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mrjohn

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Dose level
« on: Dec 18, 2008, 05:01 »
If i am instructed to ensure that my working party do not receive a dose level greater than (O.5 Msv ) gamma wholebodydose at one metre from a source what is the level in microsieverts.

wlrun3@aol.com

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Re: Dose level
« Reply #1 on: Dec 18, 2008, 07:22 »
If i am instructed to ensure that my working party do not receive a dose level greater than (O.5 Msv ) gamma wholebodydose at one metre from a source what is the level in microsieverts.
   

   ...i think what you are asking is...


   ...my crew has a stop work dose rate of .5 milli Sievert (50 milli rem) per hour at one meter...

   ...or my whole crew cannot receive more than .5 milli Sievert (50 milli rem) total collective dose during this job...

   ...what is that in micro Sievert?...



   ...the anwer is 500 micro Sievert ...




   ...1 Sievert is 100 rem...


   ...the symbol M means million...you won't have millions of Sieverts...


   ...normally in jobs of this kind, the units are in "milli" (m), which means thousandths...in your case thousandths of a Sievert, called milli Sievert (mSv)...1 milli Sievert is 100 milli rem (mrem)...


   ...let me know if this is what you needed or if i misunderstood you...

« Last Edit: Dec 19, 2008, 08:23 by wlrun3 »

Offline SloGlo

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Re: Dose level
« Reply #2 on: Dec 18, 2008, 10:31 »
mrjohn....as wlrun3 sayed, ya ain't gonna have that many sieverts.  iffen ya do, yer crew is dead.  a mega sieverts would be 1e8 rem.  ya wood not have time to complete most tasks.  if ya get instructed to hold them to 0.5e8 rem, you should thank yer boss, and go home to call the authorities.  'n tell yer crew to go home too.
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Offline SloGlo

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Re: Dose level
« Reply #3 on: Dec 19, 2008, 11:37 »
perhaps i jumpt to a conclusion two quickly.  how big is that source?  what task yinz gonna due, shielding?  iffen yer shielding is big enough 'n yer source is small enough, it may be doable.  then agin, maybe a roboshielder is in yer future.
quando omni flunkus moritati

dubble eye, dubble yew, dubble aye!

dew the best ya kin, wit watt ya have, ware yinze are!

wlrun3@aol.com

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Re: Dose level
« Reply #4 on: Dec 19, 2008, 01:48 »


   ...if its a sealed source...

   ...assuming cobalt 60 and 1000 curies...

   ...rem per hour @ 1m = .5 C E N = .5 (1000 Ci) ((1.17)(100%) + (1.33)(100%))
         
      =  1250 rem per hour @ 1m

   ...assuming 100 curies

      =  125 rem per hour @ 1m

   ...I still think he's talking about an allowable dose per worker per shift
of 50 milli rem (.5 milli Sievert)...

« Last Edit: Dec 19, 2008, 04:43 by wlrun3 »

 


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