The independently developed Generation 3 nuclear power technique of China, HPR1000, lacked an integrated and systematic design process facilitating Examination, Maintenance, Inspection and Testing (EMIT). Therefore, a set of corresponding design evaluation standards requires to be proposed. This paper discusses several evaluation dimensions with regard to spatial layout design for Examination, Maintenance, Inspection and Testing process, e.g., spatial accessibility for both personnel and equipment, operability for working personnel, spatial adequacy for all EMIT activities, convenience for staff to operate, monitor, surveillance, etc. These dimensions aim at proposing a relatively integrated and mature layout design evaluation system for Examination, Maintenance, Inspection and Testing. Quantitative standards are provided as reasonably practicable, according to regulations or codes of China, Europe or the United Kingdom. This paper does not discuss other EMIT aspects which are not related to layout design, e.g., isolability, radiation protection of specific working place during EMIT windows, equipment qualification, etc. Moreover, this paper also takes one of the typical components, Low Head Safety Injection pumps, of one PWR plant in China as a sample to introduce the application of this evaluation system. Within the introduction sample, the implication of each evaluation dimension proposed by this paper is interpreted during a specific and typical design scenario.

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