Ahmad, Ali, Frank von Hippel, Alexander Glaser, and Zia Mian

Abstract
In November 2013, Iran and the P5+1 group of countries (China, France, Germany, Russia, the United Kingdom, and the United States) agreed on a six-month Joint Plan of Action to enable negotiations on a final settlement to contain the proliferation risks from Iran’s nuclear program.
This interim agreement freezes Iran’s enrichment capacity, thereby preventing a further shortening of the time Iran would require to produce weapons quantities of highly enriched uranium (HEU) if it wished.1 This enrichment capacity has expanded greatly over the years since it first came to international attention in 2002.
Iran and the P5+1 also have agreed on the need to constrain Iran’s option to produce plutonium for weapons using the reactor that is under construction near the city of Arak and that will be under International Atomic Energy Agency (IAEA) safeguards.
Under the Joint Plan of Action, Iran has agreed to freeze the Arak reactor project for six months.2 It also has committed not to separate plutonium from spent nuclear fuel or construct a facility capable of doing so. These are important interim commitments.
According to Ali Akbar Salehi, the head of the Atomic Energy Organization of Iran, the Arak reactor is intended for radioisotope production and testing of nuclear fuel and materials. In response to the P5+1 proposal that Iran scrap the Arak reactor project, Salehi stated that “we see no point stopping the work on this reactor.” He has acknowledged, however, the international community’s concerns about the Arak reactor and offered the possibility of design changes “in order to produce less plutonium in this reactor and in this way allay the worries and mitigate the concerns.”3
This article proposes technical steps that would provide assurance that Iran could not quickly make sufficient plutonium for a nuclear weapon with the Arak reactor while at least maintaining the reactor’s performance in peaceful applications.
The solution proposed here involves changing the fueling and operating power of the Arak reactor to make it less of a proliferation concern. The case of Algeria’s Es-Salam research reactor provides a useful precedent.
Read the article online here.