Operation modeling of closed-end and closed-loop oscillating heat pipes at normal operating condition

2004 ◽  
Vol 24 (7) ◽  
pp. 995-1008 ◽  
Author(s):  
P. Sakulchangsatjatai ◽  
P. Terdtoon ◽  
T. Wongratanaphisan ◽  
P. Kamonpet ◽  
M. Murakami
Keyword(s):  
Closed Loop ◽  
Heat Pipes ◽  
Normal Operating Condition ◽  
Operating Condition ◽  
Normal Operating

scholarly journals ANALYSIS OF RADIATION SAFETY IN THE NPP SITE IN NORMAL OPERATION CONDITION

2017 ◽  
Vol 18 (2) ◽  
pp. 73 ◽  
Author(s):  
Pande Made Udiyani ◽  
Ihda Husnayani
Keyword(s):  
Radiation Safety ◽  
Population Distribution ◽  
Meteorological Data ◽  
Meteorological Condition ◽  
Normal Operation ◽  
Weather Data ◽  
Normal Operating Condition ◽  
Operation Condition ◽  
Operating Condition ◽  
Normal Operating

ANALYSIS OF RADIATION SAFETY IN THE NPP SITE IN NORMAL OPERATION CONDITION. Construction of nuclear power plant (NPP) requires an evaluation of radiation safety which proves that operation of the NPP under normal operating condition and postulated abnormal conditions is safe. Analysis of radiation safety at the NPP site under normal operating condition is required to complete the documents of site analysis and safety analysis. This study is aimed to obtain radiation dose in the environment of the NPPs at Sebagin site in province of Bangka Belitung. The doses were calculated using PC-Cream code. It is assumed that there are three 1000-MWe PWR operating in Sebagin site. Input data required for PC-Cream simulation are routine sourceterm of three 1000MWe-PWRs, meteorological data, and agricultural and animal production, and population distribution. The meteorological data consist of stability frequency of weather for 16 sectors (wind direction) taken from local weather data for 1 year. The data of agricultural and livestock production and population distribution are also taken for 1 year for 16 sectors and 20 radial directions. The results show that the maximum dose from all types of radionuclides and all pathways accepted by adult public around Sebagin site is approximately 0.053 mSv/year to the north direction in the radius of 1 km. This dose is far below the dose limit value of 1 mSv/year or dose constraint of 0.3 mSv/year as public acceptance criteria (BAPETEN). It can be concluded that radiation doses are influenced by activity and type of nuclides sourceterm, reactor layout, meteorological condition, and environmental condition.

scholarly journals Performance Evaluation of Three PID Controller Tuning Algorithm on a Process Plant

2015 ◽  
Vol 5 (5) ◽  
pp. 1075 ◽  
Author(s):  
Oladimeji Ibrahim ◽  
Sulyman A. Y. Amuda ◽  
Olatunji O. Mohammed ◽  
Ganiyu A. Kareem
Keyword(s):  
Performance Evaluation ◽  
Pid Controller ◽  
Chemical Process ◽  
Normal Operating Condition ◽  
Controller Tuning ◽  
Operating Condition ◽  
Loop Control ◽  
Normal Operating ◽  
Process Plant ◽  
Pid Controller Tuning

Accurate tuning of controller in industrial process operation is prerequisite to system smooth operation which directly reduce process variability, improved efficiency, reduced energy costs, and increased production rates. Performance evaluation of a model based PID controller tuning algorithm on a chemical process plant is presented in this paper. The control action of three different PID controller tuning algorithms namely; Hagglund-Astrom, Cohen and Coon, and Ziegler-Nichols on the process plant was examined in a closed loop control configuration under normal operating condition and in the face of disturbance. LabVIEW software was used to model a chemical process plant from open loop control test data. The time domain response analysis of the controllers shows that each tuning algorithm exhibit different time response. Ziegler-Nichols algorithm shows the best performance with fastest rise time, settling time and was able to restore the system back to normal operating condition in a short time when subjected to disturbance compare to Cohen & Coon controller and Hagglund-Astrom algorithm settings.

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