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Servo valve endurance test for water-hydraulic systems in ITER-relevant conditions

Tutkimustuotosvertaisarvioitu

Standard

Servo valve endurance test for water-hydraulic systems in ITER-relevant conditions. / Aha, Liisa; Väyrynen, Jukka; Tammisto, Jyrki; Mattila, Jouni; Esqué, Salvador; Sharratt, Rob.

julkaisussa: Fusion Engineering and Design, Vuosikerta 146, 09.2019, s. 2523 - 2526.

Tutkimustuotosvertaisarvioitu

Harvard

Aha, L, Väyrynen, J, Tammisto, J, Mattila, J, Esqué, S & Sharratt, R 2019, 'Servo valve endurance test for water-hydraulic systems in ITER-relevant conditions', Fusion Engineering and Design, Vuosikerta. 146, Sivut 2523 - 2526. https://doi.org/10.1016/j.fusengdes.2019.04.033

APA

Aha, L., Väyrynen, J., Tammisto, J., Mattila, J., Esqué, S., & Sharratt, R. (2019). Servo valve endurance test for water-hydraulic systems in ITER-relevant conditions. Fusion Engineering and Design, 146, 2523 - 2526. https://doi.org/10.1016/j.fusengdes.2019.04.033

Vancouver

Aha L, Väyrynen J, Tammisto J, Mattila J, Esqué S, Sharratt R. Servo valve endurance test for water-hydraulic systems in ITER-relevant conditions. Fusion Engineering and Design. 2019 syys;146:2523 - 2526. https://doi.org/10.1016/j.fusengdes.2019.04.033

Author

Aha, Liisa ; Väyrynen, Jukka ; Tammisto, Jyrki ; Mattila, Jouni ; Esqué, Salvador ; Sharratt, Rob. / Servo valve endurance test for water-hydraulic systems in ITER-relevant conditions. Julkaisussa: Fusion Engineering and Design. 2019 ; Vuosikerta 146. Sivut 2523 - 2526.

Bibtex - Lataa

@article{7b6f1c7cf97b4dcc92f149f4c6d9d977,
title = "Servo valve endurance test for water-hydraulic systems in ITER-relevant conditions",
abstract = "ITER Divertor maintenance equipment operates in the vacuum vessel in elevated temperature and under considerable radiation load. The heavy Divertor assemblies are lifted and transported using servo valve systems, such as Cassette Multi-functional Mover (CMM). Systems are powered with water hydraulics, using demineralized water as a pressure medium. Operations have not been tested in ITER-relevant environmental conditions and over projected duty cycles. As the hydraulic medium is rather aggressive and there are no servo valves designed for demineralized water, the greater than 2000-h operational time was considered a potential issue. Hence, a project was undertaken to ascertain the component compatibility with the environment and pressure medium, and their robustness over the required operational period. Irradiation of components was not considered at this phase of technology validation. A heated test chamber was constructed to emulate the projected maximum ambient temperature of 50 °C in the Divertor area. Test routines and measurements were specifically tailored to monitor the operational parameters of the servo valve. After the 2188-h test the servo valve parameters remained within the limits promised by the manufacturer. Pressure gain decreased and hysteresis increased but remained within the allowable limits. These changes did not have significant effect on the joint angle tracking error.",
keywords = "Remote handling, Water-hydraulics, Endurance testing, Servo valve",
author = "Liisa Aha and Jukka V{\"a}yrynen and Jyrki Tammisto and Jouni Mattila and Salvador Esqu{\'e} and Rob Sharratt",
note = "SI:SOFT-30",
year = "2019",
month = "9",
doi = "10.1016/j.fusengdes.2019.04.033",
language = "English",
volume = "146",
pages = "2523 -- 2526",
journal = "Fusion Engineering and Design",
issn = "0920-3796",
publisher = "Elsevier",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Servo valve endurance test for water-hydraulic systems in ITER-relevant conditions

AU - Aha, Liisa

AU - Väyrynen, Jukka

AU - Tammisto, Jyrki

AU - Mattila, Jouni

AU - Esqué, Salvador

AU - Sharratt, Rob

N1 - SI:SOFT-30

PY - 2019/9

Y1 - 2019/9

N2 - ITER Divertor maintenance equipment operates in the vacuum vessel in elevated temperature and under considerable radiation load. The heavy Divertor assemblies are lifted and transported using servo valve systems, such as Cassette Multi-functional Mover (CMM). Systems are powered with water hydraulics, using demineralized water as a pressure medium. Operations have not been tested in ITER-relevant environmental conditions and over projected duty cycles. As the hydraulic medium is rather aggressive and there are no servo valves designed for demineralized water, the greater than 2000-h operational time was considered a potential issue. Hence, a project was undertaken to ascertain the component compatibility with the environment and pressure medium, and their robustness over the required operational period. Irradiation of components was not considered at this phase of technology validation. A heated test chamber was constructed to emulate the projected maximum ambient temperature of 50 °C in the Divertor area. Test routines and measurements were specifically tailored to monitor the operational parameters of the servo valve. After the 2188-h test the servo valve parameters remained within the limits promised by the manufacturer. Pressure gain decreased and hysteresis increased but remained within the allowable limits. These changes did not have significant effect on the joint angle tracking error.

AB - ITER Divertor maintenance equipment operates in the vacuum vessel in elevated temperature and under considerable radiation load. The heavy Divertor assemblies are lifted and transported using servo valve systems, such as Cassette Multi-functional Mover (CMM). Systems are powered with water hydraulics, using demineralized water as a pressure medium. Operations have not been tested in ITER-relevant environmental conditions and over projected duty cycles. As the hydraulic medium is rather aggressive and there are no servo valves designed for demineralized water, the greater than 2000-h operational time was considered a potential issue. Hence, a project was undertaken to ascertain the component compatibility with the environment and pressure medium, and their robustness over the required operational period. Irradiation of components was not considered at this phase of technology validation. A heated test chamber was constructed to emulate the projected maximum ambient temperature of 50 °C in the Divertor area. Test routines and measurements were specifically tailored to monitor the operational parameters of the servo valve. After the 2188-h test the servo valve parameters remained within the limits promised by the manufacturer. Pressure gain decreased and hysteresis increased but remained within the allowable limits. These changes did not have significant effect on the joint angle tracking error.

KW - Remote handling

KW - Water-hydraulics

KW - Endurance testing

KW - Servo valve

U2 - 10.1016/j.fusengdes.2019.04.033

DO - 10.1016/j.fusengdes.2019.04.033

M3 - Article

VL - 146

SP - 2523

EP - 2526

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

SN - 0920-3796

ER -