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Journal Article

Citation

Shibagaki M, Fukuda T, Sato Y. J. Japan Soc. Safety Eng. 2017; 56(3): 194-205.

Copyright

(Copyright © 2017, Japan Society for Safety Engineering)

DOI

10.18943/safety.56.3_194

PMID

unavailable

Abstract

Hazards can be described by turning them into the model of process by which a systems state is successively changed by internal or external actions and finally becomes in a state of harm. It is essential to study how those changes of the systems state and actions are related to the causation of harm in order to identify hazards and to derive measures for control of the hazards. This paper provides, firstly, a technique "state-action(S-A)process chart" which makes it possible to schematize the process of hazard and therefore to identify hazards systematically. Next, systematic procedures to study and derive measures for controlling hazards identified are presented by use of the S-A process chart based on the hazard-control principles of: a)elimination of hazards, b)control of states changes and c)control of states transitions. Then, hazards caused by environmental test chambers being suspended are identified and control measures for the identified hazards are conceptually designed to demonstrate the validity of S-A process chart.


ハザードは,システムの状態が内部及び外部からの作用によって次々と変化して危害に至るプロセスとして把握できる.ハザードを同定し, その抑制策を導出するためには,状態と作用を時系列上で把握する必要がある.本論文では,まず作用によって,システムの状態が危害へ向かって遷移していくプロセスを,"状態-作用(S-A)プロセスチャート"で表現することを提案している.次に,ハザード抑制の基本原理(a)ハザードの除去,(b) 望ましくない状態変化を抑制する,(c)ハザード制御により安全な状態へ移行する,に基づき,S-A プロセスチャートを用いてハザードの抑制策を体系的かつ系統的に導出する方法を示している.そして,環境試験槽の停止に起因するハザードの同定及び抑制策導出にS-A プロセスチャートを適用して,その有効性を実証している.


Language: ja

Keywords

Control action; Hazard controls; Hazard identification; S-A process chart; S-A プロセスチャート; Transition action; ハザード同定; ハザード抑制策; 抑制作用; 遷移作用

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