ISRO, BARC join hands to develop nuclear engines/Radio thermoelectric generators for rockets

[ni8mare]

ISRO, BARC join hands to develop nuclear engines for rockets​

Updated - July 16, 2023 at 10:05 PM.

According to sources, ISRO-BARC are developing what are called Radio thermoelectric generators​

BY M RAMESH

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Logo of ISRO

India’s space agency, ISRO, is jointly developing a nuclear-powered engine along with Bhabha Atomic Research Center (BARC), it is reliably learnt.
Chemical engines, such as those that power the thrusters in satellites, are fine up to a point, but if you want to send a spacecraft deep into space, such as into inter-planetary missions, they will not do—neither can they carry that much fuel nor can they be solar powered because sunlight will not reach a solar panel at such long distances.
Hence, nuclear-powered engines.
https://www.thehindubusinessline.co...updates-27-september-2023/article67349387.ece
According to sources, ISRO-BARC are developing what are called Radio thermoelectric generators (RTGs). “The work has already begun and has been identified as a major task that has to be completed soon,” the source said.


The nuclear engines are not to be thought of as nuclear fission reactors that generate electricity. The RTGs use radioactive materials, such as Plutonium-238 or Strontium-90, which release heat as they decay.
Essentially, the engine contains two parts—the radioisotope heater unit (RHU) which generates heat, and the RTG, which converts the heat into electricity.
This heat is transferred to a ‘thermocouple’--a material that develops a voltage if there is a heat gradient across it. To put it in simple terms, think of it as a rod—if one end is hot and the other end is not, there will be a voltage across the rod (‘Seeback Effect’). The voltage can be harnessed to charge batteries that can provide motive force to a satellite. ISRO is targeting a 5W RTG, it is learnt.
“RTGs are independent of solar proximity and planetary alignment. This characteristic would help in minimising constraints like the ‘launch windows’ that the scientists have to operate within,” says Nitansha Bansal, a cyber security specialist with the Columbia University, in an article for the Observer Research Foundation (ORF).
RTGs, however, are not entirely new. US spacecrafts such as the Voyager, Cassini and Curiosity have been powered by RTGs.

 

[CallSignMaverick]

ISRO, BARC join hands to develop nuclear engines for rockets​

Updated - July 16, 2023 at 10:05 PM.

According to sources, ISRO-BARC are developing what are called Radio thermoelectric generators​

BY M RAMESH

COMMENTS
SHARE
READ LATER

Logo of ISRO

India’s space agency, ISRO, is jointly developing a nuclear-powered engine along with Bhabha Atomic Research Center (BARC), it is reliably learnt.
Chemical engines, such as those that power the thrusters in satellites, are fine up to a point, but if you want to send a spacecraft deep into space, such as into inter-planetary missions, they will not do—neither can they carry that much fuel nor can they be solar powered because sunlight will not reach a solar panel at such long distances.
Hence, nuclear-powered engines.
https://www.thehindubusinessline.co...updates-27-september-2023/article67349387.ece
According to sources, ISRO-BARC are developing what are called Radio thermoelectric generators (RTGs). “The work has already begun and has been identified as a major task that has to be completed soon,” the source said.


The nuclear engines are not to be thought of as nuclear fission reactors that generate electricity. The RTGs use radioactive materials, such as Plutonium-238 or Strontium-90, which release heat as they decay.
Essentially, the engine contains two parts—the radioisotope heater unit (RHU) which generates heat, and the RTG, which converts the heat into electricity.
This heat is transferred to a ‘thermocouple’--a material that develops a voltage if there is a heat gradient across it. To put it in simple terms, think of it as a rod—if one end is hot and the other end is not, there will be a voltage across the rod (‘Seeback Effect’). The voltage can be harnessed to charge batteries that can provide motive force to a satellite. ISRO is targeting a 5W RTG, it is learnt.
“RTGs are independent of solar proximity and planetary alignment. This characteristic would help in minimising constraints like the ‘launch windows’ that the scientists have to operate within,” says Nitansha Bansal, a cyber security specialist with the Columbia University, in an article for the Observer Research Foundation (ORF).
RTGs, however, are not entirely new. US spacecrafts such as the Voyager, Cassini and Curiosity have been powered by RTGs.

Are there any operational ones around the globe?

 

[vikan]

Are there any operational ones around the globe?

I believe so, just read an article while researching RTG costs and it seems Cassini mission used an RTG.

 

[Skull and Bones]

The guy responsible for designing and prototyping ion propulsion system in ISRO was my classmate.