United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9512040295



                              Information & Support Services

                              P.O. Box 3707

                              Seattle, WA 98124-2207



BOEING



November 27, 1995

G-1151-SJA-95-465



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



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 95-56, 95-57, 95-58, 95-59 and

               ANSYS QA Notice QA95-08



ANSYS [Registered Trademark]



                         ANSYS, Inc.

                         201 Johnson Road         Telephone 412.746.3304

                         Houston, PA 15342-1300   Facsimile 412.746.9494



                                   November 14, 1995



Dear Class3 Error Recipient:



     Attached you will find ANSYS Class3 Error Reports 95-56, 95-57, 95-

58 and 95-59.



     Also enclosed is ANSYS QA Notice QA95-08.  QA95-08 has been issued

to alert users to a situation where incorrect loading input may not be

detected and trapped by the program.



                                   Sincerely,



                                   ANSYS, Inc.



                                   Mark C. Imgrund

                                   Vice President, Corporate Quality



                  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 shown for the full ANSYS product,

                                                  for included pre- and

                                                  postprocessing

                                                  functionality



            ANSYS [Registered Trademark] CLASS3 ERROR REPORT



                                                       ERROR NO: 95-56



KEYWORDS:                MODAL                    DAMPED



DESCRIPTION OF ERROR:



     In a modal analysis using the damped eigensolver (MODOPT,DAMP), the

eigenfrequency results may be incorrect when modeling very stiff, massive

structures using N-kg-mm units (or lb-lbmass-in units in FPS system).



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



Rev. 5.0                                Rev. 5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Use N-kg-m units instead of N-kg-mm (or use lb-lbmass-ft units

instead of lb-lbmass-in).



COMMENTS:



     A typical example of a very stiff, massive structure would be a 1m

long "beam" of 1m x 1m cross-section.



AUTHOR/CORRECTOR:                       DATE:  November 14, 1995

                    C. Rajakumar



REVIEWED BY QA:                         DATE:  November 14, 1995

                    Mark C. Imgrund



APPROVAL:                               DATE:  November 14, 1995

                    David Conover



*_/ 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.



                                                       FORM SASI-QA25

                                                       DEC 19, 1988



            ANSYS [Registered Trademark] CLASS3 ERROR REPORT



                                                       ERROR NO: 95-57



KEYWORDS:                BEAM24              ELEM24



DESCRIPTION OF ERROR:



     For BEAM24 (3-D thin-walled plastic beam element), all results are

incorrect if output quantity THETAP (rotation angle from the element

y-axis to the principal y-axis) is not equal to 0.0 radians together with

either or both of the following conditions:



     1.   The mass matrix is being used (dynamic analyses or

          accelerations).



     2.   The material properties are linear.



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



Rev. 5.0                                Rev. 5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Reorient input of cross-sectional real constants so that THETAP =

     0.0.  This can be done by parameterizing the input using sine and

     cosine functions.



or   For case of condition 2 above, either use BEAM24 with plastic

     material properties using a high yield stress, or use BEAM44.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: November 14, 1995

                    Peter Kohnke



REVIEWED BY QA:                         DATE: November 14, 1995

                    Mark C.Imgrund



APPROVAL:                               DATE: November 14, 1995

                    David Conover



*_/ 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.



                                                       FORM SASI-QA25

                                                       DEC 19, 1988



            ANSYS [Registered Trademark] CLASS3 ERROR REPORT



                                                       ERROR NO: 95-58



KEYWORDS:      GUI       BEAM44         REAL CONSTANTS



DESCRIPTION OF ERROR:



     The real constant dialog box in the GUI for BEAM44 may place real

constant data in the wrong location if all entries are not filled.  This

could then cause calculation of results to be incorrect.



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



Rev. 5.1                                Rev. 5.3

Component Products Rev 5.2              Component Products Rev 5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Specify BEAM44 real constants by typing in the command input window

using R, RMORE or RMODIF commands.  If you use the dialog boxes, enter

values in all data locations.  List the real constants to verify that

they are correct.



COMMENTS:



AUTHOR/CORRECTOR:                            DATE: November 14, 1995

                    Eric P. Clevenger



REVIEWED BY QA:                              DATE: November 14, 1995

                    Mark C. Imgrund



APPROVAL:                                    DATE: November 14, 1995

                    David Conover



*_/ 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.



                                                       FORM SASI-QA25

                                                       DEC. 19, 1988



            ANSYS [Registered Trademark] CLASS3 ERROR REPORT



                                                       ERROR NO: 95-59



KEYWORDS:           SUBSPACE            RIGID



DESCRIPTION OF ERROR:



     If only translational rigid body modes are specified (RIGID command)

in a subspace modal analysis (ANTYPE,MODAL with MODOPT,SUBSP) and there

are rotational DOFs in the model (ROTX, ROTY or ROTZ), modes may be

missed.



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



Rev. 5.0                                Rev. 5.3



SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:



     Remove the RIGID specification and allow the analysis to calculate

the rigid body modes directly.



COMMENTS:



AUTHOR/CORRECTOR:                       DATE: November 14, 1995

                    John Swanson



REVIEWED BY QA:                         DATE: November 14, 1995

                    Mark C. Imgrund



APPROVAL:                               DATE: November 14, 1995

                    David Conover



*_/ 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.



                                                       FORM SASI-QA25

                                                       DEC 19, 1988



                             ANSYS QA NOTICE



                                                  NOTICE NO: QA95-08



SUBJECT:       P-METHOD       MIDSIDE NODES       FORCES



DESCRIPTION:



     Midside nodal forces (F command) are not permitted for p elements.

An error message is issued if this condition is detected.  However, if

the element upon which a midside nodal force exists is excluded (PEXCLUDE

command) no error message is issued.



     To avoid a potential error, perform a model check (CHECK command)

with all elements included (PINCLUDE command).



     When this error is present, the resulting reaction forces will not

sum to the applied loads.



AFFECTED VERSIONS:  Rev. 5.2, ANSYS/Linear Rev. 5.2



AUTHOR:                                 DATE: November 14, 1995

                    Tim Pawlak



REVIEWED BY QA:                         DATE: November 14, 1995

                    Mark C. Imgrund



APPROVAL:                               DATE: November 14, 1995

                    David Conover



                                                       SASI-QA3

                                                       AUG. 29, 1993



*** END OF DOCUMENT ***





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