United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9902190238


Shared Services Group
P.O. Box 3707
Seattle, WA 98124-2207

February 8, 1999

G-1151-SJA-99-75

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,

Sandra J. Andrews
Nuclear Administrator
Phone: (425) 865-6248l
FAX: (425) 865-4851
Mail Stop: 7A-33, or
e-mail: Sandra.J.Andrews@Boeing.com

Enclosure(s): GTSTRUDL PROGRAM REPORT FORM 99.01&99.02


Georgia Institute of Technology GT STRUDL [Registered Trademark]

February 2, 1999

Attention: Nuclear Administrator
Boeing Information & Support Services
P.O.Box 24346, M/S 7A-33
Seattle, Washington 98124-0346

RE: GT STRUDL

Dear Sir or Madam:

Enclosed please find copies of GTSTRUDL PROGRAM REPORT FORM 99.01, 99.02, and a GTSTRUDL QA CUSTOMER ACKNOWLEDGEMENT FORM. Please sign and return the GTSTRUDL QA CUSTOMER ACKNOWLEDGEMENT FORM to acknowledge receipt of the GTSTRUDL Program Report.

Thank you for reviewing the Program Report and for returning the Acknowledgement Form.

Best regards,

CASE Center

David C. Key
Configuration Control Manager

Enclosures

Computer Aided Structural Engineering Center Phone: (404) 894-2260
School of Civil & Environmental Engineering Fax: (404) 894-8014
Atlanta, Georgia 30332-0355 USA casec@ce.gatech.edu


A Unit of the University System of Georgia
GTSTRUDL Program Report Form

GPRF No.:
DATE:
99.01
FROM: Computer-Aided Structural Engineering Center
Georgia Institute of Technology
Atlanta, Georgia 30332-0355
SEVERITY LEVEL:
x URGENT Problem results in incorrect answers which may not be apparent or job aborts and cannot be recovered within the session or job.
SERIOUS Problem results in incorrect answers which are obvious or problem prevents completion of a particular user's task.
MINOR Problem can be worked around or problem poses high frustration factor.
INFORMATIVE Documentation error, program usage tip, user inconveniences.
 
Date Problem Confirmed January 28, 1999
Date Notification Sent
Computers All
Operating System All
Versions: All
Target Release for Correction: 99.01
   Mgr. ASD
Signature Title
 
 
R & D Division
 
Michael H. Swanger
 
Typed or Printed Name Date of Signature
 
 
Signature Title
 
Professional Services Division
 
Typed or Printed Name Date of Signature
 


GTSTRUDL Program Report Form(Continued)

GPRF No.:
DATE:
99.01

DESCRIPTION:

Stiffness analysis reports incorrect reactions under the following circumstances:

1. More than one loading condition is active.
2. At least one active loading condition contains joint loads applied to support joints.
3. A statics check failure occurred for at least one of the active loading conditions.

The incorrect reactions are reported only for the active loading conditions which contain the joint loads applied to support joints.

One work-around is to eliminate the source of the statics check failure(s) if they are caused by some type of structural instability. However, in the event that the statics check failures are due to ordinary computational precision errors, it may be very difficult to eliminate them, in which case another work- around is to perform individual stiffness analyses separately for each loading that caused a statics check failure.

Rev. 2.2


GTSTRUDL Program Report Form

GPRF No.:
DATE:
FROM: Computer-Aided Structural Engineering Center
Georgia Institute of Technology
Atlanta, Georgia 30332-0355
  
SEVERITY LEVEL:
  _ URGENT Problem results in incorrect answers which may not be apparent or job aborts and cannot be recovered within the session or job.
  _ SERIOUS Problem results in incorrect answers which are obvious or problem prevents completion of a particular user's task.
  _ MINOR Problem can be worked around or problem poses high frustration factor.
  _ INFORMATIVE Documentation error, program usage tip, user inconveniences.
Date Problem Confirmed
Date Notification Sent
Computers a/
Operating System A)
Version
Target Release for Correction
 
Signature Title
 
R & D Division
 
Typed or Printed Name Date of Signature
 
 
Signature Title
 
 
Professional Services Division
 
Typed or Printed Name Date of Signature

Rev 2.2


GTSTRUDL Program Report Form(Continued)

GPRF No.:
DATE:

DESCRIPTION:

In the Scope Environment, a window on a plane of finite elements has the following contouring characteristic: when the window contains 10 or less elements, all elements connected to joints in the window are averaged. This leads to erratic results display in a 3-D structure, because elements out of the original plane will be included in the averaging for the contour.

Currently the only work-round is not to view stress contours in a window containing 10 or fewer elements.

Relevant Documentation:

GTSTRUDL User Manual, Volume 3, Section 2.7.14.1


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