Environmental Engineering Reference
In-Depth Information
The compliance criteria for water chemistry parameters are defi ned in the
relevant chemistry instructions.
The steps described in the sections above can be illustrated by the exam-
ples for civil structures given in Table 8.8.
Corrective actions
Any damage not in compliance with the acceptance criterion should be
repaired if possible. In the case of fatigue cumulative usage factor (CUF)
> 1.0, appropriate fatigue monitoring and a focused in-service inspection
programme can be implemented.
Administrative control
The administrative and organization arrangements have to be defi ned for
the performance of ageing management programmes. Appropriate plant
procedures have to ensure the planning, staffi ng, performing, documenting
and management control of the AMPs. Proper systems for documentation
and reporting have to be established. A proper quality assurance plan also
has to be developed for AMPs.
Operational experience feedback
A system for the verifi cation of the effectiveness of AMPs and feedback
of experience has to be in place at plants. In the case of any damage dis-
covered, the degradation mechanism should be identifi ed followed by an
evaluation of whether the given degradation mechanism is appropriately
managed by the AMP(s).
8.4.3 Reviewing and qualifying the ageing management
activity
￿ ￿ ￿ ￿ ￿ ￿
Attributes of adequate ageing management programmes are defi ned by the
regulation; see for example the NUREG-1801 (US NRC, 2010) adapted by
several VVER operating countries. An adequate AMP has to have the fol-
lowing elements:
1
D e fi nition of SSCs that are subject to ageing management
2
Actions to prevent or mitigate specifi c ageing processes
3
Surveillance, monitoring and testing of all parameters related to the deg-
radation of the function or serviceability of the SSCs
4
Investigation of ageing factors that may cause degradation or loss of
function of SSCs
Search WWH ::




Custom Search