Which system responds in a BWR during a small LOCA to ECCS?

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Multiple Choice

Which system responds in a BWR during a small LOCA to ECCS?

Explanation:
In a BWR facing a small LOCA, the immediate protection comes from the high-pressure ECCS. The High Pressure Coolant Injection and High Pressure Core Spray are designed to operate while reactor pressure is still high, delivering borated water to keep the core covered and provide cooling without needing to depressurize. Low-pressure systems would only take over if the pressure falls enough to require injection at lower pressure, which is not the initial response in a small break scenario. So, the automatic and most direct response is the high-pressure injection and spray.

In a BWR facing a small LOCA, the immediate protection comes from the high-pressure ECCS. The High Pressure Coolant Injection and High Pressure Core Spray are designed to operate while reactor pressure is still high, delivering borated water to keep the core covered and provide cooling without needing to depressurize. Low-pressure systems would only take over if the pressure falls enough to require injection at lower pressure, which is not the initial response in a small break scenario. So, the automatic and most direct response is the high-pressure injection and spray.

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