The primary responsibility in this scenario is to ensure the health and safety of staff and visitors. An external inspector has identified a potential health hazard, and a specific, highly vulnerable individual (Prof. Kumar) is known to be at risk. Applying the precautionary principle, the most ethical choice is to eliminate the immediate danger first and then investigate further. Quarantining the sarcophagus is a reversible action that neutralizes the immediate threat, creating a safe environment to then conduct further tests and facilitate a dialogue between the disagreeing parties. This choice prioritizes the ethical principle of non-maleficence (do no harm) over concerns about reputation or internal disputes, which could be damaged far more severely if a staff member or visitor were to fall ill.