In-Service Inspection of Nuclear Power Plants - gnssn - International ...

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Doc. no.
KKG-Q-KPOOl
NUCLEAR POWER PLANT GOESGEN-DAENIKEN LTD
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2. Examination regulations
SVDB-NE14, Rev. 2 (18.2.1986), procedure for in-service inspection
and supervision of nuclear power plant components subject to
acceptance and belonging to safety categories 1-4.
3. Examination time schedule
3.1 The baseline inspection took place after the pressure testing of
the primary system. For the pressurizer, which was already pressure
tested on completion of fabrication, this means that the baseline
inspection followed the second component pressure test.
3.2 The SVDB is invited in due course by the KKG to undertake
supervision of the baseline and in-service Inspection test.
Announcement of the test is issued with the relevant annual or
outage inspection schedules.
4. Examination conditions
4.1 Examination of the pressurizer proceeds in accordance with the
component examination programme tables.
4.2 In principle, the tests are conducted from the outside only, after
removal of the insulation.
Justification; After operation startup, a specific activity of 57
(gas) or 11 (water) Ci/m 3 is to be expected in the
interior of the pressurizer.
Exception :
Visual Inspection of the internal plating and
internal components in the area of the handhole
nozzle.
N.B. Owing to the built-in thermal skirt, internal
inspection of the vessel wall is not possible
from the manhole.
4.3 The test methods and specifications together with the test
programme for the individual test areas can be seen from the
component examination programme table.
4.4 The position and designation of the welds or examination zones can
be seen from Annex 1.
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