BS IEC 62954:2019 pdf download.Nuclear power plants - Control rooms - Requirements for emergency response facilities
9.1 General
The three facilities that comprise the ERFs perform quite different roles, as described in 5.2,requiring a range of functions and associated tasks to be performed by the respective emergency teams. Some of these functions and tasks may be autonomous, but others will be closely linked to functions and tasks being performed by other members of the same emergency team or by other emergency teams.
9.2 Operational experience
Experience from NPPs and other facilities that have conducted emergency exercises, or have experienced a reactor incident or accident situation, should be collected, analysed and fed back to the design of ERF for new NPPs or the upgrading of ERF for existing NPPs.
9.3 Functional analysis and assignment
Although it is not practicable to specify the full range of eventualities that an emergency response may involve, analysis should be performed for the generic functions that are likely to be required in response to a defined set of postulated accident scenarios of differing severities. Following analysis, these functions should be assigned to the relevant ERFs and emergency teams.
The functions (e.g. analyses, calculations etc.) assigned to the emergency teams should be further evaluated and the extent by which these can be performed automatially (e.g. upon request) by I&C equipment should be determined, both in order that these can be performed more quickly and to reduce the likelihood of human error.
Even where such functions are performed automatically, appropriate information should be provided to the emergency teams in hard copy form to permit manual implementation in the event of loss of the automated means.
9.4 Task analysis
Analysis should be performed to confirm that the tasks required to accomplish the functions assigned to the emergency teams are feasible in the time assumed, and that the equipment,communication means and other arrangements for performing the tasks are adequate.
11 Equipment qualification
A qualification programme shall ensure that the equipment providing the required information to the ERF is capable of meeting its design performance requirements (e.g. range, accuracy,response, robustness) needed for their functions under
the environmental conditions postulated to prevail at the time these will be needed. The programme shall include a plan to ensure that the equipment is qualified for the intended period of use, and provide for timely requalification or replacement.
IEC/IEEE 60780-323 provides requirements for the qualification of electrical equipment of class 1 and class 2.
12 C ommunications
12.1 Communication principles
The ERF shall have a comprehensive overview of the plant and of the activities of the different teams working on the plant. Means of communication shall be provided between the different parts of the ERF and with the strategic locations internal to the NPP, e.g. MCR, SCR,access control points, assembly points, etc.
In addition, the ERF are typically supported by external experts and are expected to inform civil authorities about the situation. Means of communication with the relevant ff-site centres and facilities shall be provided as required by the emergency plans.BS IEC 62954