ALARP: A Tool for Criticality Safety Assessments
Suman Ghosh Dastidar
sumanghoshdastidar@gmail.com
University of Petroleum & Energy Studies, Dehradun

ABSTRACT
ALARP is the recommended standards for FAR acceptable levels in various human activities as issued by the Health and Safety Executive (HSE). These are used for comparing the achieved FAR levels to determine acceptability or otherwise of the safety level of the activity. This is embodied in the Safety Assessment Principles (SAPs) published by the Regulator, the essence of which is incorporated within the safety assessment processes of the various nuclear site licensees. The concept of ALARP within criticality safety assessments has taken some time to establish in the World. In principle, the licensee is obliged to search for a deterministic criticality safety solution, such as safe geometry vessels and passive control features, rather than placing reliance on active measurement devices and plant administrative controls.

This Article presents a consideration of some ALARP issues in relation to the development of criticality safety cases. The Article utilizes some idealized examples covering a range of issues facing the criticality safety assessor, including new plant design, operational plant and decommissioning activities. These examples are used to outline the elements of the criticality safety cases and present a discussion of ALARP in the context of criticality safety
assessments.


Keywords: ALARP, Criticality