Murco has denied rumours the refinery will close and says it is working with a potential buyer who wants to run the site as a business.
Opponents say that offshore power and Wylfa Newydd's power could instead be piped under the sea - the most costly option.
With exactly half the seats in the Assembly, Labour needs at least one of the other parties to support its budget or abstain.
A 10-year vision for a more highly skilled Wales is to be unveiled later by the Welsh Government.
Ken Skates, the Deputy Minister for Skills and Technology, will launch the Welsh Government's new Policy Statement on Skills, which sets out the "responsible action needed by all stakeholders to develop a resilient, responsive and sustainable post-19 skills system.
The Welsh Government says it also recognises the "tough choices ahead" if Wales is to deliver the skills needed to raise productivity levels and reduce barriers into employment.
Nearly 18,000 jobs are set to be created in the Welsh construction industry over the next five years, according to figures released today.
The Construction Industry Training Board says the Welsh Government's help to buy scheme - plus proposed major infrastructure projects - are fuelling growth in the sector.
Ian Lang reports.
Ken Skates AM, the Deputy Minister for Skills and Technology, has set out a 10-year vision for employment and skills policy, with the aim " to support Wales to evolve into a highly-skilled nation and to create the conditions which allow businesses in Wales to grow and flourish"
Since taking up the post of Deputy Minister, I have spoken of my three main priorities: alignment, employability and engagement. Each of these are key to our 10 year vision for a more highly-skilled Wales.
The Policy Statement on Skills will outline how we aim to build a skills base that is fully responsive to the needs of our economy, equipping those who are looking for work and those in work with the skills Wales needs to be economically competitive.
– Ken Skates AM, Deputy Minister for Skills and Technology
If we're going to be successful in achieving this vision then we need employers of all sizes to work with us and invest in the skills of their employees. In return, we have to ensure that employment and skills support we offer to both individuals and employers is more joined-up, accessible and responsive to their needs.
House building firm Redrow say they are looking forward to a more positive outlook as consumer confidence returns and the housing market emerges from a very challenging economic period.
– Karen Jones, HR director for Flintshire-based Redrow Homes
At Redrow we believe training holds the key to maintaining a skilled workforce for years to come. Last year we took on more than 40 new apprentices in Wales and England, taking our total number to 80 plus, along with a number of graduates, undergraduates and sales and technical trainees. In fact, 14% of all our employees have official trainee status and we continue to offer varied vocational training schemes for all staff.
The key to Wales' growth is to ensure that people have the right skills to deliver major projects, according to the Welsh Government.
– Ken Skates AM, Deputy Minister for Skills and Technology
Having the right intelligence on the demand for skills is critical to informing how we work with businesses to support their training needs. It is fundamental to our planning process and in giving the insight as to where industries like construction are going and what their future needs and priorities look like.
Making sure people have the right skills to deliver major construction projects is vital if we are going to create a strong Welsh economy. This alignment with the needs of employers is a central theme of our Policy Statement on Skills, which we'll be launching this week.
Welsh Government investment coupled with the Help to Buy scheme, which is expected to boost demand for homes across Wales, are anticipated to help increase the strength of Wales's construction industry.
But while the research paints a generally positive outlook, the Construction Industry Training Board (CITB) says safeguards must be put in place to ensure that any growth is 'secure and sustained'.
Employment levels in 2018 are still forecast to be below pre-recession levels, so we need to ensure that measures are put in place now to secure sustained growth in the long-term.
We need committed and targeted investment in infrastructure projects in Wales, such as the nuclear power station in Wylfa, as well as innovative measures, such as the Wales Infrastructure Investment Plan (WIIP) and community benefits, which are helping to maximise growth opportunities.
– Wyn Prichard, CITB Wales Director
Our close working with the Welsh Government, employers and training providers to ensure initiatives are developed to meet the skills needs of the existing Welsh construction industry is further helping to develop the pipeline of skills.
Growth in Wales's construction industry is expected to be fuelled by the anticipated start of build work at the Wylfa nuclear power station in Anglesey.
It's thought infrastructure in Wales will be the chief driver of growth.
The private housing sector is set to be the second largest driver of growth in Wales, with key projects including the £1.2bn Coed Darcy development and the £75m regeneration works in Merthyr, Tydfil and Swansea expected to significantly boost employment and output prospects.
Nearly 18,000 new constrution industry jobs are expected to be created across Wales in the next five years.
Research released today by CITB Wales highlights forecast growth of 3.4% annually in the industry between now and 2018.
Cardiff Airport has launched new flight services today following airline Flybe's decision last month to pull its routes.
Newcomers CityJet will offer daily services to Paris and Glasgow and summer routes to Jersey and Edinburgh.
It is welcome news for Cardiff Airport, which is owned by the taxpayer after being bought by the Welsh Government for over £50 million.
Youngsters wanting to set up their own businesses are getting intensive training in Pembrokeshire this weekend from experts.
They're taking part in the first 'Big Ideas Wales Bootcamp' backed by the Welsh Government.
Those taking part had to qualify through auditions held across Wales. The aim is to help young entrepreneurs turn business dreams into reality.
Kevin Ashford reports