From the Wikipedia page 
Pechengsky District (Russian: Пе́ченгский райо́н; Finnish: Petsamo; Norwegian: Peisen; Northern Sami: Beahcán; Skolt Sami: Peäccam) is an administrative district (raion), one of the six in Murmansk Oblast, Russia. As a municipal division, it is incorporated as Pechengsky Municipal District. It is located in the northwest of the oblast on the coast of the Barents Sea (by the Rybachy Peninsula, which is a part of the district) and borders with Finland in the south and southwest and with Norway in the west, northwest, and north. The area of the district is 8,662.22 square kilometers (3,344.50 sq mi). Its administrative center is the urban locality (an urban-type settlement) of Nikel.
When Polyarny District was abolished on July 9, 1960, a part of its territory was transferred to Pechengsky District.
On December 26, 1962, when the Presidium of the Supreme Soviet of the RSFSR decreed to re-organize the Soviets of People's Deputies and the executive committees of the krais, oblasts, and districts into the industrial and agricultural soviets, Murmansk Oblast was not affected and kept one unified Oblast Soviet and the executive committee. Nevertheless, on February 1, 1963, the Decree by the Presidium of the Supreme Soviet of the RSFSR established the new structure of the districts of Murmansk Oblast, which classified Pechengsky District as rural. However, this classification only lasted for less than two years. The November 21, 1964 Decree by the Presidium of the Supreme Soviet of the RSFSR restored the unified Soviets of People's Deputies and the executive committees of the krais and oblasts where the division into the urban and rural districts was introduced in 1962, and the districts of Murmansk Oblast were re-categorized as regular districts again by the January 12, 1965 Presidium of the Supreme Soviet of the RSFSR Decree,