This study analyzed and identified various causes of caustic alarms of 163 fire detectors that occurred from January 2019 to December 2021 at domestic semiconductor manufacturing plants equipped with about 30,000 fire detectors, and proposed a new non-fire prevention cause investigation plan by applying the NFPA 921 scientific methodology. The results of the study are as follows. First, in terms of necessary recognition and problem definition, an analog detector and an integrated monitoring system were proposed to quickly determine the location and installation space information of the fire detector. Second, in order to prevent speculative causes and errors in various analyses in terms of data analysis and hypothesis establishment, non-fire reports were classified into five by factor and defined, and the causes of occurrence by factor were classified and proposed. Finally, in terms of hypothesis verification and final hypothesis selection, a non-fire prevention improvement termination process and a final hypothesis verification sheet were proposed to prevent the cause from causing re-error.

1. 서 론
2. NFPA 921 과학적 방법론
    2.1 NFPA 921 과학적 방법론의 필요성
    2.2 NFPA 921 과학적 방법론의 구성
3. 반도체 공장 비화재보 원인조사 분석
    3.1 필요성 인식, 문제의 정의 : 잦은 비화재보로 인해 소방력 낭비 발생
    3.2 자료수집, 자료분석, 가설수립 : 현장상황분석의 오류 및 가설수립 시 개인주관적 의견 반영
    3.3 가설검증, 최정가설선택 : 비화재보 원인분석 능력 미흡
4. 비화재보 원인조사 방안
    4.1 필요성 인식, 문제의 정의 : 비화재보 정의명확화, 통합감시시스템을 통한 비화재보인지시간 단축
    4.2 자료수집, 자료분석, 가설수립 : 비화재보정의에 따른 원인분석 Check List 제시
    4.3 가설검증, 최정가설선택: 재오동작율을통한 개선효과 검증
5. 결론
6. References
저자 소개

• 홍상혁(우석대학교 소방·안전공학과 박사과정) | Sang-Hyuk Hong (Ph.D. Candidate, Dept. of Fire & Safety Engineering, Woosuk University)
• 공하성(우석대학교 소방방재학과 교수) | Ha-Sung Kong (Professor, Dept. of Fire and Disaster Prevention, Woosukk University) Corresponding author