Breeder reactors are nuclear reactors that are capable of converting non-radioactive isotopes into radioactive fissionable isotopes, which can be used for generating energy, `U-238`, a non-radioactive isotope is thus converted into radioactive.

Options

A. `U-234`
B. `Pu-94`
C. `I-131`
D. `C-13`

Answer

To solve the question regarding the conversion of uranium-238 (U-238) into a radioactive fissionable isotope using a breeder reactor, we can follow these steps:

### Step 1: Understand the Concept of Breeder Reactors
Breeder reactors are designed to convert non-radioactive isotopes into radioactive isotopes that can be used for energy generation. In this case, we are focusing on uranium-238 (U-238), which is a stable isotope.

**Hint:** Breeder reactors utilize the process of artificial radioactivity to create new isotopes.

### Step 2: Identify the Reaction
In a breeder reactor, U-238 is bombarded with a neutron. This neutron can be a free neutron, which is a neutron that is not bound to any nucleus. The reaction can be represented as follows:

\[ \text{U-238} + \text{n} \rightarrow \text{X} \]

Where X is the daughter nuclide formed after the reaction.

**Hint:** Remember that the neutron must be fast-moving to effectively interact with the U-238 nucleus.

### Step 3: Determine the Daughter Nuclide
When U-238 absorbs a neutron, it becomes U-239, which is unstable. U-239 will undergo beta decay to form a new element. The decay can be represented as:

\[ \text{U-239} \rightarrow \text{Np-239} + \beta^- \]

Where Np-239 is Neptunium-239, which is also unstable and will undergo another beta decay:

\[ \text{Np-239} \rightarrow \text{Pu-239} + \beta^- \]

Thus, after two beta decays, the final product is Plutonium-239 (Pu-239).

**Hint:** Keep track of the atomic numbers and mass numbers during the decay process.

### Step 4: Write the Final Result
The final radioactive fissionable isotope produced from the conversion of U-238 in a breeder reactor is Plutonium-239 (Pu-239), which has an atomic number of 94.

**Hint:** The atomic number increases by 1 with each beta decay due to the conversion of a neutron into a proton.

### Conclusion
The radioactive fissionable isotope produced from the non-radioactive U-238 through the process in a breeder reactor is Plutonium-239 (Pu-239).

**Final Answer:** Plutonium-239 (Pu-239)