• Safety and Health at Work
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• 제11권1호
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• pp.61-70
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• 2020

Background: This study aims to assess whether the TSI PortaCount (Model 8020) is a measuring instrument comparable with the flame photometer. This would provide an indication for the suitability of the PortaCount for determining the workplace protection factor for particulate filtering facepiece respirators. Methods: The PortaCount (with and without the N95-Companion^TM) was compared with a stationary flame photometer from Moores (Wallisdown) Ltd (Type 1100), which is a measuring instrument used in the procedure for determining the total inward leakage of the particulate filtering facepiece respirator in the European Standard. Penetration levels of sodium chloride aerosol through sample respirators of two brands (A and B) were determined by the two measuring systems under laboratory conditions. For each brand, thirty-six measurements were conducted. The samples were split into groups according to their protection level, conditioning before testing, and aerosol concentration. The relationship between the gauged data from two measuring systems was determined. In addition, the particle size distribution inside the respirator and outside the respirator was documented. Linear regression analysis was used to calculate the association between the PortaCount (with and without the N95-Companion^TM) and the flame photometer. Results: A linear relationship was found between the raw data scaled with the PortaCount (without N95-Companion^TM) and the data detected by the flame photometer (R² = 0.9704) under all test conditions. The distribution of particle size was found to be the same inside and outside the respirator in almost all cases. Conclusion: Based on the obtained data, the PortaCount may be applicable for the determination of workplace protection factor.

• Safety and Health at Work
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• 제12권2호
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• pp.184-191
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• 2021

Background: Hearing protection devices (HPDs) are often used in the workplace to prevent hearing damage caused by noise. However, a factor that can lead to hearing loss in the workplace is improper HPD fitting, and the previous literature has shown that instructing workers on how to properly insert their HPDs can make a significant difference in the degree of attenuation. Methods: Two studies were completed on a total of 33 Hydro One workers. A FitCheck Solo field attenuation estimation system was used to measure the personal attenuation rating (PAR) before and after providing one-on-one fitting instructions. In addition, external ear canal diameters were measured, and a questionnaire with items related to frequency of use, confidence, and discomfort was administered. Results: Training led to an improvement in HPD attenuation, particularly for participants with poorer PARs before training. The questionnaire results indicated that much HPD discomfort is caused by heat, humidity, and communication difficulties. External ear canal asymmetry did not appear to significantly influence the measured PAR. Conclusion: In accordance with the previous literature, our studies suggest that one-on-one instruction is an effective training method for HPD use. Addressing discomfort issues from heat, humidity, and communication issues could help to improve the use of HPDs in the workplace. Further research into the effects of canal asymmetry on the PAR is needed.

• 한국산업보건학회지
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• 제24권3호
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• pp.393-403
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• 2014

Objectives: Korean Occupational Safety and Health Agency(KOSHA) intended to provide guidance to respirator program administrators on respirator selection. The purpose of this project is to suggest a preliminary respirator selection guide(PRSG) for the final guidance certified by KOSHA for the correct selection of respirators in the workplace. Materials: This PRSG was made on the based of current status of respirator usage including respirators available in Korea, foreign documents search and so on. PRSG was partially modified NIOSH pocket guide to chemical hazards, 3M Respirator Protection Resource Guide(RPRG) and OSHA Assigned Protection Factor(APF) rulemaking. Results: Respirators for chemicals having Korean Occupational Exposure Limits(KOELs) can be recommended in PRSG. For the others chemicals that have no KOELs, PRSG tells you what respirators you can select, using a simple step-by-step approach after health hazard assessment like HSE procedure. Conclusions: PRSG helps you to decide the right level of protection for a given hazardous substance and how to select the right respirators. PRSG is thus expected to reduce significant misuses of respirators for the work environment.

• 한국방사선학회논문지
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• 제12권4호
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• pp.459-466
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• 2018

방사선작업종사자 및 방사선작업장의 위험성은 주로 피폭선량 값으로 평가되고 있다. 하지만, 방사선작업장은 사용하는 방사선 및 작업환경이 상이하다. 특히, 방사선투과검사작업장은 작업대상물, 차폐체 사용가능 유무 등에 따라 작업환경이 다양하다. 따라서 효율적인 방사선 방호를 위해서는 여러 가지 인자들을 검토하는 것이 필요하다. 이에 전문가 및 조장 방사선작업종사자들 대상으로 설문조사를 수행하였으며, 그 결과, 방사선원, 방사선피폭선량, 작업장관리현황, 판독특이자, 정기검사현황이 주요인자로 선정되었다. 또한, 설문조사 중요도를 바탕으로 1차 가중치(안)을 설정한 후 2차적으로 전문가 자문을 통해 인자 내 세부항목별 가중치를 선정하였다. 따라서 본 연구를 통해 선정된 주요인자를 바탕으로 하여 방사선투과검사작업장 위해도 지수 모델 개발이 가능할 것으로 판단된다.

• 한국안전학회지
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• 제33권6호
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• pp.28-36
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• 2018

There was a difference in recognition of respirators according to the educational performance environment. they were showed higher recognition of respirators of group by internal and external mix trainer, less than 6 months, over 1hour, more than 5 times, variety of education. To identify the relationship between types of job classification(typical and atypical)and the levels of recognition of respirators, a total of 153 workers in a business workplace. mainly, typical workers showed higher recognition of respirators than atypical workers. Training of correct wearing showed high demands both typical and atypical workers. Descriptive statistics(SAS ver 9.2)was performed. the results of recognition of respirators were analyzed the mean and standard deviation by t-test, and anova, fit factor is used geometric means(geometric standard deviation), paired t-test, Wilcoxon analysis(P=0.05). Particulate filtering facepiece respirators (PFFR) is one of the most widely used items of personal protective equipments, and a tight fit of the respirators on the wearers is critical for the protection effectiveness. In order to effectively protect the workers through the respirators, it is important to find and evaluate the ways that can be readily applicable at the workplace to improve the fit of the respirators. This study was designed to evaluate effects of mask style (cup or foldable type) and donning training on fit factors (FF) of the respirators, since these are available at various workplace, especially at small business workplace. A total of 40 study subjects, comprised of employment type workers in metalworking industries, were enrolled in this study. The FF were quantitatively measured before and after training related to the proper donning and use of cup or foldable-type respirators. The pass/fail criterion of FF was set at 100. After the donning training for the cup-type mask, fit test were increased by 769%. but foldable-type mask was also increased after the donning training, the GM of FF for the foldable-type mask and it's increase rate were smaller as compared to the cup-type mask. Furthermore, the differences of the increase rates of the GM of FF in employment type of the subjects were not significantly for the foldable-type mask. These results imply that the raining on the donning and use of PFFR can enhance the protection effectiveness of cup or foldable-type mask, and that the training effects for the foldable-type mask is less significant than that for the cup-type mask. Therefore, it is recommended that the donning training and fit tests should be conducted before the use of the PFFR, and listening to workers opinion regularly.

• Journal of Radiation Protection and Research
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• 제26권3호
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• pp.243-248
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• 2001

Neutron reference fields of Korea Atomic Energy Research Institute (KAERI) for calibrating neutron measuring devices to be used in radiation workplace monitoring consist of two kinds of neutron spectra, the direct and the scattered neutron fields, which are produced by using radionuclide neutron sources, 252Cf and 241AmBe sources. Necessary parameters for calibration such as the anisotropy factor of each neutron source and the room-scattered fraction of some neutron surveymeters in the KAERI calibration facility were determined by calculation or measurement. Spectral measurement of scattered neutron fields were performed at each reference calibration point using a Bonner Multi-sphere Spectrometer (BMS) and the dosimetric quantities for calibration also estimated from the neutron energy spectra which were unfolded using the BUNKI code.

• 벤처창업연구
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• 제13권2호
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• pp.159-175
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• 2018

본 연구는 요양보호사의 이직의도에 직업적응이 미치는 영향에 대한 이해를 통해 요양보호사의 위기와 역경을 극복할 수 있는 요인을 규명하고 장기적으로는 요양보호사의 다양한 문제 해결에 기여하는 것을 목적으로 한다. 이를 실증적 연구과제로 확인하고자 위험요인과 보호요인, 조사대상자의 일반적 특성요인, 직업적응 및 이직의도를 선정하였으며, 요양보호사의 위험요인과 보호요인이 이직의도에 영향을 미치는데 있어서 직업적응이 매개역할을 하는지를 검증하고자 하였다. 이에 서울 경기지역의 노인의료복지시설에 재직 중인 요양보호사 291명을 대상으로 설문을 실시하여 분석한 결과는 다음과 같다. 첫째, 요양보호사의 위험요인 및 보호요인과 직업적응의 관계에서 요양보호사의 관계갈등이 심할수록, 직장문화에 대한 부적응이 높을수록 직무만족과 조직몰입에 악영향을 미치고, 정서적지지, 평가적지지, 정보적 지지가 높을수록 직무에 만족감을 느끼고 직무에 몰입하게 되는 것으로 나타났다. 둘째, 요양보호사의 위험요인 및 보호요인과 이직의도의 관계에서 요양보호사의 관계갈등이 높을수록, 직장이 불안정하다고 느길수록, 직장문화에 적응하는 것이 어렵게 느껴질수록 이직의도를 더 많이 갖게 되는 것으로 확인되었다. 마지막으로 요양보호사의 위험요인 및 보호요인과 이직의도의 관계에서 직업적응의 매개효과에 대한 검증결과, 직업적응의 하위요인인 직무만족은 매개역할을 하는 것으로 나타났지만 조직몰입은 위험요인인 직무스트레스와 이직의도의 관계에서만 매개역할을 하고, 보호요인인 자기효능감이나 사회적 지지와 이직의도의 관계에서는 매개변인 역할을 하지 않는 것으로 나타났다. 즉, 요양보호사가 평소 직무에 대한 만족감을 느끼고 있다면 직무에 대한 스트레스도 덜 받게 되고, 자기효능감이 향상될 것이며, 사회적 지지에 대한 긍정적 사고방식을 갖게 되어 이직률을 낮출 수 있다는 사실을 알 수 있다. 또한 요양보호사가 조직에 몰입하면 할수록 직무스트레스를 덜 받게 되고 이직의도를 감소시킬 수 있으나 자기효능감이나 사회적 지지에 대한 인식에는 큰 영향을 미치지 못하는 것으로 확인되었다. 이를 바탕으로 시설장은 요양보호사들이 보다 직업에 적응할 수 있도록 갈등해소를 위한 노력과 직장문화에 대한 적응도를 높일 수 있는 방안을 모색하여 시설운영의 안정을 도모하고 질 높은 서비스 제공을 위한 노력을 해야 하며, 요양보호사들의 직무만족과 조직몰입의 향상을 위한 적극적 경영전략 및 제도적 뒷받침을 위한 개발이 요구되어진다.

• 대한간호학회지
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• 제40권5호
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• pp.736-746
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• 2010

Purpose: This study was done to identify the distribution and related factors for stage of change for wearing hearing protection devices (HPDs) by workers in environments with high noise. Predictors of Use of Hearing Protection Model and Trans-theoretical Model were tested. Methods: The participants were 755 workers from 20 noisy work places in Busan and Gyeongnam. Data were collected from January to April 2008 using self-administered questionnaires, and analyzed using multiple logistic regression. Results: There were significant differences in social mode (OR=1.35, 95% CI: 1.06-1.73) between precontemplation/contemplation and preparation stage, in males (OR=2.36, 95% CI: 1.24-4.51), workers with high school education or less (OR=1.39, 95% CI: 1.28-2.78), shift workers (OR=1.50, 95% CI: 1.02-2.21), workers who previously worked in noisy places (OR=1.39, 95% CI: 1.20-2.34), and workers who had previous hearing examinations (OR=1.89, 95% CI: 1.25-2.85), in the social model (OR=1.59, 95% CI: 1.42-1.78), and self-efficacy (OR=1.05, 95% CI: 1.02-1.08) between workers in preparation and action stages, in length of time working in noisy work places (OR=2.26, 95% CI: 1.17-4.39), social model (OR=1.66, 95% CI: 1.33-2.08), and perceived benefit (OR=0.95, 95% CI: 0.93-0.97) between action and maintenance stage. Conclusion: Social model was a common factor showing differences between two adjacent stages for wearing HPDs. The results provide data for developing programs to encourage workers to wear HPDs and application of these programs in work settings.

• 지역사회간호학회지
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• 제28권4호
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• pp.463-471
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• 2017

Purpose: This study aimed to identify the association between psychosocial work environment and depressive symptoms among Korean teachers. Methods: Data on 235 elementary school teachers and 341 middle and high school teachers was obtained from the 2014 Korean Working Condition Survey. The effect of psychosocial work environment on depressive symptoms was determined by multiple logistic regression analyses. Results: The prevalence of depressive symptoms was 18 % in elementary school teachers and 24 % in middle and high school teachers. When adjusted for demographics and other socio-psychological and environmental factors, 'social community at work' served as a protection factor for Korean teachers' depressive symptoms. In addition, 'cognitive demands' in elementary school teachers and 'social support from supervisors' in middle and high school teachers were found to be predictors of depressive symptoms. Conclusion: Interventions to increase 'social community at work' and 'social support from supervisors', and to decrease 'cognitive demands' may be helpful for Korean teachers at risk of depression.

• Journal of Radiation Protection and Research
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• 제38권1호
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• pp.37-43
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• 2013

TLD를 이용하여 중성자 선량을 측정할 경우, TLD는 중성자 에너지에 대한 반응도 차이가 크기 때문에 현장 중성자장의 스펙트럼 특성에 맞는 에너지 반응도 보정이 반드시 필요하다. 본 실험에는 소형으로 가공된 TLD 소자를 사용하여 $^{252}Cf$ 중성자장에 설치된 내부구조가 복잡하고 좁은 Long-Counter (중성자 검출기) 내외부에서의 중성자 주위선량당량(ambient dose equivalent)을 측정하였다. 측정결과는 입자수송해석코드(MCNPX)를 이용한 계산결과와 비교하였다. 기존의 TLD 교정 선원인 $D_2O$ 감속 $^{252}Cf$만으로 교정하여 판독한 결과값은 전산모사 계산값과 많은 차이를 보였다. 그러나 bare 및 $D_2O$ 감속 $^{252}Cf$ 선원을 사용하여 생산한 두 교정인자를 혼용한 판독값은 계산값과 비슷하였다. 결과적으로, TLD 소자는 사용 현장과 비슷한 특성을 가지는 중성자장에서 교정되어야지만 올바른 선량평가가 가능함을 확인하였다.