ML20236E957

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Rev 1 to Documentation of ASME III NA-1140 Review for Piping & Supports
ML20236E957
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 08/10/1987
From: Chow S, Feldman S, Wrucke R
STONE & WEBSTER, INC.
To:
Shared Package
ML20236E952 List:
References
NUDOCS 8710300081
Download: ML20236E957 (29)
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. m ENCLOSURE 3

. TU ELECTRIC COMAIGCHE PEAK STEAM ELECTRIC STATMNE' l M

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DOCUMENTATION OF ASME DI NA-1140 REVIEW FOR PIPING f AND SUPPORTS  ;

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DOCUMENTATION OF l ASME III NA-1140 REVIEW FOR PIPING AND SUPPORTS I

Prepared for TEXAS UTILITIES ELECTRIC COMPANY (TU ELECTRIC)

COMANCHE PEAK STEAM ELECTRIC STATION-UNITS 1 AND 2 by l

W. H. Green /A. J. Cokonis P. J. McQuaid August 10, 1987 Approved by

/ A[ r M N R. R. Wrucke S. C. Chow Project Engineer - Unit 1 Manager Engineering Mechanics Division "A 8$.0b S. M. Feldman '

R. Ryan '

Project Engineer - Unit 2 Assistant Manager i Materials Division d e' d  !

R.'P. K14dse l Project Manager 1

Copyright 1987 l Stone & Webster Engineering Corporation l Cherry Hill Office Cherry Hill, New Jersey j l

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' ' ' TABLE OF CONTENTS c

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Subject- Page DESCRIPTION OF CHANGE iii i

BACKGROUND. 1 j o .l 4 OBJECTIVE 1 1

REFERENCES 1 -)

i CONCLUSIONS 2 DISCUSSION 3 GENERAL 3 ALTERNATES TO THE CODE OF RECORD 3 l)l

1. 1977 EDITION WINTER 1978 ADDENDA 3 Appendix 0 - Rules for Design of Safety Valve Installations. .

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2., 1983 EDITION 5

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NC-3658.2 - Standard Flange Joints at Moderate Pressures and Temperatures NC-3658.3 - ANSI B16.5, Flanged Joints with High-Strength Bolting ND-3658.2 - Standard Flange Joints at Moderate i Pressures and Temperatures ND-3658.3 - ANSI B16.5, Flanged Joints with High-Strength Bolting

3. 1983 EDITION. WINTER 1984 ADDENDA 6 Figure NC-3673.2(b) Flexibility and Stress Intensification Factors Figure NC-3673.2(b) Branch Dimensions Figure ND-3673.2(b) Flexibility and Stress Intensification Factors I Figure ND-3673.2(b) Branch Dimensions
4. 1977. EDITION WINTER 1978 ADDENDA 8 NF-3226 - Through Plate Thickness Tensile Limit I l

(Class 1)

NF-3321.1 - Design Conditions (Class 2 Plate and -

Shell)

Figure NF-3226'.5 (Class 1 Plate and Shell)

XVII-2211 - Stress in Tension (Class-1)

Figure XVII-2211(C) (Class 1, 2, and 3 Linear) 2019-1545405-HC4 i ,

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5. 1977 EDITION WINTER 1979 ADDENDA 9 q 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 l NF-1133 - Intervening Elements in Relation to Juris-dictional Boundaries.

NF-1131.6 - Portion F l l

7. 1980 EDITION 11 XVII-2462 - Minimum Edge Distance
8. 1983 EDITION SUMMER 1983 ADDENDA 12

'NF-3225 - Design of Bolting f NF-3324.6 - Design Requirements for Bolted Joints

9. 1983 EDITION SUMMER 1985 ADDENDA 13 NF-4721 - Bolt Holes .
10. 1974 EDITION WINTER 1975 ADDENDA 14  !

NC-6221 - Minimum Required Hydrostatic Test Pressure

11. 1974 EDITION WINTER 1975 ADDENDA .

15 XVII-2410 - General Requirements (for the Design of Connections and Joints)

12. 1980 EDITION WINTER 1982 ADDENDA 16 NF-3324.5 - Design Requirements for Welds 1

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DOCUMENTATION OF ASME III NA-1140 FOR PIPING AND SUPPORTS-DESCRIPTION OF CHANGE ,

1 1

. Table of Contents Deleted Item 6 in Discussion section. Revised  !

the old Items 7, 8, 9, and 10 into new Items 6,  !

7, 8, and 9. . Added new ' Items 10, 11, and 12.  ;

' Background Clarified background. Editorial clarification -)

in first paragraph. Added second paragraph.

Objective Added References 2 and 3 (CPPP-7, Revision 3 and .t PM-163) to provide the revised scope in the Dis-cussion section.

' References Added References 2, 3, 4, 5, 6, and 7.

Conclusions Deleted second paragraph, which is being ad-dressed by the revised Item 4 in Discussion sec-tion. Consolidated conclusion *for clarifica-tion.

Discussion General. Added editorial clarification. ]

' Discussion Item 1. Added clarification that Item I was not available in the Code of record.

Discussion Item 2. Added clarification that related re-quirements used for requalification are more restrictive.

Discussion Item 3. Revised 1983 Edition into 1983 Edition,

  • 1984 Winter Addenda. Revised the first para-graph to clarify that stress intensification factor (SIF) formulation was not available in the Code of record. An independent review per- ,

formed by S. E. Moore (Reference 4) and Project l Memorandum PM-155 (Reference 5) to meet the re-lated requirements were added. Item 3.d was revised to incorporate PM-155 irto the CPSES  ;

I requalification procedure.

Discussion Item 4. Revised first paragraph'to clarify that the original code-imposed limits on the through-thickness allowable tensile stress had the ef-fect of requiring the designer to increase the weld size to achieve the lower allowable stress. l Later, the Code coassittee recognized that exces-sive weld size would increase the joint's sus-ceptibility to lamellar tearing due to excessive j weld residual stresses. Deleted last paragraph j in Item 4. Revised related requirements in j Item 4 in NF-4000 and NF-5000 to clarify that ij 2019-1545405-HC4 iii  !

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' A the code committee positionf for reasoval of reduced allowables for ,through-thickness stress-is related to lamellar tearing. The addition of surface examination is not related because sur-

' face examination methods are effective only for detecting flaws which come to the surface. Con- ,

sidering this, there are. no related require--

ments.

Discussion Item 6 was deleted. Revised the old Items 7, 8, 9, and 10 into new Items 6, 7, 8, and 9. Added new Items 10, 11, and 12.

Discussion Item 6. Clarified in the first paragraph that this topic was not available in the Code of record. Added References 6 and 7 in Article' NF-1000 of the Related Requirements paragraph.

Discussion Items 7, 8, and 9. Editorial clarifications.

Discussion Added Items 10, 11, and 12.

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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 Vesnel 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 met.

For CPSES ' piping, . the , Code ef fective 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, at 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 not .specified until the later 1980 Code Edition.

(see Item 6 in Discussion). In orde,r 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(f) of the Code of record. Review of all related requirements for these alter-natives to the Code of record was performed to justify their implementa-tion. ,

OBJECTIVE This report dccuments 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 af ter 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."

The report will document compliance with the above paragraph for the alternates to the code of record, which are listed in Sections 2.1 and 2.2 of CPPP-7 and Project Memorandum PM-163 (Reference 3). Related re-quirements (if any) will be defined and identified, and the method of compliance to thee will be explained.

REFERENCES l

1. American Society of Mechanical Engineers Boiler and Pressure i

Vessel Code,Section III, 1974 Edition 1

2. Project Procedure CPPP-7, Design Criteria for Pipe Stress and Pipe Supports, Revision 3, February 23, 1987 2019-1545405-HC4 1 i

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3. Project Memorandum PM-163, CPPP-7 Piping and Pipe Support Code

. 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-untion of Branch Connections, June 8, 1987
6. Project Procedure CPPP-6, Pipe Stress / Support Requalification Procedure - Unit 1, Revision 4, April 8, 1987
7. Project Procedure CPPP-9, Pipe Stress / Support As-Built Pro-cedure - Unit 2, Revision 4, April 8, 1987 CONCLUSIONS ,

i 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 in the _CPSES piping and pipe support requalifica-tion project procedures. As a result, application of all the alternates 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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..' DISCUSSION ,

GENERAL For the purpose of this report, the related requirements specified in ' Paragraph NA-1140(f) are considered to be those 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 o'rder:

  • Article 1000 - Introduction
  • Article 2000 - Materials l
  • Article 3000 - Design  !
  • Article 4000 - Fabrication and Installation i
  • Artic1'e 5000 - Inspection
  • Article 6000 - Testing (NC only)
  • Article 7000 - Overpressurization Protection (NC only)
  • Article 8000 - Nameplates f
  • Subsection NA (or NCA)
  • Appendixes Each of the above areas of the code will be discussed for'the alter-nates with respect to 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 Appendix 0 - Rules for Design of Safety Valve Installations i Appendix 0 first appeared in the Winter 1978 Addenda, and it pro-vides guidance for the design and analysis of the piping components containing safety valves, which was not available ' in ' the Code of j record. It provides the safety valve load computation, the stress I acceptance criteria, and general design considerations for both open 1 and closed safety valve discharge systems. Related requirements in NC/ND-3652 and NC/ND-3643.3(c)(b) of the alternate are consistent with the corresponding paragraphs in the Code of record. The use of this appendix represents an imposition of additional design require- l ments for piping systems with safety valve installations. I i

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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 - Design Appendix 0 refers to paragraphs NC/ND-3652 for the evaluation of .the- reaction force moment (Mb) and subparagraphs 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. restrictive than the Winter 1978 Addenda criteria; therefore, the. related require-ments are met.

Article NC/ND-4000 - Fabrication and Installation 1

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 affectad by this change.

Article NC/ND-8000 - Nameplates, Stamping. and Reports There are no related requirements affected by this change.

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Subsection NA - General Requirements There are no related requirements affected by this change.

Appendixes L There are no related requirements affected by this change.  !

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'. - 2. 1983 Edition i Paragraph NC-365'8.2 - Standard Flange Joints at Moderate Pressures l 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 Pacagraph 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). Related requirements of NC/ND-3658.3 and NC/ND-3673.2(b)-1 in the Code of record used for CPSES requali-fication are more restrictive than the alternates; therefore, re-lated requirements in the altetnates have been set.

Related Requirements? ,

E Article NC/ND-1000 - Introduction There are no related requirements affected by this change.

Article NC/ND-2000 - Materials {

l Paragraphs NC/ND-3658.3 require the use of 1983 S (bolt )

allowable stress, psi) values, since S must be > 20,000 psi. l All selected bolt materials have been checked and in fact l satisfy the criteria in the 1983 Code thus allowing use of this l procedure. i l

Article NC/ND-3000 - Design Paragraphs NC/ND-3658.3 refer to Tables NC/ND-3673.2(b)-1 for I The requirements 3 the evaluation of the pipe to flange welds.

of the Code of record are used for this evaluation, which is more conservative than the 1983 Code for both stress intensifi-cation factors and primary stress evaluation (paragraphs NC/ND-3652 and paragraphs NC/ND-3653.1).

Article 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.

l Article NC/ND-5000 - Examination l

There are no related requirements affected by this change. ]

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.. 4 Article NC/ND-6000 - Testina J t There 'are no related requirements . affected by this change, g ticle NC/ND-7000 - Overpressure Protection-There are no - related requirements affected by this change.

A ticle NC/ND-8000 - Nameplates, Stampina, and Reports There are no related requirements affected by this change.

Subsection NA i There are no related requirements affected by this change. I Appendixes L I

Subparagraphs NC/ND-3658.2 and NC/ND-3658.3, which apply to )

unplified analysis of standard flanges, do not require the q implementation of - Appendix XI. Appendix XI is required for 1 detailed '(nonsimplified) analysis of all types of flanges j (standard and nonstandard). The code of reference can be used .

l for an Appendix XI evaluation.  ;

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3. 1983 Edition Winter 1984 Addenda Subparagraphs NC/ND-3673.2(b) - Flexibility and Stress Intensifica- -]

tion Factors J Figure NC-3673.2(b) Flexibility rad Stress Intensification j Factors (For Branch Connections Only - l Class 2 Piping) "

l Figure NC-3673.2(b) Branch Dimensions Figure ND-3673.2(b) Flexibility and Stress Intensification Factors (For Branch Connections Only -

Class 3 Piping)

Figure ND-3673.2(b) Branch Dimensions j l

The 1983 Edition /1984 Winter Addenda (1983-W84) stress intensification l factors (S, ifs) formulation for run pipe / branch connections was invoked. 1 because SIF for the run pipe end moment loads was not specified in the 1974 Code of record. In the 1974 Code edition, the same SIF was speci-fled for both the branch end and run end, and was less restrictive on the calculated stresses of run pipe.

An independent review (Reference 4) performed by S. E. Moore, concluded that the 1983-W84 SIF formulation for branch connections, butt welds, and l socket welds is 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.

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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 NCf_ND-3000 - Desian-The branch connection intensification formulation of the 1974 1 code was not specified; hence it was necessary to use the later editions. The formulation was completed by additions to the code, in the Suaraer 1979 and Sumser 1980 Addenda. The 1983-W84 j SIF formulation in subparagraph NC/ND 3763.2(b) and related i requirements for branch connections, girth, butt welds, and  ;

circumferential fillet welds for socket welded joints were re- )

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viewed independently by S. E. Moore. The review results . in Reference 4 concluded that the use of 1983-W84 formulation is acceptable, with the exception of General Note (2),' Figures NC/

ND-3763.2(b)-2. Consequently, PM-155 (Reference 5) was issued, .

which provided the additional sargin to obviate this related requirement.

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 - Testina 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, Stampina, 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 related requireme'nts affected by this change. l 1

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i ~4. 1977 Edition - Winter 1978 Addanda 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)

Par'agraph hT-3321.1 - Design Conditions Paragraph NJ-3226 - Through-Plate Thickness Tensile Limit o Figure NF-3226.5 Illustrations of Maximuis Design Stress in

, Throush-Thickness Direction of Plates and Elements of Rolled Shapes (Figure. Deleted)

Invoking these paragraphs deletes the original code requirement to use reduced allowables with through-thickness tensile stress in plates or rolled sections. The original code concern was that high applied through-thickness stress in plates and rolled sections might increase the possibility of lamellar tearing (subsurface splitting of the material parallel to its rolled surfaces). The original i 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 susceptibility to lamellar tearing due to increased weld residual stresses. .

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, redu'ces f the weld size. It recognizes that smaller welds induce less residu-al stress, which can cause lamellar tearing, and that this has a more beneficial ef fect 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 Class 2 and MC and for Class 3 are addressed in subparagraph NF-3391.1 for plate and shell designs, and subparagraph NF-3392.1 for linear designs (see next Item 5). There are no related require-ments affected by this change.

Related Requirements Article NF-1000 - Introduction This article addresses scope, owner's responsibility, bounda-ries, and types of supports and attachments and is not affected by the deletion of a rule for a calculation of a specific type of stress. Therefore, there are no related requirements af-fected by this change.

Article NF-2000 - Materials i

No materials have been added or deleted, nor have there been any changes to the requirements for test coupons, fracture il 2019-1545405-HC4 8 .

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toughness,Lwelding,~or examination, which are directly related

. to through-thickness . properties. Therefore, there are no related requirements affected by this change. ,

Article NF-3000 - Desian No other stress, criteria has been added or deleted in the Win-  :

-ter ~1978~ addenda or later to' compensate for this change. l Therefore, there are no related requirements in this article j 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 I welds with a groove or throat dimension of 1 in. or greater, I requiring surface' examination (magnetic particle or liquid pen-etrant) instead of visual examination. However, the Code com-mittee position for the removal of reduced allowables for -

through-thickness stress is related to lamellar tearing. Sur- l' 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. I Article NF-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.

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Subsection NA There are no related requirements affected by this change.

Appendixes j i

The related requirements in Appendix XVII are addressed auto- {

matica11y by reference in Subsection NF. There are no other requirements in the appendices related to this change. i S. 1977 Edition - Winter 1979 Addenda

, Subparagraph NF-3391.1 - Allowable Stress Limits )

Subparagraph NF-3392.1 - Allowable Stress Limits l See prior discussion on through-thickness stresses. These para-graphs apply to Class 2 and MC plate and shell (NF-3391.1) and lin- {

ear (NF-3392.1) support designs. l 2019-1545405-HC4 9 4

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'6. 1980 Edition .

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-' Paragraph.NF-1133 -' Intervening Elements in Relation to Jurisdic- i tional Boundaries Subparagraph NT-1131.6 - Portion F "c

Intervening elements were introduced into Section III of the ASME Code through Code Case N-199 and the Summer /1978 Addenda 'to allow items ' in the load path to be used when these items met other stan-dards orL were not appropriate for Section III. The appropriate paragraphs of the 1980 Edition were invoked in order .to apply this criteria to the project, which was not available in the Code of

, record. The related ' requirements are incorporated; in' Project y Procedures.CPPP-6 and CPPP-9 (References 6 and 7).

Related Requirements Article NF-1000 - Introduction There . are related requirements. They are contained in para-graphs NF-1111, Owners' Responsibility for Component Supports, and NF-1112, Owners' ' Review. They require that the Owner 1) ensure that the intervening elements are adequately designed; ,

2) provide specific information in the design- specification; and 3) assure that a design report is provided.

1 The method for satisfying these related requirements is con-tained in CPPP-6'and CPPP-9 (References 6 and 7).

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 examination, which are directly related to inter-vening elements. Therefore, there are no related requirements affected by this change.

  • Article ~NT-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 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 NF-8000 - Nameplates, Stamping, and Reports .

There are no related requirements affected by this change.

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. Subsection NA 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 b The paragraph in 1980 Code Edition provides the minimum edge dis-

'tance criteria with requirements imposed on the ultimate strength, material thickness, and bearing stress of the plate holes. The 1974 Code of record empirically prescribed the tabular values, based on the traditional practice of limiting the ratio of edge distance to the bolt diameter between 1.25 to 1.5. The 1980 Code provision was invoked to incorporate 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.

There are no related requirements affected by this changc. .

R_eiated Re tenents Article NF-1000 - Introduction There are no related requirements affected by this change.

Article NF-2000 - Materials I

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 directly related to minimum edge distance criteria. Therefore, there are no requirements directly related to this change.

Article NF-3000 - Desian No other stress criteria has been added or deleted to compen- ,

sate for this change. Therefore, there are no requirements f directly related to this change.

Article NF-4000 - Fabrication and Installation There are no related requirements affected by this change.

Article NF-5000 - Examination l

There are no related requirements affected by this change. 1 i

Article NF-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change. t 2019-1545405-HC4 11 j

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'. Subse.ction NA ,

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There are no related requirements affected by this change.

Appendixes This change . is in Appendix XVII and there are no related re-l- quirements in this or any other appendix affected by this change.

l l 8. 1983 Edition - Sussner 1983 Addenda Subparagraph NF-3225.- Design of Bolting l 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 requirements for bolting design and the raising of the maximum allowable from 0.625 Su to 0.7 Su, the original Winter 1974 Addenda allowable. 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. It also facilitates the use of the newer code ' terminology of design limits and service limits, 1 which has replaced the earlier concept of design and operating conditions.

I Related Requirements {

Article NF-1000 - Introduction i

There are no related requirements affected by this change. j 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, i welding, or examination, which are related to the design of )

bolting. Therefore, there are no related requirements affected by this change.

Article NF-3000 - Desian No other stress criteria has been added or deleted to compen-sate for this change. Therefore, there are no related require-ments affected by this change.

Article NF-4000 - Fabrication and Installation There are no related requirements affected by this change.

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U d q Article NF-5000 - Examination .

There are no related -' requirements affected by this. change.

1 Article NF-8000 - Nameplates, Stampina, and Reports l There are ' no related requirements affected by this change.

Subsection NA , k

'5 There are no relithd , requirements affected by this change.

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Appendixes- q'l 3

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  • s, The related requirements in Appendix 1 are eddressed automati-cally by' specific direction in Trible NF-3225.2-1" of the Code of record. i
9. 1983 Edition - Summer 1985 Addenda- 1 Paragraph NF-4721 . Bolt IMies

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The Code lof record 'in 1974 did not address toles for concrete anchor "

bolts. .In 1974,.thiE paragra'ph-addressed only oversized holes and a

.J

. method of fabricating holes. The Summer 1985 criteria provides e.oie' .l 1

detail on hole sizg ' requirements , provides new criteria for long- 1 i'\

- slotted and short-slotted ho'am, addresses holes for concrete an-U chors ind L holes for no-shear applications, and provides direition t

, \;

ufor use of washers. This newer critaria provides clearer direction g [ and additional coverage .in tiie support designs. There are no tElat " f ed' requirements affecjed by this change. .y% e ,

, 4-t4  ;'

\,' Related Requirements.: I .

(

Article NF-1000 - Introduction ' i I'

_,j *} s The.re are no related requirestant4* affected by tt'is change. >

.. ,h  % t;

& 9 AEticle NF-2000 - Materials' e- p t No materials have been added or deleted nor have there been any

./ f .

r q changes to the subsections c,n test coupons, fracture toughness, g t

\

. welding, c'r examination, which are directly rel:4ted to bolt j hole clearances. Thereti te, there are no related requirements i i

affected by this change.

Article NF 13003 - Deafar!' l x

4 51 "

r b

.) No other strdes criteria has been added or deleted to compen-I, r ')) , f' sate far this, change. Therefore, there are no related require-

'p

[ , 'xi met ta a!?(eU;.ed by this change.

I is. 4 / s  ;

h <

s Article NF-4000 - Fabrication and Inuta11 g ion p  % V

-s There are 'no i related requirements - af fected by this change.

+.

l d

.% 2019-1545405-HC4 13 ',s* '

4 L, ,

4 f' A

I l

Article NF-5000 - Examination There are no related requirements effected by this change.

Article NF-8000 - Nameplates, Stamping, and Reports There are no related requirements affected by this change.

Subsection NA There are no related requirements effected by this change.

Appendixes There are no related requirements affected by this change.

10. 1974 Edition - Winter 1975 Addenda Paragraph NC-6221 - Minimum Required System Hydrostatic Test Pressure The Winter 1975 Addendum revised the minimum postinstallation hydro-static test preesure from 1.5 times to 1.25 times the design pres-l sure, and added a fourth condition in NC-6221(c) to substitute the -

postinstallation test for the reinstallation test of repaired components.- This addendum also clarified that the reinstallation test shall be performed for completed components and appurtenances other than piping.

This alternate to the Code of record was identified to bring Code references consistent with the project test loading and test conditions specified in Section 3.0 of CPPP-7 (Reference 2), There are no other related requirements affected by this change.

Related Requirements Article NC-1000 - Introduction l

There are no related requirements affected by this change.

l Article NC-2000 - Materials Subparagraphs NC-6221(c)(1) and (2) refer to Paragraph NC-2500 for repairs by welding and postweld heat treatment; however,

, NC-2500 contains no changes through the Winter 1975 Addenda related to the changes in NC-6221; therefore, there are no re-lated requirements affected by this change.

Article NC-3000 - Design Test conditions are evaluated in applicable pipe stress analy-sis using the 1974 Edition Winter 1975 Addenda requirements.

l 2019-1545405-HC4 14

p t:

3 y ' Article NC-4000' Fabrication and installation

.There are . no related requirements affected by this change.

Article NC-5000 - Inspection Subparagraph NC-6221(c)(2) refers to NC-5,100 for nondestructive examination - of ~ repairs made to components subjected to the .

tnting requirements; however, NC-5100 contains no changes l through *he Winter 1975 Addenda . related to the changes in

. l NC-6221; therefore, r.here are no related requirements affected ,

by this change.

Article NC-6000 - Testina Subparagraph.NC-6221(a) refers to NC-6111 and NC-6114 for com-ponents and appurtenances required to be tested and for the timing of applicable hydrostatic testing of piping subassen-blies and materials; however, these paragraphs contain no changes. through the Winter '1975 Addenda related to the changes

. in NC-6221; therefore, there are no related requirements af-  !

facted'by this change. 4 i

Article NC-7000 - Overpressurization Protection -

f Subparagraphs NC-6221(a) and (b) refer to NC-7411 for estab-lishing the system design temperature; however, NC-7411 con-tains no changes through the Winter 1975 Addenda related to the changes in NC-6221; therefore, there are no related require-  ;

ments.affected by this change.

Subsection NA There are no related requirements affected by this change.

Appendixes l

There are no related requirements affected 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 i its entirety. Subparagraph XVII-2412 stated, " Connections carrying i calculated stresses, except for lacing, shall be designed to support  !

not less than 6 kips." l l

l l

1 2019-1545405-HC4 15 l l

~

e

, 4

- The welds are designed on an as-loaded basis. There is sufficient

  • inherent conservatism in the calculations using allowables of welds from the Code of record. Deletion of this requirement does not affect the design margin. There are no related requirements affected by this change.

Related Requirements Article NF-1000 - Introduction There are no related requirements affected by this change.

Article NF-2000 - Materials 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 cbange.

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.

Appendixes There are no related requirements affected by this change.

12, 1980 Edition - Winter 1982 Addenda Paragraph NF-3324.5 Paragraph NF-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 NF-3292, NF-3293, NF-3392, NF-3393, and NF-3400; the gen-eral reorganization of Article NF-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.

2019-1545405-HC4 16

~ '

i I

i

. This alternative to the Code of record was invoked because it con-t 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 addition, this alternative to the Code of record recognizes several different permissible weld types absent from the Code of record. There , are no related requirements affected by this change.

Related Requirements l

Article NC-1000 - Introduction There are no related requirements affected by this change.

Article NC-2000 - Materials There are no related requirements affected by this change.

Article KF-3000 - Desian 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 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.

Appendixes There are no related requirements affected by this change.

2019-1545405-HC4 17

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