| Review
Title |
Coil Testing Control and
Protection Peer Review |
| Date |
09 June 2006 |
| Cognizant
Engineer |
Raki Ramakrishnan |
|
Responsible Line Manager |
Wayne Reiersen |
|
Review Board Chairperson |
Al von Halle |
|
Review Board Members |
Geoff Gettelfinger, Bob
Marsala, Wayne Reiersen, Mike Williams |
|
Invitees |
Bob Marsala, Raki
Ramakrishnan, Geoff Gettelfinger, Larry Dudek, Bob Woolley, Wayne
Reiersen, Don McBride, Gene Baker, Gregg Pitonak, Judy Malsbury, Colin
Phelps, Bob Simmons, Phil Heitzenroeder, Mike Williams, Jerry Levine,
Brad Nelson, Dave Williamson, Al vonHalle |
|
Attendees |
Larry Dudek, Bob Woolley,
Don McBride, Gene Baker, Judy Malsbury, Colin Phelps, Bob Simmons, Phil
Heitzenroeder, Gregg Pitonak, Brad Nelson, Dave Williamson, Kevin
Freudenberg |
|
Charge |
|
|
Design Review Material |
Announcement
Chits and Disposition
Presentation
Review Committee Report
|
|
Review Board Report |
 |
|
Items Reviewed |
|
Sat |
Unsat |
Comments |
|
Appropriate requirements identified
|
 |
|
|
|
Development plans and schedules |
|
|
|
|
Regulatory compliance including USQD and NEPA |
|
|
|
|
Disposition of CHITS from previous reviews |
|
|
N/A |
|
Cost
objectives |
|
|
Not covered in this review |
|
Other
review objectives addressed
(Attachment 4 of ENG-033) |
|
|
|
|
Summary of Results
|
A peer review of the
additional control and protection systems needed to complete power
testing of the NCSX C1 coil with a known resistive line to ground
leakage path was held. A design was received that would establish
an artificial null to minimize the potential at the known C1 coil
leakage path, and to provide ground fault protection via a ground fault
relay to be provided as shown in NCSX sketch B-4F1005. Voltage limiting
schemes were presented and discussed. Metal Oxide Varistor (MOV),
added at both sides of the C1 coil, will clamp the coil voltage to 500
volts. The test procedure will be updated to include warm/cold
coil Megger at 1 kV, and the daily ECS operating routines will include a
500 V Hipot of the entire circuit before rectifier power is applied.
Also, monitoring points will be brought out of the cryostat to provide
the ability to measure coil voltages at each terminal if required.
The review committee agreed that these systems should be implemented as
presented. |
|
Disposition
(check
one) |
Acceptable |
|
1 Acceptable pending resolution of concerns -
CHITS identified above must be resolved prior to installation. |
|
1 Incomplete -
Additional design
work is required prior to another design review.
|
|
Cog Engineer Close-out
(check
when done) |
|
|
1
Action required by Disposition is complete |
