Operating Experience with LAMPF Main Beam Lines Instrumentation and Control System

1975 ◽  
Vol 22 (3) ◽  
pp. 1570-1573 ◽  
Author(s):  
Olin B. van Dyck ◽  
A. Harvey ◽  
H. H. Howard ◽  
D. L. Roeder
Keyword(s):  
Control System ◽  
Operating Experience ◽  
Main Beam ◽  
And Control

Development of Instrumentation and Control Systems for UK ABWR

2017 ◽  
Author(s):  
Itsuki Naito ◽  
Taisuke Koyamada ◽  
Keisuke Yamamoto ◽  
Kingo Igarashi ◽  
Hideo Harada ◽  
...  
Keyword(s):  
Control System ◽  
Control Systems ◽  
Good Practice ◽  
Operating Experience ◽  
Severe Accident ◽  
Regulatory Regime ◽  
Design Assessment ◽  
Class 1 ◽  
The Uk ◽  
And Control

This paper introduces the Instrumentation and Control (I&C) system for the proposed UK Advanced Boiling Water Reactor (UK ABWR) offered by Hitachi-GE Nuclear Energy, Ltd (Hitachi-GE). Hitachi-GE has been progressing the UK Generic Design Assessment (GDA) licensing process over the last 3 years. This is the process through which the Office for Nuclear Regulations (ONR) assesses the UK ABWR for suitability from a nuclear safety, security, environmental protection and waste management perspective and it is the first step towards proceeding with the construction phase in the UK. ONR’s regulatory expectations setting out relevant good practice are described in the Safety Assessment principles (SAPs), which are considered into the I&C design for UK ABWR. In addition, it has also been designed to take into account relevant good practices and regulations. In accordance with expectations derived from SAPs, the UK ABWR I&C systems are categorized and classified as required by IEC 61513 and IEC 61226. In addition, the overall I&C architecture, including all associated Human-Machine Interfaces (HMIs), abides by the principles independence and diversity of safety measures, segregation and separation of the protection and control systems. As a result, the UK ABWR I&C architecture is composed of major eight sub-systems. The eight sub-systems are: -Safety System Logic and Control system (SSLC) -Hardwired Backup System (HWBS) -Safety Auxiliary Control System (SACS) -Plant Control System (PCntlS) -Reactor/Turbine Auxiliary Control System (RTACS) -Plant Computer System (PCS) -Severe Accident Control and Instrumentation system (SA C&I) -Other dedicated C&I systems. The features for each sub-system such as redundancy of safety train or segregation among divisions are specified so that each sub-system will achieve its reliability as well as increase availability. While in the Japanese ABWR safety I&C system, the main protection system (SSLC), is microprocessor-based from the decades of successful operating experience in the past BWR, to meet the UK regulatory regime expectation on diversity between Class 1 platform and non-Class 1 platform, the SSLC (Class 1) for the UK ABWR is by Field Programmable Gate Array (FPGA). This system is currently under development and complies with IEC 62556. Its safety integrity level is planned to be SIL 3 (as a single division) and SIL 4 (as a four division system) as defined in IEC 61508. The HMIs which constitute an integral part of the I&C systems are also designed to comply with the I&C architecture regarding their categorization and classification with consideration of Human Factors (HF) modern methods taken into accounts.

Development of a Jacobian Module for Advanced Pulp and Paper Simulation and Control

TAPPI Journal ◽  
2009 ◽  
Vol 8 (1) ◽  
pp. 4-11
Author(s):  
MOHAMED CHBEL ◽  
LUC LAPERRIÈRE
Keyword(s):  
Control System ◽  
Nonlinear Behavior ◽  
Simulation Software ◽  
Pulp And Paper ◽  
Pid Controllers ◽  
Tuning Parameters ◽  
Pid Tuning ◽  
Fixed Set ◽  
And Control ◽  
Operating Points

Pulp and paper processes frequently present nonlinear behavior, which means that process dynam-ics change with the operating points. These nonlinearities can challenge process control. PID controllers are the most popular controllers because they are simple and robust. However, a fixed set of PID tuning parameters is gen-erally not sufficient to optimize control of the process. Problems related to nonlinearities such as sluggish or oscilla-tory response can arise in different operating regions. Gain scheduling is a potential solution. In processes with mul-tiple control objectives, the control strategy must further evaluate loop interactions to decide on the pairing of manipulated and controlled variables that minimize the effect of such interactions and hence, optimize controller’s performance and stability. Using the CADSIM Plus™ commercial simulation software, we developed a Jacobian sim-ulation module that enables automatic bumps on the manipulated variables to calculate process gains at different operating points. These gains can be used in controller tuning. The module also enables the control system designer to evaluate loop interactions in a multivariable control system by calculating the Relative Gain Array (RGA) matrix, of which the Jacobian is an essential part.

Еlectric Drive and Control System of Flying saw of electricweld item

2015 ◽  
Vol 19 (95) ◽  
pp. 50-53
Author(s):  
Aleksej A. Kravcov ◽  
◽  
Leonid G. Limonov ◽  
Valerij V. Sinelnikov ◽  
Stanislav V. Potapov
Keyword(s):  
Control System ◽  
Drive And Control ◽  
And Control

Analysis of the Management and Control System of Trade Receivables on the Effectiveness of the Corporate Cash Flow on PT. Enseval Putera Megatrading, tbk

2020 ◽  
Vol 2 (1) ◽  
pp. 75-87
Author(s):  
Syarifah Nuriah ◽  
Abdul Rakhman Laba ◽  
Muhammad Sobarsyah
Keyword(s):  
Control System ◽  
Cash Flow ◽  
Primary Data ◽  
Ratio Analysis ◽  
Financial Ratio ◽  
Accounts Receivable ◽  
Corporate Capital ◽  
Financial Ratio Analysis ◽  
Data Source ◽  
And Control

This study aims to determine the management and control system of trade receivables on the effectiveness of the cash flow company’s at PT. Enseval Putera Megatrading, Tbk. The data source used in this study is the primary data source, obtained directly from the company. The analytical method used for testing the management and control system of receivables on the effectiveness of cash flow is the analysis of financial ratios. In this study, the data used for analysis are qualitative data analysis and financial ratio analysis, namely the activity ratio (RTO, ACP, Arrears Ratio, and Billing Ratio). The results showed that (1) RTO of PT. Enseval Putera Megatrading, the highest rate in 2017 was 189 times, while the lowest RTO was in 2015 which was 115 times. This shows the normal level of turnover. The faster the payment terms, the better for the company, because the faster the working capital embedded in receivables returns to capital or cash, which means the higher the receivables turnover. (2) ACP or the average age of collection of receivables applied by companies, especially the value in 2017 is 2 days. This means that the company has been effective in managing its accounts receivable because the standard for collecting receivables set by the company is the repayment limit or due date no later than 7 (seven) to 90 (Ninety) calendar days from the billing statement received by the service user. (3) The Arrears Ratio, namely from 2014-2018, the largest was only 1.11%. This shows that the lower the arrears ratio, the better for the company, which means the company is able to handle its receivables properly. (4) Billing Ratio shows that from 2014-2018 the lowest that is 98.88% shows the greater the value of collectible receivables means the greater the percentage value of the collection ratio so that the better for the company because of the greater return on corporate capital. Then it can be concluded that the Billing Ratio of PT. Enseval Putera Megatrading, it's not working effectively.

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