The Sizewell C (Nuclear Generating Station) Order 2022

Work No. 1A

An electricity generating station with a net electrical output of approximately 3,340MW power generated by two nuclear reactor units, to include—

(a) buildings, structures and plant within the ’nuclear islands’ for Units 1 and 2, including—

(i) two reactor buildings;

(ii) two fuel buildings;

(iii) two fuel building halls;

(iv) two boron storage buildings;

(v) eight safeguard buildings;

(vi) two nuclear auxiliary buildings;

(vii) two nuclear auxiliary building stacks;

(viii) two access towers;

(ix) radioactive waste storage building;

(x) radioactive waste process building;

(xi) radioactive waste treatment building;

(xii) hot laundry building;

(xiii) hot workshop, hot warehouse, facilities for decontamination;

(xiv) effluent tanks and refuelling water tanks;

(xv) four emergency diesel generator buildings and twelve associated stacks;

(xvi) two ’type 1’ cooling water discharge weir buildings; and

(xvii) two ’type 2’ cooling water discharge weir buildings;

(b) buildings, structures and plant within the ’conventional islands’ for Units 1 and 2, including—

(i) two turbine halls;

(ii) two sky bridges;

(iii) two conventional island electrical buildings;

(iv) two gas insulated switchgear buildings;

(v) two main transformer platforms;

(vi) four unit transformer platforms;

(vii) two auxiliary transformer platforms; and

(viii) six monopoles;

(c) operational service centre;

(d) four electricity transmission towers / pylons inside the powers station’s security fence and associated transmission infrastructure;

(e) buildings, structures and plant within the ’cooling water pumphouse and associated buildings’ for Units 1 and 2, including—

(i) two cooling water pumphouses;

(ii) two forebays;

(iii) two outfall pond buildings;

(iv) two filtering debris recovery pits; and

(v) two fire-fighting water distribution buildings;

(f) intermediate level waste store;

(g) interim spent fuel store;

(h) buildings, structures and plant within the ’ancillary structures’, including (but not limited to)—

(i) main access control building;

(ii) auxiliary administration building;

(iii) secondary access control building;

(iv) emergency response centre;

(v) emergency response energy centre;

(vi) meteorological station;

(vii) demineralisation station;

(viii) valve room for the demineralisation station;

(ix) auxiliary boilers;

(x) hydrogen storage;

(xi) oxygen storage;

(xii) hydrazine storage;

(xiii) chlorination plant;

(xiv) service ventilation building;

(xv) raw water & potable water storage/supply building;

(xvi) degassed water storage tanks;

(xvii) cooling water discharge shaft;

(xviii) chemical products storage;

(xix) garage for handling materials;

(xx) oil & grease storage;

(xxi) contaminated tools store;

(xxii) warehouse;

(xxiii) sewage treatment plant;

(xxiv) conventional island water tanks;

(xxv) nuclear island water tank;

(xxvi) conventional waste storage;

(xxvii) transit area for very low and low level waste;

(xxviii) service access buildings;

(xxix) battery load banks;

(xxx) interim spent fuel store equipment storage building; and

(xxxi) emergency equipment store.

(i) 132kV substation and associated compound;

(j) off-site delivery check point, associated buildings, structures and plant;

(k) permanent vehicular and pedestrian bridge over Sizewell Marshes SSSI, preceded by a temporary crossing.

(l) permanent beach landing facility;

(m) soft coastal defence feature;

(n) permanent hard coastal defence feature, preceded by a temporary hard coastal defence feature;

(o) buildings, structures and plant, including a new National Grid substation building, plant, equipment and apparatus, alterations to the existing National Grid substation building, plant, equipment and apparatus, and associated diversion of transmission infrastructure;

(p) one electricity transmission tower /pylon outside the power station’s security fence, and associated transmission infrastructure including overhead line conductors;

(q) 770 permanent operational parking spaces and 600 outage parking spaces;

(r) removal of an existing transmission tower / pylon and associated transmission infrastructure;

(s) realignment of Sizewell Drain and associated works;

(t) perimeter below-ground cut off-wall, including associated dewatering of the contained area;

(u) drainage outfall tunnels comprising—

(i) combined drainage outfall tunnel (continuing as Work No. 2K); and

(ii) temporary marine outfall;

(v) power station main access road;

(w) 1,000 temporary car parking spaces and 75 temporary HGV parking spaces;

(x) temporary freight management facility, 80 HGV parking spaces and associated infrastructure;

(y) temporary park and ride facility, 600 associated car parking spaces, 20 bus spaces, a terminal area and associated infrastructure;

(z) temporary water resource storage area;

(aa) temporary marine bulk import facility;

(bb) improvement works to Kenton Hills Car Park to include provision of up to 15 additional parking spaces;

(cc) flood mitigation area and associated habitat;

(dd) serviced pitches for up to 400 caravans and 400 temporary car parking spaces;

(ee) bat barn;

(ff) temporary junction onto King George’s Avenue;

(gg) temporary junction onto Valley Road

(hh) temporary junction onto Lovers Lane;

(ii) temporary desalination plant and associated infrastructure;

(jj) temporary desalination plant outfall tunnel (continuing as Work No. 2O); and

(kk) temporary desalination plant intake tunnel (continuing as Work No. 2M).