Solid Radioactive Waste Strategy Report.pdf - UK EPR

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EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 168 / 257 radioactive materials. Additionally suitable precautions will be taken to manage inventories of fuel tanks in waste and spent fuel transporters. 10.3.2.6 Chemicals Chemicals are used as part of the waste treatment and conditioning process and during maintenance of plant and equipment. Depending on the chemical properties, these chemicals may cause operator injury through skin contact / inhalation or by fire or corrosive hazards. Where possible, hazardous chemicals shall be substituted for chemicals with less harmful properties. Other controls shall include isolating the operator and environment from the chemical, minimising the held inventory of stored chemicals, providing suitable storage arrangements such as physical segregation of incompatible chemicals with bunding, fire protection and access controls, ventilation arrangements and provision of personnel protective equipment. The use of chemicals will be in accordance with the requirements of the Control of Substances Hazardous to Health (COSHH) Regulations 2002 (as amended). 10.3.2.7 Machinery Many of the items of equipment that will be used for the treatment and conditioning of solid wastes will involve fast moving and/or sharp parts or application of high compressive forces which may present a hazard to operators both through industrial injury and / or radioactive contaminated wounds. Examples of such items of equipment include shredders and compactors. Some of the items of equipment that will be used for the handling of waste packages, spent fuel assemblies and their containers may present a hazard to operators both through industrial injury and / or radioactive contaminated wounds. Examples of such items of equipment include lifting equipment and transfer trolleys. The operator will be isolated from the hazard by carrying out the majority of operations remotely. Machinery that presents a physical injury hazard will be appropriately guarded and/or interlocked to meet the requirements of the Provision and Use of Work Equipment Regulations (1998). 10.3.2.8 Access The use of equipment such as fork lifts and trolleys shall be restricted to minimise vehicle movements and reduce the potential for interaction with personnel routes. Likewise, where practicable the process flow shall be optimised to ensure segregation of waste and spent fuel movements from personnel access routes. Movement of vehicles and personnel within reception halls shall be restricted to minimise vehicle movements and reduce the potential for interaction with personnel. Emergency lighting will be provided in all occupied areas to reduce the likelihood of industrial incidents such as slips, trips and falls resulting in operator injury. Access to areas where there is the potential for radiological exposure will be controlled. Access to areas where there is the potential for high dose uptake will be interlocked to prevent inadvertent exposure.
EPR UK N° NESH-G/2008/en/0123 REV. A PAGE 169 / 257 10.3.2.9 External Events External events are challenges to a facility that could originate outside of a facility and therefore cannot be prevented by safety systems within the facility itself. The facility, therefore, must be robust against those challenges that could lead to a release of radioactive material. The waste and spent fuel management buildings and the operations contained within could be challenged by a variety of external events resulting in a range of scenarios including loss of containment or fire. These include aircraft crash, seismic, lightning strike, flooding, extreme weather and external explosion. 10.3.2.9.1Seismic Event (Earthquake) The waste and spent fuel management building structures will be designed to withstand a design basis earthquake in accordance to the relevant engineering standards. 10.3.2.9.2Lightning Strike The waste and spent fuel management facilities will include a lightning protection system in accordance with relevant engineering standards. 10.3.2.9.3Flooding The facilities will be designed and located to minimise the likelihood and consequences of flooding. The risk is also mitigated by the appropriate design of the surface water drainage system to protect against extreme rainfall. 10.3.2.9.4Loss of Electrical Power Supply The waste and spent fuel management facilities will use, where possible, passively safe systems that do not rely upon electrical power supplies to perform their safety functions. In the event of a loss of the main electrical power supply, secondary electrical supplies and emergency electrical supply will provide, if required, power to safety critical systems, instruments, utility service systems and operating systems to allow safe conditions to be maintained at all times. Discharge monitoring equipment will be connected to emergency electrical supplies to ensure their continued operation. 10.3.2.9.5External Explosion / Missiles Explosions external to the waste and spent fuel management buildings may subject these buildings to shock wave and/or missile impacts. To reduce the possibility of explosion risk, the use of pressurised gas bottles will not be used or stored within the waste and spent fuel facilities. Pressurised gas supplies will be piped into the facilities from an external source where their use is required (e.g. for instrumentation or inerting spent fuel storage containers).
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Solid Radioactive Waste Strategy Report.pdf - UK EPR

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