> Plasma is made and sent outside the ship to provide reaction mass and
> therefore thrust for the ship SO how can you say that fusion products
> are not vented? The fusion product of plasma is vented and yes it is
> radioactive, though only for a short time.
You're confusing possible meanings of the phrase "fusion products."
By "fusion product" I mean the direct products of the act of fusion
itself, the fusing nuclei, the stuff that remains in the reactor.
Your use of "fusion product" is in the sense that electricity is a product
of a coal-fired power plant, which it is. But the direct product of that
coal burning is the ash and sulfur dioxide. The electricity comes from
harnessing the heat released.
So in the HEPlaR example, neither the direct fusion product, nor any of
its direct effects, are released. These remain in the fusion reactor.
Harnessing the heat through the heat exchanger, as you quote, results in a
secondary product, like the coal fire heating water to turn a turbine.
These heat exchangers do not cause the hydrogen to begin fusing, but
merely heat it to a plasma state. So the direct fusion products are
retained in the core, and the HEPlaR does not cause any fusion to take
place outside of the fusion core.
So the reason I said that is because I was using a different meaning of
"fusion products" than you assumed. Your use of "fusion products" would
more accurately be called "by products" or "secondary products," with the
thrust itself being that secondary product via the heat exchanger.
You then re-introduce your point from the earlier message about the plasma
itself releasing radioactivity, which I've discussed in my previous
response. However, simply because the plasma releases radiation does not
mean it is a fusion product from the fusion core, anymore than getting an
electrical shock from a coal-fired power plant means that you got sulfur
dioxide poisoning.
> David Nilsen wrote:Â HEPlaR is designed so that fusion products are
> not vented into the exhaust. That CAN be done, the same way that in a
> pressurized water nuclear reactor the steam that goes into the turbine
> is not radioactive.
> The primary coolant that goes through the core passes heat to the
> secondary coolant that goes into the turbines. That's the same
> premise
> with HEPlaR.
>
> I donât agree with this premise.
>
> HEPlaR or High Efficiency Plasma Recombustion requires a heat
> exchanger recombustion chamber. Hydrogen is injected into the
> recombustion chamber and the power generated by the engine (fusion
> power plant) heats the hydrogen to a plasma state. The plasma is then
> released as a high velocity stream of reaction mass (FF&S Pg 70)
>
> Plasma is made and sent outside the ship to provide reaction mass and
> therefore thrust for the ship SO how can you say that fusion products
> are not vented? The fusion product of plasma is vented and yes it is
> radioactive, though only for a short time.
>
> Â
>
> Enjoy!
>
> Craige
>
>
>
> therefore thrust for the ship SO how can you say that fusion products
> are not vented? The fusion product of plasma is vented and yes it is
> radioactive, though only for a short time.
You're confusing possible meanings of the phrase "fusion products."
By "fusion product" I mean the direct products of the act of fusion
itself, the fusing nuclei, the stuff that remains in the reactor.
Your use of "fusion product" is in the sense that electricity is a product
of a coal-fired power plant, which it is. But the direct product of that
coal burning is the ash and sulfur dioxide. The electricity comes from
harnessing the heat released.
So in the HEPlaR example, neither the direct fusion product, nor any of
its direct effects, are released. These remain in the fusion reactor.
Harnessing the heat through the heat exchanger, as you quote, results in a
secondary product, like the coal fire heating water to turn a turbine.
These heat exchangers do not cause the hydrogen to begin fusing, but
merely heat it to a plasma state. So the direct fusion products are
retained in the core, and the HEPlaR does not cause any fusion to take
place outside of the fusion core.
So the reason I said that is because I was using a different meaning of
"fusion products" than you assumed. Your use of "fusion products" would
more accurately be called "by products" or "secondary products," with the
thrust itself being that secondary product via the heat exchanger.
You then re-introduce your point from the earlier message about the plasma
itself releasing radioactivity, which I've discussed in my previous
response. However, simply because the plasma releases radiation does not
mean it is a fusion product from the fusion core, anymore than getting an
electrical shock from a coal-fired power plant means that you got sulfur
dioxide poisoning.
> David Nilsen wrote:Â HEPlaR is designed so that fusion products are
> not vented into the exhaust. That CAN be done, the same way that in a
> pressurized water nuclear reactor the steam that goes into the turbine
> is not radioactive.
> The primary coolant that goes through the core passes heat to the
> secondary coolant that goes into the turbines. That's the same
> premise
> with HEPlaR.
>
> I donât agree with this premise.
>
> HEPlaR or High Efficiency Plasma Recombustion requires a heat
> exchanger recombustion chamber. Hydrogen is injected into the
> recombustion chamber and the power generated by the engine (fusion
> power plant) heats the hydrogen to a plasma state. The plasma is then
> released as a high velocity stream of reaction mass (FF&S Pg 70)
>
> Plasma is made and sent outside the ship to provide reaction mass and
> therefore thrust for the ship SO how can you say that fusion products
> are not vented? The fusion product of plasma is vented and yes it is
> radioactive, though only for a short time.
>
> Â
>
> Enjoy!
>
> Craige
>
>
>