United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9508110084

                             FAX TRANSMITTAL

                                                  DRESSER-RAND
                                                  STEAM TURBINE DIVISION
                                                  WELLSVILLE, NEW YORK

                                                  Robert M. Loughlin
                                                  Tel. 716-596-3343
                                                  Fax. 716-596-3753

Date: July 26, 1995

To:  NRC Operations Center              Fax No.  301-816-5151

From:  Robert M. Loughlin

Subject:  "Verbal" Notification by facsimile of a Potential Safety 
          Hazard - 10 CFR Part 21 Initial Report No. 039


A copy of approved 10 CFR Part 21 Initial Report No. 039 is provided as
pages 2 through 5 of this facsimile transmittal (complete transmittal is
5 pages)

Dresser-Rand Steam Turbine Division will submit a written Final Report no
later than August 25, 1995.

Questions relating to this 10 CFR Part 21 Report may be directed to the
undersigned at 716-596-3343 or to Richard Kling at 716-596-3288.


Robert M. Loughlin
Manager - Nuclear and Navy Product Engineering


Form EF-065                        NNSOP 1.2.001, Rev. 2, Page 7 of 9
Rev B                                        Report No. 039
Nuclear NNSOP 1.2.001

                      INITIAL REPORT 10 CFR PART 21
                   REPORT OF A POTENTIAL SAFETY HAZARD

1.   ISSUED TO:                              Date:     July 19, 1995  

Robert Loughlin     Mgr. Navy/Nuclear Eng.   File No.: F-36674A/B/C/D
Richard Kling       Nuclear Product Eng.     Serial 
                                               No.:    T-36674A/B/C/D
Harold Paris        QA Manager               Type:     GS2N
P. J. Hoffmann      VP Engineering           Ref:      N/A
John Gegus          VP Engineered Products
                         SBU                 Part No.: 75233A06
Peter Salvatore     VP Parts and Services
                         Business Unit-DRSD  Dwg. No./ 75233A
                                             Rev. level: D


     PREPARED BY:   Richard Kling
           TITLE:   Supv. N/N Prod. Eng.
       PART NAME:   Nut-Lock-Flex Loc Reg. Height

1.   DESCRIPTION OF DEFECT:

     The possibility of the regular height flex loc nut part number
     75233A06 not fully engaging the locking feature of threads.
     See attachment #1


2.   ENGINEERED EVALUATION & RECOMMENDATION:

     See attached page.


Evaluation/Recommendation prepared By:       Title:         Date:
Approved by Mgr.-Navy/Nuclear 
     Product Engineering:                                   Date:


3.   DESCRIPTION, CHECK ONE

     ____ Yes, this constitutes a safety hazard and requires that a
          report be prepared (Form NN-0002)

     ____ No, this does not constitute a safety hazard and does not
          require any further reporting


          Disposition by D-R President:                Date:

            RETURN TO MGR.-NAVY & NUCLEAR PRODUCT ENGINEERING


2.   ENGINEERING EVALUATION & RECOMMENDATION:

To provide 100% assurance that the locking portion of a nut would be
fully engaged with threads of the mating linkage pin would require nut
FLEXLOC (thin) DRESSER-RAND part number 75232A06 as shown on attachment
#2.  The regular series FLEXLOC nut does not provide full thread
engagement of the locking feature, based on nominal part dimensions as
shown on attachment # 1.

During a seismic event adverse vibration condition the locking force
could be questionable.  With the thinner nut DRESSER-RAND part number
75232A06 would provide a better design because of the greater assurance
of full locking feature engagement by meeting the design requirements for
the above conditions.

Based on the information above, Product engineering has the following
recommendations.

          1.   This defect does constitute a safety hazard and requires
          that a report be prepared.

          2.   Review the Terry nuclear bill of materials that call out
          either of these nuts and evaluate the individual applications.

          3.   All nuclear customers should be made aware of this
          potential defect.


Evaluation/Recommendation 
     Prepared by:             Title:  Product Eng.     Date: 7-20-95

Approved by Mgr.-Navy/Nuclear 
     Product Engineering:                              Date:


Figure "ATTACHMENT #1, REGULAR NUT DRESSER-RAND P/N 75233A06
SPS-FLEXLOC
NO. 21FA616 SCALE 2:1" omitted.


Figure "ATTACHMENT #2, THIN NUT DRESSER-RAND P/N 75233A06 SPS-FLEXLOC
NO.
21FK616 SCALE 2:1" omitted.


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