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Secret

21 Feb. 79 05363

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Central Committee of the CPSU

USSR COMMITTEE OF STATE SECURITY [KGB]
February 21, 1979 No. 346-A
Moscow

Construction Flaws at the Chernobyl Nuclear Power Plant [AES]

According to data in the possession of the KGB of the USSR, design deviations and violations of construction and assembly technology are occurring at various places in the construction of the second generating unit of the Chernobyl AES, and these could lead to mishaps and accidents.

The structural pillars of the generator room were erected with a deviation of up to 100 mm from the reference axes, and horizontal connections between the pillars are absent in places. Wall panels have been installed with a deviation of up to 150 mm from the axes. The placement of roof plates does not conform to the designer's specifications. Crane tracks and stopways have vertical drops of up to 100 mm and in places a slope of up to 8 degree.

Deputy head of the Construction Directorate, Comrade V. T. Gora, gave instructions for backfilling the foundation in many places where vertical waterproofing was damaged. Similar violations were permitted in other sections with the knowledge of Comrade V. T. Gora and the head of the construction group, Comrade IU. L. Matveev. Damage to the waterproofing can lead to ground water seepage into the station and radioactive contamination of the environment.

The leadership of the Directorate is not devoting proper attention to the foundation, on which the quality of the construction largely depends. The cement plant operates erratically, and its output is of poor quality. Interruptions were permitted during the pouring of especially heavy concrete causing gaps and layering in the foundation. Access roads to the Chernobyl AES are in urgent need of repair.

Construction of the third high-voltage transmission line is behind schedule, which could limit the capacity utilization of the second unit.

As a result of inadequate monitoring of the condition of safety equipment, in the first three quarters of 1978, 170 individuals suffered work-related injuries, with the loss of work time totalling 3,366 worker-days.

The KGB of Ukraine has informed the CPSU Central Committee of these violations. This is for your information.

Chairman of the Committee [KGB]
[signed]IU. Andropov

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