Nuclear plants can adjust reasonably quickly in theory, but most plants don’t have the equipment to do in practice. This is because nuclear has a very low marg

Nuclear plants can adjust reasonably quickly in theory, but most plants don’t have the equipment to do in practice. This is because nuclear has a very low marginal cost of power - a kJ is very cheap if you’ve already built the plant - so the plants are intended to run full-tilt to make the most of your very expensive asset.