Nuclear Plant Journal, September-October 2014 NuclearPlantJournal.com
47
by the Dominion Visual Testing (VT)
Level III. Use of the tool eliminated the
need for a large number of personnel
that directly resulted in the personnel
exposure and cost savings to Dominion.
Productivity/Efficiency
Application of both the innovative
automated examination tool and special
shielded work platform contributed in
a 72% decrease in task personnel. The
reduced personnel needs resulted in 66
man-week savings for the SPS-1 project.
Dominion will realize an overall total of
264 man-weeks savings for application
of the Core Barrel (CB) examination
technique and equipment at all four units
(Surry Units 1 & 2 and North Anna Units
(1 & 2). Water shields are required for
the 10 YR ISI inspections at Surry Units
1 & 2 and North Anna Units 1 & 2 due
to the high general area dose rates on the
refueling floor area when the core barrel
is placed in its storage stand.
Transferability
The Core Barrel Examination tool
platform that has the capability to provide
remote operated Lower Girth Weld
Inspection, Lower FlangeWeld Inspection
and on board hydro lazing system is
directly transferable and beneficial to all
plants with protruding Core Barrels. The
tool and special shielded work platform
were utilized at Surry Unit 2 Spring 2014
outage and at both North Anna Unit
1 and 2 to fulfill the License Renewal
Amendment required examinations. This
innovative tool has full transferability to
all Westinghouse design plants requiring
similar Core Barrel weld inspections
in accordance with the MRP227/228
requirements. These design plants will
receive the Safety, dose savings and cost
savings benefits from the automated
remotely operated tool and the encoded
weld inspection area repeatability. In
addition, the NDE vendor is transferring
the equipment hardening techniques
developed during the tool mock-up
testing for equipment reliability, and
evaluating use of the tool platform’s
innovative multi-motion systems and
robust component design for use in
Boiling Water Reactor in Vessel Visual
Inspection (IVVI) examination tooling
systems.
Contact: Janean Sealey, Surry Power
Station, 5570 Hog Island Road, Surry
Virginia 23883; telephone: (757) 365-
2452, email:
.
Lower Girth Weld Inspection Tool.
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