Perhaps you should try some spelling variations:
"stable shunt reactors" » "stable secant reactors", "stable should reactors", "stable set reactors", "stable shunt reactions", "stable shunt factors", "stable shunt actors"
"stable salt reactor" » "stable fast reactor", "stable spent reactor", "stable shunt reactor", "table salt reactor", "stable small reactor", "stable set reactor"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("stable salt reactor") OR ("stable shunt reactors")).
• Removing quotes may allow a broader search: (( stable salt reactor ) or ( stable shunt reactors )).
• Adding a wildcard symbol may retrieve word variants: (("stable salt reactor") or ("stable shunt reactors"))*.