ML20149J276
| ML20149J276 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/30/1987 |
| From: | Chow S, Fonseca C, Wrucke R STONE & WEBSTER ENGINEERING CORP. |
| To: | |
| Shared Package | |
| ML20149J254 | List: |
| References | |
| 15454-N(C)-007, 15454-N(C)-007-R02, 15454-N(C)-7, 15454-N(C)-7-R2, NUDOCS 8802220339 | |
| Download: ML20149J276 (27) | |
Text
tincJo M E 15454-N(C)-007
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File R4.8 Revision 2 DOCUMENTATION OF ASME III NA-1140 REVIEW FOR PIPING AND SUPPORTS Prepared for TEXAS UTILITIES ELECTRIC COMPANY (TU ELECTR5C)
COMANCHE PEAK STEAM ELECTRIC STATION UNITS 1 AND 2 by W. H. GreerdA. J. Cokonis P. J. McQuaid September 30, 1987 Approved by s
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fog R. R Wrfcke S. C. Chow Project Engineer - Uni: 1 Manager Engineering Mechanics Division F. H. r 5 f
^<A-k C. A. Fonseca R. Ryan Assistant Project Manager Assistant Manager Materials Division C
R. P. Klause Project Manager l
Copyright 1937 Stone & Webster Engineering Corporation Cherry Hill Office Cherry Fill, New Jersey s
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l TABLE OF CONTENTS
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Subject l
DESCRIPTION OF CHANGZ iii BACKGROUND 1
OBJECTIVE 1
REFERENCES 1
CONCLUSIONS 2
DISCUSSION 3
. GENERAL 3'
ALTERNATES TO THE CODE OF RECORD 3
1.
1977 EDITION - WINTER 1978 ADDENDA 3
Appendix 0 - Rules for Design of Safety Valve Installations l
2.
1983 EDITION 5
NC-3658.2 - Standard Flange Joints at Moderate l
Pressures and Temperatures l
NC-3658.3 - ANSI B16.5, Flanged Joints with High-s' Strength Bolting ND-3658.2 - Standard Flange Joints at Moderate Pressures and Temperatures ND-3658.3 - ANSI B16.5, Flanged Joints with High-I Strength Bolting 3.
1983 EDITION - WINTER 1984 ADDENDA 6
i Figure NC-3673.2(b) Flexibility and Stress Intensification Factors (Do/tm3100)(Branch Connec-tions, Buttwelds, and l
Fillet Welds)
Figure NC-3673.2(b) Branch Dimensions Figure ND-3673.2(b) Flexibility and St ress Intensification Factors (Do/tm1100)(Brai:c.h Connec-g tions, Buttwelds, and Fillet Velds)
Figure ND-3673.2(b) Branch Dimensions 4
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1977 EDITION - WINTER 1978 ADDENDA 7
XVII-2211 - Stress in Tension Figure XVII-2111(c) Illustrations of Maximum Design Stress in Through Thickness Direction of Plates and Elements of Rolled Shapes (Figure Deleted)
NF-3226 - Through Plate Thickness Tensile Limit Figure NF-3226.5 Illustrations of Maximum Design Stress in Through Thickness Direction of Plates and Elements of Rolled Shapes (Figure Deleted)
NF-3321.1 - Design Conditions 5,
1977 EDITION - WINTER 1979 ADDENDA 9
NF-3391.1 - Allowable Stress Limits (Class 2 and MC Plate /Shell)
NF-3392.1 - Allowable Stress Limits (Class 2 and MC Linear) 6.
1980 EDITION 10 NF-1133
. Intervening Elements in Relation to Juris-(,,
dictional Boundaries NF-1131.6 - Portion F 7.
1980 EDITION 11 XVII-2462 Minimum Edge Distance 8.
1983 EDITION - SUMMER 1983 ADDENDA 12 NF-3225 - Design of Bolting NF-3324.6 - Design Requirements for Bolted Joints 9.
1983 EDITION - SUMMER 1985 ADDENDA 13 NF-4721 - Bolt Holes l
10.
1974 EDITION - WINTER 1975 ADDENDA 14 NC-6221 - Minimum Required Hydrostatic Test Pressure l
11.
1974 EDITION - WINTER 1975 ADDENDA 14 XVII-2410 - General Requirements (for the Design of Connections and Joints) l, l
12.
1980 EDITION - WINTER 1982 ADDENDA 15 NF-3324.5 - Design Requirements for Welds u
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Discussion Item 9.
Editorial ' corrections in first i
paragraph.
Discussion Item 10.
Complete revision of discussion to reflect the effect of pre-1974 requirements in accordance with Code interpretation III-1-83-96.
Discussion Item 11.
Second paragraph was revised to indi-cate ttst the design margin may be reduced to that inhe. rent in the code design methods 'and allowable'.
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BACKGROUND Safety-related piping and pipe supports on the Comanche Peak Steam Elec-tric Station (CPSES) Units 1 and 2 are designed and constructed to the requirements of the American Society of Mechanical Engineers (ASME) Boil-er and Pressure Vessel Code Section III, Division I, Rules for Construc-tion of Nuclear Power Plant Components (Code) (Reference 1).
Paragraph NA-1140(f) of the Code provides rules for the use of specific provisions within an edition or addendum, provided all related requirements are set.
For CPSES piping, the Code effective date (Code of record) is the 1974 Edition, including the Summer 1974 Addenda.
For pipe supports, the Code of record is the 1974 Edition, including the Winter 1974 Addenda.
Many code requirements for piping and pipe supports, it the time of and as specified within the Code of record in 1974, were either not explicit-ly addressed or were still under development.
For example, since the first issuance of Subsection NF for component supports in the 1974 Code Edition, the requirement of intervening elements in relation to jurisdic-tional boundaries was aot specified until the later 1980 Code Edition (see Item 6 in Discussion).
In order to provide more definitive design requirements and additional Code guidance developed subsequent to the issuance of the Code of record, the design criteria for requalification of CPSES piping and pipe supports, CPPP-7 (Reference 2) invoked specific provisions of later Code editions / addenda, as permitted by NA-1140(;) of the Code of record.
Review of all related requirements for these alter-natives to the Code of record was perf o rmed to justify their implementation.
OBJECTIVE This report documents the results of the review performed in order to assure that the use of specific Code provisions in CPPP-7 (Reference 2) is in conformance with Paragraph NA-1140(f) of the Code, which states:
"Code Editions, Addenda, and Cases which have not become mandatory on the contract date for a component may be used by mutual consent of the Owner or his agent and Manufacturer or Installer on or after the dates permitted by (a) through (d) above.
It is permitted to use specific provisions within an Edition or Addenda provided that all related requirements are met,"
report wil[ document compliance with the above paragraph for the al-The ternates to the code of record, which are listed in Sections 2.1 and 2.2 i
of CPPP-7 and Project Memorandum PM-163 (Reference 3).
Related require-ments (if any) will be defined and identified, and the method of compli-ance to them will be explained.
REFERENCES l
1.
American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section III, 1974 Edition 2.
Project Procedure CPPP-7, Design Criteria for Pipe Stress and Pipe Supports, Revision 3, February 23, 1987 i
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Project Memorandum PM-163, CPPP-7 Piping and Pipe Support Code (O
Applicability Changes, May 27, 1987 4.
Report No. SEM-001-001, ASME Code Stress Intensification Fac-tors for Comanche Peak Steam Electric Station - Units 1 and 2, by S. E. Moore, May 21, 1987 5.
Project Memorandum PM-155, Stress Intensification Factors Eval-uation of Branch Connections, June 8, 1987 6.
Project Procedure CPPP-6, Pipe Stress / Support Requalification Procedure - Unit 1, ?.evision 4, April 8, 1987 7.
Project Procedure CPPP-9, Pipe Stress / Support As-Built Pro-cedure - Unit
- e. Revision 4, April 8, 1987 8.
Piping Erection Specification No. 2323-MS-100, Revision 9, July 9, 1987 CONCLUSIONS The related requirements for the invoked special paragraphs from the lat-er Code editions / addenda have been identified, reviewed, and addressed in Items 1 through 12 of the Discussion section. CPPP-7 incorporated these special paragraphs to provide additional and more rigorous Code guidance.
These alternates represent the mandatory design requirements (with the exception of nonmandatory Appendix 0 in Item 1) of later Code editions, but were not explicity addressed by the Code of record.
All applicable requirements related to these alternates have been imple-mented and incorporated it the CPSES piping and pipe support requalifi-cation' project procedures.
As a
- result, application of all the alte rnates invoked in Sections 2.1 and 2.2 of CPPP-7 and PM-163 are in compliance with of Paragraph NA-1140(f) of the Code of record.
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4 DISCUSSION GENERAL,
For the purpose of this report, the related requirements specified in Paragraph NA-1140(f) are considered to be these contained in the Subsections NC/ND for Piping, NF for supports, NA (or NCA) for gen-eral requirements, and the appendixes of the alternatives of later Code Editions / Addenda Section III.
They will be reviewed and :ad-dressed with respect to the corresponding requirements in the Code of record in the following order:
a Article 1000 - Introduction Article 2000 - Materials Article 3000 - Design Article 4000 - Fabrication and Installation Article '000 - Inspection Article 6000 - Testing (NC only)
Article 7000 - Overpressurization Protection (NC only)
Article 8000 - Nameplates Subsection NA (or NCA)
Appendixes Each of the above areas of the code will be discussed for the alter-nates with respect tw the Code of record identified below.
If there are any related requirements in Section II, Material Specifications, or Appendix I, Materials, they will be discussed under Article 2000.
ALTERNATES TO THE CODE OF RECORD 1.
1977 Edition - Winter 1978 Addenda l
Appendix 0"- Rules for Design of Safety Va.,/e Installstions Appendix 0 first appeared in the Winter 1978 Addenda, and it pro-I vides guidance for the design and analysis of the ?iping components containing safety valves, which was not available in the Code of record.
It provides the safety valve load computation, the stress acceptance criteria, and general design considerations for both open and closed safety valve dischaige systems.
Related requirements in NC/FD-3652 and NC/ND-3643.3(c)(6) of the alternate are consistent with the corresponding paragraphs in the Code of record.
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Related Requirements Article NC/ND-1000 - Introduction There are no related requirements affected by this change.
Article NC/ND-2000 - Materials There are no related requirements affected by this change.
Article NC/ND-3000 - Desian Appendix 0 is used to develop the SRV fluid transient forces.
This appendix refers to Equation (9) of paragraphs NC/ND-3652 for the evaluation of the reaction force moment (Mb) and sub-paragraphs NC/ND-3643.3(c)(6) for the reinforcement of multiple openings.
The Code of record is used to evaluate the above criteria, and the corresponding paragraphs were not less re-strictive than the Winter 1978 Addenda criteria; therefore, the related requirements are met.
Article NC/ND-4000 - Fabrication and Installation There are no related requirements affected by this change.
Article NC/ND-5000 - Examination There are no related requirements affected by this change.
Article NC/ND-6000 - Testing There are no related requirements affected by this change.
Article NC/ND-7000 - Overpressure Protection There are no related requirements affected by this change.
Article NC/ND-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.
Subsection NA - General Requirements There are no related requirements affected by this change.
Appendixes There are no related requirements affected by this change.
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.e 2.
1983 Edition h
Paragraph NC-3658.2 - Standard Flange Joints at Moderate Pressures and Temperatures Paragraph NC-3658.3 - ANSI B16.5 Flanged Joints with High-Strength Bolting Paragraph ND-3658.2 - Standard Flange Joints at Moderate Pressures and Temperatures Paragraph ND-3658.3 - ANSI B16.5 Flanged Joints with High-Strength Bolting The above paragraphs in the 1983 Edition were invoked for this topic because guidance was not provided by the Code of record.
These paragraphs are intended for the simplified analysis of standard flanges (e.g., ANSI B16.5).
y Related Requirements:
Article NC/ND-1000 - Introduction There are no related requirements affected by this change.
Article NC/ND-2000 - Materials Paragraphs NC/ND-3658.3 require the use of 1983 S (bolt allow-s./
able stress, psi) values, siner S must be > 20,000 psi.
All selected bolt materials have be6a checked and in fact satisfy the criteria in the 1983 Code thus allowing use of this procedure.
Article NC/ND-3000 - Design Paragraphs NC/ND-3658.3 refer to Tables NC/ND-3673.2(b)-1 for the evaluation of the stress intensification factors of pipe to flange welds.
The weld stress intensification factor used in the design is discussed in Item 3.
Therefore, the related requirements have been met.
Articlu NC/ND-4000 - Fabrication and Installation This section has no related requirements to NC/ND-3658.3.
Bolting requirements discussed in NC/ND-4720 are identical in both years 1983 and 1974.
I Article NC/ND-5000 - Examination There are no related requirements affected by this change.
Article NC/ND-6000 - Testing There are no related requirements affected by this change.
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Article NC/ND-7000 - Overpressure Protection There are no related requirements affected by this change.
Article NC/ND-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.
Subsection NA There are no related requirements affected by this change.
Appendixes Subparagraphs NC/ND-3658.2 and NC/ND-3658.3, which apply to simplified analysis of standard flanges, do not require the implementation of Appendix XI.
Appendix XI is required for detailed (nonsimplified) analysis of all types of flanges (standard ud nonstandard).
The code of reference can be used for an App e dix XI evaltcstion.
3.
1983 Edition - Winter 1984 Addenda Subparagraphs NC/ND-3673.2(b) - Flexibility and Stress Intensifica-tion Factors Figure NC-3673.2(b) Flexibility and Stress Intensification Factors (Do/tm3100)(For Branch Connections, Buttvelds, and Fillet Welds)
Figure NC-3673.2(b) Branch Dimensions Figure ND-3673.2(b) Flexibility and Stress Intensification Factors (Do/tm3100)(For Branch Connections, Buttwelds, and Fillet Welds)
Figure ND-3673.2(b) Branch Dimensions The 1983 Edition /1984 Winter Addenda (1983-W84) stress intensification factors (SIFs) fo rmulation for run pipe / branch connections was invoked because SIF for the run pipe end moment loads was not specified in the 1974 Code of record.
An independent review (Reference 4) performed by S. E. Moore, concluded that the 1983-W84 SIF formulation for branch connections, butt welds, and fillet welds
.i s acceptable for CPSES piping requalification with one l
exception.
That exception is that the use of General Note 2, Figures NC/ND-3673.2(b)-2 will be less restrictive than the Code of record.
Consequently, Project Memorandum PM-155 (Reference 5) was is-sued, which specified the use of adjustment factors to provide sufficient margin in the calculated stresses and obviate this concern.
Related Requirements:
A ticle NC/NI)-1000 - Introduction J
There are no related requirements affected by this change.
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Article NC/ND-2000 - Materials There are no related requirements affected by this change.
Article NC/ND-3000 - Desian
.The branch connection stress intensification formulation of the 1974 code was not specified; hence it was necessary to use the later editions.
S. E. Moore reviewed the related requirements for the 1983-W84 SIF formulations for branch connections and additionally for girth butt welds and circumferential fillet welds.
The review results, documented in Reference 4, con-cluded the the use of 1983-W84 formulation is acceptable, with the exception of General Note (2), Figures NC/ND-3673.2(b)-2 for the branch connection.
Consequently, PM-155 (Reference 5) was issued to address the related requirements for the branch connection.
The other items, girth butt welds and circum-ferential fillet welds, are addressed in CPPP-7.
Article NC/ND-4000 - Fabrication and Installation There are no related requirements affected by this change.
Article NC/ND-5000 - Examination i;
There are no related requirements affected by this change.
l) i Article NC/ND-6000 - Testing There are no related requirements affected by this change.
Article NC/ND-7000 - Overpressure Protection i
There are no related requirements affected by this change.
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Article NC/ND-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.
Subsection NA There are no related requirements affected by this change, i
Appendixes There are no related requirements affected by this change.
l 4.
1977 Edition - Winter 1978 Addenda Paragraph XVII-2211 - Stress in Tension Figure XVII-2211(c) Illustrations of Maximum Design Stress in Through-Thickness Direction of Plates and Elements of Rolled Shapes (Figure Deleted)
)
Paragraph NF-3226 - Through-Plate Thickness Tensile Limit V
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Figure NF-3226.5 Illustrations of Maxinum Design Stress in
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Through-Thickness Direction of Plates and Elements of Rolled Shapes (Figure Deleted)
Paragraph NF-3321.1 - Design Loadings
{
Invoking these paragraphs deletes the original code requirement to use reduced allowables with through-thickness tensile stress in 4
plates or rolled sections.
The original code concern was that high applied through-thickness _ stress in plates and rolled sections might i
increase the possibility of lamellar tearing (subsurface splitting of the material parallel to its rolled surfaces).. The original Code-imposed limits on the through-thickness allowable tensile stress had the effect of requiring the designer to increase the weld size to achieve the lower allowable stress..Later, the Code commit-tee recognized that excessive weld size increases the joint's sus-ceptibility to lamellar tearing due to increased weld residual tresses.
s The 1977 Edition, Winter 1978 Addenda (1977-W78) code edition for these paragraphs deleted the requirement to reduce the allowable stress in the through-thickness direction. This, in effect, reduces the weld size.
It recognizes that smal.ler welds induce less residu-i al stress, which can cause lamellar tearing, and that this has a more beneficial effect than a larger weld with lower calculated ap-plied stresses.
The above alternates to the Code of record address Class 1 plate and shell and Class 1 linear supports.
Through thickness-stresses for l
Class 2 and MC and for Class 3 are addressed in subparagraph NF-3391.1 for plate and shell designs, and subparagraph NT-3392.1 for linear designs (see next Item 5).
Related Requirements j
Article NF-1000 - Introduction i
This article addresses scope, owner's responsibility, bounda-ries, and types of supports and attachments and is not affected a
by the deletion of a rule for a calculation of a specific type of stress.
Therefore, there are no related requirements af-i facted.by this change.
l Article NT-2000 - Materials i
j' No materials have been added or deleted, nor have there been any changes to the requirements for test coupons, fracture
/
toughness, welding, or examination, which are directly related l
to through-thickness properties.
Therefore, there are no re-lated requirements affected by this change.
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Article NF-3000 - Desian No other stress criteria has been added or deleted in the Win-ter 1978 addenda or later to compensate fo r this change.
Therefore, there are no related requirements in this article affected by this change.
Article NF-4000 - Fabrication and Installation There are no related requirements affected by this change.
Article NF-5000 - Examination The Winter 1978 Addenda of this article is more restrictive for welds with a groove or throat dimension of 1 in, or greater, requiring surface examination (magnetic particle or liquid pen-etrant) instead of visual examination.
However, the Csde com-mittee position for the removal of reduced allowables for through-thickness stress is related to lamellar tearing.
Sur-face examination methods are effective only for detecting flaws which come to the surface. The addition of surface examination requirements to the Code is not related to the deletion of the reduced allowables.
Considering this, there are no related requirements.
Article NF-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.
Subsection NA There are no related requirements af fected by this change.
Appendixes The related requirements in Appendix XVII are addressed auto-matically by reference in Subsection NF.
There are no other requirements in the appendices relsted to this change.
5.
1977 Edition - Winter 1979 Addenda Subparagraph NF-3391.1 - Allowable Stress Limits Subparagraph NF-3392.1 - Allowable Stress Limits See prior discussion on through-thickness stresses.
These para-graphs apply to Class 2 and MC plate and shell (NF-3391.1) and lin-l ear (NF-3392.1) support designs.
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6.
1980 Edition O
Paragraph NF-1133 - Intervening Elements in Relation to Jurisdic-tional Boundaries Subparagraph NT-1131.6 - Portien F Intervening elements were introduced into Section III of the ASME l
Code through Code Case N-199 and the Summer 1978 Addenda to allow l
items in the load path to be used when these items met other stan-dards or were not appropriate for Section III.
Items such as non-pressure retaining portions of ASME III control valves to which 4
ASME III hT supp m s are attached are considered intervening ele-ments.
The spropriate pragraphs of the 1980 Edition were invoked in order to apply this criteria to the project, which was not avail-able in the Code of record.
l Related Requirements Article NF-1000 - Introduction There are related requirements.
They are contained in para-graph hT-1111, Owner's Responsibility for Component Supports, which requires that the Owner 1) ensure that the intervening elements are adequately designed and 2) provide specific infor-mation in the design specification, and in paragraph NF-1112, Owner's Review, which requires that a design verification report be provided.
The method for satisfying these related requirements is con-tained in CPPP-6 and CPPP-9 (References 6 and 7).
Article hT-2000 - Materials No materials have been added or deleted nor have there been any changes to the subsections on test coupons, fracture toughness, welding, or examination, which are direccly related to inter-vening elements Therefore, there are no related requirements affectedbythiYehange.
Article NF-3000 - Design No other stress criteria has been added or deleted to compen-sate for this change.
Therefore, there are no related require-mentr, affected by this change.
Article NF-4000 - Fabrication aad Installation
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There are no related requirements affected by this change, j
Article hT-5000 - Examination There are no related requirements affected by this change.
i Article NT-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.
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Subsection NA i
There are no related requirements affected by this change.
Appendixes There are no related requirements affected by this change.
7.
1980 Edition Paragraph XVII-2462 - Minimum Edge Distance The paragraph in 1980 Code Edition prov des the minimum edge dis-s tance criteria with requirements imposed on the ultimate strength, material thickness, and bearing stress of the plate holes. The 1974 Code of record empirically prescrDed the tabular values, based on the traditional practice of limiting the ratio of edge distance to the bolt diameter between 1.25 to 1.8.
The 1980 Code provision was I
invoked to incorpo ra te the alternates for minimum edge distance, which provides a more rigorous, complete, and precise rule to pre-vent the tear-out failure or excessive deformation of the plate.
g Related Requirements Article NF-1000 - Introduction There are no related requirements affected by this change.
..i Article NF-2000 - Materials No materials have been added or deleted nor have there been any changes to the subsections on test coupons, fracture toughness, welding, or examin: tion. which are directly related to minimum edge distance criteria.
Therefore, there are no requirements directly related to this change.
Article hT-3000 - Design No other stress criteria has been added or deleted to compen-sate for this change.
Therefore, there are no requirements directly related to this change.
Article NF-4000 - Fabrication and Installation There are no related requirements affected by this change.
Article hT-5000 - Examination There are no related requirements affected by this change.
Article hT-6000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change, 2019-1545405-HC4 11 l
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Subsection NA There are no related requirements affected by this change.
Appendixes This change is in Appendix XVII and there are no related re-quirements in this or any other appendix affected by this change.
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8.
1983 Edition - Summer 1983 Addenda Subparagraph NF-3225 - Design of Bolting Subparagraph NF-3324.6 - Design Requirements for Bolted Joints The Summer 1983 Addenda is invoked for the design of bolting to en-able the updated allowable stresses in the 1983 Edition to be used in support designs.
In particular, Appendix F was upgraded by the addition of explicit tension and shear requirements for bolting de-sign for the faulted condition.
Also, for bolts loaded in combined tension and shear, the three straight-line interaction curves of the Winter 1974 Addenda have been replaced by a more precise elliptical interaction curve of the second degree.
The newer code provides a clearer treatment of the subject.
Related Requirements
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Article NT-1000 - Introduction
. _s There are no related requirements affected by this change.
A,rticle NF-2000 - Materials No materials have been added or deleted nor have there been any changes to the subsections on test coupons, fracture toughness, welding, or examination, which are related to the design of bolting.
Therefore, there are no related requirements affected by this change.
Article NF-3000 - Design No o her stress criteria has been adjed or deleted to compen-sate for this change.
Therefore, there are no related require-ments affected by this change.
Article NF-4000 - Fabrication aod Installation L
l There are no related requirements affected by this change.
Article NF-5000 - Examination l
There are no related requirements affected by this change.
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I Article NT-8000 - Nameplates, Stamping, and Reports
<^1 c
There are no related requirements affected by this change.
Subsection NA There are no related requirements affected by this change.
Appendixes The related requirements in Appendix F are addressed automati-cally by specific direction in Table NT-3225.2-1 of the Code of record.
There are no other related requirements affected by l
this change.
9.
1983 Edition - Summer 1985 Addenda Paragraph NF-4721 - Bolt Holes The Code of record in the Wintet 1974 Addenda did not address holes for concrete anchor bolts.
In the Winter 1974 Addenda, this para-graph addressed only oversized holes and a method of fabricating holes.
The Summer 1985 criteria provides more detail on hole size requirements, provides new criteria for long-slotted and short-slotted holes, addresses holes for concrete anchors and holes for co-shear applications, and provides direction for use of washers.
This newer criteria provides clearer direction and additional cover-age in the support designs.
..i Related Requirements
?
Article NT-1000 - Introduction There are no related requirements affected by this change.
4 Article NF-2000 - Materials t
No materials have been added or deleted nor have there been any changes to the subsections on test coupons, fracture toughness, i
welding, or examination, which are directly related to bolt hole clearances.
Therefore, there :re no related requirements affected by this change.
Article NF-3000 - Design No other stress criteria has been added or deleted to compen-sate for this change.
Therefore, there are no related require-ments affected oy this change.
Article NF-4000 - Fabrication _and Installation There are no related requirements affected by this ch nge.
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e-Article NF-5000 - Examination There are no related requirements affected by this change.
Article NF-8000 - Nameplates, Stamping, and Reports i
There are no related requirements affected by this change.
Subsection NA
(
There are no related requirements affected by this change.
Aopendixes There are no related requirements affected by this change.
10.
1974 Edition - Winter 1975 Addenda Paragraph NC-6221 - Mitimum Required System Hydrostatic Test Pressure The Winter 1975 Addendum revised the minimum conipleted system hydro-static test pressure from 1.5 times to 1.25 times the design pres-sure.
This, in ef fect, restored the pre-1974 code requirement of 1.25 times the design pressure as documented in Code Interpretation III-1-83-96.
(
This Code interpretation identifies the Code of Record requirement v
ss an error, the correction of which should have been identified as Errata in the Summer 1975 Addenda.
Therefore, there are no related requirements aff?cted by this change.
11.
1974 Edition - Winter 1975 Addenda Paragraph XVII-2410 - General Requirements (for the Design of Con-nections and Joints)
This paragraph addresses:
types of connections permitted (XVII-2411), minimum design strength of connections (XVII-2412),
provision for eccentric connections (XVII-2413), and placement of bolts and welds (XVII-2414).
Only Subparagraph XVII-2412 was af-fected by the adoption of the Winter 1975 Addenda; it was deleted in its entirety.
Subparagraph XVII-2412 stated, "Connections carrying calculated stresses, except for lacing, shall be designed to support not less than 6 kips."
The welds are designed on an as-loaded basis.
There is sufficient inherent margin in the design using allowables of welds from the Code of record.
Related Requirements Article NF-1000 - Introduction There are no related requirements affected by this change.
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Article NF-20t' - Materials b"
There are no related requirements affected by this change.
Article NF-3000 - Design There are no related requirements affected by this change.
Article NF-4000 - Fabrication and Installation There are no related requirements affected by, this change.
Article NF-5000 - Examination There are no related requirements affected by this change.
Article hT-8000 - Nameplate Stamping and Reports There are no related requirements affected by this change.
Subsection NA There are no related requirements affected by this change.
Appendixes There are no rela r.ed requirements affected by this change.
-(,s) 12.
1980 Edition - Winter 1982 Addenda Paragraph NF-3324.5 Paragraph hT-3324.5 of the 1980 Edition, Winter 1982 Addenda, gives the design requirements for welds on Class 1, 2, 3, and.MC linear type supports.
Prior to this version, this information was given in Paragraphs hT-3292, NF-3293, hT-3392, hT-3393, and NF-3400; the gen-eral reorganization of Article hT-3000 in the 1980 Edition, Winter 1982 Addenda regrouped the design requirements by support type (i.e., plate and shell supports and linear supports) as opposed to Class 1, 2, 3, or MC in the Code of record.
This alternative to the Code af record was invoked because it con-tains a much greater degree of detail in its discussion of allowable stress limits which must be satisfied for design loadings and of rules and stress limits which must be satisfied for Level A through D service test loadings.
In addi*, ion, this alternative to the Code of record recognizes several different permissible weld types absent j
from the Code or record.
(
Related Requirements Article NC-1000 - Introduction
N i
There are no related requirements affected by this change.
%)
2019-1545405-HC4 15 '
Article NC-2000 - Materials There are no related requirements affected by this change.
Article NF-3000 - Design There are no related requirements affected by this change.
t Article NT-4000 - Fabrication and Installation i
There are no related requirements affected by this change.
Article NF-5000 - Examination There are no related requirements affected by this change.
Article NF-8000 - Nameplate Stamping and Reports There are no related requirements affected by this change.
Subsection NA There are no related requirements affected by this change.
I Appendixes
.- s There are no related requirements affected by this change.
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9 04 I
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2019-1545405-HC4 i6'
I E rw:. W '3 PM-229 CTONE O WTCTER ENZINEEZINC C2RPORATICN. CHERRY HILL CPERATIONS CENTER INTEROFFICE MEMORANDUM k*oy 15454/15616 4...
PROJECT KEMORANDUM NO. 229 SUBJECT COMANCHE PEAK STEAM ELECTRIC STATION OATE UNITS 1 AND 2 RPKlauseilav BUTT-VE1.D PIPINC CONNECTIONS FROM DISTORTIONS CRITERIA Job Book M3.1 TO cc Job sook M;.2.7 All CPPP Manual Holders The purpose of this memorandum is to clarify / revise the methodology for evaluating butt-weld piping connection distortions presented in Attachment 3-15 of CPPP-7, Revision 3.
The following items have been revised by this memorandum:
1.
Delete the limitations on the weld reinforcement. Section 4.1, that are not applicable to this procedure.
2.
Clarify Section 4.2 to indicate that if (Ro-Rmin) t, repair / rework of butt-weld connection is required.
3.
Revise Section 5.1 to indicate that the stress intensification value (i) for the as welded condition, will be evaluated on a case specilie basis with approval by the Options Review Coc:mittee (ORC).
4.
Revise Section 6.0 to provide additional reference.
All stress problems affected by this me=orandum shall be reviewed and revised, if necessary, during final reconciliation to meet these criteria.
This memorandum will be incorporated into the next revision of CPPP-7.
7 L R. P. Klause Project Manager Attachment l
PM-229 ATTACHMENT 3-15 i
PAGE 1 0F 4 s
STRESS ANALYSIS TOLERANCES AND QUALIFICATION METHODS FOR ASME III CLASS 2, 3. AND ANSI B31.1 BUTT-VELD PIPING CONNECTION DISTORTIONS 1.0 PURPOSE The purpose of this procedure is to provide a methodology for the quali-fication of pipe weld shrinkage that does not conform to the specifications.
2.0 APPLICABILITY The tolerances and the qualification equations presented herein are ap-plicable to ASMI III, Class 2, 3 and ANSI B31.1 piping.
The qualification equations presented in this procedure are valid subject to the following limitations:
f The stress intensification factor due to piping connection mis-a.
match is not considered in this procedure.
When the mismatch strass intensification factor is greater than 1, it should be premultiplied with the stress intensification factors presented in this procedure.
b.
Local butt-weld imperfections, such as surface defects, thin-ning and repair veld defects, should be within the Code or specification tolerances in order for the allowables of this procedure to be applicable.
1 c.
The bu t-weld connections should not be closer to any other discontinuity or connection than 2/ Dot.
3.0 NOMENCLATURI Do =
Pipe outside diameter (undistorted), in.
(Ro - Rmit)
The difference in pipe outside radii for radial
=
weld shrinkage distortion, in.
P Nominal pipe wall thickness, in.
t
=
i tw
=
Thickness of pipe at the area of reinforcement i
of radial weld shrinkage, in, i
a.0 LIMITATIONS I
The connection may be accepted if reevaluation of the stress results by i
the method of Section 5.0 of this attachmtat shows Code compliance.
Dis-tortions in excess of the following values require repair / rework of the butt-weld connection.
i
)
0387-15616-HC4 i
z
PM-229 ATTACHIfENT 3-15 PAGE 2 0F 4 4.k Radial Weld Shrinkage With Weld Reinforcement (See Figure 1 of this attachment) tv - t 5 3/32 in, for t < 1/8 in.
tw - t 5 1/8 in.
for 1/8 < t i 3/16 in.
tw - t 5 5/32 in, for 3/16 < t < 5/16 in.
tw - t 1 greater of 1/4 in, or (1/8)(W)*
for t > 2 in.
- W = width of butt-weld i
i 4.2 Radial Weld Shrinkage Without Weld Reinforcement (See Figure 1 of this attachment)
(Ro - Rmin) 5 t For (Ro - Rmin) > t repair / rework of the butt-weld connection is required.
5.0 STRESS ANALYSIS INTENSIFICATIONS If the distortion in the butt-weld connection is below the limits delin-eated in Sections 4.1 and 4.2 of this attachment, then the original stress analysis must be reevaluated by utilizing the intensifications presented below.
5.1 Radial Weld Shrinkage ; With Weld Reinforcement (As-Welded Condi-tions)
The as-welded condition stress intensification value (1) will be evalu-ated on a care-specific basis with approval by the Opticas Review Committee (ORC).
5.2 R4 dial Weld Shrinkage - Without Weld Reinforcement For pipe Do/t 5 80, compute the stress intensification factor presented below.
As-Welded i = 2.61 ((Ro - Rmin)/t) + 0.90, but not < 1.0 For Do/t > 80, it is recommended that repair / rework of the butt-weld con-nection be performed.
6.0 REFERENCES
6.1 ASME Boiler and Pressure Vessel Code,Section III, Division 1, Nu-clear Power Plant Components, 1974 Edition including Summer 1974 Addenda, Subsections NC and ND 6,2 ANSI B31.1, 1973 Edition, up to and including Winter 1974 Addenda 6.3.WREG/CR-03 71, ORNL/Sub-2913-9, Dist. Category RS, Stress Indices for Girth Welded Joints Including Radial Weld Shrinkage, Mismatch, 0387-15616-HC4
+
ATTACHMENT 3-15 PAGE 3 0F 4 and Tapered-Wall Transitions, by E. C. Rodabaugh and S. E. Moore, September 1978 6.4 Specification No. 2323-MS-100, Piping Erection Specification l
l 0387-15616-HC4 i
h.--
-PM-229 o
ATTACHMENT 3-15 PAGE 4 0F 4
~
1 TYPE OF l
l STRESS l
l DISTORTION l
LIMITATIONS l
INTENSIFICATION /INDEX l l (refer to paragraph)l (refer to paragraph)
I l
l l
l 1
I l
l Radial weld shrinkage l
l l
lwith weld reinforcement l
l l
l 1
i i
l l
l l
l
'iw l
4,1 1
5.1 I
l l
l I
-$l l
l
,f l n.
R--
l l
l l
1 i
l i
i i
l i
I i
l I
l Radial weld shrinkage l
l l
l(no weld reinforcement) l l
l l
1 I
I I
pf fJ l
I l
I I
1 4.2 i
l y-[
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l t
't l
d l
l 1
I I
i i
i I
I i R.
R -w I
I i
1 1,[57 I
I I
l I
i i
Figure 1 - Buttweld-Related Distortions 0387-15616-HC4 t
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NBQ EgNQEB PLEASE CORRECT NOTED PROBLEM AND RESUBMIT DOCUMENT (S)
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- TO THE DCS, C/O DOCUMENT CONTROL DESK (MAIL STOP 042).
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Sunynary of Audit on 1/21/22/88 450castMW4 February 10, 1988 PDR Local PDR CPPD Reading OSP Reading S. Ebneter/J. Axelrad
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C. Grimes P. McKae J. Wilson J. Lyons R. Warnick M. Halloy A. Vietti-Cook CPPD-LA J. Moore-0GC F. Miraglia E. Jordan J. Partlow D. Terao s
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- JL DATE :2/ f/88
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- 2/4/88
- 2/$ /88 0FFICIAL RECORD COPY u