The Application of the Electron Microprobe in the Analysis of Nuclear Fuel Meltdown Experiments*

1966 ◽  
Vol 10 ◽  
pp. 422-430
Author(s):  
S. J. Stachura ◽  
L. Cooper
Keyword(s):  
Electron Microprobe ◽  
Test Analysis ◽  
Fuel Rods ◽  
Failure Characteristics ◽  
Uranium Carbide ◽  
Fuel Rod ◽  
Post Test ◽  
Nuclear Heating ◽  
Carbide Fuel ◽  
Unique Capability

AbstractTransient (nuclear) heating experiments were conducted with uranium carbide fuel rods to study the failure characteristics of typical rod designs. Extremely unusual changes in microstructure were observed and the electron microprobe was employed to establish the disposition of materials resulting from the meltdown experiments. The probe results indicated substantial fuel-clad interactions and permitted the resolution of several uncertainties regarding the course of fuel rod failure and material redistribution. The electron microprobe represents a unique capability in the post-test analysis of such meltdown tests.

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.

Rod Bow Ultrasonic Measurements Possibilities

2019 ◽  
Vol 5 (3) ◽  
Author(s):  
Marcin Kopeć ◽  
Martina Malá
Keyword(s):  
Nuclear Fuel ◽  
Nuclear Reactors ◽  
Research Centre ◽  
Fuel Rods ◽  
Fuel Rod ◽  
Nuclear Fuel Assembly ◽  
Fuel Assemblies ◽  
Ultrasonic Measurements ◽  
History Of ◽  
Fuel Particles

The ultrasonic (UT) measurements have a long history of utilization in the industry, also in the nuclear field. As the UT transducers are developing with the technology in their accuracy and radiation resistance, they could serve as a reliable tool for measurements of small but sensitive changes for the nuclear fuel assembly (FA) internals as the fuel rods are. The fuel rod bow is a phenomenon that may bring advanced problems as neglected or overseen. The quantification of this issue state and its probable progress may help to prevent the safety-related problems of nuclear reactors to occur—the excessive rod bow could, in the worst scenario, result in cladding disruption and then the release of actinides or even fuel particles to the coolant medium. Research Centre Rez has developed a tool, which could serve as a complementary system for standard postirradiation inspection programs for nuclear fuel assemblies. The system works in a contactless mode and reveals a 0.1 mm precision of measurements in both parallel (toward the probe) and perpendicular (sideways against the probe) directions.

Chemical state of fission products in irradiated uranium carbide fuel

1987 ◽  
Vol 151 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Yasuo Arai ◽  
Takashi Iwai ◽  
Toshihiko Ohmichi
Keyword(s):  
Fission Products ◽  
Chemical State ◽  
Uranium Carbide ◽  
Carbide Fuel

Identification of Non-Linear Vibration Parameters of a Nuclear Fuel Rod

2018 ◽  
Author(s):  
Marco Amabili ◽  
Prabakaran Balasubramanian ◽  
Giovanni Ferrari ◽  
Stanislas Le Guisquet ◽  
Kostas Karazis ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Harmonic Balance Method ◽  
Resonance Phenomenon ◽  
Pressurized Water ◽  
Fuel Rods ◽  
Fuel Rod ◽  
Fuel Pellets ◽  
Safety Margins ◽  
Fuel Assemblies ◽  
Non Linear

In Pressurized Water Reactors (PWR), fuel assemblies are composed of fuel rods, long slender tubes filled with uranium pellets, bundled together using spacer grids. These structures are subjected to fluid-structure interactions, due to the flowing coolant surrounding the fuel assemblies inside the core, coupled with large-amplitude vibrations in case of external seismic excitation. Therefore, understanding the non-linear response of the structure and, particularly, its dissipation, is of paramount importance for the choice of safety margins. To model the nonlinear dynamic response of fuel rods, the identification of nonlinear stiffness and damping parameters is required. The case of a single fuel rod with clamped-clamped boundary conditions was investigated by applying harmonic excitation at various force levels. Different configurations were implemented testing the fuel rod in air and in still water; the effect of metal pellets simulating nuclear fuel pellets inside the rods was also recorded. Non-linear parameters were extracted from some of the experimental response curves by means of a numerical tool based on the harmonic balance method. The axisymmetric geometry of fuel rods resulted in the presence of a one-to-one internal resonance phenomenon, which has to be taken into account modifying accordingly the numerical identification tool. The internal motion of fuel pellets is a cause of friction and impacts, complicating further the linear and non-linear dynamic behavior of the system. An increase of the equivalent viscous-based modal damping with excitation amplitude is often shown during geometrically non-linear vibrations, thus confirming previous experimental findings in the literature.

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 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.

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