Australia's brand-new icebreaker, the RSV Nuyina, is out of action for the foreseeable future after checks revealed key mechanical parts needed replacing.

The Australian Antarctic Division (AAD) said the $528 million vessel was in Singapore for scheduled maintenance when hydraulic leaks related to the large couplings connected to the propulsion shafts were discovered.

The manufacturer determined the couplings needed replacing, ruling the Nuyina out from being used during the 2022-23 Antarctic season as planned.

Supply chain issues will add months of delays, and the AAD has been unable to put a date on the completion of the repairs.

"The challenge for us is to get those parts, have them manufactured and install them," AAD Director Kim Ellis said.

"Every indication to date is that that won't be completed until sometime at the beginning of 2023 … it's too early to be specific about arrival dates of Nuyina in Hobart."

It is not the first hiccup for the brand-new icebreaker, which experienced motor trouble prior to first arriving in Hobart last October.

Its maiden voyage to Antarctica was later delayed due to an issue with the alarm and monitoring system.

Two other vessels, the icebreaker Aiviq and ice-strengthened cargo ship Happy Dynamic will be used in the interim.

Mr Ellis said the core science objectives for the upcoming season would still proceed, while some marine science would take place during winter.

"This impact will be minimal on our key operational and science activities," Mr Ellis said.

The AAD expects to be able to retrieve expeditioners and deliver new personnel roughly on schedule.