Uniper and LeadChilly are beginning a collaboration with the intent to develop the reactor expertise of the longer term. To this finish, Uniper and LeadChilly are forming a three way partnership, whose first mission is to make sure funding for the development of an electrically heated prototype of LeadChilly’s SEALER idea. This prototype is deliberate to be constructed on the premises of OKG at Simpevarp in Oskarshamn, commencing operation in 2024. The collaboration is prolonged to KTH and its tutorial companions within the SSF-funded SUNRISE undertaking, which goals at designing a lead-cooled analysis reactor to be in-built Oskarshamn by 2030. Eventually, the objective of the collaboration is to allow the commercialisation of latest reactors in Sweden within the 2030’s. Through this initiative, Sweden takes a serious step in the direction of growing the next-generation passively secure nuclear energy expertise, know-how and competence.
The most vital benefit of utilizing liquid lead as coolant for a nuclear reactor is that it permits designing the reactor in a extremely compact format, with an impressive set of security options, together with:
No violent exothermic response with water
A really excessive boiling temperature, lowering the danger for lack of coolant
An wonderful potential for decay warmth elimination by pure convection
Chemical retention of iodine and caesium, ought to a gasoline failure happen
Inherent shielding of gamma radiation from fission merchandise
Moreover, using lead as coolant ends in a so referred to as “quick” neutron spectrum, which facilitates manufacturing of fissile gasoline from U-238 with a conversion ratio bigger than unity. Hence, gasoline assets improve by two orders of magnitude, making nuclear energy sustainable for 1000’s of years. Moreover, the quick neutron spectrum makes it doable to effectively transmute the long-lived waste, resembling americium and curium, into steady or short-lived fission merchandise, with a minimal of destructive side-effects on the security of reactor and fuel-cycle amenities.
SEALER (Swedish Advanced Lead Reactor) is a passively secure lead-cooled reactor designed for industrial energy manufacturing in a extremely compact format. Its gasoline isn’t changed throughout operation, which minimises prices associated to gasoline administration. The integrity of metal surfaces uncovered to liquid lead is ensured by use of alumina forming alloys, containing Three-6 wt% aluminium.
For Arctic functions, the gasoline is 2.four tons of 19.9% enriched uranium oxide, and the speed of electrical energy manufacturing could fluctuate between Three to 10 MW, resulting in a core-life between 10 and 30 years (at 90% availability).
For on-grid functions, the gasoline is 21 tons of 12% enriched uranium nitride and the rated energy is 55 MWe, resulting in an equal full energy core-life of 25 years.
The proprietor’s price of a manufacturing unit assembled SEALER-55 unit (as a part of a multi-unit plant) is estimated at € 200 M. These values embrace the price of the gasoline.
LeadChilly is a spin-off from KTH Royal Institute of Technology in Stockholm, the place J. Wallenius carried out analysis on design and security evaluation on lead-cooled reactor methods since 1996. The firm was based in 2013 by J. Wallenius, P. Szakalos and J. Ejenstam as a joint inventory firm, with its foundation in Stockholm.
(Source and picture: LeadChilly)


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