Development and Application of the Device for Cutting and Disintegration of Radioactive Contamination Glove Box

2017 ◽  
Author(s):  
Zhang Feng ◽  
Qu Weibo ◽  
Jiang Hong ◽  
Yao Dongmei ◽  
Yu Dongqiang ◽  
...  
Keyword(s):  
Subsequent Treatment ◽  
Test Results ◽  
Nuclear Facility ◽  
Nuclear Facilities ◽  
High Concentration ◽  
Cutting Operation ◽  
Design Requirements ◽  
Verification Test ◽  
Treatment And Disposal ◽  
Different Parts

In the process of decommissioning of the nuclear facilities, abandoned and contaminated equipments or devices often need to be dismantled and cut into proper pieces in order to facilitate subsequent treatment and disposal. Since the nuclear facilities were places where radioactive operations were frequently executed, gloveboxes should be such typical abandoned and contaminated devices. Usually, gloveboxes were cut into proper pieces by kinds of tools which was chosen depending on the thickness of stainless steel from different parts of gloveboxes. This traditional cutting was laborious and high concentration of harmful aerosols and gases would be created during the cutting operation. In order to develop more advanced cutting and disintegration ways, a cutting and disintegration device was developed using abandoned and contaminated gloveboxes as operation objects in this work. During the design of this device, the operation convenience, operation exactitude and the protection for operators were fully considered. Also, the hot verification test was carried out. Based on the verification test results, the cutting and disintegration device was reliable and could meet the design requirements, which precisely executed various movements required in the hot verification test. Due to the application of remote operation and advanced cold cutting as the main cutting way in the development of this cutting and disintegration device, radioactive aerosols and harmful gases created during operation of this device were obviously declined compared to past cutting devices, which was of great importance to the health of operators. This work can provide technical support for the development of other similar devices applied in nuclear facility decommissioning.

Application Research of Wireless Communication Technology in Remote Meter Reading System

2014 ◽  
Vol 513-517 ◽  
pp. 1494-1498 ◽  
Author(s):  
Zhang Hong ◽  
Jun Jie Wang ◽  
Ai Sheng Ma
Keyword(s):  
Circuit Design ◽  
Test Results ◽  
Application Research ◽  
Remote Transmission ◽  
Zigbee Technology ◽  
Design Requirements ◽  
Terminal Design ◽  
Reading System ◽  
Hardware Circuit ◽  
Data Terminal

In view of the problems in the current domestic and international remote wireless meter reading system, propose the remote wireless meter reading terminal system based on ZigBee technology combined with GPRS technology, carry out the hardware circuit design of each module, establish ZigBee wireless meter reading network based on 802.15.4 layer networking protocol, design a more practical remote wireless meter reading protocol and data transmission format. Test results show that it has realized the formation of ZigBee network, collection and remote transmission of meter data, terminal equipment parameters modification and other functions to achieve the terminal design requirements.

Handling Multiple Objectives in Decentralized Design

2005 ◽  
Author(s):  
Vincent Chanron ◽  
Kemper Lewis ◽  
Yayoi Murase ◽  
Kazuhiro Izui ◽  
Shinji Nishiwaki ◽  
...  
Keyword(s):  
Complex Systems ◽  
Design Solution ◽  
Distributed Environments ◽  
Engineering Systems ◽  
Design Problems ◽  
Design Requirements ◽  
Decentralized Design ◽  
Set Based Design ◽  
Standard Techniques ◽  
Different Parts

Most complex systems, including engineering systems such as cars, airplanes, and satellites, are the results of the interactions of many distinct entities working on different parts of the design. Decentralized systems constitute a special class of design under distributed environments. They are characterized as large and complex systems divided into several smaller entities that have autonomy in local optimization and decision-making. A primary issue in decentralized design processes is to ensure that the designers that are involved in the process converge to a single design solution that is optimal and meets the design requirements, while being acceptable to all the participants. This is made difficult by the strong interdependencies between the designers, which are usually characteristic of such systems. This paper proposes a critical review of standard techniques to modeling and solving decentralized design problems, and shows mathematically the challenges created by having multiobjective subsystems. A method based on set-based design is then proposed to alleviate some of these challenging issues. An illustration of its applicability is given in the form of the design of a space satellite.

scholarly journals Remote Monitoring and Evaluation of Damage at a Decommissioned Nuclear Facility Using Acoustic Emission

2018 ◽  
Vol 8 (9) ◽  
pp. 1663 ◽  
Author(s):  
Marwa Abdelrahman ◽  
Mohamed ElBatanouny ◽  
Kenneth Dixon ◽  
Michael Serrato ◽  
Paul Ziehl
Keyword(s):  
Acoustic Emission ◽  
Remote Monitoring ◽  
Nuclear Reactor ◽  
Corrosion Damage ◽  
Monitoring And Evaluation ◽  
Structural Condition ◽  
Spent Fuel ◽  
Nuclear Facility ◽  
Nuclear Facilities ◽  
Accelerated Corrosion

Reinforced concrete systems used in the construction of nuclear reactor buildings, spent fuel pools, and related nuclear facilities are subject to degradation over time. Corrosion of steel reinforcement and thermal cracking are potential degradation mechanisms that adversely affect durability. Remote monitoring of such degradation can be used to enable informed decision making for facility maintenance operations and projecting remaining service life. Acoustic emission (AE) monitoring has been successfully employed for the detection and evaluation of damage related to cracking and material degradation in laboratory settings. This paper describes the use of AE sensing systems for remote monitoring of active corrosion regions in a decommissioned reactor facility for a period of approximately one year. In parallel, a representative block was cut from a wall at a similar nuclear facility and monitored during an accelerated corrosion test in the laboratory. Electrochemical measurements were recorded periodically during the test to correlate AE activity to quantifiable corrosion measurements. The results of both investigations demonstrate the feasibility of using AE for corrosion damage detection and classification as well as its potential as a remote monitoring technique for structural condition assessment and prognosis of aging structures.

scholarly journals Service Life Prediction of Shaft Sidewall Exposed to Sulfate Environment

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Wei He ◽  
Xia Meng ◽  
Ji-hui Zhao
Keyword(s):  
Life Prediction ◽  
Laboratory Tests ◽  
Residual Life ◽  
Underground Water ◽  
Corrosion Mechanism ◽  
Research Subject ◽  
High Concentration ◽  
Degradation Model ◽  
Immersion Corrosion ◽  
Different Parts

Under the influence of underground water with high concentration of sulfate, several vertical shafts in the Huang-Huai region are seriously corroded but have varying degradation degrees in different parts. Taking the auxiliary shaft of Lin-Huan coal mine as the research subject, the mechanism of this phenomenon was studied. Then, wet-dry alternated and immersion corrosion tests were carried out, and it was found that only the dry-wet alternated accelerate test is representative of the corrosion mechanism that cause the corrosion in the shaft. However, it will cost much time and money for the laboratory test to reach the same degradation depth. To solve this problem, combining with field and laboratory tests, a modified theoretical degradation model was developed to evaluate the residual life of the corroded sidewall. The results indicate that the residual life of the shaft sidewall is 25 years, and the damaged parts have no need for an immediate reinforcement.

Design and Test of Double Row Dibbling Wheel Precise Seeder for Membrane Covering the Whole of Double Furrow Planting Corn

2013 ◽  
Vol 850-851 ◽  
pp. 377-380 ◽  
Author(s):  
Jie Yang ◽  
Wu Yun Zhao ◽  
Fei Dai
Keyword(s):  
Field Test ◽  
Test Results ◽  
Double Row ◽  
Improve Efficiency ◽  
Design Requirements

This machine was for membrane covering the whole of the double furrow sowing technology and designed. They were designed to meet membrane covering the whole of the double furrow sowing technology agronomic requirements of the premise, but also to meet planting can improve efficiency, stable, reliable and cost requirements. For the above requirements, the machine used double Dibble wheel structure; field test results show that the aircraft meet the design requirements and agronomic requirements.

The Design of Patrol System Based on Image Acquisition

2013 ◽  
Vol 860-863 ◽  
pp. 2902-2905
Author(s):  
Guo Xin Li ◽  
Jian Wei Lu
Keyword(s):  
Image Acquisition ◽  
Control Unit ◽  
Central Control ◽  
Test Results ◽  
Patrol Officers ◽  
Central Control Unit ◽  
Design Requirements ◽  
Live Image ◽  
Design Ideas ◽  
Time Image

This article presents the design ideas of patrol system based on real-time image acquisition in patrol points. In this system, the image acquisition terminals are mounted on many patrol points, which are set in a predetermined patrol line. When patrol officers arrived at a patrol point, the image acquisition terminal mounted on the patrol point will capture a live image via a GPRS MMS module ,and then the image acquisition terminal sends this image to the central control unit in a form of MMS. The central control unit receives the sent MMS message, and separate out the image information from the received message, and then saves it to a database. According to the actual test results of this patrol system, it can not only meet the design requirements, but also the whole system has a high stability and reliability.

Changes in management and survival outcomes for patients receiving gene-expression-based tissue-of-origin test results for difficult-to-diagnose primary cancers.

2012 ◽  
Vol 30 (4_suppl) ◽  
pp. 397-397 ◽  
Author(s):  
John C. Hornberger ◽  
Gauri R. Varadhachary ◽  
Hialy R Gutierrez ◽  
William David Henner ◽  
Shawn Becker ◽  
...  
Keyword(s):  
Gene Expression ◽  
Median Survival ◽  
Treatment Recommendations ◽  
Subsequent Treatment ◽  
Survival Outcomes ◽  
Test Results ◽  
Extensive Evaluation ◽  
Tissue Of Origin ◽  
One Year

397 Background: An important step for a novel test is assessing its clinical utility and real-world effect on diagnosis and patient management. This report describes completed results of a cohort of physicians who have ordered a gene expression profile assay for identification of tumor tissue of origin (Pathwork Tissue of Origin Test) for patients with difficult-to-diagnose primary cancers and their subsequent treatment and survival. Methods: The IRB-approved registry collected data from participating physicians who have ordered the Tissue of Origin test. A detailed interview was conducted using both a web-based questionnaire and a confirmatory telephone interview with the physicians. Chart survey included collection of data on patient demographics, diagnostic procedures including imaging and immunohistochemistry as well as therapy. The physicians were queried regarding their working diagnoses and treatment recommendations prior to and after Tissue of Origin Test result availability. Date of death was also obtained with a minimum of one year follow-up from date of biopsy. Results: One hundred seven patients (61 women) have been studied and 65 participating physicians have completed the interview. Results indicate that most patients underwent extensive evaluation (≥ 10 IHC) prior to gene expression analysis. After receiving test results, physicians changed the primary site diagnosis for 53 patients (50%, CI [43,58%]; p<.001) and changed the treatment management for 72 patients (65%, CI [58%,73%]; p<.0001). At last follow-up, 69 patients had died with a median survival of 426 days. More than 30% of patients were alive at 1000 days. Conclusions: This registry study confirms that in patients with difficult-to-diagnose primary cancers, extensive baseline diagnostics are common and less than half of the patients have an established working diagnosis. Results indicate that the Tissue of Origin Test led to a change in working diagnosis and changed treatment recommendations in over half the patients. Survival outcomes compare favorably to historical controls in treatment trials where median survival is generally less than one year.

The Comprehensive Evaluation for Nuclear Facility Decommissioning Scheme Based on AHP-DEA Method

2017 ◽  
Author(s):  
Lu Bai ◽  
Yong-kuo Liu ◽  
Nan Chao
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Analytic Method ◽  
Nuclear Facility ◽  
Nuclear Facilities ◽  
Program Selection ◽  
Proposed Model ◽  
Dea Method ◽  
Scheme Selection ◽  
Selection Of

In view of the lack of research on decommissioning scheme selection of nuclear facilities and the inability to directly use the evaluation model of existing non-radioactive environment construction schemes. In this paper, propose a task analytic method in radiation field based on AHP-DEA model, which takes accomplishment the task safety as the decision-making target. The evaluation model can both reflect the decision preference of experts and improve the rationality of evaluation by mathematical calculation. The experimental results show that the proposed model has obvious advantages for program selection and can be applied to the evaluation and optimization of decommissioning scheme.

Air Stripping of Ammoniacal Nitrogen from Fecal Sewage Using a Fluidized Bed

2014 ◽  
Vol 926-930 ◽  
pp. 4209-4213
Author(s):  
An Feng Li ◽  
Yan Ying Ning ◽  
Wen Jiang Xu ◽  
Tao Pan
Keyword(s):  
Mass Transfer ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Subsequent Treatment ◽  
High Mass ◽  
Ammoniacal Nitrogen ◽  
High Concentration ◽  
Air Stripping ◽  
High Concentrations ◽  
Removal Technique

High concentrations of ammoniacal nitrogen in fecal sewage pose a great threat to subsequent treatment steps. The conventional removal technique in China mainly involves air stripping. However, the concentration of ammonia in the effluent is often very high, and the fillers in towers could exhibit scaling resulting in reduced lifetime in operation. Because of its high mass transfer characteristics, fluidized bed technology was used in our study of the air stripping method for improving the removal efficiency, using spherical biological ceramsites as the filler. The effects of temperature, pH, and fluidized bed residence time on the removal process were investigated. To compare the various effects of fluidized bed operation on nitrogen removal efficiency, traditional air stripping experiments were carried out using the identical gas flowrate, liquid flowrate, temperature and pH. The results show that the removal efficiency of ammoniacal nitrogen was improved using a fluidized bed. The mechanism of free ammonia mass transfer using fluidized bed technology was proposed. Finally, the filler adhesion problem was reduced and the technology was successfully applied to the air stripping of high concentration ammoniacal nitrogen from fecal sewage.

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