In 2010 it was the turn recycling nuclear submarine K-431 Project 675, which occurred in 1985, the nuclear tragedy. According to the schedule, the work must be performed on the 30th shipyard Ministry of Defense, located in the Primorsky Krai. But will it be scrapped submarines is difficult to say. Factory workers have refused to carry out the "cut" subs, referring to radiation hazard both for themselves and for the adjacent village of the Danube.
To cut or not to cut
In a collective letter, which the workers of the 30th shipyard sent to news agency "Interfax", said that the Far plant "Star" is responsible for recycling K-431, wants to rent in the seaside businesses floating dock, and the very nuclear submarine is planned to be disposed of with not unloaded from the reactor fuel. According to professionals in the 30th shipyard radiation environment inside and outside the reactor compartment K-431 after almost 25 years after the tragedy is still unsafe.
Open letter was the beginning of the dispute between the members of the 30th running of the plant and "Stars." Namely, as the "Interfax", experts at the factory "Star" announced the complete safety of the work on submarines for the employees and for the inhabitants of the Danube. According to the general director of "Stars" Andrew Rassomahin, dismantlement of nuclear submarines will be done "under the traditional scheme, non-hazardous for employees." "Utilization of emergency submarine with serial number 175 — one of the principal tasks of this year, set by the Government of the Russian Federation", — added Rassomahin.
According to the head of the disposal of "Stars," Alexander Kisileva, feature "cutting" K-431 will be in the fact that in the reactor compartment of work will not be undertaken. "On this day, the boat is sealed, reactor compartment tightly isolated from the environment and have no impact will be. Specialists predict that the deterioration of the radiation situation in the area of work is not going to happen, "- explained to Kiselev.
What ultimately had in mind control "Stars" is unclear. The traditional scheme of submarine decommissioning involves unloading of the reactor compartment waste and irradiated nuclear fuel, removal of non-irradiated hardware, and then cutting the reactor and 2-adjacent compartments. After which the acquired unit is sealed, covered with anti-corrosion materials, and kept going. In other words, the rejection of self recesses of fuel from the reactor compartment already provides a significant departure from the traditional scheme of recycling.
Is the K-431 at the present time a significant danger, it is difficult to judge. After the tragedy at the Premier League in 1985 estimate of the number of remaining fuel in the reactor compartment was performed. Meanwhile, the submarine itself is unable to independently stay afloat, and the state of the housing Go to-431 tanks and supporting it on the water, very bad. Because, according to Kisileva, "the sooner will utilization, the safer for our region. "
According to the management of the plant "Star"The decision on disposal of K-431 on the 30th shipyard associated with virtually full load capacity of dock itself" Stars. "In addition, the transportation of nuclear submarines in the half-rotten" Star "may represent a risk for the environment. At the same time, according to management of "Stars," recycling on the 30th plant is more comfortable option from the standpoint of transportation of the remains of the K-431 to the repository "DalRAO" in the Bay of Rogue.
So Makar, the parties involved in the dispute were in a very difficult situation. On the one hand, the "cut" of radioactive submarines and indeed may represent a severe threat to the lives of workers and the population of the Danube. On the other, the upcoming respite utilization submarine lying afloat, could lead to even more severe consequences, especially if you imagine that a quantity of irradiated nuclear fuel in the reactor compartment of the tragedy still remains.
The K-431 was built in 1965 in Komsomolsk-on-Amur, and was adopted by the USSR under the symbol K-31. In the K-431 submarine was renamed in 1978. In total, during his own life, it was 181 for a thousand miles 21.4 thousand running hours. In 1985, K-431 was delivered to the Navy joke factory in the village of Shkotovo-22 in the Bay Chazhma. On submarines planned to make reloading of the reactor core.
August 10, 1985, work began on the unloading of spent nuclear fuel and reactor refueling. This work, in itself for itself represents a severe threat was made in violation of the rules — namely, the development was broken lifting the lid of the reactor. Presumably, when the cover is lifted last caught one of the fuel cell reactor, with the result that there was a double explosion.
The first explosion of the reactor lid was thrown and knocked on the hull of K-431. With all of this in the course of an uncontrolled nuclear reaction was thrown out huge amounts of energy, which led to a sharp increase in the temperature in the reactor and the reactor compartment. Water located in the reactor turned into vapor and quench the reaction. But a little later in the reactor steam condensed into water and the chain reaction resumed. There was a second explosion, as a result of which the reactor lid was thrown again and again knocked on the submarine's hull.
Two explosions and blows the lid of the reactor split Reactor compartment opened causing leakage of radiation to the environment. Then the team of sailors, engaged in the aftermath of the tragedy, the irradiated water was drained from the reactor compartment into the sea. As a result, the disaster radioactive release crossed the peninsula and left the Danube to the sea on the coast of Ussuri Bay. More large-scale spread of radiation prevented calm weather, fog and a little rain. According to some reports, the bottom water in the bay Chazhma to date represent a radiation hazard.
K-431, the injured after the explosion, has been recognized to be inapplicable for the repair and the upcoming operation. The boat was welded shut, and the emergency bay concreted. After that canned submarine was delivered to the storage in Pavlovsk, where it was later created repository "Zapyataev" nuclear submarines of the Pacific Fleet of the USSR. Together with the K-431 in turn was placed on the disposal of the K-42, at the time of the disaster is located nearby.
As a result, the disaster in the Bay of Chazhma killed 10 people. Another was fixed at ten, acute radiation sickness and 39 — radiation reaction. In total of 239 people suffered radiation.