Perhaps you should try some spelling variations:
"stable salt reactor" » "stable spent reactor", "stable shunt reactor", "stable a reactor", "table salt reactor", "stable small reactor", "stable set reactor"
"stable fast reactor" » "table fast reactor", "stable fault reactor", "enable fast reactor"
"state fast reactor" » "states fast reactor", "suite fast 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 fast reactor") OR ("state fast reactor")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"stable salt reactor\") or (((\"stable fast reactor\") OR (\"state fast reactor\"))))".
• Removing quotes may allow a broader search: (( stable salt reactor ) or ((( stable fast reactor ) OR ( state fast reactor )))).
• Adding a wildcard symbol may retrieve word variants: (("stable salt reactor") or ((("stable fast reactor") OR ("state fast reactor"))))*.