Society News Archive

24 August 2015
Deadline Extended Until 19 November 2015 on LNT Model

The U.S. Nuclear Regulatory Commission (NRC) is considering petitions to amend its radiation protection regulations that are based on the linear no-threshold (LNT) model.

Specifically, three petitioners (Carol Marcus, MD, PhD; Mark L. Miller, CHP; and Mohan Doss, PhD) have requested that "NRC greatly simplify and change 10 CFR 20 to take into account the 'vast literature demonstrating no effects or protective effects at relatively low doses of radiation.'"

The recommended changes include:

  • Keeping worker dose limits at present levels, with allowance of up to 100 mSv y-1 from chronic doses.
  • Removing the as low as reasonably achievable (ALARA) approach from the regulations, which is irrelevant if low doses are indeed hermetic.
  • Setting public dose limits to be the same as worker dose limits.

The comment period on the petitions has been extended until 19 November 2015 and 161 comments have been received.

The changes may be viewed and comments submitted on the website using Docket ID NRC-2015-0057.