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R2E considerations for fire detectors in TCC8/ECN3
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Europe/Zurich
Attendees: G. Lerner, M. Averna, B. Morand, C. Ahdida, D.O. Wasik, J.-L. Grenard, M. Dole, N. Venzin, L.S. Esposito
Giuseppe presented on the effects of radiation on electronics, with a particular focus on Single Event Effects (SEEs) and safety assessments for commercial systems operating in diverse environments.
Key points:
- Stochastic Single Event Effects (SEEs): These occur randomly due to radiation interactions and cannot be entirely eliminated.
- Deterministic Cumulative Effects: These lead to gradual degradation and eventual failure over time.
- Soft Errors: Specifically, those caused by thermal neutrons, can be effectively shielded with thin layers of borated material.
- Emphasis was placed on the importance of focusing on SEEs to minimize safety system faults, as existing radiation limits for commercial electronics are already stringent.
- Commercial systems' tolerance to radiation is often assessed in terms of Mean Time Between Failures (MTBF).
- Identifying radiation-safe areas necessitates prioritizing protection against SEEs, which are more challenging to mitigate than lifetime degradation.
- It was noted that the directionality of radiation flux is not relevant to radiation effects, as the sensitive volume of a device is considered a cubic volume where interactions can occur irrespective of orientation.
Actions
Boris and Michael: To provide an updated layout proposal for the ASD detector position, incorporating the latest radiation level information.
Dominika: To update the simulation with the new layout proposal and provide increased resolution (e.g., in the shaft, top floor).Jean-Louis: To provide information on where the target complex ends in relation to the blue wall shown in the current layout.
Nicolas: To contact Rudy Ferraro regarding potential radiation testing of electronic components.
Jean-Louis: To evaluate the layout proposal for the ASD detector, considering technical gallery constraints.
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