The deal is a 15-year contract to outsource weapons support at Coulport and Faslane.
The vessel set off on its journey home to Faslane from Bahrain five weeks ago.
Some activists aim to stage a further protest on Monday by forming a blockade outside Faslane.
The home of the UK's nuclear deterrent, Trident, is currently at Faslane on the Clyde.
The Navy has four submarines based at Faslane which carry Trident missiles armed with nuclear warheads.
BBC: NEWS | UK | Scotland | Glasgow and West | Anti-nuclear protesters arrested
They work at the Royal Navy Armament Depot at Coulport and the Strategic Weapon Support Building at Faslane.
The Faslane 365 campaign started in October and has seen groups travel from across the world to protest.
BBC: NEWS | UK | Scotland | Glasgow and West | Anti-nuclear protesters arrested
The submarine was built by defence giant BAE Systems at Barrow-in-Furness, Cumbria, and is based at HMNB Clyde near Faslane.
Trident's Faslane base currently employs 6, 700 military and civilian workers with that figure due to rise to 8, 200 by 2022.
The Faslane site currently employs 6, 700 military and civilian workers with that figure due to rise to 8, 200 by 2022.
But Alex Salmond and colleagues also steer clear of precise scenario planning with regard to Faslane and the removal of Trident.
The Trident missile system, Britain's nuclear deterrent, is carried by submarines based at the Faslane naval base on the Clyde, near Helensburgh.
In response, SNP leaders say that Faslane would have a continuing and significant role as the conventional naval base of an independent Scotland.
Anti-nuclear protesters chained themselves together at the gate of the Faslane naval base on the Clyde which is home to the UK's Trident weapon system.
Mr Smedjeback added that his group felt compelled to travel to Faslane as the nuclear weapons at the base were the closest to Sweden and Finland.
The UK government plans to have all Royal Navy submarines based at Faslane by 2017 which promises to create a workforce of more than 8, 000 by 2022.
BBC: No plan to move Trident from Clyde, says UK minister Hammond
The MoD says it will continue to own the bases, and oversee security and activities at Coulport and Faslane, which will continue to be subject to the same safety regulation.
It would be a very tough ask to retain so many jobs at Faslane and Coulport (the nearby base where the missiles are stored) if there were no nuclear deterrent.
The protesters - 23 from Sweden and 19 from Finland - had travelled to Scotland from their respective countries late last week and arrived at Faslane at about 0400 BST on Monday.
It was a pattern which Sheridan would repeat many times - serving jail terms for refusing to pay the poll tax and a fine after taking part in blockades at Faslane nuclear submarine base.
If Scotland's First Minister managed to get rid of the nuclear-armed submarines based in Faslane, there would be a welcome for them - if not in the hillsides - in the deep waters of Milford Haven.
The protest at pledging an oath of allegiance to the Queen, the arrest at an anti-nuclear demonstration at Faslane, the time in prison for refusing to pay her fine, the anguish of the split in her party do not form part of this story.
To rewind, an economic consultancy reported for Scottish Enterprise 10 years ago that there is a multiplier effect in the west of Scotland - that is, local businesses supply Faslane and Coulport, and then a portion of the salaries of 6, 500 people is spent on local businesses.
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