The Hunt for Red October - Tom Clancy [96]
The Alfa reactor plant was small. It had to fit into a relatively small hull. It was also powerful for its size, and this one had been running at one hundred percent rated power for just over four days. They were racing for the American coast at 42.3 knots, as fast as the eight-year-old plant would permit. The Politovskiy was due for a comprehensive overhaul: new sonar, new computers, and a redesigned reactor control suite were all planned for the coming months. Petchukocov thought it irresponsible—reckless—to push his submarine so hard, even if everything were functioning properly. No Alfa plant on a submarine had ever been pushed this hard, not even a new one. And on this one, things were beginning to come apart.
The primary high-pressure reactor coolant pump was beginning to vibrate ominously. This was particularly worrying to the engineer. There was a backup, but the secondary pump had a lower rated power, and using it meant losing eight knots of speed. The Alfa plant achieved its high power not with a sodium-cooled system—as the Americans thought—but by running at a far higher pressure than any reactor system afloat and using a revolutionary heat exchange system that boosted the plant's overall thermal efficiency to forty-one percent, well in excess of that for any other submarine. But the price of this was a reactor that at full power was red-lined on every monitor gauge—and in this case the red lines were not mere symbolism. They signified genuine danger.
This fact, added to the vibrating pump, had Petchukocov seriously concerned; an hour earlier he had pleaded with the captain to reduce power for a few hours so that his skilled crew of engineers could make repairs. It was probably only a bad bearing, after all, and they had spares. The pump had been designed so that it would be easy to fix. The captain had wavered, wanting to grant the request, but the political officer had intervened, pointing out that their orders were both urgent and explicit: they had to be on station as quickly as possible; to do otherwise would be "politically unsound." And that was that.
Petchukocov bitterly remembered the look in his captain's eyes. What was the purpose of a commanding officer if his every order had to be approved by a political flunky? Petchukocov had been a faithful Communist since joining the Octobrists as a boy—but damn it! what was the point of having specialists and engineers? Did the Party really think that physical laws could be overturned by the whim of some apparatchik with a heavy desk and a dacha in the Moscow suburbs? The engineer swore to himself.
He stood alone at the master control board. This was located in the engine room, aft of the compartment that held the reactor and the heat exchanger/steam generator, the latter placed right at the submarine's center of gravity. The reactor was pressurized to twenty kilograms per square centimeter, about twenty-eight hundred pounds per square inch. Only a fraction of this pressure came from the pump. The higher pressure caused a higher boiling point for the coolant. In this case, the water was heated to over 900° Celsius, a temperature sufficient to generate steam, which gathered at the top of the reactor vessel; the steam bubble applied pressure to the water beneath, preventing the generation of more steam. The steam and water regulated one another in a delicate balance. The water was dangerously radioactive as a result of the fission reaction taking place within the uranium fuel rods. The function of the control rods was to regulate the reaction. Again, the control was delicate. At most the rods could absorb just less than one percent of the neutron flux, but this was enough either to permit the reaction or to prevent it.
Petchukocov could recite all this data in his sleep. He could draw a wholly accurate schematic diagram of the entire engine plant from memory and could instantly grasp the significance of the slightest change in his instrument readings. He stood perfectly straight over the control board, his eyes tracing