   Chapter 32, Problem 50PE

Chapter
Section
Textbook Problem

A large power reactor that has been in operation for some months is turned off, but residual activity in the core still produces 150 MW of power. If the average energy per decay of the fission products is 1.00 MeV, what is the core activity in curies?

To determine

The core activity of the large power reactor with residual activity that produces a power of 150 MW of power.

Explanation

Given info:

Power produced by the reactor

P=150 MW

Average energy per decay

E=1.00 MeV

Formula:

The activity R of the core is given by,

R=PE

Calculation:

Express the energy per decay in joules.

E=1.00 MeV×1.6× 10 13J1 MeV=1.6×1013J

Calculate the activity of the core.

R=PE=150× 106J/s1

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