For a moderate LOCA in a BWR, which set of systems are involved in the ECCS response?

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Multiple Choice

For a moderate LOCA in a BWR, which set of systems are involved in the ECCS response?

Explanation:
When a moderate LOCA occurs in a BWR, keeping the core cooled requires a coordinated response across pressure ranges. High-pressure injection systems (HPCI and HPCS) come on to deliver coolant while the reactor vessel pressure is still high, helping prevent the core from becoming uncovered. As pressure falls, the Automatic Depressurization System opens to lower the vessel pressure, enabling low-pressure equipment to operate. At low pressure, low-pressure coolant injection (LPCI) and low-pressure core spray (LPCS) continue delivering water to the core, while containment spray (CS) helps remove heat and manage containment pressure. Because the cooling needs span both high and low pressures and involve both core and containment cooling, all these systems participate in the ECCS response.

When a moderate LOCA occurs in a BWR, keeping the core cooled requires a coordinated response across pressure ranges. High-pressure injection systems (HPCI and HPCS) come on to deliver coolant while the reactor vessel pressure is still high, helping prevent the core from becoming uncovered. As pressure falls, the Automatic Depressurization System opens to lower the vessel pressure, enabling low-pressure equipment to operate. At low pressure, low-pressure coolant injection (LPCI) and low-pressure core spray (LPCS) continue delivering water to the core, while containment spray (CS) helps remove heat and manage containment pressure. Because the cooling needs span both high and low pressures and involve both core and containment cooling, all these systems participate in the ECCS response.

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