Unions have urged workers in the nuclear sector to accept planned pension reforms after "breakthrough" discussions with the energy minister, Jesse Norman.
It comes after the Nuclear Decommissioning Authority (NDA) began consulting on proposed cuts to final salary pension benefits across the industry on 9 January.
In January, Unite warned the government it could see industrial action if it did not listen to concerns about the proposals.
However, after a series of talks with the NDA and government officials, staff will now get an improved offer, which will be consulted on until 21 April.
It includes a betterCareer Average Revalued Earnings (CARE) option with an improved accrual rate of 1/58th. Also, overall contributions would increase by 3%, and the pension age would remain the same, which can be 60, 63 or 65.
GMB national secretary for the nuclear sector Justin Bowden said: "The original proposal for nuclear workers to 'pay more for their pensions and get less when they retire' would have caused the first ever national strike in the nuclear industry.
"Following intervention by the minister to avert industrial action, negotiations with government officials and the NDA have resulted in an improved offer which means nuclear workers will now be asked to 'pay more and get more' at the same time as government achieves pension reform.
"This new proposal will now be presented to union members in a ballot as the best that can be achieved by negotiation."
An NDA Spokesperson said: "We welcome the constructive progress made by all sides during this process. As a result, we have gone out to the workforce with a revised option to consider and have extended the consultation until 21 April so that affected employees have the opportunity to understand the revised proposal and feedback through the existing channels."
Staff will be balloted on the proposals on a date yet to be confirmed in the spring.
Nearly every trustee is confident of the next stage in their scheme’s strategy, despite almost an equal number being forced to consider replacing plans within the prior 12 months, according to research by Barnett Waddingham.
Companies could be overstating their pension liabilities by up to £60bn due to their life expectancy assumptions, according to XPS Pensions Group.
Defined benefit (DB) schemes that provide GMPs must revisit and, where necessary, top-up historic cash equivalent transfer values (CETVs) that have been calculated on an unequal basis, a landmark court judgment said last week.
Regulators must act now to impose some "proper regulation" to stop another defined benefit (DB) transfer advice disaster, saysTim Sargisson.
Opportunities for defined benefit (DB) schemes to pursue investment approaches that help repair the UK’s economy cannot stand in the way of improving member outcomes, Aegon says.