Design Features for Radiation Protection

Design features for radiation protection this covers how radiation protection has been applied to the design of the reactor plant. 

The type of reactor significantly influences needs for radiation protection. While most research reactors of low and medium power levels will have similar characteristics, some designs, in particular at higher power levels, should have particular radiation protection features and programmes. 

Chapter 12 presents the processes for normal operational dose assessment and radiation protection programme design features. 

The majority of the supporting analysis and evidence that radiation protection has been considered in the AP1000 design is contained in Chapters 11 and 12 of the APIOOO European Design Control Document (EDCD) (Reference 12.1). This includes the design features that have been incorporated to minimise the necessity for and the amount of time spent in a radiation area. 

The APIOOO design provides features for protection against radiation including ... 

The design objectives for accident conditions are to limit to acceptable levels (1) the risks to the pubhc from possible releases of radioactive material from the nuclear power plant and (2) the risks to site personnel from these releases and from direct radiation exposure. These design objectives should be achieved by means of high quality design and special features, such as safety systems and protection systems, that are incorporated into the design of the... 

This section should provide a description of the design features of the equipment and the facility that ensure radiation protection. It should provide information on the shielding for each of the radiation sources identified, describe the features for occupational radiation protection, describe the instrumentation for fixed area monitoring of radiation and continuous monitoring of airborne radioactive material, and the criteria for their selection and placement, and address design provisions for any decontamination of equipment, if necessary. 

In general, application of the optimization principle in radiation protection implies that a choice is to be made from a set of possible protective measures. To this end, feasible options should be identified, the parameters to serve as criteria for comparison and their appropriate values should be determined and, finally, the options should be evaluated and compared. The optimization principle should also be applied to design features whose purpose is to prevent, or to mitigate the consequences of, accidents at the facility that could lead to radiation exposure of the site personnel or the public. 

Irradiation facilities and experimental facilities use direct radiation from the core, the irradiated fuel or activated sources, which may pose a radiation hazard to personnel. For such facilities, special design features should be put in place to provide for radiation monitoring and radiation protection. This applies... 

There are several features of pool management which contribute to the safe operation of wet storage facilities. These include operations that maintain design parameters and minimize corrosion for pool structures, systems and components, and promote radiation protection, such as shown in Table I ... 

There are five safety systems in Lungmen DCIS. They are Reactor Protection System (RPS), Neutron Monitor System (NMS), Process Radiation Monitoring System (PRMS), Containment Monitoring System (CMS), and Engineered Safety Features (ESF). The software development for all these safety systems follows the BTP-14 requirements. Along with the development, the IV V activities are performed. Of the safety systems, RPS, NMS, PRMS and CMS are designed by GE NUMAC, and ESF is sub-contracted by GE to Eaton Corporation. 

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