http://www.ntimc.org/newswire.php?story_id=1701&PHPSESSID=555bd374f1029001ceb49440adf1b64fThe ocean in San Diego, 1/2 a world away, rose 10 inches. It IS a
small world, after all. The "sea wall" at San Onofre Nuclear Generating Station ("SONGS") in Southern California is 35 feet tall, and about 35 years old. It could not have withstood Sunday's worst.San Onofre's twin reactors were theoretically designed to withstand
an earthquake up to 7.0, which is 100 times smaller than a 9.0
earthquake. Although a 9.0 earthquake is considered "unlikely" near
San Onofre, it is hardly impossible. In addition, the size of the
earthquake doesn't necessarily relate to the size of the ensuing
tsunami. Landslides triggered by earthquakes, asteroid impacts, and
volcanic eruptions can generate waves hundreds of feet tall.
Don't worry, we were told, because the chances are very low. It's
always about "chance" to the nuclear promoters, and never about
"worst case scenarios." We're all playing the odds. Why? Clean
energy, which has zero catastrophic risk, abounds -- we just need to
harness it.
Even a 7.2 or a 7.3 earthquake -- perfectly reasonable to expect in
the area around San Onofre, and possible anywhere -- would be more
powerful than San Onofre is officially designed to withstand.
Experience from the Northridge quake (17 January 1994) and others
shows that structures sometimes fail to withstand earthquakes of
magnitudes far less than their designed tolerances. The domes at San
Onofre might not be able to withstand an earthquake or tsunami (or
even a large jet crashing into them). The spent fuel pools, control
room, emergency diesel generators, and dry storage casks are all
outside the domes.