Part 21 Report - 1997-420
ACCESSION #: 9706050002
Rosemount Nuclear Instruments Rosemount Nuclear Instruments, Inc.
12001 Technology Drive
Eden Prairie, MN 55344 USA
May 23, 1997 Tel 1 (612) 828-8252
Fax 1 (612) 828-8280
Re: Notification under 10 CFR Part 21 for Model 710DU0CL Trip Calibrator
Pursuant to 10CFR Part 21 Paragraph 21.21 (b), Rosemount Nuclear
Instruments, Inc. (RNII) is writing to inform you of a potential
nonconformance related to certain model 710DU0CL Trip Calibrators.
The circuit boards supplied to RNII and used in assembly of the trip
calibrator may contain test select resistors manufactured by a
non-approved supplier. The affected test select resistors are at
locations R42, R45, and R47.
Model 710 Trip Calibrators supply the current used to calibrate trip
levels in 710 Master and Slave Trip Units. The test select resistors set
the positive and negative calibration current ramp rate.
The 710 Trip Calibrators passed all functional testing prior to shipment
and RNII is not aware of any failures in the field due to the alternate
test select resistors.
1.0 Name and address of the individual providing the information:
Mark Van Sloun
Vice President & General Manager
Rosemount Nuclear Instruments, Inc.
12001 Technology Drive
Eden Prairie, MN 55344
2.0 Identification of items supplied:
Certain Model 710DU0CL Trip Calibrators identified in Attachment A.
3.0 Identification of firm supplying the item:
Rosemount Nuclear Instruments, Inc.
12001 Technology Drive
Eden Prairie, MN 55344
FISHER-ROSEMOUNT
10CFR21 Notification
May 23, 1997
Page 2 of 3
4.0 Nature of the failure and potential safety hazard:
This notification relates to Model 710DU0CL Trip Calibrators with
test select resistors in locations R42, R45, and R47 manufactured by
non-approved suppliers.
RNII does not have sufficient information to determine the safety
impact related to plant applications. Licensees must determine the
impact on plant operations and plant safety and take action as
deemed necessary.
5.0 Corrective action which is taken, the name of the individual or
organization responsible for that action and the length of time taken to
complete that action:
The 710DU0CL Trip Calibrators listed in Attachment A should be
returned to RNII for replacement of the non-approved test select
resistors. Contact RNII Nuclear Marketing at (612) 828-8252 for
return information.
RNII's supplier of the subassembly for the 710DU0CL will remove all
test select resistors from the assembly area so that the approved
part must be requested for each subassembly from the material crib.
This action will be implemented immediately.
No further action related to this issue is expected. Mr. Van Sloun
is responsible should any further action related to this issue be
necessary.
6.0 Any advice related to the potential failure of the item:
When a Readout Assembly is installed in the Trip Calibrator, the
readout display locks if a trip occurs from the Master or Slave
during calibration. The test select resistors set the positive and
negative calibration current ramp rate and unreliable resistance
values could cause a change in ramp rate. If the ramp rate of the
calibration current increases to a value outside of the
specification, the accuracy of the current displayed by the readout
will decrease.
The end user must determine the full scope of this nonconformance as
it relates to plant operations and plant safety and take action as
deemed necessary.
FISHER-ROSEMOUNT
10CFR21 Notification
May 23, 1997
Page 3 of 3
Rosemount Nuclear Instruments, Inc. has a strong commitment to the
nuclear industry and assures you that we are dedicated to the supply of
high quality products and services to our customers. We are sorry for
any inconvenience. If there are any questions, or you require additional
information related to this issue, please contact Jerry Edwards, Ian
Baldry, or Mike Dougherty at (612) 828-8252.
Sincerely,
ROSEMOUNT NUCLEAR INSTRUMENTS, INC
M. L. Van Sloun
Vice President & General Manager
encl.: Attachment A
FISHER-ROSEMOUNT
Attachment A
10CFR21 - Notification Dated May 23, 1997
GE Nuclear Energy
PO NUMBER MODEL NUMBER SERIAL NUMBER
205-96C012 0710DU0CL 0512614
205-96C012 0710DU0CL 0512615
FISHER-ROSEMOUNT
Attachment A
10CFR21 - Notification Dated May 23, 1997
Carolina Power & Light - Brunswick
PO NUMBER MODEL NUMBER SERIAL NUMBER
8K8989CJ 0710DU0CL 0513056
8K8989CJ 0710DU0CL 0512901
8K8989CJ 0710DU0CL 0512902
8K8989CJ 0710DU0CL 0512903
8K8989CJ 0710DU0CL 0512979
8K8989CJ 0710DU0CL 0512980
8K8989CJ 0710DU0CL 0512981
8K8989CJ 0710DU0CL 0512982
8K8989CJ 0710DU0CL 0512984
8K8989CJ 0710DU0CL 0512985
8K8989CJ 0710DU0CL 0512986
8K8989CJ 0710DU0CL 0513192
FISHER-ROSEMOUNT
Attachment A
10CFR21 - Notification Dated May 23, 1997
Entergy Operations Inc. - Grand Gulf
PO NUMBER MODEL NUMBER SERIAL NUMBER
MP96G077 0710DU0CL 0512891
MP96G077 0710DU0CL 0513256
MP534810 0710DU0CL 0512556
FISHER-ROSEMOUNT
*** END OF DOCUMENT ***
Page Last Reviewed/Updated Wednesday, March 24, 2021