# The Sizewell C (Nuclear Generating Station) Order 2022, Main development site: operational infrastructure and Sizewell B relocation works


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).
The location of the above works is shown on sheet nos 1-5 and 7-8 of the Works Plans.
Work No. 1B
New permanent four arm roundabout at B1122 Abbey Road including one site access point, plus a second temporary site access point using an additional temporary arm.
The location of the above works is shown on sheet nos 1 and 8 of the Works Plans.
Work No. 1C
Works associated with Lovers Lane, to include—
(a) realignment of the junction of the B1122 Abbey Road and Lovers Lane;
(b) realignment of Lovers Lane;
(c) provision of a mammal culvert under Lovers Lane; and
(d) creation of a right turn into Leiston Household Waste Recycling Centre.
The location of the above works is shown on sheet nos 3, 7 and 8 of the Works Plans.
Work No. 1D
Works associated with the relocation of certain Sizewell B power station facilities, to include—
(a) outage store building;
(b) outage laydown area;
(c) training centre;
(d) up to 112 operational car parking spaces and access roads;
(e) up to 576 outage car parking spaces;
(f) visitor centre;
(g) administrative buildings to include workshops, civils store, office accommodation and general store;
(h) storage, canteen and welfare facilities; and
(i) outage car park access roads.
The location of the above works is shown on sheet nos 2, 4 and 5 of the Works Plans.
Work No. 1E
Works associated with the relocation of certain Sizewell B power station facilities, to include—
(a) outage store building;
(b) outage laydown area;
(c) training centre;
(d) up to 579 operational car parking spaces and access roads;
(e) visitor centre;
(f) administrative buildings to include workshops, civils store, office accommodation and general store; and
(g) storage, canteen and welfare facilities.
The location of the above works is shown on sheet nos 2, 4 and 5 of the Works Plans.

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Source: https://www.legislation.gov.uk/uksi/2022/853/schedule/1/part/1/crossheading/main-development-site-operational-infrastructure-and-sizewell-b-relocation-works (the official version)
Page: https://openlegislation.uk/sizewell-c-nuclear-generating-station-order-2022/schedule-1/part-1/crossheading-main-development-site-operational-infrastructure-and-sizewell-b-relocation-works
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.