Russia Says Leak of Secret Nuclear Weapon Design Was an Accident By ANDREW E. KRAMERNOV. 12, 2015 Continue reading the main story Share This Page Email Save MOSCOW — The Kremlin’s chief spokesman has confirmed that a report broadcast on Russian television this week revealed the design of a secret nuclear weapon delivery system: a drone submarine that could attack coastlines. Russian officials said the revelation of the submarine, which has not yet been produced, was accidental. But it came to light in the Russian news media in a way that suggested that the Kremlin wanted the West to know. Such a submarine design had been conceived decades ago, independent Russian military commentators said, but it had not been revealed until now. It would function as a long-range torpedo and would avoid missile defenses by traveling under the ocean’s surface. News of the design was reported on state and NTV television on Monday as though merely in passing, during a meeting between President Vladimir V. Putin and military industry officials and generals. The broadcast began with a public portion. Continue reading the main story Related Coverage A Sukhoi Superjet at Sheremetyevo, an international airport northwest of Moscow. At Aeroflot, It’s Patriotism Over Profits as Russia Pressures IndustryNOV. 12, 2015 Russian soldiers with their plane, a Sukhoi Su-34 strike fighter, which NATO calls a Fullback, this month in Latakia, Syria. Russian Military Uses Syria as Proving Ground, and West Takes NoticeOCT. 14, 2015 At one point, the camera zoomed in on something one of the military officers was reading: a binder opened to a page showing the weapon design. “Maritime Multifunctional System Status-6,” a headline said, in block Cyrillic letters, above an illustration showing the submarine and a text in easily decipherable large letters explaining the weapon’s effects. The submarine would “defeat important economic objects of an enemy in coastal zones, bringing guaranteed and unacceptable losses on the country’s territory by forming a wide area of radioactive contamination incompatible with conducting military, economic or any other activities there for a long period of time,” it said. On Wednesday, Mr. Putin’s spokesman, Dmitri S. Peskov, told Russian news agencies that the cameras had accidentally filmed a secret document. “Indeed, some secret data fell into the field of view of these cameras,” Mr. Peskov was quoted as saying by the news agency Interfax. Because the document was a genuine secret, he said, the video was subsequently removed from the channels’ websites. “We hope such a thing will never be repeated,” he said. Yet commentators on the Echo of Moscow radio station suggested Thursday that the television broadcast was hardly an accident, given the tight control over the state news media here. Rather, the commentators said, the broadcast was the latest instance of nuclear saber-rattling from Russia at a time of rising tensions with the West. Instead of a formal announcement, in this interpretation, the revelation of the submarine was couched as accidental to amplify its intimidating effects — a military officer had been casually perusing the design while in a meeting with Mr. Putin. At the height of the crisis in Ukraine last year, a Kremlin-linked commentator, Dmitri Kiselyov, spoke of Russia’s ability to reduce the United States to “nuclear ash.” Later, a Russian ambassador to Denmark warned the country faced nuclear destruction for having backed the United States’ missile defense plans. RBK, a Russian newspaper, cited an unidentified weapons expert as saying that Soviet designers first conceived of the pilotless submarine in the 1960s as a vehicle for transporting a large nuclear device into shallow coastal waters to create a radioactive tsunami. The submarine, the newspaper said, had been called “Sakharov’s Torpedo” after the Soviet physicist Andrei Sakharov, but had never been built. Meduza, a Latvia-based news portal covering Russian affairs, cited blogs of Russian military history enthusiasts asserting that the design resurfaced in the 1980s, under the code name “Skif,” but that it was again shelved. Dusted off today, the design is apparently something Mr. Putin is considering, based on the sequence of the leak and Mr. Peskov’s confirmation. Mr. Putin has sharply objected to the United States’ missile defense plans that American officials say target states such as Iran. The Russians say the plans could undermine Moscow’s second-strike capability, disrupting the nuclear balance between Russia and the United States. Correction: November 12, 2015 An earlier version of this article misidentified the country in which the news portal Meduza is based. It is Latvia, not Lithuania.