of the 5th Topical Meeting on Tritium Technology in Fission, Fusion, and Isotopic Applications. Part 1 (of 2) ; Conference date: 28-05-1995 Through 03-06-1995",

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TY - JOUR

T1 - Tritium and helium release from irradiated beryllium

AU - Anderl, R. A.

AU - Baker, J. D.

AU - Bourne, G. L.

AU - Pawelko, R. J.

PY - 1995

Y1 - 1995

N2 - Tritium and helium release behavior have been measured for Be specimens irradiated at 75°C in the Advanced Test Reactor (ATR) to a fast neutron fluence of 5×1022 n/cm2. Stepped-isothermal anneal experiments were conducted from room temperature to above the melting point of Be, with the temperature steps varied from one experiment to the other. In-line ion chambers and quadrupole mass spectrometers were used to measure the gases released to an Ar process gas stream flowing across a heated specimen. Gases released from the specimens included H2, 3He, 4He, and tritium as HT and T2. Release of the hydrogenic and tritium gases were observed to be concurrent with the release of helium, providing direct evidence of these gases in microscopic helium bubbles in the irradiated Be. Tritium and helium release kinetics were dependent on the magnitude of the temperature steps between 600°C and 800°C.

AB - Tritium and helium release behavior have been measured for Be specimens irradiated at 75°C in the Advanced Test Reactor (ATR) to a fast neutron fluence of 5×1022 n/cm2. Stepped-isothermal anneal experiments were conducted from room temperature to above the melting point of Be, with the temperature steps varied from one experiment to the other. In-line ion chambers and quadrupole mass spectrometers were used to measure the gases released to an Ar process gas stream flowing across a heated specimen. Gases released from the specimens included H2, 3He, 4He, and tritium as HT and T2. Release of the hydrogenic and tritium gases were observed to be concurrent with the release of helium, providing direct evidence of these gases in microscopic helium bubbles in the irradiated Be. Tritium and helium release kinetics were dependent on the magnitude of the temperature steps between 600°C and 800°C.

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VL - 28

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JO - Fusion Technology

JF - Fusion Technology

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T2 - Proceedings of the 5th Topical Meeting on Tritium Technology in Fission, Fusion, and Isotopic Applications. Part 1 (of 2)

Y2 - 28 May 1995 through 3 June 1995

ER -

Tritium and helium release from irradiated beryllium

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