"If conditions allow, maybe tomorrow night at Natanz, we can announce the opening of the centre for production of new centrifuges" for uranium enrichment, said Salehi, a vice president and head of the Iranian Atomic Energy Organisation, according to conservative news agency Fars.
"Our enemies will never be able to halt our nuclear progress.It is their bad dream and will not happen", Iranian Supreme Leader Ayatollah Ali Khamenei said in a televised speech.
The modest steps announced Tuesday appeared to be mainly aimed at signalling that Iran could resume its drive toward industrial-scale enrichment if the nuclear accord comes unravelled.
The 2015 deal limited Iran to enriching uranium only to 3.67%, far below the roughly 90% threshold of weapons-grade material.
"Yesterday he explained how he would do it - by unlimited enrichment of uranium to create an arsenal of nuclear bombs".
In his Monday meeting with German Chancellor Angela Merkel, Netanyahu warned that Iran was 'seeking nuclear weapons to carry out its genocidal designs'.
"This will inflame another religious war - this time a religious war inside Syria and the consequences will be many, many more refugees".
Prior to Netanyhau's arrival, Iranian leader Ali Khamenei declared that Israel is a "malignant cancerous tumor" that should be "removed and eradicated" in a tweet that Merkel and Netanyhau roundly condemned.More news: We're at WWDC 2018 and here's how to follow along with us!
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But President Trump dramatically pulled out of the agreement, leaving the remaining European signatories scrambling to save it. Secretary of State Mike Pompeo said the USA would re-impose its sanctions on Iran.
The agreement set strict limits on Iran's uranium enrichment - a critical component for both civil nuclear power generation and military nuclear weapons - in return for the lifting of USA and worldwide sanctions.
European signatories are scrambling to save the accord, which they see as crucial to forestalling an Iranian nuclear weapon.
Netanyahu will meet French President Emmanuel Macron on Tuesday and British Prime Minister Theresa May on Wednesday.
"Iran is trying to conquer the Middle East".
On the agenda will be the nuclear deal with Iran as well as how to push Iranian forces out of Syria.
"Although we have a different opinion on the usefulness of the deal and its effectiveness, as Germany didn't cancel the agreement as other European country didn't, we were at one in saying that this issue of regional influence on the region is worrying, particularly for the security of Israel".
She added: "We believe that this is very important for the transparency of the process".