Indian nuclear submarines

IndianHawk

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Should we start tracking all tender of BARC for checking up on 190 me reactor
They do a good job checking tenders at strategic forums . You can read Gautam's post there to keep an eye on these programs. According to him S5 hull may already have been delivered by L&T.

Ofcourse no official source.

190MW reactor work has been ongoing for quite some time but I'm not sure if open tenders are available. Feel free to search.
 

IndianHawk

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Here is a post from strategic forums by Gautam . All credit belongs to him.

@Gautam Sarkar

The PMSM electric motors that we are making for the upcoming SSNs are rated at 35 MWe. The 83 MWt CLWR-B1 reactor used on the Arihant class produces around 25 MWe. The reactor does not produce enough energy to max out the under-development motors. However, the 193 MWt CLWR-B2 reactor produces enough electrical power for the motors.

The power requirements for SSNs are different from that of the SSBNs. SSBNs usually cruise along at a slower speed in safer waters. SSNs regularly venture into hostile waters & often need to sprint out of trouble. The reactors we have developed so far are for the SSBNs not SSNs. So either of the 2 reactors would need to be modified to match the needs of the SSNs. We don't know for certain which reactor will go into the SSN program.

We have more experience with the B1 reactor. But using that would result in a slower cruise speed, thus requiring a mechanical gearbox to be used as back up. The mechanical gearbox would not be used all the time but would be used to boost the speed in case of eminent danger.

Using the B2 would mean higher cruise speeds. If we have some electrical power storage system onboard then we wont need mechanical gearboxes at all. Thus the submarine would be quieter even while sprinting.

Both options are on the table. Let's see where we go from here.
 

Vamsi

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Here is a post from strategic forums by Gautam . All credit belongs to him.

@Gautam Sarkar

The PMSM electric motors that we are making for the upcoming SSNs are rated at 35 MWe. The 83 MWt CLWR-B1 reactor used on the Arihant class produces around 25 MWe. The reactor does not produce enough energy to max out the under-development motors. However, the 193 MWt CLWR-B2 reactor produces enough electrical power for the motors.

The power requirements for SSNs are different from that of the SSBNs. SSBNs usually cruise along at a slower speed in safer waters. SSNs regularly venture into hostile waters & often need to sprint out of trouble. The reactors we have developed so far are for the SSBNs not SSNs. So either of the 2 reactors would need to be modified to match the needs of the SSNs. We don't know for certain which reactor will go into the SSN program.

We have more experience with the B1 reactor. But using that would result in a slower cruise speed, thus requiring a mechanical gearbox to be used as back up. The mechanical gearbox would not be used all the time but would be used to boost the speed in case of eminent danger.

Using the B2 would mean higher cruise speeds. If we have some electrical power storage system onboard then we wont need mechanical gearboxes at all. Thus the submarine would be quieter even while sprinting.

Both options are on the table. Let's see where we go from here.
does the reactor in S4 is upgraded one or old 83MW reactor
 

THESIS THORON

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Using the B2 would mean higher cruise speeds. If we have some electrical power storage system onboard then we wont need mechanical gearboxes at all. Thus the submarine would be quieter even while sprinting.
is drdo or isro working on solid state batteries, al-air batteries ??

those have some savage energy density.

I had heard that indian oil is doing jv sort of thing with phoren startup phinenergy for al-air batteries.

And surprisingly I have seen that japs are world leader in this battery tech, jaxa had developed most advanced batteries for their rover.
 

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