ML19211B942
| ML19211B942 | |
| Person / Time | |
|---|---|
| Issue date: | 10/24/1979 |
| From: | Rachel Johnson Office of Nuclear Reactor Regulation |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-11, REF-GTECI-RV, TASK-A-11, TASK-OR NUDOCS 8001070215 | |
| Download: ML19211B942 (12) | |
Text
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flgkI gn arag'o UNITED STATES 8 7.,- c [ %
NUCLEAR REGULATORY COMMISSION
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E WASHINGTON. D. C. 20555 g.D I
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OCT 2 4 1979 Generic Task No. A-ll MEMORANDUM FOR:
V. S. Noonan, Chief, Engineering 3 ranch, DDR THRU:
W. S. Hazelton, Section Leader, Engineering Branch, D0R FROM:
R. E. Johnson, Engineering Branch, DOR
SUBJECT:
TRIP REPORT:
CSNI SPECIALIST MEETING OM PLASTIC TEARING INSTABILITY Dates:
September 25 - 27, 1979 Place:
Washington University, St. Louis, M0.
Attendees: See list (Enclosure 1); participation was by invitation.
The writer attended the meeting on Plastic Tearing Instability called by the Committee on the Safety of Nuclear Installations (CSMI) of the OECD Nuclear Energy Agency. Background details can be found in Enclosure 2, copies of the cover and page 3 of the meeting notice.
The technical program is shown here as Enclosure 3.
There were some changes in the final program (some switching and some additions occurred) but they were relatively minor. Rather than include commentary on the program in this Trip Report, anyone interested in specific papers may contact me and we can review notes taken at the meeting.
What may have been the most important part of the meeting was the Conference Summary. The object was to reach conclusions with a view of transmitting them to CSMI as recommendations. Although responsible individuals will no doubt polish the conclusions prior to publishing them, they should be close to the notes I made during the session, given here as Enclosure 4.
By reaching the conclusions, the CSNI specialists have provided advance, international, approval to the thrust of the TAP A-ll final NUREG.
1739 342
[
8001070
OCT 2 4 1979
. The entire technical program, including session chairmen summaries of each session and the meeting conclusions / recommendations, will be published promptly as an NRC NUREG Report.
M W
Richard E. JohnsMn, TAP A-ll Manager Engineering Branch, D0R Enclosures :
1.
Attendees List 2.
Background Details 3.
Technical Program 4.
Notes from Session cc w/ enclosures: See next page 1739 ;43
OCT 2 4 1979 -
cc w/ enclosures:/
S. Hanauer f M. Aycoct/
D. Eisenhut V. Noonan L. Shao J. Stronsnider R. E. Johnson R. Gamble P. Leech P. Kapo R. Klecker W. Hazelton J. Knight P. Check S. Pawlicki W. Regan J. Watt S. Varga P. Randall, OSD C. Serpan, RES Accessions Unit (016)
EB Members 1739 544 OECD/CSNI, WASHINGTON UNIVERSITY IN ST. LOUIS, U.S.A., SEPTEMBER 25-27, 1979 List of Par ^1cicants AUSTRIA Rieger G.
OSGAE, Vienna CANA3A Jannan B
Atomic Energy Control Board, Ottawa Panesar J.C.
Atomic Energy of Canadai Mississauga, Ontario FINLAND Ranta-Maunus A.
Institute of Radiation Prot., Helsinki FRAhCE Bhardari S.
Novatome, Robinson Cheissoux J.L.
C.E.A.
Cinnussaruat a X-Energ. Atom. St. Paul Les Durance Faicy C.
Electricity of France, LaDefense Pintau J.
Ecole Nat'l Super Des Mines, Cedex Pellissier A.
Framatone, Paris Focte R.L.
CEN Saclay, Gif Sur Yvette 011s er P.
OECD, Nuclear Energy Agency, Paris NETF ERLANDS Bakker A.
Potter Damseweg, Al Delft ITALY Conti M.
CNEN, RAD, RSI, IN GIMP, Rome Zampini G.
NIRA, Genova
- Lamain, L.
Commission of the European Communities Joint Research Center, Ispra Establishment, Varese SWEEEN Carlsson J.
The Royal Institute of Technology, Stockholm WESTERN GERMANY Blauel J.G.
Institut fur Festikorper Mechanik, Freiburg Azodi D.
Gesellschaft fur Reaktoricherheit, Koln UNITED KINGDOM Milne I.
Central Electricity Research, Leatherhead Surrey Bevitt E.
UKAEA (SRD) Culcheth Irvine W.H.
UKAEA (SRD) Culcheth Ingham T.
UKAEA (RNL) Risley Fulferd I.
Rolls Royce & Assoc.Ltd., Derby Howard I.
University of Sheffield, Sheffield Rose R.T.
Nuclear Power Company, Cheshire Turner C.E.
Imperial College of Science & Technology, London Garwood S.J.
The Welding Institute, Cambridge 3
(MORE)
USA Albrecht P.
Nuclear Regulatory Commission, Washington DC Johnson R.
Nuclear Regulatory Commission, Washington DC Loss F.H.
Naval Research Laboratory, Washington, DC Gudas J.
David W. Taylor Naval Research, Annapolis, Md.
Wessel E.T.
Westinghouse R&D, Pittsburgh, Pa.
Landes J.
Westinghouse R&D, Pittsburgh, Pa.
Hutchinson J.W.
Harvard University, Cambridge, Mass.
Irwin G.
College Park, Md.
Shih F.
General Electric Co., Schenectady, NY Joyce J.
U.S. Naval Academy, Annapolis, Md.
Merkle J.G.
Union Carbide Corporation, Oakridge, Tenn.
Zahoor A.
Battelle Columbus Lab, Columbus, Ohio Norris D.
Electric Power Research Institute, Palo Alto, Calif.
Bloom J.
Babcock & Wilcox, Alliance, Ohio Chen A.
Sandia Laboratories, Albuquerque Szabo B
Washingtor University in St. Louis, Mo.
Paris P.C.
Washington University in St. Louis, Mo.
1739 346 O
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{ j Q j j g y (Tentative)
COMMITTEE ON THE SAFETY OF NUCLEAR INSTALLATIONS (CSNI) SPECIALIST MEETING OECD NUCLEAR ENERGY AGENCY, Paris, France on Plastic Tearing Instability Hosted by the Center for Fracture Mechanics, Washingen University in St. Louis September 25, 26, 27, 1979 TUESDAY MORNING THEORY AND GENERAL CONSIDERATIONS, A.Pellissier Tanon, Chairman September 25 (1) 9:00 - 9:45 AM J.W. Hutchinson
" FOUNDATIONS OF TEARING INSTABILITY THEORY" 9:45 -10:00 AM Discussion and 5-Minute Break (2) 10:00-10:25 AM W.H. Irvine
" PLASTIC TEARING INSTABILITY-WHAT IS IT?"
(Co-authored with A. Quirk) 10:25-10:30 AM Discussion 10:30-11:00 AM Break (with refreshments)
(3) 11:00-11:25 AM A. Pineau
" STUDY OF INSTABILITY OF GROWING CRACKS USING DAMAGE FUNCTION: APPLICATION TO WARM PRE-STRESS EFFECT" (Authored by F.M.Beremin. )
11:25-11:30 AM Discussion (4) 11:30-11:55 AM R. Denys
" GROSS STRAIN CONCEPT" (Co-authored with W. Soete) 11:55-12:00 N Discussion 12:00-12:15 PM Summary Points, A. Pellissier Tanon, Chairman 12:15-1:30 PM Luncheon TUESDAY AFTERN0ON THEORY AND GENERAL CONSIDERATIONS, J. Carlsson, Chairman SEPTEMBER 25
( 5) 1 : 30 -2:15 PM C. E. Turner
" REMARKS ON UNSTABLE DUCTILE CRACK GROWTH" 2:15 -2:30 PM Discussion and 5-minute Break (6) 2:30 -2:55 PM I. Milne "A TECHNIQUE FOR ANALYZING FRACTURE TOUGHNESS TEST DATA DURING SLOW CRACK GROCH" 2:55 -3:00 PM Discussion (Co-authored with G.G. Chell) 3:00 -3:30 PM Break (with refreshments) 1739 549 TUESDAY AFTERN0ON SEPTEMBER 25 (cont'd)
(7) 3:30 - 3:55 PM J.G. Merkle
" STABLE CRACK GROWTH ESTIMATES BASED ON EFFECTIVE CRACK LENGTH AND CRACK OPENIN
( Co-authored with C.E. Hudson. )G DISPLAC 3:55 - 4:00 PM Discussion (8) 4:00 - 4:25 PM C.F. Shih "AN ENGINEERING ~ APPROACH FOR EXAMINING GROWTH AND STABILITY IN FLAWED STRUCTURES" 4:25 - 4:30 PM Discussion 4:30 - 4:45 PM Summary Points, J. Carlsson, Chairman WEDNESDAY MORNING EXPERIMENTAL RESULTS C.E. Turner, Chairman SEPTEMBER 26 (9) 9:00 - 9:45 AM J. D. Landes
" SIZE AND GE0 METRY EFFORTS ON ELASTIC-PLASTIC FRACTURE CHARACTERIZATION" 9:45 -10:00 AM Discussion and 5-minute break (10) 10:00 -10:25 AM S.J. Garwood
" CRACK GROWTH RESISTANCE - GEOMETRY EFFECTS AND STRUCTURAL PREDICTIONS IN A533B Class I STEEL" 10:25 -10:30 AM Discussion 10:30 -11:00 AM Break (with refreshments)
(11) 11:00 -11:25 AM J. T. Gudas
" ISSUES IN DEVELOPING A PLANE STRAIN J. CURVE TEST PROCEDURE" 11:25 -11:30 AM Discussion (Co-authored with J.A. Joyce and P.Albrecht)
(12) 11:30 -11:55 AM F. Loss "J-R CURVE CHARACTERIZATION OF IRRADIATED NUCLEAR PRESSURE VESSEL STEELS" (Co-authored with B.H. Menke, R.A. Gray, Jr.
11:55 -12:00 N Discussion and J.R. Hawthorne) 12:00 -12:15 PM Sumary Points, C.E. Turner, Chairman 12:15 - 1:30 PM Luncheon WEDNESDAY AFTERN0ON
" EXPERIMENTS AND APPLICATIONS" E.T. Wessel, Chairman SEPTEMBER 26 (13) 1:30 - 2:15 PM A. Pellissier Tanon " TESTING AND APPLICATIONS" 2:15 - 2:30 PM Discussion and 5 minute break (14) 2:30 - 2:55 PM T..
Ingham "THE MEASUREMENT OF DUCTILE CRACK INITIATION" 2:55 - 3:00 PM Discussion 3:00 - 3:30 PM Break (with refreshments)
(15) 3:30 - 3:55 PM R.L. Roche
" FORMULAS GIVING THE J-R CURVE FROM RESULTS OF ONE EXPERIMENTAL TEST" 3:55 - 4:00 PM Discussion (more) i739 350 WEDNESDAY AFTERNOON SEPT. 26th/ Cont'd (16) 4:00 - 4:25 PM G. G. Chell
A SIMPLE METHOD FOR DETERMINING THE DUCTILE INSTABILITY OF CRACKED STRUCTURES' (Co-authored with I.Milne.)
4:25 - 4:30 PM Discussion 4:30 - 4:45 PM Sunnary Points, E.T. Wessel, Chairman THURSDAY MORNING APPLICATIONS G. R. I rwi n, Qa i rrran SEPT. 27th (17) 9:00 - 9:45 AM P. C. Paris FRACTURE PROOF DESIGN 9:45 -10:00 AM Discussion and 5-minute break (18) 10:00 -10:25 AM J.L.Cheissoux
" CONDITION OF STABILITY OF AN AXIAL THROUGH CRACK APPEARING ON PWR SECONDARY PIPING IN REDUCED SCALE (1/10) 10:25 - 10:30 AM Discussion 10:30 - 11:00 AM Break (with refreshments)
(19) 11:00 - 11:25 AM B. Szabo "AN ANALYSIS OF DUCTILE CRACK EXTENSION IN BWR FECNATER N0ZZLES" 11:25 - 11:30 AM Discussion (Co-authorr.d with G.G.Musicco, M.P.Rosscw (20) 11:30 - 11:55 AM A. Zahoor "A PRELIMINARY FRACTURE ANALYSIS ON THE INTE GRITY OF HSST INTERMEDIATE TEST VESSELS" (Co-authored with 11:55 - 12:00 N Discussion P.C. Paris and M.P.Gemez) 12:00 - 12:15 PM Summary Points
,G. R. I rwi n, Chai rman 12:15.1:30 PM Luncheon
-. =
THURSDAY AFTERN0ON SEPT. 27th 1:30 PM Conference Summary Recent work at Washington University Other contributions 1739 351
Enclosure a It was agreed that Summary Statements would be limited to tearing instability and related analytical methods.
General 1.
A single parameter can adequately charaterize crack instability conditions and crack extension (growth).
2.
J is the most general parameter for the above purpose 3.
It is recognized that J can be related to COD and other parameters.
Initiation 1.
The attendees agreed that it is appropriate to attempt to define a practical measurement point for crack extension, such as JIc' 2.
The approaches presented for determining the crack extension parameter are essentially the same.
3.
The details and some limitations of measuring a practical extension point remain to be resclved.
4.
The practical (engineering) point value is a measure of loading or deformation below wnich tearing instability is not expected.
(There was considerable discussion about this point related to the complication of fracture mode change to cleavage.)
Growth 1.
Stable crack growth can be characterized in terms of a single parameter (such as J or the J-R curve), within limitations.
2.
The limitations are those characterizations for plane strain which are associated with similarity of field conditions (in the vicinity of the crack tip) and with avoiding substantial amounts of unloading (such as Hutchinson's conditions for J-controlled growth).
I739 352
2-3.
Those characterizations apply uniformly from small-scale yielding through fully-plastic conditions, within limitations.
4.
For structural steels, cleavage may intervene on the conditions for stable crack growth but currently is expected only in or near the fracture transition temperature range.
Instability of Tearing 1.
The occurrance of tearing instability of cracks can be characterized through the use of the same parameter as that for describing growth and the J-R curve).
(such as Japplied 2.
The crack instability problem can be characterized as the occurrence of a tendency between the driving phenomenon and the material's becoming resisting values of that parameter (such as Japplied tangent to the J-R curve).
3.
The several approaches to instability (such as energy-balance, J-tangency, etc.) are basically the same except for details E extrapolation beyond the recognized limitations.
Micromechanisms 1.
It was agreed that the stufy of micromechanisms (such as the damage function approach and others) can enhance an understanding of fracture processes and of the limitations of current analyses.
1739 353
.