10 most difficult nuclear power riddlesWeapons quiz
What is the main reason to use nuclear reactor on a submarine?
it needs no oxygen
it needs no frequent refuelling
it is silent
it is small
Nuclear reactor requires no oxygen for combustion and emits no exhaust gas. It gives the submarine the ability to operate submerged at high speeds, for unlimited periods, dependent only on the endurance of its crew. Nuclear power revolutionized the submarine, finally making it a true "underwater" vessel, rather than a "submersible" craft.
Which of these lakes is considered the most toxic in the world?
Lake Karachay is a small lake in central Russia. It is often referred to as the most polluted site on earth. Containing just one square mile of water, the lake formed a dumping ground for nuclear waste by for around 12 years.High level radioactive waste makes up almost the entire lake-bed to a depth of around 3.4 meters. Some areas surrounding the lake have radiation measurements of around 6 Sv/hour, which is enough to give a lethal dose to a human in as little as 30 minutes¹.
The USS Enterprise is a ship with the largest number of nuclear reactors. How many does she have?
Most American aircraft carriers are powered by two reactors. The only exception was the early-constructed USS Enterprise, having an eight-reactor propulsion design, with each A2W reactor taking the place of one of the conventional boilers in earlier constructions. Enterprise was meant to be the first of a class of six, but construction costs ballooned and the remaining vessels were never laid down. The design was replaced by two-reactor Nimitz class.
Which of the G8 countries is the smallest emitter of carbon dioxide?
Low carbon dioxide emission in France is a result of large investments in nuclear technology. Most electricity produced by France is generated by 59 nuclear power plants. As a side-effect renewable energies are having difficulty taking off.
Apart from power plants, who is the main user of nuclear reactors worldwide?
By 1990 there were more nuclear reactors powering ships (mostly military) than there were generating electric power in commercial power plants worldwide (however, marine reactors are much smaller). Many of these submarines and other vessels were decommissioned in the 1990s.
Which major European country has no nuclear power plants?
Italy is the only G8 country without its own nuclear power plants, having closed its last reactors in 1990. Italy relies heavily on imports and is the world's largest net importer of electricity, mostly from French nuclear power stations. The next nuclear-free economy on the European GDP list is Poland.
What makes depleted uranium a good material for making ammunition?
Depleted uranium is 1.67 times as dense as lead, 84% as dense as osmium or iridium, which are the densest known substances under standard (i.e., Earth-surface) pressures. Consequently a depleted uranium projectile of given mass has a smaller diameter than an equivalent lead projectile, with less aerodynamic drag and deeper (armor-piercing) penetration due to a higher pressure at point of impact.
What was the world's first grid-connected nuclear power plant?
Obninsk Nuclear Power Plant
Calder Hall Nuclear Power Station
Shippingport Atomic Power Station
Three Mile Island Nuclear Generating Station
Obninsk Nuclear Power Plant was built in the "Science City" of Obninsk, Kaluga Oblast, about 110 km southwest of Moscow. It remained in operation between 1954 and 2002, although its production of electricity for the grid ceased in 1959; thereafter it functioned as a research and isotope production plant only.
What is the name of the largest submarine in the world?
K-550 Alexander Nevsky
B-585 St. Petersburg
K-535 by Yuri Dolgoruky
TK-208 Dmitriy Donskoy
Dmitriy Donskoy (TK-208) is a Russian Navy nuclear ballistic missile submarine, designated Project 941 Akula class (NATO reporting name Typhoon). With the decommissioning and scrapping of her Typhoon sister boats (TK-202, TK-13, Simbirsk, Arkhangelsk, Severstal, and TK-210), she is the largest submarine in the world in active service.
What is the only physical difference between heavy water and pure water?
heavy water has greater density
heavy water is radioactive
heavy water is not translucent
heavy water conducts electricity
Heavy water contains deuterium instead of common hydrogen-1. In its pure form it has a density about 11% greater than water, but otherwise, it is physically and chemically similar. It is not radioactive. Because of greater density and stronger hydrogen-oxygen bonds, its behaviour is slightly different in some biochemical reactions. It may be toxic, but only when a large fraction of water (> 50%) in higher organisms is replaced by heavy water.