What values of WT should I use for internal radiation dose calculations?

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For internal radiation dose calculations, the discussion centers on the appropriate weighting factors (WT) to use for different types of radiation exposure. The participant is uncertain whether to use WT = 1 for neutron exposure and ingested isotopes like 90Sr and 131I, or if lower values should be applied for ingested materials, specifically WT = 0.12 for stomach and WT = 0.04 for thyroid. Clarification is sought on the necessity of using WT in conjunction with dose conversion factors. The conversation emphasizes the importance of accurately determining effective dose calculations based on the type of radiation and exposure method. Accurate selection of WT values is crucial for proper internal dose assessment.
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Homework Statement



Question attached.

I want to check what values of WT I should use.

Homework Equations



Effective dose = WT*WR*WT,R

The Attempt at a Solution



For the neutron whole-body dose I have WT = 1.

For the ingested 90Sr and 131I, I also have WT = 1. Are these correct or does "ingested" mean I should take a value of WT = 0.12 (stomach), or should I use WT = 0.04 (thyroid)?

Thank you for any help
 

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Hi,
First you must calculate the effective dose du to neutrons with Wr, second calculate the effective dose du to ingestion of Sr (with dose intake conversion factor)
 
Hi, yes I've done that, I need to know what values of WT to use. But actually you said I don't need to use WT as I used a coefficient. I will send you my answer by pm.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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