RELAP5/MOD3 Code Verification Through PWR Pressure Vessel Small Break LOCA Tests in OECD/NEA ROSA Project

2008 ◽  
Author(s):  
Hideo Nakamura ◽  
Tadashi Watanabe ◽  
Takeshi Takeda ◽  
Hideaki Asaka ◽  
Masaya Kondo ◽  
...  
Keyword(s):  
State Of The Art ◽  
Simulation Models ◽  
Predictive Capability ◽  
Experimental Conditions ◽  
Energy Agency ◽  
Test Analysis ◽  
Post Test ◽  
Complex Phenomena ◽  
Reactor Accidents ◽  
Relap5 Code

The Japan Atomic Energy Agency (JAEA) started OECD/NEA ROSA Project in 2005 to resolve issues in the thermal-hydraulic analyses relevant to LWR safety through the experiments of ROSA/LSTF in JAEA. More than 17 organizations from 14 NEA member countries have joined the Project. The ROSA Project intends to focus on the validation of simulation models and methods for complex phenomena that may occur during DBEs and beyond-DBE transients. Twelve experiments are to be conducted in the six types. By utilizing the obtained data, the predictability of codes is validated. Nine experiments have been performed so far in the ROSA Project to date. The results of two out of these experiments; PV top and bottom small-break (SB) LOCA simulations are studied here, through comparisons with the results from pre-test and post-test analyses by using the RELAP5/MOD3.2 code as a typical and well-utilized/improved best estimate (BE) code. The experimental conditions were defined based on the pre-test (blind) analysis. The comparison with the experiment results may clearly indicate a state of the art of the code to deal with relevant reactor accidents. The code predictive capability was verified further through the post-test analysis. The obtained issues in the utilization of the RELAP5 code are summarized as well as the outline of the ROSA Project.

ROSA/LSTF Test on Nitrogen Gas Behavior During Reflux Cooling in PWR and RELAP5 Post-Test Analysis

2017 ◽  
Author(s):  
Takeshi Takeda ◽  
Iwao Ohtsu
Keyword(s):  
Large Scale ◽  
Flow Behavior ◽  
Liquid Level ◽  
Test Facility ◽  
Pressurized Water Reactor ◽  
Nitrogen Gas ◽  
Energy Agency ◽  
Test Analysis ◽  
Pressurized Water ◽  
Post Test

An experiment focusing on nitrogen gas behavior during reflux cooling in a pressurized water reactor (PWR) was performed with the rig of safety assessment/large scale test facility (ROSA/LSTF) at Japan Atomic Energy Agency. The test conditions were made such as the constant core power of 0.7% of the volumetric-scaled PWR nominal power and the primary pressure of lower than 1 MPa, unlike a previous related test with the LSTF. The steam generator (SG) secondary-side collapsed liquid level was maintained at a certain liquid level above the SG tube height. Nitrogen gas was injected stepwise into each SG inlet plenum at a certain constant amount. The primary pressure and the SG U-tube fluid temperatures were greatly dependent on the amount of nitrogen gas accumulated in the SG U-tubes. Nitrogen gas accumulated from the outlet towards the inlet of the SG U-tubes. Non-uniform flow behavior was observed among the SG U-tubes with nitrogen gas ingress. The RELAP5/MOD3.3 code indicated remaining problems in the predictions of the primary pressure and the SG U-tube fluid temperatures after nitrogen gas inflow.

RELAP5 Code Study of ROSA/LSTF Experiment on a PWR Station Blackout (TMLB’) Transient

2013 ◽  
Author(s):  
Takeshi Takeda ◽  
Hideo Nakamura
Keyword(s):  
Reverse Flow ◽  
Natural Circulation ◽  
Sensitivity Analyses ◽  
Test Analysis ◽  
Coolant Injection ◽  
Post Test ◽  
Station Blackout ◽  
Core Cooling ◽  
Secondary Side ◽  
Relap5 Code

RELAP5 code post-test analysis was performed on one of abnormal transient tests conducted with the ROSA/LSTF simulating a PWR station blackout (SBO) transient with the TMLB’ scenario in 1995. The RELAP5 code predicted well the overall trend of the major phenomena observed in the LSTF test, and indicated remaining problems in the predictions of reverse flow U-tubes in steam generator (SG) during long-term single-phase liquid natural circulation. Sensitivity analyses were done further to clarify effectiveness of depressurization of and coolant injection into SG secondary-side as accident management measures to maintain core cooling, based on the LSTF post-test analysis. SG secondary-side depressurization was initiated by fully opening the safety valve in one of two SGs with the incipience of core uncovery. Coolant injection was done into the secondary-side of the same SG at low pressures considering availability of fire engines. The SG depressurization with the coolant injection was found to well contribute to maintain core cooling by the actuation of accumulator system during a PWR SBO (TMLB’) transient.

PERBEDAAN PENGARUH COGNITIVE THERAPY (CT) DAN LOGO THERAPY TERHADAP DEPRESI PADA PASIEN DENGAN HEMODIALISIS DI RS WAVA HUSADA KEPANJEN

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Nia Agustiningsih ◽  
Setyawati Soeharto ◽  
Rinik Eko Kapti
Keyword(s):  
Cognitive Therapy ◽  
Hemodialysis Patient ◽  
Sampling Procedure ◽  
Mean Value ◽  
T Test ◽  
Physical Aspect ◽  
Test Design ◽  
Test Analysis ◽  
Post Test ◽  
Quasi Experimental

Abstract : Patient with chronical diease such as Hemodialysis more likely need psycotherapy because until now medical atention only focus on physical aspect. Psycotherapy that can be used on Hemodialysis that going through depression is cognitive therapy and logo therapy. This study was to analysed the difference of influence between cognitive therapy and logo therapy on Hemodialysis patient that going through depression. This study was used quasi experimental pre–post test design. Respondent taking part in this study was 15 respondent for cognitive therapy and 15 respondent for logo therapy with puporsive sampling procedure. Study was conducted on Hemodialysis unit on RS Wava Husada Kepanjen from 21 April until 26 Mey 2017. Data analysis used on this study was dependent t test  and independent t test. Dependent t test  analysis showed  significant value is 0,000 (less than < 0,05).Analysis showed  significant value is 0,000 (less than < 0,05) that means there is difference between cognitive therapy and logo therapy to decrease depression on hemodialysis patient with mean value cognitive therapy (1,62) dan logo therapy (3,82). Conclussion on this study is that logo therapy more effective to reduce depression on Hemodialysis patient than cognitive therapy so logo therapy can applicated in hemodialysis patient.Keyword : cognitive therapy, logo therapy, depression in hemodialysis patient Abstrak : Pasien dengan penyakit kronis dengan hemodialisis diperlukan psikoterapi karena selama ini fokus penanganan di pelayanan kesehatan hanya pada masalah fisik. Psikoterapi yang bisa digunakan pada pasien hemodialisis yang mengalami depresi adalah cognitive therapy dan logo therapy. Penelitian ini bertujuan untuk menganalisis perbedaan pengaruh cognitive therapy dan logo therapy terhadap depresi pada pasien dengan hemodialisis. Penelitian ini menggunakan desain penelitian quasi experimental pre – post test design. Jumlah responden dalam penelitian ini 15 responden untuk kelompok cognitive therapy dan 15 responden untuk kelompok logo therapy yang didapatkan dengan menggunakan tehnik purposive sampling. Penelitian dilakukan di unit hemodialisis RS Wava Husada Kepanjen mulai tanggal 21 April – 26 Mei 2017. Pemberian terapi dilakukan oleh peneliti sendiri yang telah mendapatkan lisensi dari perawat spesialis jiwa. Analisis data yang digunakan dalam penelitian ini adalah dependent t test dan independent t test. Hasil analisis dependent t test  pada kelompok sebelum dan setelah diberikan cognitive therapy dan logo therapy didapatkan hasil nilai signifikansi 0,000 < 0,05 yang berarti bahwa ada perbedaan skor depresi antara sebelum dan sesudah diberikan pemberian cognitive therapy dan logo therapy  Sedangkan hasil analisis independent t test menunjukkan bahwa nilai signifikansi 0,000 < 0,05 yang berarti  ada perbedaan yang bermakna antara cognitive therapy dan logo therapy dalam menurunkan depresi pada pasien dengan hemodialisis yaitu dengan rata – rata penurunan terhadap depresi untuk cognitive therapy dan logo therapy masing – masing yaitu 1,62 dan 3,86.  Hal ini berarti bahwa logo therapy lebih efektif menurunkan depresi pada pasien hemodialisis dari pada cognitive therapy. Berdasarkan hasil penelitian tersebut diharapkan bahwa logo therapy bisa diaplikasikan sebagai alternatif psikoterapi pada pasien hemodialisis.Kata Kunci: cognitive therapy, logo therapy, depresi pada pasien hemodialisis

Effects of PETTLEP imagery technique on precision skills: a study on drag flick in Pakistan hockey

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Shamsa Hashmi ◽  
Tanveer Akhtar ◽  
Maniha Hashmi
Keyword(s):  
Control Group ◽  
Imagery Ability ◽  
Physical Practice ◽  
Test Analysis ◽  
Skill Levels ◽  
Substantial Impact ◽  
Significant Difference ◽  
Post Test ◽  
Imagery Scripts ◽  
Complex Motor Skills

AbstractPresent study was aimed at investigating the role of Physical, Environmental, Task, Timing, Learning, Emotion and Perspective (PETTLEP) Imagery technique in the improvement of skill precision level of hockey drag flickers. For this purpose, both male (83) and female (38) hockey drag flickers (n=121) of age ranged between 17 and 27 years were selected from different hockey teams belonging to clubs, colleges, universities, departments, regional and national academies of Pakistan. Participants were made to undergo a Pretest-Intervention-Posttest research design consisted of 20 drag flicks and filling of SIAQ questionnaire. Drag Flick Precision Measurement Test (DFPMT) along with Sports Imagery Ability Questionnaire (SIAQ) were used to measure their skill precision levels and their imagery ability. The participants were classified into three categories as per their skill precision levels (Point-based), ranging from 48 Novice (upto12 points), 42 Intermediate (13–18 points) and 31 Elite (19 points and above), and were randomly assigned to one of four intervention groups; Physical Practice (PP), PETTLEP Imagery Practice (IP), Physical Practice+PETTLEP Imagery Practice Combination (CP), and No Practice (NP) Control group. Each group performed their respective tasks for 10 weeks through specially designed physical training programs aided by Imagery scripts. Paired sample t test analysis showed that all groups improved significantly (p<0.05) from pre- to post-test, and the CP group improved more with average improvement value of 8.32 for DFPMT and 5.39 for SIAQ (p<0.05) than the IP, PP and NP groups. However, there was no significant difference found between the PP (Sig. 0.73) and NP (Sig. 0.44) groups in SIAQ. Result extend prior research findings and suggests that PETTLEP Imagery practice used in combination with Physical practice has substantial impact on improving performance of complex motor skills, Present findings showed that PETTLEP imagery model was found to improve player’s precision skill levels, especially when it was combined with physical practice. However, further studies in this connection are needed.

Post-Test Analysis of an Integral Effect Reflood Test for an APR1400 Large-Break LOCA Scenario

2008 ◽  
Author(s):  
Hyun Sik Park ◽  
Dong-Jin Euh ◽  
Ki-Yong Choi ◽  
Yeon-Sik Kim
Keyword(s):  
Reliable Data ◽  
Hydraulic Characteristics ◽  
Test Analysis ◽  
Safety Issues ◽  
Analysis Methodology ◽  
Integral Effect ◽  
Post Test

Post-test analysis was performed on an integral effect reflood test, the ATLAS Test No. 9, for an APR1400 Large-Break LOCA (LBLOCA) scenario by using the MARS code. Integral effect tests on the reflood period of a large break LOCA were performed by using the ATLAS facility to help understand the thermal-hydraulic phenomena during the reflood period of a large-break LOCA for APR1400 and for resolving the current safety issues for the APR1400 licensing on the downcomer boiling phenomenon. The present ATLAS Test No. 9 is one of the integral effect reflood tests for investigating the thermal-hydraulic characteristics during an entire reflood period to provide reliable data to help validate the LBLOCA analysis methodology for APR1400.

scholarly journals Using Semantic Technology To Model Persona For Adaptable Agents

2021 ◽  
Author(s):  
Johannes Nguyen ◽  
Thomas Farrenkopf ◽  
Michael Guckert ◽  
Simon T. Powers ◽  
Neil Urquhart
Keyword(s):  
Road Traffic ◽  
State Of The Art ◽  
Software Agents ◽  
Simulation Models ◽  
Agent Model ◽  
Semantic Technology ◽  
Art Research

In state of the art research a growing interest in the application of agent models for the simulation of road traffic can be observed. Software agents are particularly suitable for the representation of travellers and their goal-oriented behaviour. Although numerous applications based on these types of models are already available, the options for modelling and calibration of the agents as goal-oriented individuals are either simplified to aggregated parameters or associated with overly complex and opaque implementation details. This makes it difficult to reuse available simulation models. In this paper, we demonstrate how the combination of persona models together with semantic methods can be applied to achieve a well-structured agent model that allows for improved reusability.

scholarly journals E MUSCULOSKELETAL DISORDERS (MS PENGARUH WORKPLACE STRETCHING EXERCISE TERHADAP PENURUNAN KELUHAN MUSCULOSKELETAL DISORDERS(MSDs) PADA PEKERJA BATIK TULIS DI KECAMATAN SOKARAJA

2017 ◽  
Vol 9 (02) ◽  
pp. 49
Author(s):  
Siti Harwanti ◽  
Nur Ulfah ◽  
Budi Aji
Keyword(s):  
Musculoskeletal Disorders ◽  
Wilcoxon Test ◽  
Control Group ◽  
P Value ◽  
Control Group Design ◽  
Test Analysis ◽  
Result Show ◽  
Post Test ◽  
Equivalent Control ◽  
And Control

Batik maked process especially �mbironi�, is done in sit position. If this position maintained for a long period, that could be cause muscle strain which may lead into musculoskeletal disorders. The research was aim to know the effect of Workplace Stretching Exercise (WSE) to reduced MSDs in hand-made batik workers. The research was quasy experimental by non-equivalent control group design. Subjects were 37 female handmade batik workers used purposive sampling. Data analysis used Friedman test and Wilcoxon test, then for two independent sample used Independent t Test and Mann Whitney test with significancy level at 5% or a = 0,05. Analysis result show that there is no difference in MSDs on experiment and control group after pre-test which had p-value = 0,371 (>0,05). The result of middle-test and post-test p value = 0,000 (<0,05) that there is significant mean difference of MSDs between experiment and control group. Based on the middle-test and post-test analysis result, it could be conclude that there is an effect of WSE to reduce MSDs of handmade batik workers.

scholarly journals Peningkatan Soft Skills Pribadi Konselor Mahasiswa BKI Melalui kegaitan Career Development Program (CDP)

2018 ◽  
Vol 5 (2) ◽  
pp. 171
Author(s):  
Triyono Triyono ◽  
Syakirin Al-Ghozaly ◽  
Vera Imanti
Keyword(s):  
Career Development ◽  
Soft Skills ◽  
Design Method ◽  
Development Program ◽  
Guidance And Counseling ◽  
Test Analysis ◽  
Before And After ◽  
Post Test ◽  
Career Development Program ◽  
Personal Competencies

Soft skills are a set of abilities related to adjustments to oneself, others, and the environment. The counselor's personal soft skills mean the abilities or personal competencies possessed by a counselor. This study aims to determine how much the Career Development Program (CDP) influences in developing the counselor's personal soft skills of BKI students. The design of this research is quantitative experimental, using the pre-experimental design method with the type of pre-test and post-test one group design. The population of this study were the students of Islamic Guidance and Counseling (BKI) IAIN Surakarta 2015/2016, 2016/2017, and 2017/2018 academic years. The sample in this study were 90 students by taken in 3 classes in each academic year, through stratified cluster random sampling. Measurement of the counselor's personal soft skills using EPPS psychological instruments. The research results of the counselor’s personal soft skills of BKI students before and after being given Career Development Program (CDP) training, both in the second semester, 4th semester and 6th semester students groups showed significant differences. The results of paired t-test analysis obtained the pretest and posttest values with sig values = 0.000 <0.05. This means that the Career Development Program (CDP) has a significant effect on improving the counselor's personal soft skills of BKI students. The Career Development Program (CDP) is a model for the development and improvement of personal counselor’s soft skills that are effective for the students of BKI IAIN Surakarta

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