STATIC INSTABILITY

DYNAMIC INSTABILITY

1) Ledinegg (flow excursion) instability

1) Acoustic oscillations

2) Thermal (boiling crisis) instability

2) Density wave oscillations

3) Flow pattern (regime) transition instability

3) Thermal oscillations

4) Interfacial instabilities

4) Boiling water reactor (BWR) instability

5) Burnout and Quenching instability

5) Parallel channel instability

6) Unstable vapour formation (bumping, geysering, vapor burst)

6) Condensation oscillation

7) Condensation Chugging

7) Pressure drop oscillation

8) Flashing instability

8) Channel instability

9) Non-equilibrium-state instability

9) Core-wide instability

10) Flow distribution instability

10) Regional instability