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The above areas have emphasized SSCs performing a structural safety function derived
from the confinement evaluation guidelines. The testing and inspection program also applies to
safety-class SSCs performing a control, monitoring, or power function. The tests and
inspections that assess parameters related to the safety function should be identified. For
safety-class I&C components, this could include periodic or continuous testing of circuit
continuity, presence of grounds, or determination of circuit noise levels. Remote Maintenance
The design should make provisions for appropriate accessibility, adequate shielding, and
reliable remote handling equipment to facilitate planned maintenance and conceivable repairs.
Remote maintenance requirements should be developed early in the design process taking into
account the need to keep worker exposures as low as reasonably achievable (ALARA). It is
strongly recommended that mockups or models be constructed during the detailed design
phase to confirm the feasibility of human and remote maintenance system design. More detailed
guidance is provided in Section 6.4.4. Human Factors
Fusion facilities should consider human factors and operator-machine interfaces in the
early design and throughout the entire design process. The final design should eliminate, to the
extent practicable, the need for human interaction in the detection and mitigation of off-normal
events, including design-basis events. To the extent that human interactions are required, these
interactions should be specifically identified and justified by appropriate analysis, such as
human reliability analysis, to ensure the human interaction can be performed under the antici-
pated environmental conditions and within required time constraints at an acceptable level of Fire Protection
The probability and effect of fires and explosions at fusion facilities should be minimized.
Safety-class SSCs should be designed and located to minimize, consistent with their intended
safety function, the probability and effect of fires and explosions. Noncombustible and heat-
resistant materials should be used whenever practical throughout the facility, particularly in
areas vital to the control of hazardous materials and maintenance of safety functions. Fire
detection and mitigation systems should be designed and provided with sufficient capacity and
capability to minimize the adverse effects of fires and explosions on safety-class SSCs. Fire
fighting systems should be designed to ensure that their rupture or operation does not signifi-
cantly impair the safety function provided by safety-class SSCs. The effect of fire suppression
systems on the facility should be considered. Current requirements for fire protection programs
are provided in DOE 1995a.

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