Place 3 quarts water in a large saucepan over high heat.
When the water boils, add the potatoes and cook for about 10 minutes.
Strain the potatoes and set aside to cool for about 10 minutes on the counter, then refrigerate until cold.
Put 1 quart water in the saucepan over high heat.
When the water boils, add the green beans and cook for 6 minutes
Remove the beans and refrigerate until cold.
Cut the beans into 1/4 inch pieces. Slice crosswise.
Place in a mixing bowl with the potatoes, eggs, tuna, mayonnaise, carrots, salt, pepper, and paprika.
Fold together gently and chill well.
Serve.
