The operation of the plant is, at its most basic, quite simple. Coal is burnt in large ovens to produce coke (sent to smelters at various steel works), the gas is washed free of contaminants (processed to make a host of coal-tar related products) and then piped to Newport for use. Or that's the way it was: the plant has been long closed - a casualty of the closure of the South Wales coal field (and I still bear a strong grudge against Thatcher for her part in this).
Students were employed in the summer months to cover shift holidays and it was a much sort after job as the wages were very good for the area (a 60 hour week could bring in a magnificent £19!). There was also considerable kudos attached to working in such an industrial environment - it was seen as a man's job and a definate step up from lazing around as a labourer with the erstwhile Bedwas and Machen Urban District Council (I know as I'd served my time there as well!). About ten of us would be taken on and allocated across the four separate shifts. I had a regular place on the ovens themselves and this suited me just fine. There was always something going on and the regular workers were a great bunch to spend time with. In retrospect, I learnt quite a bit about life from them, particularly in the area of politics. To a great extent, the political discussions (and they got quite heated at times) we had helped me shape my own views, the core of which remain largely unchanged from those days.
What about the work? No concessions were made to the fact that we were students and, apart from being given a pair of wooden clogs if you were working on top of the ovens, no protective clothing was issued. These were the days before Health and Safety! There was no training: you were just told to whom you had to report and they showed you what had to be done. Because we were all classed as 'brainy students' we were expected to pick things up quickly, otherwise hoots of derision came our way and, if we did something particularly daft, word quickly spread from shift to shift. But there was never anything malacious behind these comments: if anything there was a collective pride in the fact that some of their own were going to university and 'getting on'.
Happy days! And that's why I love ovens.