Krushelnitsky, who won bronze in Pyeongchang with his wife in mixed doubles curling, has denied taking banned substances.
In his first comments since the positive test emerged this week, Krushelnitckii said he had never taken any banned substances and was categorically against doping.
The first athletes from Russian Federation to win an Olympic medal in mixed-doubles curling have been stripped of their bronze medal and disqualified from the Winter Games after one of them tested positive for doping.
On Wednesday, the Court of Arbitration for Sport said in a statement the duo's results have been disqualified, and they have agreed to return their medals.
South Korean President Moon jae-in has hailed the participation of Russian athletes at the Winter Olympic Games despite criticism of the decision to allow them to compete amid the country's doping scandal.
The Russian Olympic team cited previous test results which suggest that the athlete had not been using the drug on a long-term basis which is needed for the drug to be effective.
Krushelnitsky waived his right to a CAS hearing, and the ruling was based on written evidence.
Since Krushelnitsky and Bryzgalova have been stripped of their medals, the number of medals won by the Olympic Athletes from Russian Federation has dropped to 12 (four silvers and eight bronzes).
A statement in Krushelnitsky's name published by state news agency Tass said he accepted the substance had been found in his sample but that he had not doped intentionally.
At the request of the athlete, the International Olympic Committee, and the World Curling Federation - the case will be made on the basis of written submissions only.
"I am categorically opposed to doping and have always strived to follow the conformities of all anti-doping rules with maximum attention".
Like other OAR athletes, Krushelnitsky had to prove he was he was clean as part of the IOC's vetting process for Russian athletes to be invited to compete in Pyeongchang.