How exposure to ionizing radiation increase the chance of leuke?

Referring to following video and article, I would like to know on how exposure to ionizing radiation increase the chance of leukemia.

Does anyone have any suggestions on how it works?
Thanks in advance for any suggestions


"Exposure to ionizing radiation is known to increase the future incidence of cancer, particularly leukemia. The mechanism by which this occurs is well understood, but quantitative models predicting the level of risk remain controversial. The most widely accepted model posits that the incidence of cancers due to ionizing radiation increases linearly with effective radiation dose at a rate of 5.5% per sievert.[3] If the linear model is correct, then natural background radiation is the most hazardous source of radiation to general public health, followed by medical imaging as a close second."

https://en.wikipedia.org/wiki/Radiation-induced_cancer