Installation and inactive commissioning of the JET active gas handling system (AGHS)

Hemmerich, J.L.; Bell, A.C.; Boucquey, P.; Caldwell-Nichols, C.; Chuilon, P.; Delvart, F; Grieveson, B.; Haange, R.; Jones, G. H.; Lässer, R.; Laveyry, M.; Lupo, J; Mart, J.; Milverton, P.; Salanave, J L; Serio, L.; Skinner, N.L.; Stagg, R.; Walker, Ken; Yorkshades, J.; Konstantellos, A.; Küssel, E.

doi:10.1109/sfe.1993.472789

Cited by 7 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The EDS is sized for the same conditions as the original system: to maintain an air in-flow velocity ⩾1 m•s −1 through a JET main horizontal port used for remote access during torus maintenance [8]. This corresponds to a maximum flowrate of 500 m 3 •h −1 through EDS.…”

Section: System Requirementsmentioning

confidence: 99%

JET exhaust detritiation system replacement—design, commissioning, and operation

George

Kennedy

Huddleston

et al. 2023

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

The Exhaust Detritiation System (EDS) of the JET Active Gas Handling System (AGHS) removes tritium from exhaust gases and contaminated air prior to discharge to stack. The system was replaced prior to JET’s tritium experimental campaign due to corrosion damage. In this paper, the following topics are presented:• System function and description• Corrosion and failure of the previous EDS• Enhancements for the replacement EDS including testing of acid passivation column• Commissioning experience• Operating experience and performanceAcids including hydrofluoric were generated in catalytic recombiners following inadvertent halogen ingress. Pitting corrosion was identified with breakthrough failure of condensate pipework. To mitigate a recurrence, a novel acid passivation sub-system was designed. The acid passivation testing demonstrated successful performance of the design and calcium-hydroxide passivation packing tested, with acids below the limit of detectability at the test column outlet. Issues encountered during commissioning are described and key performance metrics such as detritiation factor reported. Finally, operational issues and system performance is presented.

show abstract

Section: System Requirementsmentioning

confidence: 99%

JET exhaust detritiation system replacement—design, commissioning, and operation

George

Kennedy

Huddleston

et al. 2023

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

show abstract

“…So, the water accumulation equations, equations (3), (4) and (5), remain unchanged for the dehumidifier/collector. 4. HTO Accumulation and Exhaust.…”

Section: Mathematical Modelsmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] Often such systems oxidize tritium in all forms to tritiated water and subsequently collect the water on an adsorbent such as molecular sieve. These systems have been shown to be very effective at reducing tritium emissions.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Comparison of Three Tritium System Effluent HTO Cleanup Systems

Willms

Gentile

Rule

et al. 2002

Fusion Science and Technology

View full text Add to dashboard Cite

It important that air emissions from tritium systems be kept as low as reasonably achievable. Thus, over the years a number of gas detritiation systems have been developed. An often-used system for this purpose is one which oxidizes tritium in all forms to tritiated water followed by collection of the tritiated water on an adsorbent. These systems have been shown to be very effective at reducing tritium emissions. However, recently there has been interest in lower-cost, simpler systems which do not convert HT to the much more hazardous HTO form. One example of such a system is one based on a bubbler and dehumidifier. The bubbler collects HTO by exchange with its H 2 O, and it humidifies the gas. The dehumidifier condenses water (HTO and H 2 O) from the gas and returns it to the bubbler. Besides the bubbler/dehumidifier, this paper will also consider a dehumidifier/collector and an adsorber/collector (defined later). A computer model of each configuration was written and run. The results are used to compare each system's performance. Tritium buildup in each system's liquid water, and tritium exhausted to the environment are presented and compared for all three systems.

show abstract

“…For the preparation of this new phase of the project, in January 2013 an international workshop was held to learn the experience gained in other organizations and projects [1][2][3] like CEA, CERN, ITER, JET, NIFS, PPPL, NFSI/KSTAR [4]. Based on the good experience with the quality management of the project, which is certified according to DIN ISO 9001, the new elements became inherent part of this system.…”

Section: Introductionmentioning

confidence: 99%