NRC Job Code V6060: Extended in-situ and real time monitoring. Task 4: Detection and monitoring of leaks at nuclear power plants external to structures

Sheen, S.H.

doi:10.2172/1048633

Cited by 2 publications

(6 citation statements)

References 11 publications

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“…Monitoring tritium level in groundwater helps to detect the leaks of underground piping as reported the more tritium level in one of the wells around the Velmont Yankee nuclear power station, where buried piping leaks were found [5]. Similar problems were reported in the detection of radioactive tritium in the groundwater of the more than 48 commercial US nuclear power stations [5]. Obviously, one of the safety requirements at a nuclear power plant is the close monitoring of the tritium level in underground water.…”

Section: Introductionmentioning

confidence: 85%

“…Their primary decay modes are only beta-emitting (Tritium, Nickel-63, and Strontium-90) and beta-gamma emission related to some radionuclide such as Cobalt-60, Iodine-129, Cesium-134, and Cesium-137, while some of them are alpha-emitting such as Plutonium-239. Tritium contaminated water in a nuclear power plant is regularly diluted, resulting, normally the radiation level in groundwater must be less than drinking water tritium level [5]. Monitoring tritium level in groundwater helps to detect the leaks of underground piping as reported the more tritium level in one of the wells around the Velmont Yankee nuclear power station, where buried piping leaks were found [5].…”

Section: Introductionmentioning

confidence: 99%

“…Tritium contaminated water in a nuclear power plant is regularly diluted, resulting, normally the radiation level in groundwater must be less than drinking water tritium level [5]. Monitoring tritium level in groundwater helps to detect the leaks of underground piping as reported the more tritium level in one of the wells around the Velmont Yankee nuclear power station, where buried piping leaks were found [5]. Similar problems were reported in the detection of radioactive tritium in the groundwater of the more than 48 commercial US nuclear power stations [5].…”

Section: Introductionmentioning

confidence: 99%

“…Gallium-arsenide (GaAs) photodiode for detection of Strontium is a novel detection method and being a potential for direct, in situ beta detection for nuclear decommissioning application [6]. However, this new sensor technology using solid-state detectors, may not be applicable to detect low energy of the beta particles emitted by tritium [5]. These solid-state detectors have several disadvantages like being expensive and radiation damage results in noise in the detector and can negatively affect the counting statistics [6].…”

Section: Introductionmentioning

confidence: 99%

“…The existing novel detectors are expensive, poor for the detection of a low energy beta, and negatively affected by the radiation. Therefore, it is necessary to develop a new detector with potential for in situ, cost-effective, real-time monitoring in groundwater and more mobile detector which have not been well developed [5]. In this research, an alpha-beta-gamma detector system will be investigated using Monte Carlo simulation to fill the needs of the nuclear industry.…”

Section: Introductionmentioning

confidence: 99%

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Geant4 investigation of the alpha-beta-gamma detector system used in medical imaging, environmental and nuclear site monitoring

Yavuzkanat

Jenkins

2021

Cumhuriyet Science Journal

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No commercially available detector system can measure alpha, beta and gamma-rays at the same time and separately with good efficiency, while being cost-effective, portable and offering real-time monitoring. The main purpose of an alpha-beta-gamma detector would be for safety management and nuclear decommissioning in the nuclear industry. This idea for a detector system became more valuable, after Fukushima in Japan, because nuclear waste can contain fission products and transactinide materials which not only emit gamma-rays but also emit alpha and beta particles and in some cases, neutrons. In this research, we investigated the best available alpha-beta-gamma radiation detector materials and their optimum thickness by using Geant4 based GATE simulation. The work revealed a better efficiency result for each radiation type than in previous work. In the simulation, 0.05 mm ZnS(Ag), 3.2 mm plastic scintillator and 1.75 mm BGO were found to be best for the detection and identification of alpha, beta and gamma-rays respectively. In nuclear medicine, this type of detector system could also modify to become a miniaturized radio-guided surgery beta-gamma probe beside of the modification into the robotic surgery. This research result will influence three different areas in imaging technology, homeland security and nuclear industry.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Geant4 investigation of the alpha-beta-gamma detector system used in medical imaging, environmental and nuclear site monitoring

Yavuzkanat

Jenkins

2021

Cumhuriyet Science Journal

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Preventing Tritium Memory Effects in Ion Chambers Using Ultraviolet LEDs

Larsen

Nguyen

Murph

2022

IEEE Trans. Nucl. Sci.

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Ion chambers are often employed to measure the concentration of tritium within flowing gases. In real world environments the active surfaces of ion chambers become covered with tritiated surface contaminants. This tritiated surface contamination often creates a large background response that can mask the signature of interest, which is the tritium concentration in the gas phase. Previous efforts to reduce the effects of surface contamination in ion chambers utilize inert coatings (e.g., gold) and low surface area electrodes (e.g., wire mesh). These strategies only reduce the effect and do not provide information regarding the ratio of the current from the contaminated surface to the current from the volume of the detector. Additionally, gold coating is expensive, substantially increasing the cost of the instrument. While ion chambers may be periodically cleaned, this recurring hands-on task does not adequately address tritium level ambiguities in gloveboxes and increases the risk of detector damage and worker exposure. An ideal solution to this issue would be to either develop an ion chamber that does not accrue surface contamination, or one that is self-cleaning while it is in operation. In this report we describe the development of using ultraviolet (UV) LED light illumination to desorb contamination from ion chambers while they are in operation, preventing the negative effects of surface contamination.

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NRC Job Code V6060: Extended in-situ and real time monitoring. Task 4: Detection and monitoring of leaks at nuclear power plants external to structures

Cited by 2 publications

References 11 publications

Geant4 investigation of the alpha-beta-gamma detector system used in medical imaging, environmental and nuclear site monitoring

Geant4 investigation of the alpha-beta-gamma detector system used in medical imaging, environmental and nuclear site monitoring

Preventing Tritium Memory Effects in Ion Chambers Using Ultraviolet LEDs

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