Christopher Huxtable, 34, from Swansea, Ken Cresswell, 57, and John Shaw, 61, both from Rotherham, are still missing in the rubble.
Relatives of the trapped Coleman and Company demolition workers have criticised delays in the rescue operation following the turbine hall collapse on February 23.
Emergency services have been waiting for a safe method of working plan from site owners RWE.
A joint statement from HSE and Thames Valley Police said: “RWE has today presented a plan to the Health and Safety Executive (HSE) and Thames Valley Police (TVP) to commence work on the collapsed debris, ready to recover the missing men.
“Starting today, large equipment and people will be arriving on site to start work to enable the recovery operation to resume at the weekend, sooner if possible.
“Progress with the plan over the coming days will be closely monitored by HSE and TVP.
“Our priority remains the recovery of the missing men so they can be returned to their families and to understand what caused this incident.
“Specialist officers from Thames Valley Police continue to support the families and are providing them with regular updates on the progress of this work.”