Engine List - Atomic Rockets. Rip started to announce his name, rank, and the fact that he was reporting as ordered. Commander O’Brine brushed his words aside and stated flatly, “You’re a Planeteer. I don’t like Planeteers.”      Rip didn’t know what to say, so he kept still. But sharp anger was rising inside of him. They don’t say when.

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I’ll decide that. Until I do decide, I have a job for you and your men. Do you know anything about nuclear physics?”     Rip’s eyes narrowed.

He said cautiously, “A little, sir.”     “I’ll assume you know nothing. Foster, the designation SCN means Space Cruiser, Nuclear. This ship is powered by a nuclear reactor. In other words, an atomic pile. You’ve heard of one?”     Rip controlled his voice, but his red hair stood on end with anger. O’Brine was being deliberately insulting. This was stuff any Planeteer recruit knew.

It’s more than I had expected. Well, Foster, a nuclear reactor produces heat.

We use that heat to turn a chemical called methane into its component parts. Methane is known as marsh gas, Foster. I wouldn’t expect a Planeteer to know that. It is composed of carbon and hydrogen. When We pump it into the heat coils of the reactor, it breaks down and creates a gas that burns and drives us through space.

But that isn’t all it does.”     Rip had an idea What was coming, and he didn’t like it. Nor did he like Commander O’Brine. It was not until much later that he learned that O’Brine had been on his way to Terra to see his family for the first time in four years when the cruiser’s orders were changed. To the commander, whose assignments had been made necessary by the needs of the Special Order Squadrons, it was too much. So he took his disappointment out on the nearest Planeteer, who happened to be Rip.

The tubes get coated With carbon, Foster. They also get coated with nuclear fuel. We use thorium. Thorium is radioactive. I won’t give you a lecture on radioactivity, Foster. But thorium mostly gives off the kind of radiation known as alpha particles.

Alpha is not dangerous unless breathed or eaten. It won’t go through clothes or skin.

But when mixed with fine carbon, thorium alpha contamination makes a mess. It’s a dirty mess, Foster. So dirty that I don’t want my spacemen to fool with it.(ed note: now in a real solid- core NTR, nuclear fuel leaking from the reactor elements is a major malfunction)     “I want you to take care of it instead,” O’Brine said. The deputy commander will assign you to a squadron.

Settle in, then draw equipment from the supply room and get going. When I want to talk to you again, I’ll call for you.

Now blast off, Lieutenant, and rake that radiation. Rake it clean.”     Rip forced a bright and friendly smile. Rip told him what had happened, mimicking O’Brine’s Irish accent. Cruisers don’t clean their tubes more’n once in ten accelerations. The commander is just thinking up dirty work for us to do, like I said.”     “Never mind,” Rip told him.

We’ll clean his tubes for him. Our turn will come later.”     He remembered the last thing Joe Barris had said, only a few hours before.

The residue of carbon and thorium on the blast tube walls was stubborn, dirty, and penetrating. It was caked on in a solid sheet, but when scraped, it broke up into fine powder.

Rip, who directed the work and kept track of the radiation with a gamma- beta ion chamber and an alpha proportional counter, knew they would have to undergo personal decontamination.(ed note: in a real rocket, the tubes would be in vacuum, so the crew would need space suits. The tubes would also be close to the reactor. The reactor is not very radioactive if it is shut down, except for neutron activation.)     He took a reading on the ion chamber. Only a few milliroentgens of beta and gamma radiation.

That was the dangerous kind, because both beta particles and gamma rays could penetrate clothing and skin. But the Planeteers wouldn’t get enough of a dose to do any harm at all. The alpha count was high, but so long as they didn’t breathe any of the dust it was not dangerous.

Rip divided the Planeteers into two squads, one under his direction and one under Koa’s. Each tube took a couple of hours’ hard Work.

Several times during the cleaning the men would leave the tube and go into the main mixing chamber while the tube was blasted with live steam to throw the stuff they had scraped off out into space. He saluted Rip. Rip rounded up his men. The safety officer passed the word to secure the tubes, which means we’re going to decelerate.” He smiled grimly. So remember it when you go through the control room to the decontamination chamber.”     The Planeteers nodded enthusiastically.

His entrance was met with poorly concealed grins by the spacemen. Koa fell to the deck arms flailing for balance—but . The other Planeteers rushed to pick him up, and somehow all their arms and hands beat against each other. It rose from them in a choking cloud, was picked up, and dispersed by the ventilating system. It was contaminated dust.

The automatic radiation safety equipment filled the ship with an earsplitting buzz of warning. Spacemen clapped emergency respirators to their faces and spoke unkindly of Rip’s Planeteers in the saltiest space language they could think of. There was no danger to the spacemen since they had clapped on respirators the moment the warning sounded. But even a little contamination meant the whole ship had to be gone over with instruments, and the ventilating system would have to be cleaned. Above the respirator, his face looked furious. He said innocently, “No, sir. I haven’t any more sense than that.”     The deputy grated, “I’ll have you up before the Discipline Board for this.”     Rip was enjoying himself thoroughly.

The regulations are very clear. You better run him up before the Board.”     The deputy commander made harsh sounds into his respirator. Rip had him, and he knew it. Then, just to make himself perfectly clear, he added, “Commander O’Brine was within his rights when he made us rake radiation. But he forgot one thing.

Planeteers know the regulations, too. Excuse me, sir. I have to get my men decontaminated.”     Inside the decontamination chamber, the Planeteers took off their masks and faced Rip with admiring grins. Ghost Recon Alpha Italiano Download Minecraft there. For a moment he grinned back, feeling pretty good. He had held his own with the spacemen, and he sensed that his men liked him.

Rip paid special attention to his hair, because that was where the dust was most likely to stick. He had it well lathered when the Water suddenly cut off. At the same moment, the cruiser shuddered slightly as control blasts stopped its spinning and left them all weightless.

Rip saw instantly what had happened. He called, “All right, men. Down on the floor.”     The Planeteers instantly slid to the shower deck. In a few seconds the pressure of deceleration pushed at them. Now we’re stuck in our birthday suits until we land—wherever that may be.”.