This video says about itself:
Inside the Svalbard Seed Vault
4 May 2016
A rare look inside the Svalbard Global Seed Vault which is closed ~350 days a year
Translated from Dutch NOS TV today:
The Norwegian government is investing more than 10 million euros in a renovation of the World Seed Bank on Spitsbergen island. About 900,000 seeds are stored in the bunker, so that the DNA is retained in the event of a major natural disaster or nuclear disaster. The seeds are important for the food supply chain on earth.
The world seed bank is 120 meters deep in a mountain near Longyearbyen town, where the temperature is brought to -18 degrees Celsius.
The money includes a separate room for electrical appliances that generate heat, so that the bunker itself remains as cold as possible. There will also be a new watertight entrance. Late 2016 showed that the current entrance was leaking, when the permafrost melted unexpectedly. …
The seeds from the database were used for the first time three years ago. During the civil war in Syria, thousands of seeds were stored and secured from that country, which were later brought back when the situation became more peaceful.