Study on Pitting Corrosion of AlMg2 in Solution Containing Chloride

Febrianto,; Sriyono, Sriyono; Hastuti, Endiah Puji; Sunaryo, Geni Rina

doi:10.1088/1742-6596/1198/2/022061

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…The surveillance records are provided in the form of records in the operation master book and since 2014, it has been provided in the form of 'Reactor Mobile Control Check List and Related Systems by RSG-GAS Reactor Operators and Supervisors'. Non-routine maintenance activities on critical components of RSG-GAS include repair maintenance and in service inspections [16][17][18][19][20].…”

Section: Resultsmentioning

confidence: 99%

Evaluation on Structure, System, and Component Qualification in the Periodic Safety Review of RSG-GAS

Hastuti

Purwadi

Sudarmono

et al. 2023

Science and Technology Applications

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In order to obtain license renewal for RSG-GAS operation expired in 2020, an evaluation on periodic safety review (PSR) should be performed as required by BAPETEN regulation. This PSR had been done from 2005 to 2015. The objectives of the qualification review is to ensure that the critical structure, system, and component (SSC) for safety fulfils the requirements. SSC, which is important to safety, is reviewed in term of its environment, service frequency, aging mechanism, aging mitigation, and aging degradation detection. The results of this detection are evaluated to achieve sustainable and safe operation and to identify SSC replacement and repair before a failure occurs. From the evaluation results, it can be concluded that SSC qualification during the period of 2005 – 2015 still fulfils the requirements so that safe and sustainable operation of RSG-GAS is assured.

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Section: Resultsmentioning

confidence: 99%

Evaluation on Structure, System, and Component Qualification in the Periodic Safety Review of RSG-GAS

Hastuti

Purwadi

Sudarmono

et al. 2023

Science and Technology Applications

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“…Calculations demonstrated that the hydroxide films formed during recovery of the water content of rocks provide long-term protection for the aluminium formed. Aluminium and its alloys are known to be corroded by water containing aggressive anions, especially chloride solutions, even at low temperatures [e.g., Vijh, 1988;McCafferty, 2003;Naeini at al., 2011;Febrianto et al, 2019;Peng et al, 2022, etc.]. Moreover, it was reported that films formed on the surface of aluminium and its alloys also undergo point corrosion (pitting) by chloride solutions [e.g., Foroulis et al, 1975;Yu et al, 2000;Kolics et al, 2001;Li et al, 2013Li et al, , 2017.…”

Section: T a B L E 5 Tp-conditions For Calculations Of Seriesmentioning

confidence: 99%

Native aluminum as indicator of hydrogen degassing in the formation of hydrocarbon fields

Lukin¹,

Koliabina²,

Shestopalov³

et al. 2023

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This work considers the possibility of native aluminum transport with hydrogen fluid, its deposition and preservation in sedimentary rocks, as well as an assessment of the conditions under which this is possible. This problem is currently debatable and is considered in a number of publications. Native aluminum was found in different types of sedimentary rocks of oil-and-gas-bearing basins. So the presence of native aluminum spherulas was established in the dolomites of the Dnipro-Donetsk Basin. By the example of these findings this work shows that the necessary conditions for the formation and long-term preservation of native aluminum are: its migration with the hydrogen flow into the upper layers of the Earth’s crust, the creation of temperature and pressure conditions causing water to vaporize, and the formation of a protective film on the surface of the formed native aluminum. The process of native aluminum formation in the sedimentary rocks of oil-and-gas-bearing deposits of the Dnipro-Donetsk Rift described in this work, as well as its findings in other basins indicates the typical character of this process for rift structures of hydrocarbon accumulation. It was assumed, that the oil-and-gas-bearing structure of Dnipro-Donetsk Rift is mantle origin and represents a giant source of deep hydrogen. Some of this hydrogen is consumed to form hydrocarbon accumulations, including known oil and gas deposits, and some of it degasses into the uppermost layers of the Earth’s crust. Independent hydrogen fields can also form there, as was the case during the formation of the deposit of geological hydrogen in Mali. It was shown, that the presence of hydrocarbons in the fluids does not affect the processes associated with aluminum. The results obtained indicate significant flows of hydrogen from the mantle to the upper horizons of the Earth’s crust. Thus, native aluminum, as well as other native oxyphilic metals in sedimentary rocks of oil-and-gas bearing basins is a search marker of both hydrocarbon accumulations and the important role of deep geological hydrogen in the formation of these accumulations and its possible accumulation in the most reliable traps.

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“…Macro observation will give information on the presence of galvanic corrosion, gap, and pitting. SEM-EDX provides information on the effect of chloride ion to carrion product [18].…”

Section: Aging Management Strategymentioning

confidence: 99%

Aging management experience to support reliability of RSG-GAS operation and future NPP in Indonesia

Hastuti

Bakhry

Sihombing

et al. 2022

J. Phys.: Conf. Ser.

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The aging process will cause a decrease in the reliability and safety performance of the nuclear reactor operation. As a consequence, the quality of service to stakeholders will decline. In order to keep nuclear reactor reliable, systematic activities are needed to manage the aging process that occurs at the GA Siwabessy multi-purpose reactor (RSG-GAS), in Serpong. The activity includes 4 main elements, i.e.: understanding and evaluating the aging process, using aging prevention methods, detection and surveillance methods, and aging mitigation methods. Aging management is carried out at RSG-GAS through routine and periodic maintenance, repair, replacement and monitoring mechanisms. Aging management must be planned from design, construction and commissioning activities to reactor operation. RSG-GAS aging management is carried out in accordance with safety guidelines from the international atomic energy agency (IAEA) and nuclear power regulatory body (BAPETEN) regulations, as well as various vendor documents. The success of aging management is demonstrated by operating parameters that meet operating limit conditions (OLC), and is evaluated through periodic safety assessments. This paper aims to convey the experience of RSG-GAS in aging management, in order to support the reliable operation of RSG-GAS. Experience in the aging management program of the RSG-GAS as long as 34 years, is an important asset in developing the aging management program of future Indonesian nuclear power plants.

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Study on Pitting Corrosion of AlMg2 in Solution Containing Chloride

Cited by 5 publications

References 9 publications

Evaluation on Structure, System, and Component Qualification in the Periodic Safety Review of RSG-GAS

Evaluation on Structure, System, and Component Qualification in the Periodic Safety Review of RSG-GAS

Native aluminum as indicator of hydrogen degassing in the formation of hydrocarbon fields

Aging management experience to support reliability of RSG-GAS operation and future NPP in Indonesia

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