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HW22-7 - 11-5 Explain whether the turbine room of a BWR is...

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11-5 6. Explain whether the turbine room of a BWR is habitable during normal oper- ation. Solution: In any water-moderated reactor, the radionuclide 16N is produced via the 160(n,p)16N reaction. This radioisotope has a half-life of 7.13 s and emits very energetic photons with energies of 6.1 and 7.1 MeV (see Appendix D). Since the 16Nis carried along with the primary water, any piping carrying the primary water/steam leaving the reactor vessel must be heavily shielded or placed in chambers not accessible by plant personnel during operation to avoid excessive radiation doses being received by workers. In a BWR the primary water includes the steam leaving the reactor and passing through the turbines. To avoid costly shielding of the piping and turbines, these plants simply closethe turbine room to workers when the reactor is operating. 7. If the demand on the generator increases (i.e., a greater load is placed on the turbine), explain what happens to the reactor power of (a) a PWR and (b) a BWR if no operator-caused reactivity changes are made. Which reactor follows
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