From Admiral Rickover's 'Paper Reactor' memo (1953)[1]:
"An academic reactor or reactor plant almost always has the following basic characteristics:
1. It is simple.
2. It is small.
3. It is cheap.
4. It is light.
5. It can be built very quickly.
6. It is very flexible in purpose (“omnibus reactor”)
7. Very little development is required. It will use mostly “off-the-shelf” components.
8. The reactor is in the study phase. It is not being built now."
"An academic reactor or reactor plant almost always has the following basic characteristics:
1. It is simple. 2. It is small. 3. It is cheap. 4. It is light. 5. It can be built very quickly. 6. It is very flexible in purpose (“omnibus reactor”) 7. Very little development is required. It will use mostly “off-the-shelf” components. 8. The reactor is in the study phase. It is not being built now."
The whole paper is well worth reading, IMHO:
[1] https://whatisnuclear.com/rickover.html