Unite union members had warned of strikes over bonus pay, but it has now been agreed that interim bonuses will be paid out until the end of August.
A long-term settlement will also be considered by union officials and EDF Energy, which is behind the scheme.
Hinkley Point C is expected to be operational in 2025.
Unite officer, Jerry Swain, said the interim agreement was "crucial" in providing a "breathing space" and "creating the opportunity for a long-term solution".
"I am pleased that following consultation with our stewards and members that we have been able to agree a clear path forward," he said.
"And that the prospect of industrial action, which is always a last resort, can be taken off the agenda in order to allow the panel to deliberate."
Nigel Cann, of EDF, said it has created a "very competitive reward structure" for its workforce.
"We are pleased that these interim arrangements allow constructive dialogue to continue to finalise this important agreement," he said.
"Unite has been a constructive partner in the discussions to date and I look forward to this continuing throughout the construction of the Hinkley Point C power station."
The threat of industrial action by workers building the Hinkley Point nuclear power station has been averted due to an interim pay deal.