United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9607300354

                                        Illinois Power Company
                                        Clinton Power Station
                                        P.O. Box 678
                                        Clinton, IL 61727
                         MAY 8, 1996    Tel 217 935-5623
                                        Fax 217 935-4632

                                        Wilfred Connell
ILLINOIS                                Vice President
                                        May 1, 1996

Docket No.  50-461                      10CFR21.21

Document Control Desk
Nuclear Regulatory Commission
Washington, D. C.  20555

Subject:  10CFR21 Interim Report 21-96-004: ITT Barton
          Hydramotor Actuator Pump Assembly Failed to
          Develop Hydraulic Pressure During Testing

Dear Sir:

     On March 6, 1996, Illinois Power (IP) identified the failure of a
pump assembly for an ITT Barton series NH95 hydramotor actuator as a
condition potentially reportable under the provisions of 10CFR, Part 21.
The pump was withdrawn from stores and installed during an overhaul of
the actuator.  The function of the pump is to develop the hydraulic
pressure to operate the actuator.  During testing of the hydramotor
actuator following the overhaul, the pump failed to develop hydraulic
pressure.  IP suspects that the pump did not develop pressure because it
may not be fitted/ported properly.  The pump assembly has been returned
to ITT Barton for inspection.  The pump assembly is ITT Barton part
number NS109761EQX07.

     IP has not completed the evaluation of this condition required under
the provisions of 10CFR, Part 21 and cannot do so until the supplier
completes the inspection to determine the reason for the failure of the
pump to develop pressure.

     ITT Barton has informed IP that the inspection of the pump assembly
is scheduled to be complete by December 31, 1996.  IP will evaluate the
ITT Barton inspection results when received to determine the
reportability of this issue under the provisions of 10CFR,

                                                  Page 2

Part 21 and will notify the NRC of the determination in a final report
following completion of the evaluation.  Additional information about
this issue may be obtained by contacting J.  W.  Blount, Engineering
Projects, at (217) 935-8881, extension 3638.

                                   Sincerely yours,

                                   Wilf Connell
                                   Vice President


cc:  NRC Clinton Licensing Project Manager
     NRC Resident Office, V-690
     Regional Administrator, Region III, USNRC
     Illinois Department of Nuclear Safety
     INPO Records Center
     ITT Barton


Page Last Reviewed/Updated Wednesday, February 12, 2020