Spent fuel storage

Spent fuel generated from NPPs is stored in the spent fuel storage facility in each unit. The storage capacity for spent fuel has been expanded as a consequence of the delayed construction schedule of the away-from-reactor (AFR) interim storage in accordance with the conclusions of the 249th and the 253rd meetings of the AEC. Taking into consideration the sufficiency of spent fuel storage capacity beyond 2016, the national policy for spent fuel management, including the construction of the interim storage facility for spent fuel, shall be decided in a timely manner through national con­sensus by public consultation among the stakeholders.

To expand the spent fuel storage capacity, the utility company, Korea Hydro & Nuclear Power Co. (KHNP), is installing high density storage

Table 21.3 Spent fuel storage (as of September 2011)

NPP Site

Type of storage

Capacity* (mtu)

Inventory (mtu)

Kori

Wet

2,472

1,869

Yonggwang

Wet

2,686

1,949

Ulchin

Wet

2,328

1,591

Wolsong

Wet and dry

9,441

6,431

Total

16,927

11,839

* Except emergency core.

racks, transferring spent fuel between units and building dry storage. High density storage racks have been installed in Kori 3 and 4, Ulchin 1, 2, 3 and 4, and Yonggwang 3 and 4. Dry storage facilities have been installed on the Wolsong site for Wolsong 1, 2, 3 and 4 units which are CANDU reactors. By adding 100 canisters in 2006, 300 canisters are installed on site. In addi­tion to the canisters, seven modules of MACSTOR (Modular Air-Cooled STORage)-400 with 3,175 mtu total capacity have been installed and in operation since May 2010.

The spent fuel storage pool of the HANARO reactor is a heavy concrete structure, lined with stainless steel plate. The vault comprises three storage lattices. The vault has enough capacity for temporarily storing new fuel as well as spent fuel to be generated during normal operation of HANARO for 20 years.

The Korean government has striven to secure a spent fuel management site since the early 1980s. However, the national policy for spent fuel man­agement including construction of the centralized spent fuel interim — storage facility was to be decided in view of domestic and international technology developments later on. The national policy for spent fuel man­agement will be decided later in consideration of domestic and interna­tional technology developments. Reprocessing activities have not been conducted in Korea.

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