WASHINGTON — Under the proposed six-month deal that six major powers are negotiating with Iran in Geneva, Iran would eliminate its current stock of uranium enriched to 20 percent by diluting it or turning it into fuel rods or oxide powder, forms that are unusable for weapons, senior Western officials said Friday. Iran would be allowed to continue to enrich uranium at much lower levels, to 3.5 percent, the officials said, but would also agree to cap its current stockpile of such uranium, by eliminating, diluting or transforming into fuel as much 3.5 percent uranium as it produces over the six months. The officials spoke about the deal on the condition of anonymity because the negotiations had not been completed. The rationale for such a deal, the officials said, is to satisfy Iran’s refusal to suspend all enrichment — a concession that its negotiators could not sell domestically, even […]