• Title/Summary/Keyword: LPG accident

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Effects of the Maghemite for Explosive accident Prevention to Liquefied Petroleum Gas (LPG 폭발사고 예방을 위한 Maghemite의 영향)

  • 박영구
    • Journal of the Korean Society of Safety
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    • v.11 no.2
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    • pp.67-78
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    • 1996
  • Gas sensing element, $\gamma-Fe_2O_3$was synthesized by dehydration, reduction, and oxidation of $$${\gamma}$-FeOOH, which was synthesized with $FeSO_4\;{\cdot}\;7H_2O$ and NaOH. They were produced as a bulk-type, a thick film-type. Then, their responses and mechanisms of response to the gas of liquefied-petroleum were studied. The qualities of gas sensing elements are decided by the structure and the relative surface area. In the process of $\alpha-FeOOH $synthesis, the effects of reaction conditions as the equivalent ratio, on the structure and the relative surface area of gas sensing element were observed. The changes of the structure were measured with XRD, SEM, TG-DTA and BET. The resistance changes of the synthesized gas sensor in the air were measured. The response ratio were also measured for the changes of working temperature and gas concentration. As a result of analysis with XRD, it was confirmed that the the best conditions for the synthesis of $\alpha -FeOOH$ were equivalent ratio 0.65. The thick film-type element of $\gamma-Fe_2O_3$responded more quickly than the bulk-type did. The structure and the relative surface area of the $\alpha-FeOOH $were confirmed as the important factors deciding gas response charcteristics.

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Hazard Evaluation of Gas Processes Using a Multi-distinction Equipment Screening Algorithm (다중판별 장치 스크리닝 기법을 이용한 가스공정의 위험성 평가)

  • Yoon En Sup;Park Jeong Su;Ahn Sung Joon;Han Kyounghoon;Yoon Jong Phil;Kim Ku Hwoi;Shin Dongil
    • Journal of the Korean Institute of Gas
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    • v.7 no.1 s.18
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    • pp.1-9
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    • 2003
  • A Multi-distinction Equipment Screening Algorithm (MESA) is proposed. It selectively integrates Dow's F&EI as its process hazard index technique and ESA (Equipment Screening Algorithm) as qualitative hazard classification technique, and retrieves a detailed list of hazardous equipments with the total hazard indices of those equipments. The inherent expert system, which includes the accident scenarios of the equipments and processes and experts' views of them, narrows further down the list of hazardous equipments and recommends only the most notable candidates. Through the case study of distinguishing the hazardous ranking of the equipments of the LPG underground storage process, using the expert system or not, the applicability of MESA has been validated. Taking the characteristics of the process equipments with hazardous ranking in the point of process intrinsic safety, this proposed algorithm would contribute to providing engineers or managers with information on constructing safely devices and mitigation devices and on scheduling emergency response planning.

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Current Status and the Future Prospect of Rehabilitation Nursing in Korea (한국 재활간호 현황과 전망)

  • Kang, Hyun-Sook;Suh, Yeon-Ok;Lee, Hae-Sook
    • The Korean Journal of Rehabilitation Nursing
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    • v.4 no.2
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    • pp.240-247
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    • 2001
  • The history of rehabilitation of disabilities in Korea began with the foreigners and missionaries who were interested in it after Korean War. In 1981, Disabled Persons Welfare Act was enacted and the 88 Paralympics brought the nations attention to the welfare and rehabilitation of persons with disabilities. Since then, the facilities and the services for the disabled persons have expanded rapidly and the rehabilitation treatment and nursing intervention are drawing more attention. Against this background, the survey on the current status of disabilities, welfare service, facilities, and rehabilitation nursing was conducted. The results of this survey are as follows. 1. According to the 2000 census of disabilities, the number of persons with disabilities in Korea is estimated at 1,449,500, or 3.09% of the entire Korean population, 0.74% up from 2.35% in 1995. 2. Disability Types in 2000 The 2000 census showed that the persons with disabilities numbered 1,449,496 out of the total population and 1,024,371 persons are registered for disability, making up 70.7% of the estimated disabled population. Among them, physically disabled persons accounted for the largest 41.7% (605,127) and mentally retarded persons stood at the smallest 9% (13,481). 3. Percentage of Disability Presence The survey showed that more than 90% of disability were acquired. However, 44.8% of mental disability and 61.4% of hearing/speaking disability were not acquired after birth. This means that these disabilities happened by congenital cause or birth accident. 4. Yearly Figure of Registered Disabled Persons In 1989, 218,601 persons registered for disability and, in 2000, the number increased by 4.7 times to 1,024,371. These figures are different from the actual number of disabled persons. According to the 1995 census, 1,053,486 were disabled persons but only 378,323registered for disability. And, in the 2000 census, 1,024,371 out of the 1,449,496 of disabled persons registered for disability. 5. Welfare Service for Persons with Disability 62.6% of the total disabled people are registered and physically disabled persons accounted for the highest percentage of 96.7%. 26.5% of non-registered disabled people said that they didnt know the registration procedure. The rest of them replied that they didnt think they were disabled or that registration didnt seem to give any benefits. 6. Welfare Policies for Disabled Persons The welfare benefits given to the disabled are as follows: Issuance of disabled sign for car drivers, Permission to use LPG fuel, Communication fee reduction, Tax exemption related to cars, Reduction of public facility fees, Household allowance, Tax reduction or exemption, Medical allowance and education subsidy for children, and Housing. 7. Current Condition of Welfare Facilities by Disability Type The welfare institutions for disabilities numbered 188 in total and they can accommodate 16,823 persons. Categories of these institutions are physical disability(37), visual disability(10), hearing/speaking disability(14), mental retardation(59), and sanatoriums(68). 8. Human Resource of Rehabilitation of Disabilities Advanced education programs include rehabilitation nursing in its curriculum and this was selected as the program of Korean Academic Society of Nursing in 1990. In November 1997, Korean Academic Society of Rehabilitation Nursing was launched and many academic meeting and seminars were held. This organization is also making efforts to develop the education program for qualified rehabilitation nursing professionals and to develop the standards of rehabilitation nursing practice. In the professionals of the rehabilitation, there are rehabilitation specialist, physical therapist, speech therapist, occupational therapist. It is needed to come up with the measures to supply stable human resources following the demand of disabled persons and to recognize the private certificates for rehabilitation professionals as official ones after reviewing the education and training programs of private institutions. 9. Rehabilitation Nursing 1) Rehabilitation nursing was taught as an independent subject in 11 undergraduate programs and 9 graduate programs. 2) Research on rehabilitation nursing in Korea were 24 experimental research and 11 non-experimental research. The intervention of experimental research were mostly education and exercise rehabilitation programs. 3) In the three rehabilitation hospitals, nursing is divided into two categories, direct nursing and education & counseling. Direct nursing includes tracheostomy or nasogastric tube care, urination and defication, skin care, pain control, complication prevention and care, prevention of injury from a fall, etc.

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