Radiation Chemistry of Radioactive Nitrogen Species in BWR Reactor Cores

Ibe, Eishi; Karasawa, Hidetoshi; Uchida, Shunsuke

doi:10.1080/18811248.1991.9731367

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…Hydropower plants, which employ dams and other methods to create energy in moving water, rely heavily on water. The flowing water drives the rotating blades, which spin a generator, and mechanical energy is converted into electrical energy by the spinning of turbines [3][4][5][6][7][8][9][10][11][12][13]. Hydroelectric power generates a significant amount of the world's electricity.…”

Section: Water Utilization In Electric Power Generationmentioning

confidence: 99%

Water Chemistry in Nuclear Power Plant

Nur Salam,

Rokonuzzaman

2023

Nuclear Power Plants - New Insights

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Water quality has long been an important part of the operation of nuclear power plants. Water is used as a working and cooling fluid in power plants. The quality of source waters to be used in the power plants after treatment should conform to the prescribed values of Physicochemical properties like pH, EC, TDS, alkalinity, hardness, presence of chloride content, silica, and heavy metals as recommended by technical guidelines. The Physicochemical properties of water must be recovered the recommended values of the World Health Organization (WHO), United States of Public Health (USPH), and power plant water chemistry guidelines. But the values of raw water are very far from the recommended values of Nuclear Power Plants operation. So, it needs to treat to use in the boilers. Gravitation, Carbon filtration, Ion exchange method, and Reverse Osmosis (RO) are good ways to treat the water before use in power plants. The aim of this chapter is to explore the water chemistry of the source water quality parameters values and those of the recommended values of technical guidelines.

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Section: Water Utilization In Electric Power Generationmentioning

confidence: 99%

Water Chemistry in Nuclear Power Plant

Nur Salam,

Rokonuzzaman

2023

Nuclear Power Plants - New Insights

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“…This isotope is transported to components located outside the core raising dose levels around them during reactor operation. Some of the reactors whose ex-core components would contain high levels of 16 N include boiling water reactors (BWR) [1], gas cooled reactors, pool in tank research reactors [2] and the proposed supercritical water cooled reactors (SCWR) [3]. It is a requirement that ex-core components with large quantities of this isotope should be entombed in a heavy shield to protect personnel during reactor operation [2,4,5].…”

Section: Introductionmentioning

confidence: 99%

Investigation of photoneutron and capture gamma-ray production in Pb and W under irradiation from 16N decay radiation

Kebwaro

Zhao

2015

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tLead and tungsten are potential alternative materials for shielding reactor ex-core components with high 16 N activity when available space limits application of concrete. Since the two materials are vulnerable to photonuclear reactions, the nature and intensity of the secondary radiation resulting from (c,n) and (n,c) reactions when 16 N decay radiation interact with these materials need to be well known for effective shielding design. In this study the MCNP code was used to calculate the photoneutron and capture gamma-ray spectra in the two materials when irradiated by 16 N decay radiation. It was observed that some of the photoneutrons generated in the two materials lie in the low-energy range which is considered optimum for (n,c) reactions. Lead is more transparent to the photoneutrons when compared to tungsten. The calculations also revealed that the bremsstrahlung generated by the beta spectrum was not sufficient to trigger any additional photoneutrons. Both energetic and less energetic capture gamma-rays are observed when photoneutrons interact with nuclei of the two materials. Depending on the strength of the 16 N source term, the secondary radiation could affect the effectiveness of the shield and need to be considered during design.

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“…However, in the optimal hydrogen concentration deter- [16] [18][19][20]. The models were extended to understand 16 N behaviors in the reactor water and main steam line [21].…”

Section: Bwr Primary Cooling Systemmentioning

confidence: 99%

Water chemistry technology – one of the key technologies for safe and reliable nuclear power plant operation

Uchida

Katsumura

2013

Journal of Nuclear Science and Technology

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Water chemistry control is one of the key technologies to establish safe and reliable operation of nuclear power plants. Continuous and collaborative efforts of plant manufacturers and plant operator utilities have been focused on optimal water chemistry control, for which, a trio of requirements for water chemistry should be simultaneously satisfied: (1) better reliability of reactor structures and fuel rods; (2) lower occupational exposure and (3) fewer radwaste sources. Various groups in academia have carried out basic research to support the technical bases of water chemistry in plants. The Research Committee on Water Chemistry of the Atomic Energy Society of Japan (AESJ), which has now been reorganized as the Division of Water Chemistry (DWC) of AESJ, has played important roles to promote improvements in water chemistry control, to share knowledge about and experiences with water chemistry control among plant operators and manufacturers and to establish common technological bases for plant water chemistry and then to transfer them to the next generation of plant workers engaged in water chemistry. Furthermore, the DWC has tried and succeeded arranging R&D proposals for further improvement in water chemistry control through roadmap planning. In the paper, major achievements in plant technologies and in basic research studies of water chemistry in Japan are reviewed. The contributions of the DWC to the longterm safe management of the damaged reactors at the Fukushima Daiichi Nuclear Power Plant until their decommissioning are introduced.

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Radiation Chemistry of Radioactive Nitrogen Species in BWR Reactor Cores

Cited by 6 publications

References 8 publications

Water Chemistry in Nuclear Power Plant

Water Chemistry in Nuclear Power Plant

Investigation of photoneutron and capture gamma-ray production in Pb and W under irradiation from 16N decay radiation

Water chemistry technology – one of the key technologies for safe and reliable nuclear power plant operation

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