To ask the Secretary of State for the Environment what proportion of the capacity of the proposed Nirex deep repository for radioactive waste would be required to dispose of (a) thermal oxide reprocessing plant operational wastes if British Nuclear Fuels plc is not allowed to satisfy foreign waste return clauses using substitution for equivalent waste, (b) THORP operational wastes if substitution is allowed, (c) THORP decommissioning wastes and (d) wastes arising from stage 3 decommissioning of existing nuclear facilities.

The capacity of the proposed Nirex deep disposal facility for low and intermediate-level radioactive waste has yet to be established.