United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9602230108



                                                  SENTINEL



                                                  Amersham Corporation

                                                  40 North Avenue

                                                  Burlington, MA 01803

                                                  tel (617) 272-2000

                                                  tel (800) 225-1383

7 Feb 1996                                        fax (617) 273-2216



Document Control Desk                             Amersham

U.S.  Nuclear Regulatory Commission               QSA

Washington, DC 20555



Dear Sir or Madam:



Amersham is closing out the potential Part 21 defect reported to you in

an interim report on 8 Sep 95.  The interim report concerned a model 899

drive cable connector that pulled off the drive cable.



We have performed extensive testing to try and recreate the incident.

The results of the tests indicate that the drive cable connector performs

as designed and withstands the tensile test requirement of ANSI N432

after successfully completing the endurance test described in ANSI N432.

The endurance test was conducted using a setup that simulated use in the

Century type equipment as described in our letter dated 8 Sep 95.  This

setup was hypothesized to be a worst case condition due to the hard

impact the connector receives when returned to the stored position.  We

have been unable to recreate a scenario under normal operating conditions

that would cause the connector to pull off.



In addition a review of similar occurrences has shown that there was some

type of impact to cause the connector to pull off.  As there is no

indication of a defect in manufacturing, and the drive cable connector

performed as required as evidenced by the testing , we conclude that

there is no substantial safety hazard as a result of a defect and

therefore no Part 21 impact.



Please contact me if you require any additional information.



Sincerely,



Cathleen Roughan

Regulatory Affairs Manager



cc:  Mr.  John Kinneman

     U.S.  Nuclear Regulatory Commission

     Region I

     475 Allendale Road

     King of Prussia, PA 19406



     Mr.  Steve Baggett

     Sealed Source Safety Section

     Source Containment and Devices Branch

     Division of Industrial and Medical Safety, NMSS

     U.S.  Nuclear Regulatory Commission

     1 White Flint North

     11555 Rockville Pike

     Rockville, Maryland 20852



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