Princeton Plasma Physics Laboratory annual report, October 1, 1983-September 30, 1984 Page: 15 of 123
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experiments without violating the design radiation
dose at the site boundary while maintaining adequate
protection of electronics in the Test Cell Basement
Accordingly, a modular concrete lining of the Test
Cell was designed, and some of the numerous
penetrations of the Test Cell floor were filled with a
radiation shielding material. The latter is a PPPL
development that is easy to install in the presence
of complex equipment inside the penetration, easy
to drill through if new equipment has to be installed,
and is inexpensive. A boron coating of the entire Test
Cell Basement floor was added, which will cut down
the thermal neutron flux experienced by the
electronics.
The quality of shielding depends upon the accuracy
of the radiation transport analysis. Neutron measure-
ments (flux and spectra) were prepared in order to
check the calculated predictions in the basement. The
detectors were calibrated (with INEL and ORNL
cooperation) relative to a californium standard and
to an ORNL linear accelerator with calibrated yield
and spectrum.
Remote Handling
Preparation for the remote-handling capability for
TFTR was resumed in FY84. Activity was restricted
to the maintenance of parts with a high probability
of required change (eg., components exposed to
plasma at high-power levels). This task was given
to a team from Canadian industry, supported by
engineers of the Hanford Engineering Development
Laboratory.
Numerous studies on remote handling for TFTR
have been executed over the years. This time the main
thrust is towards experimental studies involving:
demothballing of the M-3 Mock-Up of TFTR and
upgrading it for demonstrations; time studies of the
"hands-on” maintenance (see Fig. 12) of in-vessel
components (e.g., limiter tiles) under ihe assumption
of a mildly activated, tritium-contaminated TFTR;
implementation of a computer interface between the
master and the slave arms of a manipulator (Tele-
Operator Systems Corporation) to provide for higher
flexibility and reliability (done by ORNL); removal and
attachment of a port cover by a gantry-mounted robot
(see Fig. 13). Demonstrations of the remote exchange
of the movable limiter, surface pumping panels
(together with HEDL), and tiles are in preparation.
These activities require development work as well
as the design andacquisition of some novel hardware.
By largely using standard industrial equipment, such
as robots, experience will be gained in the trade-
off between the use of state-of-the-art equipment,
development of new tools, modification of TFTR, or
highly adaptive tooling. Further information is
expected concerning the required dynamic response
of the various components.
Towards the end of the year, an agreement between
the Canadian Fusion Fuels Technology Project and
PPPL was ready for signature. The agreement covers
the full scope of a five-year program. In preparation
for this collaboration, a work breakdown structure
Fig. 12 An example of “hands-on" maintenance. (84E1176)
Fig. 13. The top photo depicts a scale of the robot's size.
The bottom photo shows port-cover bolts being removed
by the robot (85E0511)
15
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Phillips, C.A. (ed.). Princeton Plasma Physics Laboratory annual report, October 1, 1983-September 30, 1984, report, January 1, 1984; New Jersey. (https://digital.library.unt.edu/ark:/67531/metadc1094917/m1/15/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.