Sources said the Congress high command has also nominated him to the Standing Committee on Defence.
Kumar, a Rajya Sabha member, was a member of the PAC earlier too.
They said Kumar today met Prime Minister Manmohan Singh in his Parliament House office where they discussed the ongoing Monsoon session.
CBI director Ranjit Sinha had filed an affidavit before the Supreme Court recently, confirming that the status report had been "shared" with Kumar and an officer each from the Coal Ministry and Prime Minister's Office "as desired by them".