MS Sigyn
{{For|the 19th century barque|Sigyn (ship)}}
| {{Infobox ship begin}}
{{Infobox ship image | Ship image=File:Sigyn (kärnavfall) 2009.jpg | Ship caption=Sigyn at Stockholm, 2009 }} {{Infobox ship career | Hide header= | Ship country= Sweden | Ship flag= {{Shipboxflag|Sweden|civil}} | Ship name= M/S Sigyn | Ship namesake=Sigyn | Ship owner=SKB | Ship operator=Furetank Rederi | Ship registry= | Ship route= | Ship ordered= | Ship awarded= | Ship builder=Société Nouvelle des Ateliers et Chantiers du Havre, Le Havre, France | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down= | Ship launched=24 February 1982 | Ship sponsor= | Ship christened= | Ship completed= | Ship acquired= | Ship in service=1982-2013 | Ship out of service= | Ship renamed= | Ship reclassified= | Ship refit= | Ship struck= | Ship reinstated= | Ship homeport= | Ship identification=*{{IMO|8025941}}
| Ship motto= | Ship nickname= | Ship fate=Broken up in 2015 | Ship notes= | Ship badge= }} {{Infobox ship characteristics | Hide header= | Ship type= Cargo ship | Ship tonnage=*{{GT|4,166}}
| Ship displacement= | Ship length=*{{Convert|90.33|m|ftin|abbr=on}} o/a
| Ship beam= {{Convert|18.04|m|ftin|abbr=on}} | Ship height= | Ship draught= {{Convert|4|m|ftin|abbr=on}} | Ship depth= {{Convert|6.65|m|ftin|abbr=on}} | Ship hold depth= | Ship decks= | Ship deck clearance= | Ship ramps= | Ship ice class= | Ship power= | Ship propulsion=2 × B&W Alpha 6S28LVO diesel engines, {{Convert|2343|kW|0|abbr=on}} | Ship speed= {{Convert|12.5|kn|lk=in}} | Ship range= | Ship endurance= | Ship boats= | Ship capacity= | Ship sensors= | Ship EW= | Ship armament= | Ship armour= | Ship notes= }} |
M/S Sigyn was a ship that transported spent nuclear fuel and nuclear waste from Swedish nuclear power plants to Clab, the storage facility at Oskarshamn and the waste facilities at Studsvik and Forsmark. She was named after the goddess Sigyn, the mythological wife of Loki. Her name alluded to the role Sigyn played in holding a cup over the fettered Loki, catching the venom dripping from a viper perched above him.
Sigyn was built in 1982 by the French Société Nouvelle des Ateliers et Chantiers du Havre at Le Havre, and could transport up to ten containers for spent fuel or radioactive waste. The ship could also take one or two vehicles or standard shipping containers for low-level waste.
A stern ramp enabled roll-on/roll-off loading and unloading from the {{Convert|59|m|ft|abbr=on}} long cargo deck.
Sigyn was owned by Svensk Kärnbränslehantering AB (SKB) (Swedish Nuclear Fuel and Waste Management Company), but was operated and staffed by Furetank Rederi AB (Furetank Shipping Company)
In December 2010 it was announced that SKB have ordered a new ship from the Dutch Damen Group to replace Sigyn.{{cite web |url= http://www.world-nuclear-news.org/WR_New_ship_for_Swedish_nuclear_transport_2312101.html |title=New ship for Swedish nuclear transport |work=world-nuclear-news.org |date=23 December 2010 |accessdate=5 August 2012}} The new ship named Sigrid,[https://www.marinetraffic.com/en/ais/details/ships/shipid:327652/mmsi:266416000/imo:9631840/vessel:SIGRID Sigrid: "Details and current position"]. Marinetraffic.com Retrieved 7 December 2024. was laid down in Galați, Romania, in December 2011, and was delivered in May 2013.{{cite web |url=http://www.skb.se/Templates/Standard____33391.aspx |title=SKB builds new cargo vessel in Romania |work=skb.se |year=2012 |accessdate=6 August 2012 |url-status=dead |archiveurl=https://web.archive.org/web/20120315105539/http://skb.se/Templates/Standard____33391.aspx |archivedate=15 March 2012 }} In October 2012 this new Nuclear Cargo Vessel 1600 was launched.