Re: Radioactivety
- From: Mark <Mark@>
- Date: Tue, 21 Jun 2005 14:50:48 +0200
On Tue, 21 Jun 2005 12:34:42 GMT, "CWatters"
<colin.watters@xxxxxxxxxxxxx> wrote:
>
>"Mark" <Mark@> wrote in message
>news:oevfb1d8q1p6r9bvfbcgsrbf8ktekv9hhh@xxxxxxxxxx
>> Not sure where to post this question, please advise if you know a
>> better place.
>>
>> I live near a massive quarry and in conversation with one of my
>> neighbours, they said that they thought that there was uranian being
>> dug up. I did'nt like the sound of that so I bought a cheap Portable
>> Dose Rate Meter (A plessey PDRM 82 (off ebay for under £20 to check
>> for myself. The meter was brand new in the box, manufactured in the
>> 60/70's. The problem is I do not know what levels are safe and even if
>> this meter is sensitive enough. It reads 0.0 after going through a
>> test procedure. The units of measurement are in cGy/h (in air), does
>> anybody know about this meter and is it any good for what I want?
>
>I don't think that model is sensitive enough to detect what you are looking
>for. If you get any kind of reading run fast....
>
>http://www.geocities.com/HotSprings/Falls/1984/detect.htm
>
>Quote: As mentioned, the only downside with the PDRM 82 is that its digital
>reading is from 0.1 cGray/hr 300 cGray/hr (remembering that a CentiGray is
>equal to a REM) making the scale too high for use with most nuclear
>accidents
>(but ideal for nuclear war use). END Quote.
>
>So lets work some numbers...
>
>1 CentiGray = 1 Roentgen = REM = 10mSievert.
>
>...so your meter starts reading at 1m Sievert per Hour.
>
>So lets google for safe levels...
>
>http://www.deh.gov.au/ssd/faqs/radiation.html
>Quote: At present, the Australian dose limit for an activity such as uranium
>mining is 1 mSv per year to a member of the public, and 20 mSv per year
>(averaged over 5 years) for a worker at the mine. End Quote
>
>Note that's 1mSv per YEAR where as your meter only detects anything above
>1mSv per HOUR. Thats a factor of about 8760. or look at it this way... That
>mine could be exceeding the safe level by a factor of 8760 before your meter
>would start to detect it.
>
>At least I think I've got my sums right (too hot here today).
Yes its hot here too, I thought it might have been the Uranium kicking
in. Joking apart thanks for taking the time to answer my question.
Back on Ebay it goes, regards.
.
- References:
- Radioactivety
- From: Mark
- Re: Radioactivety
- From: CWatters
- Radioactivety
- Prev by Date: Re: Radioactivety
- Next by Date: M/A-COM Discontinued Parts Supplier
- Previous by thread: Re: Radioactivety
- Next by thread: Re: Radioactivety
- Index(es):
Relevant Pages
|
