Small-Break LOCAs in BWRs

The analysis of B’^WR must also consider the full range of break sizes. Peak clad temperatures tend to be highest in the design base accident (i. e., full pipe rup­ture) described above. Peak clad temperature increases with break size in the

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Подпись: Peak cladding temperature envelope (°F)

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Figue 4.31: Steam binding in a B’^TC during a hypothetical LOCA event.

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Time (seconds)

 

range (}-100 cm2 and then falls with break size before rising again, reaching the value for 100 cm2 again at around 1000 cm2 and subsequently rising again con­tinuously with break size up to the maximum possible size, i. e., full pipe rupture.