When assistant coach Ulf Samuelsson begins working with the Rangers at training camp, the veteran of 16 NHL seasons will impart two fundamental principles to his defensemen:

“No one screening the goaltender and no getting rebounds,” is how the one-time Blueshirt described his “ideal defensive environment” Wednesday after the third day of the club’s prospect camp.

Samuelsson, who spent the last two seasons as head coach of Modo Hockey in Sweden after four years as an assistant in Phoenix under first Wayne Gretzky and then Dave Tippett, will join former Winnipeg head coach Scott Arniel, and perhaps another aide as well, on Alain Vigneault’s staff.

“I’m not at all where I want to be on tactical and knowledge of the Rangers, but I have my computer loaded and it’s going to be a busy summer,” said Samuelsson, who played nearly four seasons for the Blueshirts in the late-’90s. “I think there’s great potential here and can be a very successful few years for me here, looking at the roster.”

It is incumbent on the Rangers to keep Ryan McDonagh on the roster in order to fulfill the team’s potential. The 24-year-old first-pair defenseman appears on his way to restricted free agency and will thereby become eligible for an offer sheet when the market opens at noon Friday.

“There’s nothing new to report,” Ben Hankinson, McDonagh’s agent, told The Post via email. “We met at the draft but there’s still some work to be done before a deal is made.”

McDonagh is likely to sign a deal worth between $4.5 and $5 million for anywhere from three to five years, with the price escalating as does the term. If the defenseman goes to arbitration,— the player can file by July 10; if he does not, the club can file the following day — he would be liable for a two-year contract.