PROTECTION OF SITE PERSONNEL UNDER ACCIDENT CONDITIONS

PROTECTION OF SITE PERSONNEL UNDER ACCIDENT CONDITIONS 

This section deals with design for the protection of site personnel from radiation that arises from accident conditions. In the design process, a proper assessment should be made of the magnitudes and locations and the possible transport mechanisms and exposure pathways for the radiation sources that will be present in and after accident conditions. All potential accident scenarios including severe accidents should be considered in this assessment (see Annex III). 

The design should be such that the operator can ensure the safety of all persons on the site in the event of an aceident or radiological emergency, in compliance with international requirements for emergency preparedness [20]. 

An analysis should be made of the areas of the nuclear power plant in which it is necessary to maintain habitability for the purpose of taking both accident management measures and emergency preparedness measures. Areas to which access is expected to be required in emergencies include the control 

Provisions should be made for shielding the radiation sources, in addition to those provisions required during operation, to ensure that personnel can have access to and can occupy the plant control room or the supplementary control points (e.g. the location of the remote shutdown panel) so as to operate and maintain essential equipment without exceeding established dose limits as specified in paras V.27-V.32 of the BSS [2] and paras 4.57-4.65 of Ref. [20]. This includes access to equipment in cases where maintenance or repair may be necessary after an accident. In general, provision should be made to render direct intervention by operators superfluous by instaUing automatic or remote controlled equipment (e.g. remote controlled valves). 

---