тест 2 АЭУ 2 курс 2 сем

20 Февраль 2014 →

2 nd Year 4th Term

Introduction to Nuclear Engineering

Module Test 1

Variant 2

Subtest 1. Choose the correct variant of translating the underlined words

To prevent neutron leakage from the core we use the reflector.

предотвращая

предотвращение

чтобы предотвратить

They use detectors to measure radioactivity.

измерение

измерять

чтобы измерять

A breeder tractor is one which is for artificial fuel production.

один из

реактор

один из реакторов

One must remember radioactivity is dangerous.

помнит

нужно помнить

запомнил

Beryllium as well as water is used as coolant.

так как

такой же

так же как

Special arrangement of fuel elements provides reasonable loading. It provides refueling of the core as well.

так

также

кроме того

Tritium is the only radioactive isotope of hydrogen.

один

только

единственный

Hydrogen has only one proton in its nucleus.

единственный

только

один

Heat exchangers are eliminated in some reactors because the coolant goes directly to the turbine.

потому что

из-за

благодаря

The coolant must be pumped through the core because of the rapid heat production.

из-за

благодаря

потому что

Ordinary water is commonly used for reactor coolant circulation.

циркуляции реактора теплоносителя

циркуляции теплоносителя реактора

реактора циркулирующего теплоносителя

Enrichment is based on the isotope separation process.

разделяющем изотопе процесса

разделяющем процессе изотопа

процессе разделения изотопа

One must know that there are two artificial isotopes.

нужно знать

знает

знал

U-235 is the only isotope that can maintain the fission chain reaction.

один

один из

единственный

Some coolants used in reactors are good moderators as well.

такие

так же как

так же

Subtest 2. Write out the words to complete the text. The first letters are given.

Nuclear fuel is a 1)s ------------ which contains the 2)r --------- amount of 3)f ------------ isotopes to produce a fission chain reaction. Most reactors use 4)e ---------uranium fuel. Fuel 5)e ------------ is based upon the isotope 6)s ---------- process. The fuel is converted to small 7)p --------- made of UO2 powder. Then they are inserted into 8)t --------- to form fuel rods which have the outer layer, 9)c ----------, made of 10)z ---------- or 11)s ----------. It prevents fission 12)f ------------- escaping to the coolant and 13)c ---------- it. The rods then are 14)a ----------- in 15)b --------. These 16)a --------- are installed in 17)g --------- plates. Such arrangement must provide reasonable fuel element 18)l --------. Some isotopes are produced19) a --------. Such process is called 20)b ----------.

3. Choose the correct variant to complete the sentences

Fuel materials which serve for producing other fuel types are called … .

enriched materials

fertile materials

fissile materials

When U-238 nucleus captures a neutron, … is produced.

plutonium-239

U-233

U-235

U-233 is produced from … .

U-235

Pu-239

thorium

The chain reaction takes place in the … .

coolant

core

heat exchanger

If heat is not removed, reactor can … its components.

expose

cool

vaporize

The heat carrier is called … .

control rods

coolant

condenser

Heat is converted into steam in a … .

heat exchanger

turbine

generator

If coolant is a gas, the heat exchanger is … .

present

eliminated с)doesn’t work

Fuel elements are to have a large … in contact with the coolant.

length

width

surface area

The core dimensions depend upon … .

fuel enrichment

fuel rods

fuel assemblies

Natural Uranium is a/an … .

U-235

mixture

artificial fuel

Enrichment is the process of removing … .

U-235

U-238

U-234

The PWR fuel assembly has … fuel tubes than BWR one.

less

more

the same

Metal used for fuel rod tubes in reactors is … .

lead

zircaloy

copper

Heat is to be removed … from the core.

slowly

at a rapid rate

eventually


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