plane & line source

[sunpaw]

Or is it...

you have a plane source 20'x20' reading 15rem/hr@2". Covering that plane source is 6 feet of high density concrete. In the middle of said concrete is a 1/2" x 8' horizontal gap. what is the reading @ 2 inches from this gap?

Show your work  

[Chimera]

I want to know how you're going to get your meter through 3 feet of concrete to verify my answer.

[atomicarcheologist]

Or is it...

you have a plane source 20'x20' reading 15rem/hr@2". Covering that plane source is 6 feet of high density concrete. In the middle of said concrete is a 1/2" x 8' horizontal gap. what is the reading @ 2 inches from this gap?

Show your work  

Radius of source= 20x20=400/3.1416=11.3ft.
6'2'' < 0.7 x Radius
Thumb Rule(s)
constant D/R (15Rem/Hr) from source to 0.1Radius (1.13ft)
0.1 Radius - 0.7 Radius = 1/3 Constant D/R = 5Rem/hr.

5 Rem/Hr.  Final Answer

[Rennhack]

5 Rem/Hr.  Final Answer

I was gonna give you crap for digging up a post dead for 3 years, then I realized your handle was "Atomic Archeologist", and that's kinda your job, I suppose.

[wasteman]

give him a break, he's been working on solving the problem for three years!!

[GLW]

Roy never specified PCF,...

[atomicarcheologist]

I was gonna give you crap for digging up a post dead for 3 years, then I realized your handle was "Atomic Archeologist", and that's kinda your job, I suppose.

No wonder you're the boss!  Took the wind right out of my sails by picking up on that immediately.     I guess I'll have to pick my shovel up and go somewhere else. 
BTW,  I thought it interesting that no one got on this in three years.