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- 저자 : R. Amudhu Ramesh Kumar (검색결과 1 건)
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Design and development of enhanced criticality alarm system for nuclear applications
Padi Srinivas Reddy,R. Amudhu Ramesh Kumar,M. Geo Mathews,G. Amarendra 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.5
Criticality alarm systems (CASs) are mandatory in nuclear plants for prompt alarm in the event of anycriticality incident. False criticality alarms are not desirable as they create a panic environment for radiationworkers. The present article describes the design enhancement of the CAS at each stage andprovides maximum availability, preventing false criticality alarms. The failure mode and effect analysisare carried out on each element of a CAS. Based on the analysis, additional hardware circuits aredeveloped for early fault detection. Two different methods are developed, one method for channel loopfunctionality test and another method for dose alarm test using electronic transient pulse. The designenhancement made for the external systems that are integrated with a CAS includes the power supply,criticality evacuation hooter circuit, radiation data acquisition system along with selection of differentsoft alarm set points, and centralized electronic test facility. The CAS incorporating all improvements areassembled, installed, tested, and validated along with rigorous surveillance procedures in a nuclear plantfor a period of 18,000 h.
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