MOSCOW, JULY 20 -- The government of the Russian republic has drawn up plans for the dismantling of state controls over the economy and the freeing of prices that go far beyond the cautious program of economic reform envisaged by the Soviet authorities.

The unofficial Soviet news agency Interfax said that the Russian plan, described as a "500-day confidence mandate," had been drawn up by close associates of Russian President Boris Yeltsin. The report provides the first detailed insight into how the newly elected Russian leader plans to revive the economy of the largest and most powerful Soviet republic.

Disclosure of the Russian economic plan came as Soviet President Mikhail Gorbachev gathered the leaders of all 15 Soviet republics, including Yeltsin, to discuss proposals for a new union treaty. Many republics are now insisting that the central government in Moscow give up many of its political and economic powers, reshaping the Soviet Union into a confederation of sovereign states.

The Russian plan is clearly designed as an alternative to Soviet Prime Minister Nikolai Ryzhkov's proposals for a gradual transition to a "regulated market economy" which triggered a wave of panic buying when they were announced in late May. The Ryzhkov plan envisaged a doubling in the prices of many basic items next year, but maintained government controls over the economy.

Interfax said the first stage of the four-stage Russian plan calls for legalizing private property and taking inventory of state assets. During the second stage, 100 to 250 days from the start of the plan, government subsidies would be abolished and unfinished construction projects would be sold to any potential buyer, including foreigners.

One purpose of the privatization program would be to soak up the excess money in the economy that has caused chronic shortages as consumers sweep through stores spending their rubles on anything they can find. According to Interfax, the Russian government proposes removing 200 billion rubles -- roughly half the "hot rubles" now in circulation -- by the sale of state assets.

The third stage, between 250 to 400 days, envisages the lifting of government controls over prices. The plan predicts that this would lead to a slump in industrial production and the closing of the least efficient factories. During the final stage, measures would be taken to stabilize the economy.

The Russian plan bears some resemblance to the shock therapy introduced in neighboring Poland by the new Solidarity government which succeeded in restoring balance to the economy at the cost of a sharp recession. While privately praising the "Polish variant," Soviet government economists warn that any attempt to introduce similar measures here could result in a social explosion.

As one of the few Soviet politicians with strong public backing, Yeltsin is in a better position to risk introducing radical economic reforms than the unpopular central government. But even Yeltsin will have a hard time convincing his supporters to accept sharply higher prices and large-scale unemployment in return for the long-term advantages of the free market.

The Russian plan envisages continued government direction over power facilities, railways, pipelines, communications and defense industries. In other areas, it provides for large-scale privatization through buyout, foreign investment, stock issues and leasing.

A political battle appears to be shaping up between Yeltsin and Gorbachev over which areas of the economy should be transferred to the republics' control. Soviet authorities are resisting proposals for the establishment of separate banks and currencies in the republics and are also likely to oppose Russian demands for control over the republic's natural resources.

Addressing the Council of the Federation today, Gorbachev said that the 15 republics would have to surrender some of their authority to the central government in Moscow under the new union treaty. He also said that declarations of sovereignty by the republics should not disrupt a single, all-union market.

{Potentially far-reaching changes in national-security policy in the Russian republic were summarized today by a key Yeltsin aide. Oleg G. Rumjancev, secretary of the Yeltsin-led commission that is drafting a Russian constitution, said in Washington that the republic this month established a Ministry of National Security that "will control army and KGB activities on Russian territory." The head of this ministry has not yet been chosen, he said.

{Rumjancev told Washington Post editors that issues affecting production and stationing of nuclear weapons on Russian territory "will be one of the most important topics in negotiations" between the new ministry and Soviet authorities. He said there will be political pressure for Russia to declare itself a nuclear-free zone, like the Ukraine, which embraced that goal in announcing its sovereignty this week.}