One way or another, the decision of the European Commission to back the building of a nuclear power plant in Somerset in southwest England, just 150 miles from the Irish coast, closer than Dublin is to Cork, will rekindle debate on the burning question of whether or not Ireland should go nuclear. Despite Government assurances that the new plant will not pose any danger to this country, opposition to the project is already growing among those who fear it will pave the way for more atomic plants across Europe.