United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9502240156

                         Boeing Computer Services
                         P.O. Box 24346
                         Seattle, WA 98124-0346

February 14, 1995
G-1151-RSO-95-081

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

BOEING    

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

Error notices have been sent to our other former customers.

Very truly yours,


R. S. Orr
Nuclear Administrator
G-1151 M/S 7A-33
(206) 865-6248

Attachment(s): ANSYS Class3 Error Reports 95-01, 95-02 and 95-03


ANSYS (Registered Trademark)  

                         ANSYS, Inc.
                         201 Johnson Road         Telephone 412.746.3304
                         Houston, PA 15342-1300   Facsimile 412.746.9494


                                   February 6, 1995


Dear Class3 Error Recipient:

     Enclosed you will find ANSYS Class3 Error Reports 95-01, 95-02 and
95-03.

                                   Sincerely,

                                   ANSYS, Inc.


                                   Prashant Ambe
                                   Quality Assurance Manager

Enclosure


                  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 component 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.

     PREPPOST       contains relevant errors shown     the full ANSYS
                    for                                product, for
                                                       included pre- and
                                                       postprocessing
                                                       functionality

     ANSYS Component Products is an inclusive term for All component
                                                       products that were
                                                       issued at the
                                                       stated revision
                                                       level(s)

     PC/LINEAR      is equivalent to                   WS/LINEAR at Rev.
                                                       4.4A,
                                                  and  ANSYS/LinearPlus
                                                       starting at Rev.
                                                       5.0A.

     PC/THERMAL     is equivalent to                   WS/THERMAL at Rev.
                                                       4.4A,
                                                  and  ANSYS/THERMAL
                                                       starting at Rev. 
                                                       5.0A.

     PC/MAGNETIC    is equivalent to                   ANSYS/Emag
                                                       starting at Rev. 
                                                       5.0A


            ANSYS (Registered Trademark) CLASS3 ERROR REPORT

                                                       ERROR NO: 95-01

KEYWORDS:    SBCDELE      SBCLIST      EDGE PRESSURES      FLUENCES

DESCRIPTION OF ERROR:

1.   The command "SBCDELE,APSF" deletes edge pressures from associated
     elements in addition to the expected normal pressures.

2.   The command "SBCDELE,KT" deletes keypoint temperature
     specifications, but not fluences.

3.   The command "SBCLIST,KT" does not list specified keypoint fluences
     where no keypoint temperature is specified.

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

Error 1:       Rev. 4.4                      Rev. 5.2
               Component Products Rev. 4.4   Component Products Rev. 5.2
Error 2 & 3:   Rev. 5.0                      Rev. 5.2
               Component Products Rev. 5.0A  Component Products Rev. 5.2

SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

1.   a.   Use SFADELE instead.

     b.   If SBCDELE is already issued, reapply edge pressures previously
          applied directly to elements.  (Edge pressures from transfer of
          line surface loads will be redefined automatically the next
          time solid model boundary conditions are transferred.)

2.   Use BFKDELE instead of SBCDELE,KT.

3.   Use BFKLIST instead of SBCLIST,KT.

COMMENTS:

     The SBCDELE command is not documented in ANSYS Rev. 5.0 and Rev. 5.1
and will not be supported in ANSYS Revision 5.2.


AUTHOR/CORRECTOR:                            DATE:  February 3, 1995
                    F. S. Kelley

REVIEWED BY QA:                              DATE:  February 3, 1995
                    Prashant Ambe

APPROVAL:                                    DATE:  February 3, 1995
                    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.

                                                       FORM SASI-QA25
                                                       DEC 19, 1988


            ANSYS (Registered Trademark) CLASS3 ERROR REPORT

                                                       ERROR NO: 95-02

KEYWORDS:    DOCU      SURF22      SOLID72      SOLID73      PRESSURE

DESCRIPTION OF ERROR:

     Applying pressure loads through SURF22 elements to SOLID72 or
SOLID73 elements produces incorrect results.  This is due to a
theoretical limitation and cannot be corrected in the program.


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

Rev. 5.0                                     Rev. 5.2 Elements Manual


SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     Apply pressures directly on the faces of SOLID72 and SOLID73
elements.


COMMENTS:

     The documentation in the Elements Manual will be changed to reflect
this limitation.


AUTHOR/CORRECTOR:                            DATE:  February 1995
                    Lynne O'Leary

REVIEWED BY QA:                              DATE:  February 3, 1995
                    Prashant Ambe

APPROVAL:                                    DATE:  February 3, 1995 
                    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.

                                                       FORM SASI-QA25
                                                       DEC 19, 1988


            ANSYS (Registered Trademark) CLASS3 ERROR REPORT

                                                       ERROR NO: 95-03

KEYWORDS:    MESH         VOLUME         MIDSIDE NODES


DESCRIPTION OF ERROR:

     A volume mesh (VMESH) with 20-noded brick elements (SOLID90 &
SOLID95) can produce incorrect midside node locations wherever an
individual element spans an arc of more than 30 degrees.

     Improperly located midside nodes could induce singularities or other
undesired behavior in a solution.


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

Rev. 5.0                                Rev. 5.2
Component Products Rev. 5.0A            Component Products Rev. 5.2


SUGGESTED USER ACTION FOR RUNNING ON UNCORRECTED VERSION:

     1.   Limit spanned angle per element to 30 degrees (e.g. ESIZE
          command):

or   2.   graphically verify the locations of midside nodes produced by
          VMESH (e.g. EPLOT).


COMMENTS:

     Generally, individual elements spanning more than 30 degrees should
not be used in areas where high accuracy is desired.


AUTHOR/CORRECTOR:                       DATE:  February 3, 1995
                    F. S. Kelley

REVIEWED BY QA:                         DATE:  February 3, 1995
                    Prashant Ambe

APPROVAL:                               DATE:  February 3, 1995
                    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.

                                                       FORM SASI-QA25
                                                       DEC 19, 1988


*** END OF DOCUMENT ***

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