Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 12, Problem 12.2P
To determine
The concentration of induced activity in the reservoir after 7 days operation of the reactor.
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A large power reactor that has been in operation for somemonths is turned off, but residual activity in the core stillproduces 150 MW of power. If the average energy per decayof the fission products is 1.00 MeV, what is the core activity incuries?
A reactor operates at 400 MW with a neutron generation time of 30.0 ms. If its power increases for 5.00 min with a multiplication factor of 1.0003, what is the power output at the end of the 5.00 min?
A parallel beam of 10-MeV neutrons is normally incident on a
layer of water, 0.5 cm thick. Ignore neutron collisions with
oxygen and multiple collisions with hydrogen.
(a) How many neutron collisions per second deposit energy at
a rate of 10–7 J s–1?
(b) How many incident neutrons per second are needed to
produce this rate of energy deposition?
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- Data from the appendices and the periodic table may be needed for these problems. Show that the activity of the 14C in 1.00 g of 12C found in living tissue is 0.250 Bq.arrow_forwardFind the radiation dose in Gy for: (a) A 10-mSv fluoroscopic X-ray series, (b) 50 mSv of skin exposure by an a emitter, (c) 160 mSv of and rays from the 40K in your body.arrow_forwardData from the appendices and the periodic table may be needed for these problems. A 60Co source is labeled 4.00 mCi, but its present activity is found to be 1.85107Bq. (a) What is the present activity in mCi? (b) How long ago did it actually have a 4.00—mCi activity?arrow_forward
- Calculate the dose in Sv to the chest at a patient given an xray under the following conditions. The xray beam intensity is 1.50 W/m2, the area of the chest exposed is 0.0750 m2 35.0% of the xrays are absorbed in 20.0 kg of tissue, and the exposure time is 0.250 s.arrow_forwardA reactor is developing nuclear energy at a rate of 32000 kW. How many atoms of Uranium U235 undergo fission per second? How many kilogram of U 235 would be used up in 500 hours of operation? Assume the average energy of 200 MeV released per fission. Take Avogadro’s number 6x1023 and 1 MeV = 1.6x10-13 joule.arrow_forwardA proposed nuclear reactor facility will have an electrical power output of 937 MW with a 36.9% efficiency in converting nuclear to electrical power. Assuming the average fission reaction produces 156 MeV, how many reactions will take place at the facility every second?arrow_forward
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