Appendix CRF - Part 3 - Northamptonshire County Council

HPA (NRPB) The Health Protection Agency (HPA) is an independent body that protects the
health and well-being of the population. The HPA includes the ex-National Radiological
Protection Board (NRPB).
HSE. Britain's Health and Safety Commission (HSC) and the Health and Safety Executive (HSE)
are responsible for the regulation of almost all the risks to health and safety arising from work
activity in Britain.
hydraulic conductivity, K. See conductivity, hydraulic.
hydraulic gradient. See gradient, hydraulic.
hydraulic transmissivity. See transmissivity, hydraulic.
inadvertent human intrusion. Accidental intrusion into a disposal facility without prior
knowledge of the presence of the facility or accidental intrusion, without prior knowledge, into an
area adjacent to the facility in such a way that it degrades the environmental safety performance
of the facility.
immobilization. Conversion of waste into a waste form by solidification, embedding or
encapsulation. The aim is to reduce the potential for migration or dispersion of radionuclides
during handling, transport, storage and/or disposal. See also conditioning.
inert waste. Material which does not undergo any significant physical, chemical or biological
transformations; does not dissolve, burn or otherwise physically or chemically react, biodegrade
or adversely affect other matter with which it comes into contact in a way likely to give rise to
environmental pollution or harm to human health; and whose total leachability and pollutant
content and the ecotoxicity of its leachate are insignificant and in particular do not endanger the
quality of any surface water or groundwater. This is defined by UK waste legislation for non
radioactive wastes.
in situ disposal. See disposal, on-site.
infiltration. The downward entry of water through the ground surface into soil or rock.
institutional control. See control, institutional.
intervention. Any action intended to reduce or avert exposure or the likelihood of exposure to
sources which are not part of a controlled practice or which are out of control as a consequence
of an accident.
leach rate. The rate of dissolution or erosion of material or the release by diffusion from a solid,
this is hence a measure of how rapidly radionuclides may be released from that material. The
term usually refers to the durability of a solid waste form but also describes the removal of sorbed
material from the surface of a solid or porous bed.
leach test. A test conducted to determine the leach rate of a waste form. The test results may be
used for judging and comparing different types of waste forms, or may serve as input data for a
long term safety assessment of a repository. Many different test parameters have to be taken into
account, for example water composition and temperature.
leachate. A solution that has been in contact with waste form and, as a result, may contain
radionuclides.
level, clearance. A value, established by a regulatory body and expressed in terms of activity
concentration and/or total activity, at or below which a source of radiation may be released from
regulatory control. See also clearance.
level, exemption. A value, established by a regulatory body and expressed in terms of activity
concentration and/or total activity, at or below which a source of radiation may be granted
exemption from regulatory control without further consideration.
Application for disposal of LLW including HV-VLLW under RSA 1993,
for the East Northants Resource Management Facility:
Supporting Information
July 2009
128
WS010001/ENRMF/CONSAPPCRF 447