Radiation effects on organic materials in nuclear plants. Final report

Bruce, M B; Davis, Marguerite

doi:10.2172/5591289

Cited by 14 publications

(4 citation statements)

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“…To bridge the accelerated and prototypical conditions, the empirical "equal dose-equal damage" concept was initially utilized to establish the threshold of radiation damage (Schönbacher and Stolarz-Izycka, 1979;Bruce and Davis, 1981). However, this approach was soon shown to underpredict the embrittlement of a polyethylene insulation on the power control wiring of the Savanah River K-reactor at Aiken, South Carolina (Clough and Gillen, 1982).…”

Section: Degradation Mechanisms and Predictabilitymentioning

confidence: 99%

Review of qualification and modeling for radiation-induced polymer degradation

Chen,

Chang,

Konstanczer

et al. 2023

Front. Nucl. Eng.

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Polymeric materials have multiple potential applications in nuclear power reactors including advanced and small modulus reactors, in addition to their extensive usage in safety electronic cables in the existing light water reactors. Through the qualification programs, knowledge accumulates about the polymer degradation kinetics under gamma-irradiation environment to facilitate the development of service-life predictive models. This paper aims to promote mechanistic-based predictability as a new approach to the qualification of polymeric components. Reviewed in this article are the current qualification standards and procedures, the current understandings of the degradation mechanisms, and kinetic models applicable to accelerated experiments for qualification.

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Section: Degradation Mechanisms and Predictabilitymentioning

confidence: 99%

Review of qualification and modeling for radiation-induced polymer degradation

Chen,

Chang,

Konstanczer

et al. 2023

Front. Nucl. Eng.

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“…For example, organic polymers and oils may (depending on the specific compound) degrade by mechanisms that physically weaken the polymer and may cause outgassing of product molecules, some of which may be corrosive gases. Historically, research organisations such as the European Organization for Nuclear Research (CERN) [12,13] and Electric Power Research Institute (EPRI) [14] commissioned review summaries of material performance. However, the development of novel copolymers and the ever-evolving formulation of polymer additives mean that those summaries are no longer comprehensive.…”

Section: Environmental Factorsmentioning

confidence: 99%

Robotic Development for the Nuclear Environment: Challenges and Strategy

2020

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Improvements in robotics and artificial intelligence have enabled robotics to be developed for use in a nuclear environment. However, the harsh environment and dangerous nature of the tasks pose several challenges in deploying robots. There may be some unique requirements for a nuclear application that a commercial system does not meet, such as radiation effects, the needs remote maintenance and deployment constraints. This paper reviews the main challenges that robots need to face to be deployed in a nuclear environment, examines the development and assessment processes required in the nuclear industry, and highlights the assistance that is available for developers. Due to comparable environments and operating restrictions, the development process employed by the nuclear industry has a similar structure as that employed by NASA and the ESA for space exploration. The nuclear industry has introduced a number of development support programs, such as Innovate and Game Changers, to fund and mentor developers through the initial design stages to proving viability in a representative independently assessed test environment. Robust and reliable technologies, which may also have application beyond the original nuclear application, are being successfully developed and tested, enabling robotics in making nuclear operations safer and more efficient. Additional development sources are given in the text.

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“…For commonly used adsorbents such as ion exchange resins, irradiation damage depends on the type of materials and the dose adsorbed. Irradiation damage was found to start at doses ranging between 1 kGy and 10 MGy under gamma irradiation, depending on the nature of the resin [23][24]. Therefore, the behavior of these materials towards irradiation requires investigation and understanding of the reaction mechanisms at play.…”

Section: Introductionmentioning

confidence: 99%