Faith-based Radiation Protection. The Pope of Protection. Robert L. Dixon Wake Forest University School of Medicine. The Ayatollah of Rad Controlla. Radiation Protection guidelines for the General Public have long ago departed the realm of Science.
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The Pope of Protection
Robert L. Dixon
Wake Forest University School of Medicine
The Ayatollah of Rad Controlla
They also have lost any connection to fundamental logic
And in their latest iteration, almost any citizen can easily recognize that they defy “common sense”
ICRP has chosen the duck as its animal model for radiation protection, Eh.
But we can still shoot the
No problem,we just can’t “nuke” ‘em
*International Council for Radiation Protection(ICRP)
Radiation Emission Standards for Nuclear Power Plants: $100 Million/life-yr
Radionuclide Emission Control at NRC- licensed facilities: $2.6 Billion/life-yr
Widen lanes on Rural Roads by 2 ft: $120,000/life-yr
_______________________________________________1. Tengs et al., Risk Analysis15, 369-390, 1995
What kind of thinking can be responsible for this egregious misallocation of resources?
Lower is always better in here
How many of you drove here ALARA?
Keep your Speed ALARA
*As Low As Reasonably Achievable
Hey, It doesn’t apply to driving – just radiation! I’m not driving ALARA (or Miss Daisy)!
Recommends “evasive action” if a solar flare is encountered in-flight! (0.1- 0.5 mSv/hr)
Thereby creating much greater risks – collision risk by chaos in air traffic control, fuel starvation by reduced jet engine efficiency at low altitudes, and many more than I have space for…
Cosmic 0.3 mSv
Internal (K-40) 0.4 mSv
Radon 2 mSv
Terrestrial 0.3 mSv
Your girl friend is “hot”
1.5 Mev gammas from K-40
To minimize exposure, try to keep close personal contact ALARA, guys
Half life = 1.3 Billion years
1.3 MeV beta (90%)
High energy gamma ray (1.5 Mev)(10%)
Oh boy, cleanup!
With which “death by coefficient” can be meted out to the frightened masses without restraint
National Safety Council: In the USA a person dies every 13 min due to a motor vehicle crash
These folks are “most sincerely” dead
LNT: Natural background radiation likewise kills a person in the USA every 12 min,
Atlantic & Gulf Coastal Plain- 1.05 mSv/yr
Middle America- 1.25 mSv/yr
Rocky Mountain Plateau- 1.45 mSv/yr
Denver Colorado- 1.65 mSv/yr
Population-weighted average-1.09 mSv/yr
Average +0.25 mSv/yr = 1.34 mSv/yr
Avg +1 mSv
So where would logic dictate setting
the public dose limit?, perhaps 5 mSv?
Au contraire – they picked 1 mSv per year
They evidently don’t believe it’s safe to live in Denver, CO
But that was after IV or V BEIRS
With “constraints” they could create a new and even lower “de facto” dose limit
Dose Limit for a Member of the General Public:
But………There’s a catch – you’re not supposed to use it unless you conduct an investigation of possible exposure to other sources (another farce by “the Solar Flare Players”-Act I, scene I next frame)
I’m from upstairs, and am conducting an ”NCRP - type” investigation-So where do you live or go after work? Is anybody else irradiating you besides me?
Behold! multiple sources!
Rule one : 1 mSv/yr
Rule two : Now Divide
Rule one by 4
Our weapons are fear, surprise, and the risk coefficient!
“Will you confess! …………………………. “Mother”
We presented our final report to NCRP, and were called before “the Pope” (like Gallileo)
Ben Archer, Joel Gray,
Bob Dixon, Doug Simpkin
Our reply to NCRP
It is futile to resist
The Myth of Multiple Sources– which fails to consider:
This argument is developed in much greater detail in our paper in published in Radiation Protection Dosimetry(2005),v.115, No. 1-4, pp. 16-22.
This logic is closely analogous to that used for “source –constraints” - ignoring simultaneity
47,000 lb of Pb
$47,000 material cost
76,500 lb of PB
Construction costs for demolition and restoration of vault $150,000
Grand total $275,000
1.5 in. Pb
1.25 in. Pb
Additional shielding thickness 2.5 cm lead
Material cost of additional lead $115,000 USD
Construction Costs per vault : $150,000 USD
Total additional cost per vault: $265,000 USD
If built when public
dose limit was 5 mSv/yr: $385,000 USD
Total estimated cost nationwide: $1 Billion!
Total lead required nationwide: 8 x 108 kg
And by the way, every pizza parlor, ice cream shop, home or business in the Denver region will have a higher radiation level than that just outside your expensive new leaded accelerator walls-
Also, those 5 people will be getting more radiation from natural radioactivity inside their own bodies than from your accelerator
Why You, of course
(real) annual risk to2:
metal miners & smelters 56 x 10-5
Construction workers 14 x 10-5
2 Wilson and Crouch, Risk-Benefit Analysis, Harvard 2001.
All major societies were invited: medical, dental, medical physics, health physics, regulatory bodies, and NCRP
“ NCRP has concluded that a suitable source control for shielding individuals in uncontrolled areas in or near medical radiation facilities is an effective dose of 1 mSv in any year. “
1 mSv.y-1 to the maximally exposed individual in an uncontrolled area will provide adequate protection to the employees and the members of the public that access the uncontrolled areas.
Madeira Portugal, May 2004
But the real perpetrator of this nonsense was outside our borders – the ICRP. Dixon receives “frag” order
“ALARA” attack profile
The ICRP staged a counterattack in DC in Aug ’06 – a North American “stakeholder” conference. I was there representing AAPM and ready for them (and their Duck); however, the stake I was holding was wooden, if you get my drift!
Your gonads took a beating, however, .
There were more .govs than .orgs at this conference (and a few .nuts)
To you from me at the NRC
Here’s one from DOE
“It is not clear to us (nor apparently to ICRP either) how to apply them in practice”.
The new ICRP tissue-weighting factors:
the gonads are dethroned(0.2 → 0.08) and the breasts are uplifted (0.05 → 0.12).”
Those once-proud doppelgangers, icons of radiation protection for decades (and ritually protected at all costs using all manner of lead accessories), have now been relegated to the “backwater of organs
I guess we’ll
have to “nuke” a bunch of them
They’re not gonna like that, Eh?
The ICRP is next- bring it on Lars-Erik
Two can play this decoy game
I later gave the duck call to an NEA conference leader who had admired and coveted it - perhaps with similar future mischief in mind?
Attempting to increase public protection by forcing the doses allowed from medical X-ray sources to Heroically low levels (10% of natural background)is likely to represent net harm to the patient population (the same public) in terms of both increased healthcare costs as well as increased health risk to individual patients, with no proven benefit whatsoever.