INS Arihant (ATV) News and Discussion -2

Gagan
BRF Oldie
Posts: 11209
Joined: 16 Apr 2008 22:25

Re: INS Arihant (ATV) News and Discussion -2

Postby Gagan » 14 Oct 2009 08:08

The image was posted in wikipedia.
Wiki allows usage of photos provided the owner is credited. Naval-tech seems to have done this.

negi wrote:Nice to see NT guys using Gagan's impression of Arihant. :)

Rahul M wrote:with your image to boot ! congrats ji !

Thank you Sir ji. :D
Rahul Saar, did you check your mail?

nrshah
BRFite
Posts: 578
Joined: 10 Feb 2009 16:36

Re: INS Arihant (ATV) News and Discussion -2

Postby nrshah » 14 Oct 2009 08:24

rajeshks wrote:May or may not be... but who want to see India in the same position as UK, Germany, South Korea and Japan. They have one thing in common, good economy but is that all?

I remember one story I studied in school. A dog who ran away from a bunglow to forest, all he wanted was freedom.


Do you find one thing in common in all the countries you listed? Yes it is - all are American allies...

With Russian, on the other hand, you will find as follows:
-Although 70% of our military hardware is from Soviet / Russia, we can buy transport planes from America without having any fear of sanctions
-We are free to reject russian awacs and go for Israel without bothering anything
-We can support ABM development proposed by America in spite of the fact that Russians were against it
-We can fly MKI which is at least a gen higher than any thing currently in Russian airforce..
-The list can continue....

-Nitin

SSridhar
Forum Moderator
Posts: 24189
Joined: 05 May 2001 11:31
Location: Chennai

Re: INS Arihant (ATV) News and Discussion -2

Postby SSridhar » 05 Nov 2009 08:33

High Fissile Fuel in Nuclear Submarine Lasts Long
BARC designed, developed and built the steam generating unit of Arihant by facing many technical challenges

“The compact Pressurized Water Reactor was designed for this purpose with several features; such as very quick response for power ramping, extremely stable undership motions and resistance against exposure to very high acceleration resulting from eventual depth charges”, Dr Sukumar Banerjee, Director, BARC said in his Founder’s Day Address

“Since the nuclear reactor is fuelled with high fissile containing fuel, it can supply energy in the submerged condition for an extended period without refuelling”, he clarified. Details about the reactor are classified.

Generally, Pressurized Water Reactors (PWR) power nuclear submarines. A PWR has a core of highly enriched uranium. When uranium nuclei undergo fission, the fission fragments carry enormous energy. They dissipate the energy in the core which gets heated up. The high pressure primary system with water as coolant removes the heat from the core continuously.

Water at high temperature enters the steam generators. In the steam generators, the heat from the water in the primary system is transferred to the secondary system to create steam. In the secondary system, the steam flows from the steam generators to drive the turbine generators, which supply the ship with electricity, and to the main propulsion turbines, which drive the propeller. After passing through the turbines, the steam condenses into water which is fed back to the steam generators by the feed pumps.

Naval reactors pitch and roll. Demands of power change rapidly. The manufacturing and quality assurance of reactor components must be of exceptionally high standard.

The reactor internals remain inaccessible for inspection or replacement throughout the long life of their core. They must be rugged and resilient. Reactor components and systems must withstand, harsh and hostile environment, long term effects of radiation, corrosion, high temperature and pressure.

As the reactor operates radiation level increases. Appropriate shields are built around the reactors to ensure radiation safety. A reactor may use over 100 tons of lead as shielding.

“Many systems and equipment designed and built were first of its kind in the country. The entire steam generating plant has been designed to give highly reliable offshore operation in a completely isolated environment”, Dr Banerjee noted.

“Control and instrumentation design is fault tolerant and requires minimum operator interventions. An elaborate diagnostic system enables a very high availability factor. Many new materials and technologies have been developed and new infrastructure has been created for this project”, he revealed.

The development of the steam generating plant of Arihant was preceded by setting up of the land based prototype system at Kalpakkam. The reactor which has been working for the past three years has served as a technology demonstrator.

“The entire plant with primary, secondary, electrical and propulsion system along with its integrated control was packed in the aft end of a land based submarine hull designed and built specifically for the purpose.

This protoype is serving as a training centre for the crew for the nuclear submarine”, Dr Banerjee said. The crew gets training with the help of an indigenously designed and built full scope simulator.

Singha
BRF Oldie
Posts: 66601
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: INS Arihant (ATV) News and Discussion -2

Postby Singha » 05 Nov 2009 09:59

the reactor should have gone critical by now and harbour acceptance trials ongoing.

Kanson
BRF Oldie
Posts: 3049
Joined: 20 Oct 2006 21:00

Re: INS Arihant (ATV) News and Discussion -2

Postby Kanson » 06 Nov 2009 10:05

High Fissile Fuel in Nuclear Submarine Lasts Long
BARC designed, developed and built the steam generating unit of Arihant by facing many technical challenges

“The compact Pressurized Water Reactor was designed for this purpose with several features; such as very quick response for power ramping, extremely stable undership motions and resistance against exposure to very high acceleration resulting from eventual depth charges”, Dr Sukumar Banerjee, Director, BARC said in his Founder’s Day Address

“Since the nuclear reactor is fuelled with high fissile containing fuel, it can supply energy in the submerged condition for an extended period without refuelling”, he clarified. Details about the reactor are classified.

Generally, Pressurized Water Reactors (PWR) power nuclear submarines. A PWR has a core of highly enriched uranium. When uranium nuclei undergo fission, the fission fragments carry enormous energy. They dissipate the energy in the core which gets heated up. The high pressure primary system with water as coolant removes the heat from the core continuously.
...

The reactor internals remain inaccessible for inspection or replacement throughout the long life of their core. They must be rugged and resilient. Reactor components and systems must withstand, harsh and hostile environment, long term effects of radiation, corrosion, high temperature and pressure.

It is very nice to see BARC talking openly about the Naval reactor and proudly so. Naturally when India was considered to be of having no prior experience in the construction of Naval reactos, everyone tends to agree with the perception that it could be a Russian reactor. Influential people like Adm. Arun Prakash talk about the reactor could be of Charlie class 2nd generation reactor or on the basis of that.
The nuclear reactor installed on the S-2, according to open source information, is understood to be based on first or second generation Soviet era technology with a short re-fuelling cycle.
That made me wonder how to reconcile this with the statement from Banerjee.
Srikumar Banerjee, BARC Director, also stressed that “the event marks the beginning of PWR technology in India.” The BARC made many design features to make this reactor compact. “There are novelties not only in the reactor’s design but in its manufacturing,” he said. For instance, the steam generator which drove the turbine to generate electricity, was compacted in a novel manner. The heart of the reactor is the steam generator.


Russian reactor reference:
Second generation reactors
Experience from the first generation reactors showed that the main operational problem was leakage of water from the primary to the secondary circuit. This occurred mainly through the steam generators. There were also problems of leaks in the pumping systems and the gaskets of the steam generators. The pumps and steam generators were intended to cool the reactor in the event of a power failure.

These experiences formed the basis for modifications introduced in the second generation reactors. Nevertheless, the loop pattern (i.e., a system of spiralling cooling pipes) was retained. The volume and distribution of the primary circuit was sharply reduced, and a system of pipes within pipes was used for the steam generators, especially for the newest pumps leading to the primary circuit.

Third generation reactors
A new block system was developed to protect the cooling circuits from leakage. By replacing the old system of pipes with a block system, in which the reactor and the cooling system were treated as one block, the dimensions of the pipes and other components could be reduced because the cooling efficiency of the system could be increased.

From a safety point of view, this solved number of problems. First of all, this system permitted a natural circulation of coolant within the primary circuit, even at high power. This was important for the flow of coolant into the reactor core at complete or partial power failure. With the block system, pipes to the primary circuit were replaced with short, wide diameter pipes which connected the main components (reactor, steam generators, and pumps).

Fourth generation reactors
The reactor for the first submarine was finished in 1995. Fourth generation nuclear reactors are formed into a single block. The monoblock design has the advantages of localising the coolant in the primary circuit into one volume of fluid and eliminates the need for pipes of wide diameter. The fourth generation reactors are constructed consistent with modern requirements for radiation safety.

SaiK
BRF Oldie
Posts: 36416
Joined: 29 Oct 2003 12:31
Location: NowHere

Re: INS Arihant (ATV) News and Discussion -2

Postby SaiK » 06 Nov 2009 19:42

http://www.bharat-rakshak.com/NEWS/news ... wsid=11822 A reactor may use over 100 tons of lead as shielding.


wow!. nobody may know exacts.. btw, nothing about noise factors.. , that I thought the author would.

Gagan
BRF Oldie
Posts: 11209
Joined: 16 Apr 2008 22:25

Re: INS Arihant (ATV) News and Discussion -2

Postby Gagan » 06 Nov 2009 19:49

Singha wrote:the reactor should have gone critical by now and harbour acceptance trials ongoing.

Wasn't there a reference that a submarine would be testing in the area south of chennai port, about 2-3 months ago?
This has to be the Arihant, which has come to Kalpakkam to get its fuel rods loaded and for the reactor to get critical.
If this is the Arihant this is quite some journey from the Vizag port to chennai. She probably would have been escorted by a few ships.
This could also mean that the harbor trails are done.

jaladipc
BRFite
Posts: 456
Joined: 15 Jan 2009 20:51
Location: i CAN ADA

Re: INS Arihant (ATV) News and Discussion -2

Postby jaladipc » 06 Nov 2009 20:54

Hmmm High fissile fuel rods...... Isnt it the same which I posted a long time back that ATV is using PWR with 40% enriched uranium?
Recalling what I put on BRF long time back: Russia and BARC co-developed the first reactor while the one that gone onto ATV is purely local made with 100% input from bharat jingos.

The only reason why BARC is confident of scaling up the reactor developed for ATV for use in AC is infact that the design is indigenous and hence provides the leverage of modifying it as we like.

However,as the fact still remains that ATV is powered by an underpowered core,hence the need for nigh fissile fuel to get the needed power.

Afterall,developing a new design in less than 5 years time and that too a miniaturised version with high level of safety checks along with needed performance is a simply indeed an incredible feat.

And with the two home built 700MW PWR reactors for domestic use will only add another feather to the BARC`s crown.Soon the scaling up of the AHWR goes online the same will be miniaturised to go onto subs and surface ships which is supposed to be on the long term wishlist of BARC and IN.(which is what I said a way back that the future subs/ships will use a mixed fuel)
JAI HIND.

Kanson
BRF Oldie
Posts: 3049
Joined: 20 Oct 2006 21:00

Re: INS Arihant (ATV) News and Discussion -2

Postby Kanson » 07 Nov 2009 08:54

btw, nothing about noise factors.. , that I thought the author would


It is obvious. The clip which shows the journos trip to Kalpakam, PRP center, registered the S1 noise in the background. You may check that with Kilo sub. Anyone had gone in the Kilo can throw the light. As i aware, the db level is less comparative to Kilo (just a wild guess).

Quietness of the sub increases with less pumps and advances in steam generation unit. You may check the US reactors S5G, S6W, S8G and S9G. Their advancement is attributed to their novelty in SG unit.

The statement, "For instance, the steam generator which drove the turbine to generate electricity, was compacted in a novel manner. The heart of the reactor is the steam generator." from BARC director give some indication about the quietness of the reactor.

Kanson
BRF Oldie
Posts: 3049
Joined: 20 Oct 2006 21:00

Re: INS Arihant (ATV) News and Discussion -2

Postby Kanson » 07 Nov 2009 08:57

AHWR goes online the same will be miniaturised to go onto subs and surface ships which is supposed to be on the long term wishlist of BARC and IN.(which is what I said a way back that the future subs/ships will use a mixed fuel)

Some of the design features of AHWR has some commonality with the general design pattern of modern Sub reactors.

D Roy
BRFite
Posts: 1176
Joined: 08 Oct 2009 17:28

Re: INS Arihant (ATV) News and Discussion -2

Postby D Roy » 07 Nov 2009 09:34

usually its the other way round.

naval reactors form the basis for civilian reactors. in fact 80 per cent of the world's reactor designs started of as naval designs.

In any case thorium fueled reactors have been considered for use before especially in America. After all Radkowsky was a naval nuclear pioneer and was patronised by admiral Rickover.

negi
BRF Oldie
Posts: 13112
Joined: 27 Jul 2006 17:51
Location: Ban se dar nahin lagta , chootiyon se lagta hai .

Re: INS Arihant (ATV) News and Discussion -2

Postby negi » 07 Nov 2009 10:42

Kanson wrote:
btw, nothing about noise factors.. , that I thought the author would


It is obvious. The clip which shows the journos trip to Kalpakam, PRP center, registered the S1 noise in the background. You may check that with Kilo sub. Anyone had gone in the Kilo can throw the light. As i aware, the db level is less comparative to Kilo (just a wild guess).

Where which clip ? Given that Arihant was not allowed to be even photographed it is highly unlikely that acoustic signature of it's reactor will be measured in presence of the journalists.

Acoustic signature of a sub or any of its machinery is a closely guarded secret and I am yet to come across a declassified source of acoustic signature of any of the world's strategic submarines in service. We only have comparative estimates out there which assume x% improvement over the older generation submarine based on some news snippet which might quote an official source stating how Seawaolf or even Astute are 10 times quieter than their predecessors .

The statement, "For instance, the steam generator which drove the turbine to generate electricity, was compacted in a novel manner. The heart of the reactor is the steam generator." from BARC director give some indication about the quietness of the reactor.

I don't know about the noise but it definitely confirms BARC's capability in designing a compact PWR for naval applications and yes this should lay to rest stories about the Akula's reactor being used by the Arihant.

Kanson
BRF Oldie
Posts: 3049
Joined: 20 Oct 2006 21:00

Re: INS Arihant (ATV) News and Discussion -2

Postby Kanson » 10 Nov 2009 14:54

Yo Yo man When did S1 become Arihant ? The clip, i guess, is from NDTV - trip to Kalpakkam for the briefing.

Ok if you dont like me using kilo, i can say when Scorpene joins the party, both Arihant and Scorpene may be vying for the top spot in the Indian inventory. Is that Ok ?

I don't know about the noise but it definitely confirms BARC's capability in designing a compact PWR for naval applications and yes this should lay to rest stories about the Akula's reactor being used by the Arihant
Same sentiment here.

shiv
BRF Oldie
Posts: 34982
Joined: 01 Jan 1970 05:30
Location: Pindliyon ka Gooda

Re: INS Arihant (ATV) News and Discussion -2

Postby shiv » 15 Dec 2009 14:32

:!: :!: :!: :D

Gagan's picture of Arihant has appeared in the latest issue of Vayu as Arihant courtesy Gagan

Philip
BRF Oldie
Posts: 21056
Joined: 01 Jan 1970 05:30
Location: India

Re: INS Arihant (ATV) News and Discussion -2

Postby Philip » 15 Dec 2009 18:42

The issue also has a Russian report on our ATV and some snippets about the earlier lease of the Charlie-2,which did have missiles,fired 5 times etc.,etc.What is interesting is that it reveals a lot more about the huge investment that we have made with Russia in building up the infrastructure for training IN submariners in operating nuclear subs and the massive tech transfers which we are getting,not to mention the reports news of more Akulas on lease.It is this kind of support which is crucial for us to eventually perfect our own baby,the ATV, and design and build improved versions of the Arihant.

Some retd. admirls have in recent times been bandying the number of SSGNs planned/required as about a dozen,apart from the SSBNs.This appears to be quite ambitious and doubtful.If we get one nuclear sub every year,one SSBN and SSGN,we would have around 5 SSBNs and 5 SSGNs each by 2020,at the most 6 each with improved production.Along with 24 conventional subs (Scorpenes,U-boats,upgraded Kilos and the second Brahmos line),with a large number with AIP,plus many mini-subs and UUVs,it would give the IN a very strong underwater fleet able to deal with any threats entering and emanating in the IOR and even in operations in the Asia-Pacific region.Tjhe Germans seem quite keen to sell us more u-boats and have stopped the sale of them to Pak.We should take advantage of this kindly act and buy two more U-214s and replace in the fullness of time,the first four similarly.

Singha
BRF Oldie
Posts: 66601
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: INS Arihant (ATV) News and Discussion -2

Postby Singha » 15 Dec 2009 18:48

well the IN allegedly chose Scorpene because they were not convinced the bleeding edge stuff in U212 (which on german navy operates) was there in U214 (export model).

between the two - french and germans theres not much to choose - both will happily sell anything to Pak so long as the money is paid.

Rampy
BRFite
Posts: 286
Joined: 25 Mar 2003 12:31
Contact:

Re: INS Arihant (ATV) News and Discussion -2

Postby Rampy » 15 Dec 2009 19:32

shiv wrote::!: :!: :!: :D

Gagan's picture of Arihant has appeared in the latest issue of Vayu as Arihant courtesy Gagan


Congratulation Gagan. BR is again the leader :D

Katare
BRF Oldie
Posts: 2579
Joined: 02 Mar 2002 12:31

Re: INS Arihant (ATV) News and Discussion -2

Postby Katare » 16 Dec 2009 02:06

Rampy wrote:
shiv wrote::!: :!: :!: :D

Gagan's picture of Arihant has appeared in the latest issue of Vayu as Arihant courtesy Gagan


Congratulation Gagan. BR is again the leader :D


No seriously, he took initiative and time to do it. Great to see something that started as a rough scratch is making its way into authentic print media with credits to Gagan.

Cain Marko
BRF Oldie
Posts: 4623
Joined: 26 Jun 2005 10:26

Re: INS Arihant (ATV) News and Discussion -2

Postby Cain Marko » 16 Dec 2009 05:54

Yes, he did take time to do it, the Arihant thread was filled with revisions by him.

Good job Gagan!

CM.

Gagan
BRF Oldie
Posts: 11209
Joined: 16 Apr 2008 22:25

Re: INS Arihant (ATV) News and Discussion -2

Postby Gagan » 16 Dec 2009 06:31

Thank you saars for the encouragement.

Err,
can someone scan that page and mail me / post it?

PS: I put up two diagrams on the wiki LCA Tejas page.

Daedalus
BRFite -Trainee
Posts: 42
Joined: 29 Aug 2008 00:57

Re: INS Arihant (ATV) News and Discussion -2

Postby Daedalus » 16 Dec 2009 07:38

Gagan wrote:PS: I put up two diagrams on the wiki LCA Tejas page.


Isn't this the trainer. I thought the navel version is a single seat one.

Gagan
BRF Oldie
Posts: 11209
Joined: 16 Apr 2008 22:25

Re: INS Arihant (ATV) News and Discussion -2

Postby Gagan » 16 Dec 2009 08:11

The naval version is supposed to be built in both a twin seater and a single seater versions. I guess the twin seater will be a trainer.

sum
BRF Oldie
Posts: 10099
Joined: 08 May 2007 17:04
Location: (IT-vity && DRDO) nagar

Re: INS Arihant (ATV) News and Discussion -2

Postby sum » 16 Dec 2009 08:56

well the IN allegedly chose Scorpene because they were not convinced the bleeding edge stuff in U212 (which on german navy operates) was there in U214 (export model).

BK mentions that France offered some "complete ToT on cutting edge stuff and much needed help in other indigenous projects( doesnt reveal too much about what it is)" which swung the IN towards the Scorpene though all and sundry in the IN were for the U-214.

Gagan
BRF Oldie
Posts: 11209
Joined: 16 Apr 2008 22:25

Re: INS Arihant (ATV) News and Discussion -2

Postby Gagan » 16 Dec 2009 08:59

^^^
Active noise cancellation and noise monitoring systems for the ATV?
The integrated sensor suite management system for the ATV? The one with the "gun" with a laser pointer that has to be aimed at the screen and the whole ship goes into battle mode.

Singha
BRF Oldie
Posts: 66601
Joined: 13 Aug 2004 19:42
Location: the grasshopper lies heavy

Re: INS Arihant (ATV) News and Discussion -2

Postby Singha » 16 Dec 2009 10:24

france has signed a deal with brazil to share nuclear propulsion technology for brazil's SSN program, most likely the amethyste class reactor.

marimuthu
BRFite
Posts: 168
Joined: 28 Mar 2005 09:17
Location: India

Re: INS Arihant (ATV) News and Discussion -2

Postby marimuthu » 16 Dec 2009 10:37

Philip wrote:The issue also has a Russian report on our ATV and some snippets about the earlier lease of the Charlie-2,which did have missiles,fired 5 times etc.,etc...........and replace in the fullness of time,the first four similarly.



Can we expect the scans to be uploaded here?

a_kumar
BRFite
Posts: 481
Joined: 18 Jun 2008 23:53
Location: what about it?

Re: INS Arihant (ATV) News and Discussion -2

Postby a_kumar » 16 Dec 2009 13:03

Gagan,

Kudos... But whatever Vayu prints cannot beat my favourite :D

Gagan wrote:This is all the ATV we are going to get to see.
Image
:(( :rotfl: :((

Gagan
BRF Oldie
Posts: 11209
Joined: 16 Apr 2008 22:25

Re: INS Arihant (ATV) News and Discussion -2

Postby Gagan » 16 Dec 2009 17:10

:mrgreen:

sumshyam
BRFite
Posts: 552
Joined: 23 Sep 2009 19:30
Location: Ganga ki dharti.
Contact:

Re: INS Arihant (ATV) News and Discussion -2

Postby sumshyam » 18 Dec 2009 13:14

Powering Up Arihant

the links says that....
Arihant will not be a regular member of the fleet, but a "technology demonstrator" ship. That's why Arihant has only four silos for SLBMs. Arihant will be used to develop and test firing SLBMs while submerged. India's existing SLBM, Sagarika, has been test fired by silos fitted to pontoons, but appears too large to fit into the Arihant silos.


I am sorry...If these are already discussed...!

narayana
BRFite
Posts: 366
Joined: 27 Jun 2008 12:01

Re: INS Arihant (ATV) News and Discussion -2

Postby narayana » 18 Dec 2009 13:45

sumshyam wrote:Powering Up Arihant

the links says that....
Arihant will not be a regular member of the fleet, but a "technology demonstrator" ship. That's why Arihant has only four silos for SLBMs. Arihant will be used to develop and test firing SLBMs while submerged. India's existing SLBM, Sagarika, has been test fired by silos fitted to pontoons, but appears too large to fit into the Arihant silos.


well four should be fine with us,As of now we ain't plan to annihilate the entire world.

Rahul M
Forum Moderator
Posts: 17051
Joined: 17 Aug 2005 21:09
Location: Skies over BRFATA
Contact:

Re: INS Arihant (ATV) News and Discussion -2

Postby Rahul M » 18 Dec 2009 14:10

strategypage is like the plague. avoid it at all cost.

sumshyam
BRFite
Posts: 552
Joined: 23 Sep 2009 19:30
Location: Ganga ki dharti.
Contact:

Re: INS Arihant (ATV) News and Discussion -2

Postby sumshyam » 18 Dec 2009 14:11

Rahul M wrote:strategypage is like the plague. avoid it at all cost.


Got it...!

vishnu.nv
BRFite
Posts: 168
Joined: 22 Aug 2007 19:32

Re: INS Arihant (ATV) News and Discussion -2

Postby vishnu.nv » 20 Dec 2009 10:40

Saturday, December 19, 2009
Exclusive: ATV's 20 Percent Criticality Certification Completed, Reactor To Begin In A Year !

Twenty percent of the safety and criticality certification of the country's first ever indigenous nuclear submarine, INS Arihant, has taken place, of the 100 odd systems which need to be certified by nuclear agencies before the propulsion system of the submarine begins functioning. Complete certification of all systems will take more than a year. The tests are being carried out at the Vishakhapatnam-based Ship Building Center.

Sources have confirmed to People's Post that the safety aspect of all the systems of the submarine are being tested in harbour before the reactor is switched on, so as to avoid any mishap, which is the normal practice worldwide.This safety certification would be given by the Russian OKBM, BARC (Bhabha Atomic Research Center) and naval agencies dealing with nuclear technology. Chief of Naval Staff, Admiral Nirmal Verma, said earlier this month that INS Arihant would be operational in two years, which implies that the reactor of the submarine would be put to test before she sails out to sea for sea trials.

Systems like cooling, safety, turbines, gear box, criticality of the fission material in the reactor, functioning of the compartments under radiation pressure will all be tested. Flushing, a phenomenon of cleaning any foreign particle which might obstruct the fission of the reactor, is being carried out, an officer told People's Post.

The reactor of the 'indigenous' INS Arihant, bought from the Russian OKBM through Rubin, located in the sixth compartment of the 8-compartment hull of the nuclear submarine, will get started once the clearance comes, said an officer, adding that before that nothing could be done, and the real trials would begin once the reactor begins, but all safety aspects have to be kept in mind. The reactor controlled by the CRDM--Controlled Red Drive Mechanism, has got neutrons seperated from the fissionable material by cadmium rods, which are removed when the reactor is to be started, and thus the reactor or the heart of the submarine begins, thereby beginning the electricity, and all other operations of the submarine. Vice Admiral B Kannan, heading the project, has admitted that the submarine is 40 percent indigenous while Russian help has been taken for the remaining 60 percent.

All those working around the submarine are supposed to wear dose recording meters,. to record how much radiation has gone into the body and if it is not within permissible limits, the personnel will be removed from the site.

There are other gadgets also to be worn at all time by those inside the sub.

The submarine has lead, concrete pipes inside to control radiation. Also out of the alpha, beta and gamma radiation, the most dangerous are gamma radiations, explained a Naval engineer. Out of the eight compartments in the ATV, only the 6th is which requires utmost care, While one by one each of the compartments get ready to activate thereby putting the ATV in harbour action, the crew working in different sections on teh submarine, will be put at risk, once the nucleus of the submarine begins..

Originally called Advanced Technology Vehicle (ATV), the submarine was launched for harbour acceptance trials on July 26, 2009, Prime Minister Dr Manmohan Singh, and only after all systems are tested and certified and the reactor put through safety tests, will the sea trials begin, which might take more than a year. The project Director General is retired Vice Admiral DSP Varma. The project, falling under the Official Secrets Act (OSA), has suffered from a record delay -- it has run for over 35 years and has consumed more than at least Rs 5,500 crore.
[url]
http://chhindits.blogspot.com/2009/12/e ... ality.html[/url]
Last edited by vishnu.nv on 20 Dec 2009 15:56, edited 1 time in total.

bart
BRFite
Posts: 712
Joined: 04 Jan 2008 21:33

Re: INS Arihant (ATV) News and Discussion -2

Postby bart » 20 Dec 2009 11:00

vishnu.nv wrote:
The reactor of the 'indigenous' INS Arihant, bought from the Russian OKBM through Rubin, located in the sixth compartment of the 8-compartment hull of the nuclear submarine, will get started once the clearance comes, said an officer, adding that before that nothing could be done, and the real trials would begin once the reactor begins, but all safety aspects have to be kept in mind. The reactor controlled by the CRDM--Controlled Red Drive Mechanism, has got neutrons seperated from the fissionable material by cadmium rods, which are removed when the reactor is to be started, and thus the reactor or the heart of the submarine begins, thereby beginning the electricity, and all other operations of the submarine. Vice Admiral B Kannan, heading the project, has admitted that the submarine is 40 percent indigenous while Russian help has been taken for the remaining 60 percent.


The project, falling under the Official Secrets Act (OSA), has suffered from a record delay -- it has run for over 35 years and has consumed more than at least Rs 5,500 crore.


Is there any link for this patronizing crap?

Philip
BRF Oldie
Posts: 21056
Joined: 01 Jan 1970 05:30
Location: India

Re: INS Arihant (ATV) News and Discussion -2

Postby Philip » 20 Dec 2009 11:55

It is more likely that the reactor "design" was acquired form Russia,not the reactor as has been reported,as BARC failed to miniatuarise the same earlier.While not downgrading our boffins achievement,it is a fact that without the generous assistance from Russia,it would not have been possible.Since the cooperation is still continuing in several spheres,it would be best to be circumspect about the same.rom all available sources,it is evident that the ATV will udnergo extensive testing which will take acouple of years at the very least before she is commissioned into IN service.What is equally significant and of keener interest to the IN right now (as the ATV is part of the strategic forces),is the impending arrival of the first Akula-2 on long term lease.This arrival will make a significant difference to the order of battle within the IOR navies.

vishnu.nv
BRFite
Posts: 168
Joined: 22 Aug 2007 19:32

Re: INS Arihant (ATV) News and Discussion -2

Postby vishnu.nv » 20 Dec 2009 15:59

Guys,

Leave all the bullshit DDM in the article. Note point that 20% of the testing of the reactor is over and testing will be completed by next year after which the Arihant will move out of harbor. Isn't that a news :D ?

Gagan
BRF Oldie
Posts: 11209
Joined: 16 Apr 2008 22:25

Re: INS Arihant (ATV) News and Discussion -2

Postby Gagan » 21 Dec 2009 07:17

Vice Admiral B Kannan, heading the project, has admitted that the submarine is 40 percent indigenous while Russian help has been taken for the remaining 60 percent.

Did Vice Admiral Kannan consent to his name being printed in this manner. And does he agree with the statement allegedly attributed to him by this lady?

I think GoI is on record as is the AEC that the Arihant's reactor is an Indian one, designed and manufactured by indian scientists in India.

For someone to say otherwise will need to be from a more credible source (Say the Arihant's program director himself writing an article a la K Santhanam wrt the TN), or the GoI itself comes out with such a statement.

The lady is biting off more than she can chew, going at this pace, no more free flights for her.

A Sharma
BRFite
Posts: 1155
Joined: 20 May 2003 11:31

Re: INS Arihant (ATV) News and Discussion -2

Postby A Sharma » 21 Dec 2009 07:52

Many a milestone

From interview with Anil Kakodkar
There were several bold decisions we took in the context of the submarine reactor, the Pressurised Water Reactor. I cannot give you the details.

Of course, building the submarine reactor was an excitement in itself.

aditp
BRFite
Posts: 447
Joined: 15 Jul 2008 07:25
Location: Autoland

Re: INS Arihant (ATV) News and Discussion -2

Postby aditp » 21 Dec 2009 09:17

vishnu.nv wrote:The submarine has lead, concrete pipes inside to control radiation. [url]
http://chhindits.blogspot.com/2009/12/e ... ality.html[/url]



:eek: Is it really possible to use concrete pipes inside a submarine. From what I know, concrete is never used in dynamic conditions of motion. And possibly the sub also carries bags of Binani Cement for damage control / repair. On's got to be completely out of ming to copy paste, concrete cladding of civilian power generation reactors and put it on a nuke sub.

shiv
BRF Oldie
Posts: 34982
Joined: 01 Jan 1970 05:30
Location: Pindliyon ka Gooda

Re: INS Arihant (ATV) News and Discussion -2

Postby shiv » 21 Dec 2009 09:51

aditp wrote:
vishnu.nv wrote:The submarine has lead, concrete pipes inside to control radiation. [url]
http://chhindits.blogspot.com/2009/12/e ... ality.html[/url]



:eek: Is it really possible to use concrete pipes inside a submarine. From what I know, concrete is never used in dynamic conditions of motion. And possibly the sub also carries bags of Binani Cement for damage control / repair. On's got to be completely out of ming to copy paste, concrete cladding of civilian power generation reactors and put it on a nuke sub.


A few months ago someone had posted pictures from a submarine - I can't recall if it was a Malaysian sub or a sub from some far eastern naval fleet. It appeared to have cement mouldings in the washroom floor.

Does anyone remember that series of pics?


Return to “Mil-Tech Archive”

Who is online

Users browsing this forum: No registered users and 0 guests