scholarly journals Local Residents' Perception Analysis of Nuclear Power after the Thyroid Cancer Damage Lawsuit Adjacent to the Nuclear Plant

2016 ◽  
Vol 10 (8) ◽  
pp. 583-590
Author(s):  
Jae-Heon Lee ◽  
Jung-Hoon Kim
Keyword(s):  
Thyroid Cancer ◽  
Nuclear Power ◽  
Nuclear Plant ◽  
Local Residents ◽  
Perception Analysis

Safety Justification Strategy for the Implementation of Additive Manufacture Small-Bore Globe Valves for Nuclear Plant

2021 ◽  
Author(s):  
Bill Press ◽  
Adam Dukes ◽  
Dave Poole ◽  
Jack Adams ◽  
Luke Burling ◽  
...  
Keyword(s):  
Power Generation ◽  
Nuclear Power ◽  
Performance Testing ◽  
Nuclear Plant ◽  
Raw Material ◽  
Additive Manufacture ◽  
Lead Times ◽  
Materials Testing ◽  
Thermal Tests ◽  
Pressure Testing

Abstract The Additive Manufacture (AM) of nuclear plant components, such as small-bore globe valves, offers opportunities to reduce costs and improve production lead-times. Cost reductions can be achieved by reducing raw material quantities, removing machining operations, and eliminating the welding of sub-assemblies. Furthermore, there is the opportunity to reduce production lead-times by simplifying the supply chain, e.g. reducing the number of parts to be sourced and eliminating special operations. Such opportunities are important against a backdrop of industry striving to reduce the cost of nuclear power generation in order to ensure viability with other forms of power generation. However, AM is a relatively new and innovative manufacturing technology, and although now seeing greater use in industry, there are still very few examples of where the technology has been applied to components used in safety critical applications. Furthermore, it is not covered by the American Society of Mechanical Engineers (ASME), Section III, nuclear design code. For nuclear plant applications, it is imperative a robust safety justification is provided. This paper presents Rolls-Royce’s approach to provision of a high integrity safety justification to enable the implementation of AM small-bore globe valves, up to a nominal bore size of 2” to nuclear plant. The material of construction is AM Laser Powder Bed Fusion (LPBF) 316LN stainless steel, with a Hot Isostatic Press (HIP) bonded LPBF Tristelle 5183 low cobalt hard facing seat. The paper describes the structure of the safety justification, which follows a multi-legged approach. It provides an overview of the innovative manufacturing process, which is, to the best of Rolls-Royce’s knowledge, the first of a kind application on nuclear pressure boundary components. The paper provides a summary of the suite of materials testing and metallurgical examinations conducted, and majors on prototype functional and performance testing where comparisons are made with the previous forged form. Pressure testing is covered which includes ultimate pressure testing to 2,000 bar, as well as: functional cyclic testing, hard facing bond strength tests, dynamic loading (shock), and cyclic thermal tests. In all cases the additive manufactured small-bore globe valves performed as well, and in some cases better than the forged material equivalent.

scholarly journals Molecular pathogenetic aspects in the diagnosis of thyroid cancer

1995 ◽  
Vol 41 (6) ◽  
pp. 42-47
Author(s):  
Ye. A. Troshina ◽  
G. A. Gerasimov ◽  
G. F. Alexandrova
Keyword(s):  
Thyroid Cancer ◽  
Nuclear Power ◽  
Current Knowledge ◽  
Malignant Neoplasms ◽  
X Ray ◽  
Tumor Diseases ◽  
Exogenous Factors ◽  
Molecular Aspects ◽  
The One ◽  
Diagnosis Of Thyroid Cancer

Thyroid cancer accounts for 1 - 1.5% of all malignant neoplasms. In recent years, there has been a trend towards an increase in the prevalence of this disease. On the one hand, the frequency of detection of thyroid cancer is associated with the introduction of a number of modern methods of examining patients and the increased oncological alertness of doctors. On the other hand, there is evidence of an increase in the incidence of thyroid cancer associated with an unfavorable environmental situation. An example of this is an increase in the frequency of thyroid damage in people exposed to radiation after the accident at the Chernobyl nuclear power plant. There is evidence that in Japan, thyroid cancer is detected 10 times more often among the population that has undergone nuclear bombing than among other residents of the country. Exogenous risk factors include external x-ray irradiation, previously carried out for medical purposes for various benign and non-tumor diseases of the head and neck. It is believed that exogenous factors are able to more or less affect the thyroid gland and cause a number of molecular changes in it that lead to the development of cancer. The purpose of this review was to summarize the current knowledge of the molecular aspects of thyroid cancer.

scholarly journals Impact of repeated dose of stable iodine in an in utero rat model using a metabolomic approach

2019 ◽  
Vol 14 ◽  
pp. 06007
Author(s):  
Clément Rosique ◽  
Dalila Lebsir ◽  
Maâmar Souidi ◽  
Jean-Charles Martin
Keyword(s):  
Thyroid Cancer ◽  
High Risk ◽  
Power Plant ◽  
Nuclear Power ◽  
Radioactive Iodine ◽  
Repeated Administration ◽  
Undesirable Effect ◽  
Extended Exposure ◽  
Metabolomic Approach ◽  
Stable Iodine

The Fukushima nuclear power plant blast resulted in the release of 131Iodine for several weeks. This unexpected issue challenged the iodin doctrine [1], in which the counter-measure is to provide a unique iodine tablet to saturate thyroid during the radioactive contamination not expected to last more than several hours. A new doctrine must be implemented to take into account such case of extended exposure based on repeated iodine administration with adapted dosage. But repeated administration of iodine can block the thyroid [2] and few scientific evidences regarding repeated iodine administration (and its potential undesirable effect) are at our disposal [3]. Moreover, unborn and young children are at high risk during a nuclear incident: it is currently recognized that one of the risks of exposure to radioactive iodine is the development of thyroid cancer, especially when exposure occurred during childhood [4]. Their protection is a main priority. Our goal was to evaluate the potential undesirable effects of such repeated iodine administration in the offspring using an untargeted metabolomic approach on a rat reproductive model.

New Generation of Diamond Toolings for Facilitating Decommissioning Operations

2011 ◽  
Author(s):  
Claude Besson ◽  
Erico Mariotti ◽  
Alexandre Mouysset ◽  
Lorenz zur Nedden ◽  
Bernard Delannay
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Nuclear Plant ◽  
Diamond Tools ◽  
Nuclear Decommissioning ◽  
Specialized Equipment ◽  
New Generation

Diamond tools are well proven cutting, drilling and grinding technologies in many applications but need to be specifically optimized and adapted for the complex and varied structures of nuclear power plant in view of decontamination and decommissioning. The proper development and use of diamond tools in these extreme and complex conditions can only be achieved thanks to the combined talent of experienced nuclear plant contractors, engineers, technicians, operators of diamond tools, and the use of specialized equipment. This present paper is an overview of the possible applications of diamond tools in the different operations of Nuclear Decommissioning and Decontamination.

Design Concept of Composite Module for Nuclear Power Plant Construction

2004 ◽  
Author(s):  
Taihei Yotsuya ◽  
Kouichi Murayama ◽  
Jun Miura ◽  
Akira Nakajima ◽  
Junichi Kawahata
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Large Scale ◽  
Construction Method ◽  
Nuclear Plant ◽  
Small Scale ◽  
Modular Construction ◽  
Plant Construction ◽  
Composite Module

A composite module construction method is to be examined reflecting one of the elements of construction rationalization of a future nuclear plant planned by Hitachi. This concept is based on accomplishments and many successes achieved by Hitachi through application of the modular construction method to nuclear power plant construction over 20 years. The feature of the composite module typically includes a planned civil structure, such as a wall, a floor, and a post, representing modular components. In this way, an increased level of rationalization is expected in the conventional large-scale nuclear plants. Furthermore, the concept aiming at the modularization of all the building parts comprising medium- or small-scale reactors is also to be examined. Additional aims include improved reductions in the construction duration and rationalization through use of the composite module. On the other hand, present circumstances in nuclear plant construction are very pressing because of economic pressures. With this in mind, Hitachi is pursuing additional research into the introduction of drastic construction rationalization, such as the composite module. This concept is one of the keys to successful future plant construction, faced with such a severe situation.

Analysis of Cured-in-Place Piping for a Nuclear Plant Application

2011 ◽  
Author(s):  
Alton Reich ◽  
Victor Newman ◽  
Roberto Di Salvo ◽  
John Charest
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Analytical Approach ◽  
Structural Integrity ◽  
Nuclear Plant ◽  
Operating Pressure ◽  
Repair Technique ◽  
Pressure Pipe ◽  
Case Basis ◽  
Design Challenges

Cured-in-place piping (CIPP) is used to repair existing pressure pipe that has compromised structural integrity and is no longer capable of holding operating pressure without leaking. It is often used to repair buried piping where digging the piping up to replace it would be inconvenient and/or cost prohibitive. CIPP is routinely used to repair water and sewer lines, and an ASTM specification exists to guide the design of the pipe repair for these applications. CIPP can also be used as a repair technique for piping at nuclear power plants; however, such use must be approved on a case-by-case basis. This paper discusses some of the design challenges associated with designing the CIPP for a nuclear plant application. It presents an overview of the analytical approach and the results.

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