• Title, Summary, Keyword: Safety Test

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The necessity of Introducing the In-service Test based on Analysis of Performance Test Result of Pressure Safety Valve (안전밸브 성능점검 자료 분석을 통한 운전 중 점검방법 도입의 필요성 고찰)

  • Jang, Yu Ri;Kim, Jeong Hwan;Kim, Seong Hee;Kwak, Young Hwan
    • Journal of the Korean Institute of Gas
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    • v.21 no.6
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    • pp.15-22
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    • 2017
  • The pressure safety valve is very important device for securing the safety in the facilities which is operated by high pressure gases. The performance test should be periodically inspected by relate law because the failure of pressure safety valves might be main causes of serious accidents in the industrial fields. Shop test is mainly use for inspecting the performance test of pressure safety valves but the test method is not to be a solution for securing the safety. So, the development of alternative method is required. In this paper, there is a limit to securing the safety if the performance test is with just shop test. The limitation is checked from analysis result based on performance test results of pressure safety valves. The necessity for introducing the in-service test is reviewed to surmount the limitation. As a result, in-service test method should be developed and introduced to improve the inspection efficiency and economical loss. Also, it can be reduce the risk level.

A Study on the Safety Management and Risk Assessment of the Certification Flight Test (인증비행시험 안전관리 및 위험도 평가기법 연구)

  • Choi, Joo-Won
    • Journal of Aerospace System Engineering
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    • v.5 no.1
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    • pp.30-35
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    • 2011
  • Certification flight test is very risky and there are many hazards. Because the flight test is performed with the aircraft, that is safety and flight characteristics are not proven. And the test items and conditions are critical. If there is loss of aircraft during certification flight test, the certification program, development period can be delayed. Therefore, maintaining safety of the aircraft during flight test is very important. There are not much flight test experiences in Korea. However, developed nations has long history of flight test and experiences of flight test accidents. Based on these experiences, they has developed systematic management methods for the flight test safety. In this study, I would like to introduce safety management and risk assessment of the certification flight test.

A Study on the Comparison for the Child Occupant Safety from Frontal Crash Test Protocol (정면충돌 시험방법에 따른 어린이 탑승객 충돌안전성 비교연구)

  • Kim, Siwoo
    • Journal of Auto-vehicle Safety Association
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    • v.8 no.3
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    • pp.33-38
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    • 2016
  • Recently, development in vehicle safety could increase interest in children's safety in vehicle collisions. But the research of children safety in vehicle collisions is not being conducted as many as that of adult's. Especially the study for the vehicle crash was not much. This study focused on the comparison of child safety between test protocols to evaluate children's safety in crash test. Injuries of Q6 and Q10 dummy were evaluated using FFRB (Full frontal rigid barrier) test and 40% ODB (Offset deformable barrier) test with one model vehicle. Even though the limit number of test, the tendency of injury criteria of Q6 and Q10 dummy between the test protocols was not conformed but injury criteria of Q6 and Q10 were not same between FFRB and 40% ODB.

Evaluation of the Safety impact by Adaptive Cruise Control System (자동순항제어기에 의한 안전도 향상 효과 분석)

  • Lee, Taeyoung;Yi, Kyongsu;Lee, Chankyu;Lee, Jaewan
    • Journal of Auto-vehicle Safety Association
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    • v.4 no.1
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    • pp.5-11
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    • 2012
  • This paper discusses the evaluation of the safety impact of the Adaptive Cruise Control (ACC) system in Korea. To evaluate the safety impact, this paper suggests an analysis method by using the test scenario and field operational test data. The test scenario is composed to represent the main component factor of the ACC system and ACC related accident situation such as rear-end collision, lane-change, and road-curvature, etc. Also, from the field operation test data, the system's potential to increase the safety can be measured ideally. Besides, field operational testdata was used to revise the expected safety impact value as Korean road conditions. By using the proposed evaluation method, enhanced safety impact of the ACC system can be estimated scientifically.

On an Enhanced Model of System Readiness Level by Incorporating Safety for the Development of Live Fire Test Systems (실사격 시험시스템의 효율적인 개발을 위해 안전도 반영을 통해 개선된 시스템 성숙도 모델에 관한 연구)

  • Ye, Sung Hyuck;Lee, Jae-Chon
    • Journal of the Korea Safety Management & Science
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    • v.17 no.3
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    • pp.195-204
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    • 2015
  • The live fire test has been playing a critical role in evaluating the goals-to-meet of the weapon systems which utilize the power of explosives. As such, the successful development of the test systems therein is quite important. The test systems development covers that of ranges and facilities including system-level key components such as mission control, instrumentation or observation, safety control, electric power, launch pad, and so on. In addition, proper operational guidelines are needed with well-trained test and operation personnel. The emerging weapon systems to be deployed in future battle field would thus have to be more precise and dynamic, smarter, thereby requiring more elaboration. Furthermore, the safety consideration is becoming more serious due to the ever-increasing power of explosives. In such a situation, development of live fire test systems seems to be challenging. The objective of the paper is on how to incorporate the safety and other requirements in the development. To achieve the goal, an architectural approach is adopted by utilizing both the system components relationship and safety requirement when advanced instrumentation technology needs to be developed and deteriorated components of the range are replaced. As an evaluation method, it is studied how the level of maturity of the test systems development can be assessed particularly with the safety requirement considered. Based on the concepts of both systems engineering and SoS (System-of-Systems) engineering process, an enhanced model for the system readiness level is proposed by incorporating safety. The maturity model proposed would be helpful in assessing the maturity of safety-critical systems development whereas the costing model would provide a guide on how the reasonable test resource allocation plan can be made, which is based on the live fire test scenario of future complex weapon systems such as SoS.

Model-Based Architecture Design of the Range Safety Process for Live Fire Test with Enhanced Safety (실사격 시험 프로세스의 안전성 강화를 위한 MBSE 기반 아키텍처 연구)

  • Ye, Sung Hyuck;Lee, Jae-Chon
    • Journal of the Korea Safety Management & Science
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    • v.16 no.2
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    • pp.43-52
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    • 2014
  • In weapon systems development, live fire tests have been frequently adopted to evaluate the performance of the systems under development. Therefore, it is necessary to ensure safety in the test ranges where the live fire tests can cause serious hazards. During the tests, a special care must be taken to protect the test and evaluation (T&E) personnel and also test assets from potential danger and hazards. Thus, the development and management of the range safety process is quite important in the tests of guided missiles and artillery considering the explosive power of the destruction. Note also that with a newly evolving era of weapon systems such as laser, EMP and non-lethal weapons, the test procedure for such systems is very complex. Therefore, keeping the safety level in the test ranges is getting more difficult due to the increased unpredictability for unknown hazards. The objective of this paper is to study on how to enhance the safety in the test ranges. To do so, an approach is proposed based on model-based systems engineering (MBSE). Specifically, a functional architecture is derived utilizing the MBSE method for the design of the range safety process under the condition that the derived architecture must satisfy both the complex test situation and the safety requirements. The architecture developed in the paper has also been investigated by simulation using a computer-aided systems engineering tool. The systematic application of this study in weapon live tests is expected to reduce unexpected hazards and test design time. Our approach is intended to be a trial to get closer to the recent theme in T&E community, "Testing at the speed of stakeholder's need and rapid requirement for rapid acquisition."

Development and Effect Analysis of Web-Based Instruction Program to Prevent for 6th grades of Elementary School Students from Safety Accidents (초등학교 6학년의 안전사고예방을 위한 웹기반수업 프로그램 개발 및 효과분석)

  • Song, Mi-Gyoung;Kim, Sin-Jeong
    • Child Health Nursing Research
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    • v.12 no.2
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    • pp.233-243
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    • 2006
  • Purpose: This study was aimed to develop a WBI(Web Based Instruction) program on safety for 6th grades of elementary school students and to test the effects of it. Method: The web site is http://www.safeschool.co.kr. The effect of it was tested from Mar 24, to Apr 30, 2003. The subjects were 150 students. Data were analyzed with descriptive statistics, and $x^2$ test, t-test, and repeated measure ANOVA. Result: In the knowledge of the safety precaution, the preliminary test was mean 17.8, immediate post-test was mean 20.9 and 4 weeks post-test was mean 20.9, there were significant differences statistically among three points of time. In the attitude of the safety precaution, the preliminary test was mean 75.1, the immediate post-test was mean 80.8 and 4 weeks post-test was mean 80.4, which showed significant difference statistically among three points of time. For the motive of learning to the safety precaution, it was significantly higher statistically in the WBI. As a result, the WBI group had totally longer effects on knowledge, attitude and motivation of the safety accident prevention than the textbook-based instruction. Conclusion: WBI program be used in each class to provide more effective safety instruction.

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Effects of School Safety Education on the Safety Behavior among Elementary School Students in Korea (학교 안전교육이 초등학생의 안전생활 실천에 미치는 효과)

  • Jung, Myung-Ae;Park, Kyung-Min;Kwon, Young-Sook
    • Journal of Korean Academy of Community Health Nursing
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    • v.11 no.2
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    • pp.566-576
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    • 2000
  • This study was carried out to examine the effects of school safety education on the safety behavior among elementary school students. Sixty-two 4th grade students were sampled from an elementary school in Pohang city and divided into one experimental group and one control group. The safety education has been provided to the experimental group for 4 weeks The data were collected before, just after, and 8 weeks after the education. In the pre-test, the general characteristics and safety behavior between two groups were measured. The experimental group was given school safety education twice a week for 4weeks. They also filled out the self behavior check list. In the post-test and follow up-test safety behavior was collected. The data analysis was done using $X^2$-test. t-test. Repeated measures ANOVA, analysis of simple main effect and time contrast methods, they were processed with an SPSS Win 9.0/pc. The results of this study are summarized as follows: 1) There were no differences between experimental group and control group on the general characteristics and safety behavior in the pre-test. 2) The hypothesis: 'The experimental group which was given school safety education will show higher scores on safety behavior than the control group which was not given this was supported(F=6.43 p=0.01). 3) The subhypothesis 1 : 'The scores on the indoor safety behavior of the experimental group which was given school safety education will show higher than those of the control group which were given this was supported(F=3.59 p=0.03). 4) The subhypothesis 2 : 'The scores on the outdoor safety behavior of the experimental group which was given, school safety education will show higher than those of the control group which was not given this was supported(F=5.70 p =0.00). In consequence, the experimental group which was given school safety education scored higher on safety behavior than the control group. Therefore, school safety education should continue to encourage safety behavior among elementary school students.

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Study on Ejection Mitigation Impact Test about correlation between Vehicle and B.I.W(Body In White) Condition (FMVSS 226 Ejection Mitigation Impact Test의 시험품 단순화에 따른 인자들의 상관 관계에 대한 연구)

  • Kang, Mooncheol;Shin, Hyunhack;Oh, Hyungjoon
    • Journal of Auto-vehicle Safety Association
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    • v.7 no.4
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    • pp.16-19
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    • 2015
  • FMVSS226 Ejection Mitigation Impact Test is usually performed by real vehicle. But it is necessary to perform the test using by Reinforced B.I.W. with considering vehicle developing timing and roof rail airbag (RRAB) supplier capacity. We sometimes need tendency (quick data) instead of slow accurate data to fix RRAB design as proper timing. Test with Reinforced B.I.W. is helpful saving time and cost. But it should be confirmed how much different between vehicle conditioned test result and Reinforced B.I.W. conditioned test result. There are some points to be improved even in the test with vehicle. Understanding of deviation of Reinforced B.I.W. conditioned test result from vehicle conditioned test result is needed to get benefits with using Reinforced B.I.W. conditioned in the test.

The Radiation Safety Management in the Animal Hospital Using Inspection Standard of Diagnosis Radiation System (진단용 방사선발생장치의 검사기준을 적용한 동물병원의 방사선 안전관리)

  • Kim, Sang-Woo;Rhim, Jea-Dong;Han, Dong-Kyoon;Seoung, Youl-Hun
    • Journal of the Korea Safety Management & Science
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    • v.12 no.4
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    • pp.73-80
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    • 2010
  • The purpose of this study was to investigate the actual conditions of radiation safety supervision in animal clinics using inspection standard of X-ray generator for diagnosis. The surveys for inspection standard system, equipment condition, and safety supervision were carried out in 18 animal clinics randomly. The inspection standard included reproducibility of dose exposure, kVp, mAs, collimator accuracy test, collimator luminance test, X-ray view box luminance test, grounding system equipment test and external leakage current test. The surveys of equipment condition and safety supervision used one-on-one interview with 5 points measurement. As a result, 44.44% of reproducibility of dose exposure was proper, 81.25% of kVp test was good, and 100% of mAs test was appropriate. Also, 66.66% of collimator accuracy test was proper, 61.11% of collimator luminance test was good, 53.13% of X-ray view box luminance test was suitable. In addition, only 5.55% of grounding system equipment and ground resistance was proper, 63.64% of external leakage current test was appropriate in grounding system equipment test. The 100mA electric capacity of X-ray generator for diagnosis was popular with 44.44%, and its 55.56% was purchased used equipment. Monthly average of less than 50 times (61.11%) was top frequency in use, and no animal clinic had a thermo-luminescence dosimeter(TLD). The 16 animal clinics with radiation safety zone and 2 without radiation safety zone were appeared.