Most of the hull is a single shell structure, accounting for 60% of the total length of the hull. The pressure hull is divided into four cabins: command cabin, missile cabin, reactor cabin and main and auxiliary engine rooms. Among them, the missile cabin is located behind the enclosure of the middle command post, with a total of 24 missile launchers. Because each subdivision is very large, unsinkability is not important, and its vitality mainly depends on concealment and the enemy's ability to find the target first.
powerplant
This class boat adopts a reactor, two steam turbines, gear transmission and single-shaft propulsion power plant. It can provide shaft power of 44. 1 MW (60000 HP).
The reactor is a distributed S8G natural circulation pressurized water reactor, which is improved on the basis of S6G and developed by General Electric Company. The thermal power of the reactor is 250MW, the core life is 500 full power days, the nuclear fuel replacement cycle is longer than 15 years, and the endurance is 1 10,000 nautical miles.
The boat does not use the main circulating pump when sailing at medium and low speed, and the coolant naturally circulates in the primary loop system. In the case of power failure or main circulating pump failure, decay heat can also be obtained, which enhances safety.
When cruising, the main circulating pump is not used, thus eliminating a big noise source. In addition, many new noise reduction technologies, sound-absorbing materials, sound insulation and vibration reduction measures against mechanical noise, floating raft vibration reduction and low-noise auxiliary machines are adopted, so the radiation noise is low, only 1 10 dB. The maximum speed without noise during cruising is about 10 knots.
The disadvantage of the power plant is its large volume and high total height, in order to improve the natural circulation capacity and widen the height difference between the primary and secondary circuits. However, due to the use of new materials, the radiation shield is light in weight. The boat is equipped with an emergency diesel-electric power device, which can make the boat return to the base at a speed of 5 knots in case of an accident.
weapon system
This class boat is equipped with 24 missile launchers. The first eight ships are equipped with Trident -I(C4) missiles with a range of 7400km. Each missile can carry eight multi-missile heads, with a power of 6,543.8+100,000 tons of TNT equivalent and a circular probability error of 300~225m.
This class 9 ~ 18 boat is equipped with Trident -II missiles with a range of 12000km. Each missile can carry 80 ~ 1 2 split-guided multi-warheads, with a power of110,000 tons or 3-4.75 million tons of TNT equivalent, and a circular error probability of 90m. From 199 1, it is restricted to carry 8 sub-warheads, and then it is restricted to carry 4~5 sub-warheads.
The bow of this class boat is equipped with four MK68 torpedo tubes, which can carry 12 MK48 multi-purpose wire-guided torpedo. Active/passive acoustic homing can reach 50/38 km at 40/55 KN, which can attack submarines or surface ships.