No, you won't read the same thing around Fukushima, even if the paper is correct, because there has been no release of Strontium-90 to begin with. Mind you, there is some in the cooling water, but not in the fallout. One of the advantages to have an intact, though leaking, containment is that only volatile components can escape from it. Strontium is not among the volatile components, only noble gasses, Iodine and Caesium. You can keep most of the Caesium inside the containment, if you either have a containment spray system (which the BWR Mark I and Mark II don't have). In this case it takes about 15-20 minutes to remove 90% of it from the containment air. Without the spray, it takes about 8-10 hours to fall out inside the containment.
Unfortunately, GE said about the Mark I containment all the way back in 1966 (part 1, page 50) that it would definitively leak very soon after a meltdown, unlike PWR containments (which also have containment sprays). The old BWR containments were designed around 1960 to prevent "catastrophic death tolls", in case of any accident. Back in their time, they were not designed to prevent fallout in the surrounding area. This came later. In order to prevent those with a Mark I or Mark II, you need reinforced, passively activated, filtered containment vents. Those are required by law in Germany, France and Sweden in all nuclear power plants, including PWRs. Not so in the US or Japan for that matter. In the US, the general rule is that nuclear power plant operators are required to keep their plants up to date, but are explicitly not required to perform major changes to the plant. So, there is a lot of grandfathering going on. Installing filtered vents, seems to constitute such a "major change".
In short: Nuclear power plants are exactly as safe as they are designed to be. And they are designed to be as safe as whatever law (that currently applies to them) requires them to be. Fukushima Daiichi worked exactly as required, it's just that the requirements they were held to by the law weren't exactly stellar.