United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9606180635



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Information & Support Services

P.O. Box 3707

Seattle,  WA 98124-2207



June 11, 1996

G-1151-SJA-96-337



Document Control Desk

United States Nuclear Regulatory Commission

Washington, D.C. 20555



Reference: a)  Boeing Letter G-1151-RSO-92-365 dated August 31, 1992; R.

               S.  Orr to the NRC Operations Center



           b)  NRC Letter Docket No. 99901227 dated August 12, 1992; L.

               J.  Norrholm to R.  S.  Orr; Subject: Response to 10 CFR

               21 Inquiry



Dear Sir or Madam:



In accordance with the reference correspondence and 10 CFR 21, Boeing is

sending the NRC the attached error notice(s) received from our former

software suppliers.  Because of unknown current addresses, the following

former customers were not notified:



     Reactor Controls, Inc.

     Echo Energy Consultants, Inc.

     Nuclear Applications and Systems Analysis Company (Japan)

     Nuclear Power Services

     Tenera Engineering Services Gibbs & Hill, Inc.

     Error notices have been sent to our other former customers.



Very truly yours,



Sandra J.  Andrews

Nuclear Administrator

G-1151 M/S 7A-33

(206) 865-6248



Attachment(s): ANSYS Class3 Error Reports 96-15, 96-16, 96-17, 96-18, 96

               19, 96-20;

               ANSYS QA Notice QA96-04;

               Class3 Error Report Summaries for Rev.  5.1 and Rev.  5.2



ANSYS [Registered Trademark]  ANSYS, Inc.

                              201 Johnson Road

                              Houston, PA     Telephone 412.746.3304

                              15342-1300      Facsimile 412.746.9494



                              May 31, 1996        JUN 10 1906

                                                  CONTRACTS



Dear Class3 Error Recipient:



     Enclosed you will find ANSYS Class3 Error Reports 96-15, 96-16, 96-

17, 96-18, 96-19, 96-20 and ANSYS QA Notice QA96-04.



     QA Notice QA96-04 is being issued to clarify a warning message

produced when the LDREAD command is used to transfer heat generation

rates from a harmonic magnetic analysis to a FLOTRAN analysis.  As

mentioned in the QA Notice, a macro is available on the ANSYS HomePage

that may be used to assist users in transferring heat generation rates

for such cases.



     Also enclosed, for your convenience, are Class3 Error Report

Summaries for Rev.  5.1 and Rev.  5.2, sorted both by keyword and Class3

Error Report Number.



                              Sincerely,



                              ANSYS, Inc.



                              Ken Podlaszewski

                              Associate QA Engineer



                ANSYS is a registered trademark of SAS IP



                  ANSYS Revision Identifier Description



ANSYS revision identifiers consist of a major revision level, a minor

revision level, a correction level, and occasionally a special version

level.  An example of how this is constructed is shown below:



Figure omitted.



     Major revision level changes indicate that new features have been

added to the program and that some level of program architecture change

and/or file structure has occurred.  Minor revision level changes also

indicate that new features have been added to the program, but files are

upwardly compatible.  All known error fixes are included in both minor

and major revisions.  Changes to the correction level indicate that it is

primarily an error correction release.  Special version identifiers

indicate that one or more additional minor changes have been made to the

program, normally to circumvent an error.  Special versions are not

general releases to all ANSYS licensees, since they typically represent

errors occurring only on one system, a subset of our customers who have

specific graphics devices, etc.



     The ANSYS revision identifier(s) shown under "corrected in" on the

front side of this Class3 Error Report indicates the first possible

revision that could contain the correction.  A major program change

needed to fix an error can dictate that the next minor or major revision

will contain the fix rather than the next correction level.  For example

when errors were being reported while Rev.  4.3A was the latest

production version, most Class3 error reports indicated that 4.3B was the

"corrected in" revision.  Others requiring significant code restructuring

were reported as fixed in 4.4.  Rev.  4.3B was never released, but Rev.

4.4 contained all error corrections noted as fixed in 4.3B.



     An identifier indicated under "corrected in" does not guarantee that

a general release of that revision of ANSYS will occur.  It does indicate

that the correction is known and implemented in the coding that would be

part of that general release.



                     Equivalent Product Identifiers



     The ANSYS family of products occasionally undergoes name changes

between revisions and/or changes in the functionality of derived products

(such as ANSYS-PC/LINEAR).  To minimize the potential for confusion in

these areas, the important product name equivalences (similar program

functionality and error content) are listed below.



     ANSYS/ED  contains all errors shown for   the full ANSYS product,

                                               starting at Rev. 5.0,

                                               and beyond, unless

                                               otherwise noted.



     PC/LINEAR is equivalent to                WS/LINEAR at Rev.  4.4A.

                                           and ANSYS/LINEAR starting at

                                               Rev. 5.0.



     PC/THERMAL is equivalent to               WS/THERMAL at Rev.  4.4A,

                                           and ANSYS/THERMAL starting at

                                               Rev. 5.0.



     PREPPOST   contains relevant errors        the full ANSYS product,

                shown for                       for included pre-

                                                and postprocessing

                                                functionality



             ANSYS[Registered Trademark] CLASS3 ERROR REPORT



                                             ERROR NO: 96-15



KEYWORDS:           GP             LSWRITE             LSSOLVE



DESCRIPTION OF ERROR:



     Use of a file created by the LSWRITE command, when used in

combination with gaps defined by the GP command, can lead to doubling of

the gap stiffness on the first load step if the LSWRITE command was

issued after the gaps were defined and the load step file (LSSOLVE) is

read without deleting the gaps in the database (using GPDELE).



FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/



Rev.  5.0                               Release 5.3

ANSYS/LinearPlus Rev.  5.0A             ANSYS/LinearPlus Rev.  5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



1.   Issue LSWRITE before defining gaps; or



2.   SAVE the database before defining the gaps and RESUME the database

     after defining the gaps and issuing the LSWRITE command; or



3.   Delete the gaps after issuing the LSWRITE command and SAVE the

     database.



COMMENTS:



1.   The doubling of the gaps occurs only on the first load step, because

     after the first load changes in the gap stiffness are not allowed.



2.   In Release 5.3, a warning will be issued when gaps are read in from

     an input file for a model in which gaps already exist.  The

     definition will not be blocked, however, since under some conditions

     it may be desirable to duplicate gaps at a node.



3.   The procedure for running in the corrected version is the same as

     for running in the uncorrected version.



AUTHOR/CORRECTOR:                            DATE:     May 28, 1996

                    Christopher W. Aiken



REVIEWED BY QA:

                    William J. Bryan         DATE:     May 28, 1996



APPROVAL:

                    John A. Swanson          DATE:     May 28, 1996



*_/If a product name is no included in the "first incorrect version", the

full ANSYS program is implied.  For products not listed, this error does

not apply, but see the reverse side for equivalent product designations.



Unless noted otherwise, this error report also applies to all revisions

after the first incorrect one and prior to the corrected revision.  All

revisions after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS revision

identifiers.



             ANSYS[Registered Trademark] CLASS3 ERROR REPORT



                                                  ERROR NO: 96-16



KEYWORDS:      IMPOSED DEGREES OF FREEDOM         RAMP TO ZERO



DESCRIPTION OF ERROR:



     All results are incorrect when:



    1.    one or more imposed degrees of freedom (D command) are ramped

          over a load step (KBC,O) from a nonzero value to a zero value:



and 2.    there are at least two substeps in the ramp;



and 3.    option on the NROPT command is 1 (FULL) or 2 (MODI) (option

          defaults to this when using plasticity, large deflection,

          contact elements, etc.).



FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/



Rev.  4.0                               Release 5.3

ANSYS/Emag Rev.  5.0A                   ANSYS/Emag Release 5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Either ramp imposed degree(s) of freedom to a very small non-zero

value (e.g.  1.0e-8) instead of zero, or use a value of 3 (INIT) for

option on the NROPT command.



COMMENTS:



     At Revisions 4.0 to 4.4, the NT command could also be used to

specify imposed degrees of freedom.



AUTHOR/CORRECTOR:                            DATE: May 28, 1996

                    Peter Kohnke



REVIEWED BY QA:                              DATE: May 28, 1996

                    William J.  Bryan



APPROVAL:                                    DATE: May 28, 1996

                    John A. Swanson



*_/If a product name is not included in the "first incorrect version",

the full ANSYS program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



Unless noted otherwise, this error report also applies to all revisions

after the first incorrect one and prior to the corrected revision.  All

revisions after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS revision

identifiers.



             ANSYS[Registered Trademark] CLASS3 ERROR REPORT



                                                  ERROR NO: 96-17



KEYWORDS:      MODAL ANALYSIS           LARGE DEFLECTION



DESCRIPTION OF ERROR:



     The stresses in modal and spectrum analyses of large deflection

solutions (See section 3.3.4 of the Procedures Manual) are incorrect.



FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/

Rev.  5.1                               Release 5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



COMMENTS:



     The frequencies and mode shapes in the uncorrected version are

correct.



     The correction at Release 5.3 will require the use of a new command

(UPCOORD, on) to update the coordinates of the elements upon which to

base the stress calculations.



AUTHOR/CORRECTOR:                            DATE: May 28, 1996

                    Peter Kohnke



REVIEWED BY QA:                              DATE: May 28, 1996

                    William J. Bryan



APPROVAL:                                    DATE: May 28, 1996

                    John A.  Swanson



*_/If a product name is not included in the "first incorrect version",

the full ANSYS program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



Unless noted otherwise, this error report also applies to all revisions

after the first incorrect one and prior to the corrected revision.  All

revisions after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS revision

identifiers.



             ANSYS[Registered Trademark] CLASS3 ERROR REPORT



                                                  ERROR NO: 96-18



KEYWORDS:      SHELL43   ELEM43  STRESS STIFFENING  PRESTRESS   MODAL



DESCRIPTION OF ERROR:



     SHELL43 elements with pre-stress modal analysis using subspace

method [MODOPT] produces incorrect results.



FIRST INCORRECT VERSION(S):*_/               CORRECTED IN:*_/



Rev.  5.0                                    Rev.  5.1



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use SHELL63.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: May 28, 1996

                    Charles Rajakumar



REVIEWED BY QA:                         DATE: May 28, 1996

                    William J. Bryan

APPROVAL:                               DATE: May 28, 1996

                    John A. Swanson



*_/If a product name is not included in the "first incorrect version",

the full ANSYS program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



Unless noted otherwise, this error report also applies to all revisions

after the first incorrect one and prior to the corrected revision.  All

revisions after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS revision

identifiers.



             ANSYS[Registered Trademark] CLASS3 ERROR REPORT



                                                  ERROR NO: 96-19



KEYWORDS:      P-METHOD       PCONV          NODE COMPONENT



DESCRIPTION OF ERROR:



     If a node component name is used in the NODE field for the PCONV

command the node where convergence checking is to be performed, the

component is not used.



FIRST INCORRECT VERSION(S):*_/          CORRECTED IN:*_/



Rev.  5.2                               Release 5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use multiple PCONV commands to specify each node for convergence

checking.  Up to 10 specifications may be input.



COMMENTS:



     Node components are defined using the CM command.



AUTHOR/CORRECTOR:                            DATE:     May 28, 1996

                    Christopher W. Aiken



REVIEWED BY QA:                              DATE:     May 28, 1996

                    William J.  Bryan



APPROVAL:                                    DATE:     May 28, 1996

                    John A. Swanson



*_/If a product name is not incLuded in the "first incorrect version"

the full ANSYS program is implied.  For products not listed, this error

does not apply, but see the reverse side for equivalent product

designations.



UnLess noted otherwise, this error report also appLies to all revisions

after the first incorrect one and prior to the corrected revision.  All

revisions after "corrected in" are corrected.  ManuaL corrections are

incLuded in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS revision

identifiers.



             ANSYS[Registered Trademark] CLASS3 ERROR REPORT



                                                  ERROR NO: 96-20



KEYWORDS:      THERMAL   CONVECTION     DELETED FILM COEFFICIENT



DESCRIPTION OF ERROR:



     In a thermal analysis, the conductivity matrix does not get updated

to reflect the absence of a convection surface



if



     1.  either



          A.   NROPT.AUTO [default] is used and no thermal material

               properties are tempterature-dependent and no radiation is

               present;



            or B.  IMPORTANT is used;



and  2.     the film coefficient of a convection surface is deleted in

            the second or later load step (by using either the

            SFDELE/SFABELE/SFEDELE/SFLDELE commands; or resetting the

            film coefficient to zero);



This erroneous conductivity matrix will continue to be used (unless the

film coefficient is again changed to a nonzero value), yielding incorrect

results.



FIRST INCORRECT VERSION(S):*_/               CORRECTED IN:*_/



Rev.  5.1                                    Release 5.3

ANSYS/THERMAL Rev.  5.2                      ANSYS/THERMAL Release 5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Instead of totally removing the film coefficient, simply reduce it

to a very small value.  Alternatively, NROPT,MODI can be used.



COMMENTS:



     Ramping of a film coefficient down to zero in one load step with a

series of substeps is correctly handled.



AUTHOR/CORRECTOR:                            DATE: May 28, 1996

                    Peter Kohnke



REVIEWED BY QA:                              DATE: May 28, 1996

                    William J. Bryan



APPROVAL:                                    DATE:  May 28, 1996

                    John A. Swanson



*_/If a product name is not included in the "first incorrect version",

the full ANSYS program is implied.  For products not Listed, this error

does not apply, but see the reverse side for equivalent product

designations.

Unless noted otherwise, this error report also applies to all revisions

after the first incorrect one and prior to the corrected revision.  All

revisions after "corrected in" are corrected.  Manual corrections are

included in on-line documentation as appropriate.  Please see the reverse

side of this sheet for additional information on ANSYS revision

identifiers.



                             ANSYS QA NOTICE



                                                  NOTICE NO: QA96-04



SUBJECT: CFD FLUID  FLOTRAN   MAGNETIC HARMONIC   COUPLED FIELD



DESCRIPTION:



     If the LDREAD command is used to transfer heat generation rates from

an ANSYS harmonic magnetic analysis to a FLOTRAN analysis, LDREAD fails

to transfer the imaginary portion of the heat generation rate.  Note -

for such cases, the following warning message is produced:



     Invalid KIMG key ( 2 ) for load label HGEN, when using FLOTRAN

     elements

     Valid key is 0.

     The KIMG key is reset to 0.



AFFECTED VERSION:   Rev.  5.2



COMMENTS:



     The Macro flohgen.mac is available on the ANSYS HomePage

(http://www.ansys.com) in the Customer Information Area.  It may be used

to correctly transfer heat generation loads from an ANSYS harmonic

magnetic analysis to FLOTRAN.



AUTHOR:                                 DATE: May 28, 1996

               Mike Normansell



REVIEWED BY QA:                         DATE: May 28, 1996

               William J. Bryan



APPROVAL:                               DATE: May 28, 1996

               John Swanson



Table  "ANSYS 5.1 CLASS3 ERROR SUMMARY BY REPORT NUMBER," 9 Pages

omitted.



Table  "ANSYS 5.2 CLASS3 ERROR SUMMARY BY REPORT NUMBER," 4 Pages

omitted.



*** END OF DOCUMENT ***

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