Britain's Nuclear Deterrant At Risk

A serious fault has been reported in the reactor of a British submarine. Over half of the Brit's nuclear subs are out of commission now.

Experts warned the fault in the reactor of HMS Trenchant was so serious that the Trafalgar fleet may never sail again. The fracture is being treated as an “irreparable generic fault” that will prevent it from being able to carry out normal duties.

It means Britain may be forced to beg for international support in protecting our four Vanguard submarines, which carry Britain’s Trident nuclear deterrent. 

Britain deploys seven SSN nuclear-powered hunter-killers. Last week it was revealed that the four older Trafalgar-class submarines, Trenchant, Torbay, Triumph and Talent, were out of action due to repairs and maintenance.

Story here.

Bennu The Destroyer

In yesterday's post we talked about a satellite that is keeping an eye on various heavenly objects that sail through our solar system at frightening speeds. These meteoroids (small) and asteroids (large) are in an orbit about the Sun so they have a go at us every so often. Once meteoroids hit the Earth's atmosphere they become meteors. Once asteroids hit our atmosphere they are called  SHTFeroids. These objects range in size from microscopic to Texas.

The OSIRIS-REx spacecraft was launched by NASA several months ago to maintain a Game of Thrones type "Black Watch" on a celestial White Walker, Asteroid Bennu. OSIRIS-Rex will patrol the heavens without ceasing, be exposed to bad food and radiation and can never marry. This will be one pissed off satellite in a few years.

If the asteroid Bennu (with a diameter of 1640 feet) is a perfect sphere, it would have a volume of 85,602,045 cubic yards. However, asteroids are not planets and most are not shaped like them. Some asteroids are shaped like hemorrhoids; these are known as assteroids.

Some asteroids, such as Eros pictured below, are shaped like massive Idaho potatoes. But  Eros is of the planet destroying variety; it is over 21 miles across, seven miles wide and seven miles thick. It is thought to have the mass of 700 trillion french fries.

Eros, delicious baked Eros

Astronomers are still seeking a sour cream planet.

On the other hand, NASA has provided pictures of Asteroid 1999 RQ36 that indicate that it is shaped very much like a chicken McNugget; it  is 560 meters across (1837 feet) so it is a little larger than our friend Asteroid Bennu, which is only 500 meters (1640 feet) across.

Crispy, crunchy, tasty, deep-fried 1999 RQ36

A cubic yard of rocks can weigh anywhere between 2,400 and 2,900 lbs. and scientists have estimated that 1999 RQ36 weighs 66 million tons. Operating under a federal grant, NASA scientists have calculated that it would take 57 years and 202.8 billion barrels of vegetable oil to cook a McNugget the size of Asteroid 1999 RQ36 in a fryer the size of Lake Mead. Yes, I calculated the amount of oil (at 42 gallons per barrel) it would take to fill Lake Mead. I am strange that way.

However, Asteroid Bennu is different. It is indeed shaped like a rabbit turd as shown below in this NASA photo.

Asteroid Bennu

Rabbit turds are spherical. This means that more calculations are forthcoming, prepare yourselves.

Turds ala' Oryctolagus Cuniculus 

It is a very disquieting thought that a 500 meter turd traveling at .0000000006% of the speed of light could destroy a healthy chunk of our planet. But since they are spherical  we can estimate the weight of a 1600 foot rabbit turd comprised of space dust/rocks. NASA states that Asteroid 199RQ36 has the same density as water so we'll use instead the weight of water which is 1728 pounds per cubic yard. This is lighter than rocks.

Since time is of the essence (and I'm getting bored with this) we'll blow through the math. So let's see, a sphere with a radius of 250 meters has a volume of 85,602,045 cubic yards and .86 tons per cubic yard (weight of water) gives us a 73.6 million ton asteroid.

Now allow Asteroid Bennu a low celestial speed so it won't get a ticket. That's 25,000 miles per hour in a school zone which is 11,176 meters/second; that produces a kinetic energy of 4,169,823,402,272 megajoules. One ton of TNT will release about 4184 megajoules of energy.

At that speed, if Bennu crashes into the Earth, it will yield a release of energy equivalent to a 997 megaton hydrogen bomb. That's 568% more powerful than the 57 megaton Tsar Bomba nuclear device detonated by the Soviets in 1961.

The next graphic shows the estimated blast radius of a 100 megaton hydrogen bomb if dropped on NYC (surface detonation). The yellow circle is the overpressure radius, everything not a bunker is either flattened or damaged. The red circle is the temperature zone which sends most combustibles into a combusted state. Everyone within about a four or five mile radius of ground zero(fireball country) is either people vapor or charcoal.

 A 100 megaton bomb in an air burst would kill almost 11 million people and injure another 5 million. The fall out, if any, would sweep through the entire Northeast.

Imagine an explosion ten times more powerful. That would be Bennu.

It Bennu ever hit NYC, I've a 50/50 chance of surviving in Syracuse, probably less. To see what effect a nuclear device will have on your location, go here. There's a 100 megaton limit.

Then there's the matter of all the Bennu ejecta that would make its way into the atmosphere. In 1883 the eruption of Krakatoa sent enough volcanic ash and monkey dust into orbit to eliminate summer the following year. Climatologists now state that the eruption affected the world's climate for perhaps a century. Although climatologists are a skittish lot that would flay the living flesh off their own children in order to get a lucrative government grant, comparing Krakatoa to Bennu would be like farting in a hurricane.

Those Pesky Reactors

You scrimp and save and sweat and worry while raising a young reactor and this is what happens.

Tehran did its utmost to conceal the mystery blast which last week struck the heavy water reactor under construction at Arak in western Iran. It is revealed here for the first time by DebkaFile's intelligence and Iranian sources. The explosion, whether accidental or not, will delay for a second time the reactor’s first test with real fuel. Tehran informed the International Atomic Energy Agency in August of a previous holdup.

The cause of the blast and the extent of the damage it caused have not yet been established. According to the partial information initially reaching our sources, it occurred inside the reactor building when preparations were underway for a test scheduled for this month with artificial fuel and light water. The site of the explosion may have been the large coolant containers and the pressure gauges attached to the reactor’s core.

Iranian Atomic Council experts and intelligence agents are testing four possible causes of the explosion:

1. Sabotage.
2. A virus planted in the computers that control the systems administering the test.
3. An error in engineering calculations in the design of the coolant containers which underestimated their strength for standing up to the required level of pressure.
4. The deliberate sale to Iran of inferior steel materials that were not strong enough to withstand such pressure.

It's a shame when a young reactor goes astray.

H/T Atlas Shrugs