Which long-term consequence arises from reactor fission product accumulation?

💡 Explanation

Neutron ‘poisoning’ occurs because specific isotopes formed during fission exhibit high neutron absorption cross-sections; therefore, the reactor's ability to sustain nuclear fission decreases steadily, rather than improving moderator efficiency or preventing criticality under all start-up circumstances.

• Which consequence results when a photochemical reaction causes molecular dissociation in polyvinyl chloride (PVC)?
• Which outcome occurs when a smoke detector's americium-241 source ages?
• Which outcome occurs when a nickel catalyst's surface area decreases in a hydrogenation reactor?
• Which consequence results when the Fraunhofer distance is exceeded during microwave antenna radiation?
• Which outcome results when gate oxide insulating layer dielectric experiences increased electron tunneling?
• Which process initiates an insulator’s breakdown at high electric field?