Passive structures

I would like to kindly ask you for help. My task was to rewrite the sentences below using a noun formed from the underlined verb. Could you please take a look at these rewritten sentences and say if they are grammatically correct?

Here is an example sentence:
They will only confirm a place on the course upon full payment.
= Confirmation of a place on the course will only be issued upon full payment.

These are sentences I had to rewrite:
1. They won't publish these scientific papers until next year.
2. They have just announed big job losses on the local news.
3. They are considering the planning application for a new sports centre.
4. They will recommend the immediate clcosure of the hospital.
5. They are to investigate the case in more depth.
6. They didn't explain how much the project would cost.

These are sentences I rewrote:
1. Publication of these scientific papers won't be scheduled until next year.
2. Announcement of big job losses has just been issued on the local news.
3. Consideration of the planning application for a new sports centre is being taken into account.
4. Recommendation of the immediate closure of the hospital will be made.
5. Investigation of the case is to be conducted in more depth.
6. Explanation of how much the project would cost wasn't given.