Pulser Reactors Sets as Opposed to oNe Large Core.
- From: Douglas Eagleson <eaglesondouglas@xxxxxxxxx>
- Date: Wed, 21 Nov 2007 08:49:16 -0800 (PST)
Neutrons are the hard part to control. Making the small suitcase
reactor is a fairly straight forward thing. electric Kw/pound of
U-235 is the hard part.
Natural Uranium reactors or light enriched ones are the basic
commercial designs to modify. And size as a neccessity is not the
consideration. It is efficiency.
Neutron live-time is a fairly hard thing to plot for a reactor core.
Most inside core neutrons are reabsorbed, while surface neutrons leak
out. A nice steady state reaction where a constant power is exhibited
is the control goal.
Here is a super-critical pulser form of core. An idea.
Make a set of fifty to one hundred small cores. And pulse them. Each
could fire and control independently. Small neutron generators would
fire each. The advantage would be a fairly complex control system?
Standardized cored systems would make for easy constructability. So
small sets would be constructable into large reactors. Pulsing allows
the fired core to fire the next or not. A distance of five inches of
water is enough to shield the neutrons, with normal or heavy water.
So power is through a maximum excursion of the cores always.
Why do this? Because maximum excursion as independent sets allows a
maximum power per atom of Uranium. Low neutron core flux density
means low efficiency. It is dangerous to set the k to low to achieve
high power. k is the criticality constant to define the neutron power
curve.
Sets of small reactors are possibly more efficient than 1000 Megwatt
types. Making Low risk high efficiency sites possible. A single
physical site could house the 1000 megwatts with a common water
system. but, the housing would be in square tents for there would be
inherient core control. A rate of pulsing is such to allow the next.
And it is physcially impossible to make it over pulse, with good
initial design.
ROD=||
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| accelerator beam 1e1 per cm2/second
A single fuel bundle like set. pUlse with an accelerator.
A square the size of a bundle would pulse at 1 percent. Electricity
to make neutrons would be (D,D) reaction. Deuteron-Deuteron.
Easy high reliablity accelerators able to switch to the next core are
possible. Making the deuteron target the hard part, only ! A target
inside. Allowing all heavy water reactors to micro-pulse. Switch to
heavy water. And make your own with a plant.
No containment is required and the steam would never cease to cool
the single pulse if fired without any water.
These are accelerator modulated style. Power density does not ever
equilibrate, only a small exceursion occurs. Sub-Critical Pulsers.
Complete criticality was required for submarines in the old days.
Today in modern times we can use large accelerator assemblies to
complexly assist in ultra-safe low cost nuclear.
Douglas Eagleson
Gaithersburg, MD USA
.
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