Q.49

Expert-verifiedFound in: Page 1237

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

137 Cs is a common product of nuclear fission. Suppose an accident spills 550 mCi of 137 Cs in a lab room.

a. What mass of 137 Cs is spilled?

b. If the spill is not cleaned up, how long will it take until the radiation level drops to an acceptable level, for a room this size, of 25 mCi?

Number of atom is,

1Ci= 3.7x10^{10} Bq

so,

And final decay rate of ^{137}Cs is calculated as follows,

Substitute 30 year for t_{1/2} from Appendix C in above final rate equation.

Here is the mass of uranium 6.32x10^{-6}kg

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