Control rod blade extension for a nordic nuclear reactor

An apparatus for connecting a control rod blade (CRB) to a control rod drive (CRD) in a Nordic nuclear reactor pressure vessel (RPV), the CRB extending in an axial direction, the CRB including a neutron absorber section, the CRB shaped and sized to fit between a plurality of fuel bundles in the RPV, the CRD configured for linearly moving the CRB in the axial direction, the apparatus comprising:

• an adapter having a single-piece construction, wherein,
• the single-piece adapter includes a top axial end shaped to directly mate with a receptor in a bottom terminal edge of a single-piece lower fin configured to connect to the CRB directly below the neutron absorber section,
• the single-piece adapter includes a bottom axial end with a fastener that removably connects directly to the CRD,
• the single-piece adapter has an axial length spanning an entire distance between the receptor in the bottom terminal edge of the receptor and at least the top of the CRD, and
• the single-piece adapter is configured to connect the single-piece lower fin and the CRD via only the single-piece adapter.