Chapter 7.7, Problem 7.23YT

(a)

Interpretation Introduction

Interpretation:

Another isotope of uranium that present in the nuclear fuel pellet along with $\text{U-235}$ has to be mentioned.

Concept Introduction:

Isotopes are elements that have same atomic number but different mass number.

Radioisotopes are isotopes of an element having an unstable nucleus and dissipate energy in the form radiation in order to stabilize the nucleus.

Enriched uranium is used as fuel in both nuclear power plants. Enriched uranium is that uranium having higher percentage of $\text{U-235}$ about $\text{0}\text{.7\%}$ compared to the naturally occurring one.

(b)

Interpretation Introduction

Interpretation:

The isotope other than $\text{uranium-235}$ in the nuclear fuel is fissionable or not has to be noted.

Concept Introduction:

Isotopes are elements that have same atomic number but different mass number.

Radioisotopes are isotopes of an element having an unstable nucleus and dissipate energy in the form radiation in order to stabilize the nucleus.

Nuclear fission is a type of nuclear reaction in which heavier nuclei when bombarded with nuclear particles like neutron, will breakdown to smaller nuclei by the emission of radiation.

(c)

Interpretation Introduction

Interpretation:

The reason for the presence of various isotopes like strontium, barium, krypton and iodine in the spent fuel has to be explained.

Concept Introduction:

Isotopes are elements that have same atomic number but different mass number.

Radioisotopes are isotopes of an element having an unstable nucleus and dissipate energy in the form radiation in order to stabilize the nucleus.

Nuclear fission is a type of nuclear reaction in which heavier nuclei when bombarded with nuclear particles like neutron, will breakdown to smaller nuclei by the emission of radiation.