ML20203M909

Rev 1 to Duct Installation & Documentation Requirements, Welding Project Generic Employee Concern Evaluation Rept

ML20203M909
Person / Time
Site:	Sequoyah
Issue date:	09/03/1986
From:	Bateman R, Lynskey R, Rose J TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20203M897	List: ML20203M895 ML20203M901 ML20203M904 ML20203M909 ML20203M912 ML20203M916 ML20203M924 ML20203M929 ML20203M931 ML20203M936 ML20203M941 ML20203M944
References
WP-05-SQN, WP-05-SQN-R01, WP-5-SQN, WP-5-SQN-R1, NUDOCS 8609050160
Download: ML20203M909 (21)

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WELDING PROJECT GENERIC EMPLOYEE CONCERN EVALUATION REPORT . ,

REPORT NUMBER: WP-05-SON, R1 . .,

DATE 08-26-86 e

SUBJECT:

DUCT INSTALLATION AND DOCUMENTATION REQUIREMENTS ,

T CONCERN CONSIDERED: IN-85-339-005 '

x PH-85-012-X03 PREPARED B . . mm. 3M % , OC, WP REVIEWED BY .E . h 8/2V85, , OC, WP REVIEWED BY . . A 2I OS , QA, WP 6 0 .

m l

REVIEWED B ,. 'f//Afa7 // / .

, CEG-H, WELDING

// .

APPROVED BY b , PROGRAM MANAGER

~ \ \l l Revision 1 was issued to incorporate comments made by the Senior Review Panel

on 8/19/86 to include a statement of the evaluation results for suitability of service.

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GENERIC EMPLOYEE CONCERN

SUMMARY

SHEET Report Number: WP-05-SON. R1 Report

Title:

DUCT INSTALLATION AND DOCUMENTATION REQUIREMENTS I. CONCERN CONSIDERED: IN-85-339-005 PH-85-012-X03 II. ISSUES INVOLVED

1. EGT piping is too close to wall for adequate access for welding.

2. Welds should be welded and inspected from the inside of the pipe to assure adequacy.

3. Welding and brazing inspection may have been/was deleted from the QA program without adequete justification.

III. STATEMENT OF CONCERN / ISSUE VALIDITY Validity: Y X ,N , Substantiated: Y *X ,N .

• Substantiated for Issues 1 and 2 only. Not substantiated for Issue 3.

IV. EFFECT ON HARDWARE AND/OR PROGRAM None l

V. JUSTIFICATION There were procedures in effect for inspection and documentation of I duct and duct supports during SQN construction. Inaccessability of welds was recognized during SQN construction and appropriate l

corrective measures were taken. Corrective measures were verified by the WP-Reinspection Program.

VI. RECOMMENDATION AND/OR CORRECTIVE ACTION NEEDED None VII. REINSPECTION NEEDED: Y ,N *X .

• Reinspection has been performed on this issue.

VIII. ISSUE CLOSURE By this report.

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WP-05-SQN, R1 IX. ATTACHMENTS

1. Text of the Employee Concern

2. TVA Specification N2M-865 l

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GENERIC EMPLOYEE CONCERN Repott Number: WP-05-SON, R1 Report

Title:

DUCT INSTALLATION AND DOCUMENTATION REQUIREMENTS I. SCOPE OF EVALUATION This evaluation covers the following WBN specific concern deemed to have possible generic implication to SQN:

IN-85-339-005 PH-85-012-X03 II. ISSUES ADDRESSED BY CONCERN

1. EGT piping is too close to wall for adequate access for welding.

2. Welds should be welded and inspected from the inside of the pipe to assure adequacy.

3. Welding and brazing inspection may have been/was deleted from the QA program without adequate justification.

III. CONCERN VALIDITY OR SUBSTANTIATION The EGT (Emergency Gas Treatment) system is a safety-related duct system constructed from spiral-welded pipe.

The WP-SQN Reinspection Program directly investigated the generic '

issues of this concern by the review of a comparable HVAC system.

Complete details are included in the Welding Project SQN Phase II Report. Three welds were investigated in the Containment Purge Air System at SQN. Wolds in this system were chosen because of their accessability, because they are representative of construction techniques used on all duct systems at SQN, and have areas of limited access to the outside diameter due to physical barriers such as walls. These three welds (one 10-inch dia. meter and two 24-inch i diameter) had' inspection windows cut in them to allow direct access to the inside diameter of the duct. In all three cases, it was determined that the inside diameter had been walded in areas where there was no corresponding weld on the outside diameter.

j This, reinspection also confirmed that in all cases the length of weld deposited on the inside diameter of the duct was greater than the l

unwelded length left on the outside diameter of the duct and l effectively overlapped the unwelded area. The weld quality of the

' inside diameter welds were found to be acceptable.

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WP-05-SQN, R1 Further support for the integrity of this duct system is found in the l fact that after the original construction, a satisfactory leak check l was performed on these ducts, thus providing additional evidence that lR1 the joints are welded to provide adequate sealing.

Based on the reinspection of these three weld joints in the Containment Purge Air System, the following conclusions were reached:

1. SQN Construction recognized the problem of accessability on the Containment Purge Air System and implemented a program of welding on the inside diameter of the duct to assure adequate welding in areas of limited accessability on the outsidh diameter.

2. The observed weld quality was acceptable, indicating that the welds were originally inspected during installation.

3. The Containment Purge Air System is not a safety-related system. It is reasonable to assume that at least the same level of quality and

! erection technique, described in items 1 and 2 above, were exercised in safety-related duct systems.

IVA SQN Design Specification N2M-865, " Field Fabrication, Assembly.

Examination, and Tests for Pipe and Duct Systems," was reviewed to determine the requirements for inspection and documentation for duct systems. This specification references SNP Construction Procedure M-27 for field inspection and documentation requirements. Review of SNP Construction Procedure M-23, outlines the inspection and documentation requirements for duct supports. These specifications and procedures establish that there was a program for the inspection and documentation of duct and duct support systems for SQN construction.

TVA is currently evaluating the limited QA program requirements for B31.1 Seismic and Ductwork Systems to determine if program improvements and corrective actions are appropriate. Any program improvements will be used for future construction. Quality Technology Corp (ERT)/NSRS has I performed a preliminary investigation on this issue at WBN.

In summary, Issues 1 and 2 of the subject concerns are substar.tiated due to the following factors.

1. It has been determined by direct inspection that there are areas of spiral weld duct which are not welded on the outside diameter because of the close proximity to walls and other barriers in similar systems.

2. It has been determined by direct inspection that welds have been made and subsequently inspected on the inside diameter of the spiral

, weld pipe where there are corresponding areas which are not welded I on the outside diameter.

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WP-05-SQN, R1 Issue 3 is not substantiated because there was a program in place for welding inspection on ductwork and duct supports during construction at SQN.

There is no hardware effect from i'ssues 1 and 2 due to the fact that this problem was recognized during construction and that measures were taken to correct the problem.

- These issues are closed by this report.

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Attachmtnt 1

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CONCERNS)

Paga 1 of 1 04/8S/86 CEMPLOYEE

~08:54:32

, LOC STATUS RESP -QTC- PPP CFR INSP TC ------CONCERN- -- -

PROBLEM ID 194 EGSG D11 SR IN-85-339-COS WCMMY A_.WORDS: DESIGN CRITERIA SPECIFIC X: W Y: C 2: N WBNP, UNIT #2, EGT PIPING IS GENERICALLY INSTALLED TOO CLOSE TO~ WALL TO PERMIT ADEQUATE ACCESS FOR WELDING. WELDS SHOULD BE WELDED / INSPECTED FROM'INSIDE OF l PIPE TO ASSURE ADEQUACY.

TECHNICAL COMMENTARY:

l ISSUES CONSIDERED: 1.EGT PIPING IS TOO CLOSE TO WALL FOR ADEQUATE WELDING.

2. WELDS SHOULD BE WELDED AND INSPECTED FROM THE INSIDE OF OF THE PIPE TO ASSURE ADEQUACY.

LOC STATUS RESP -QTC- PPP CFR INSP TC ------CONCERN------- PROBLEM

---

------ ---- ----- --- --- ---- -- ID SR PH-BS-012-XO3 WCPIF KEYWORDS: INSPECTION PROGRAM CRITERIA DUCT X: W Y: C 2: Y i

WELDING AND BRAZING INSPECTION OF SAFETY-RELATED HUAC DUCTWORK WAS DELETED SUBSEQUENT TO 1981 FROM THE QA PROGRAM WITHOUT ADEQUATE JUSTIFICATION. WATTS I BAR UNITS 1 & 2, SAFETY RELATED DUCTWORK. ADDITIONAL DETAILS ARE AVAILABLE l IN FILE.

l TECHNICAL COMMENTARY:

, , JE CONSIDERED: WELDING AND BRAZING INSPECTION MAY HAVE BEEN/ WAS DELETED FROI l

THE QA PROGRAM.

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• Attachment 2

' - Pr.go 1 of 14 i

C TENNESSEE VALLEY AUTHORITY DIVISION OF ENGINEERING DESIGN l

l SEQUOYAH NUCLEAR PLANT l

i CONSTRUCTION SPECIFIC ATIO N NO. N2M-865 FOR FIELD FABRICATION, ASSEMBLY EXAMINATION, l

i I

AND TESTS FOR PIPE AND DUCT SYSTEMS LC -

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R2 R3 R4 R5 REVISION

• R1 l

1 Dain July 18, 1974 4/7/76 10/5/76 4/12/77 _

SPON O E. Merri M7; & g/g SUBMITTED M. N. Bressler M(

l CONCURRED RECOMMENDEO (Sponsor Branch Chief) D. R. Patterson , ,

SPEC. CONTR O L P. L. Duncan g' '

g [ (

APPROVED (Dir.of Construction)

H. H. Mull gy,hp gg, g 3

APPROVED l

l k- (Dir. of Eng. Dson.)

D* B* N'*V b'N Mlll $6'li!

Tape No. 62-03

• Signatures appearing on original signed cover sheet.

TVA 10574A (DED-2 75)

Attcchmint 2 Paga 2 cf 14 REVISION LOG FIELD FABRICATION, ASSEMBLY EXAMINATION, Title : AND TESTS FOR PIPE AND DUCT SYSTEMS, N2M-865

" *E,*,' " DESCRIPTION OF REVISION Ap ved 0 See Preface. ,

7/18/74 1 New cover sheet, complete rewrite (see Preface). 4/7/76 2 Revised to add Addendum II as requested by Sequoyah Nuclear 10/5/76 Plant personnel by reply memorandum MC-466.

3 Revised to add Addendum III. 4/12/77 (e

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TVA 10534 (DED.9-73) l l . . . . _ . . . - _ _ _ . _ _ _ ., _ _ _ _ _ . . ___ _ _ . . _ _ _ _ . _ __

Attcchm:nt 2 Pegs 3 of 14 FIE'D FABRICATION, ASSEMBLY EXAMINATION, N2M-865 AND TESTS FOR PIPE AND DUCT SYSTEMS

.C TABLE OF CONTENTS Page No.

1.0 PURPOSE AND SCOPE . . ... .. . ........... ... 1 2.0 ABBREVIATIONS . ... . . . . . .... . ........ .. 1 3.0 DEFINITIONS . . ... .. . . . . . .. ... ... .. ... 1

4.0 REFERENCES

. . . . . . . . . . . ......... ...... 2 5.0 REQUIREMENIS FOR FIELD INSTALLATION OF PIPE AND DUCT SYSTEMS . .. .... . ..... ... . . . . ... . 3 6.0 CLASSIFICATION OF SYSTEMS . .. .. ...... ... ... . 5 ADDENDUM I .... .. ..... . . ... ......... ... 6 .

ADDENDUM II . . . . . .. ... . . . ... ... ...... ... 7 ADDENDUM III. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 TVA 10535 (EN DES-2 77) 1

a Attcchm:nt 2 Paga 4 cf 14 FIELD FABRICATION, ASSEMBLY EXAMINATION, AND TESTS FOR PIPE AND DUCT SYSTEMS N2M-865 PREFACE N2M-865. Rev. O This specification was formerly a portion of appendix E to the Sequoyah Nuclear Plant Quality Assurance Manual. This Revision 1 is being issued as Sequoyah Project CJnstruction Specification N2M-865, Rev. O, retyped with minor non-technical changes and rearrangement of content. The extensive rewrite of code requirements which were incorporated in Rev. O of appendix E have been dropped, as well as references to codes covering procurement of equipment such as valves.

All references to design have been extracted and will be covered elsewhere.

N2M-865, Rev. 1 l

This Rev.1 to N2M-865 is being issued for the purpose of updating references to reflect current installation requirements at Sequoyah Nuclear Plant and to i add definitions pertinent to site activities.

This specification has been reviewed for adequacy by responsible personnel in the Division of Engineering Design - Thermal Power Engineering and Design Projects and Division of Construction - Sequoyah Nuclear Plant; all comments have been resolved. Separate specifications will be issued for special con-C. '

siderations as required.

l TVA 10535 (DED 5 74) g

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. Attrchment 2 Pcg3 5 cf 14 FIELD FABRICATION, ASSEMBLY EXA!HNATION, AND TESTS FOR PIPE AND DUCT SYSTEMS N2M-865 1.0 PURPOSE AND SCOPE The purpose of this specification is to define the requirements for field fabrication, assembly, examination, and testing of pipe and duct systems at Sequoyah Nuclear Plant. Material or procurement requirements for pipe and duct systems are not covered by this specification.

Where conflicts exist, they shall be brought to the attention of the Nuclear Standards and Materials Section within DED-MEB.

2.0 ABBREVIATIONS 2.1 OEDC - Office of Engineering Design and Construction 2.2 DED - Division of Engineering Design 2.3 DEC - Division of Construction 2.4 MEB - Mechanical Engineering Branch (in DED) 3.0 DEFINITIONS 3.1 System - Consists of pipe, duct, fittings, valves, controls, fans, pumps, pressure vessels, tanks, accessories, supports, and res raints required to perform a specific function associated with the production and control of thermal energy from nuclear fuel.

3.2 Installation - Consists of those actions required to place and attach piping, duct, and components to their support structures and to join piping, duct, components, and appurtenances of a nuclear power system in the field by welding or other mechanical means.

3.3 Component - A piece of equipment such as a vessel, tank, piping system, pump, fan air handling unit (AHU), chiller, or valve which will be i combined with other components to form an assembly.

3.4 Assenbly - A combination of subassemblies or components, or both, fitted together to form a unit.

l 3.5 Material - Items which are manufactured to a material specification'.

3.6 Part - An item which has work performed on it and which is attached to and becomes a part of a component before completion and stamping of the-component.

l 3.7 Piping Subassemblies - Sections of a piping systec consisting of fittings and pipes or tubes which are fabricated as subassemblies in a

( shop or in the field before they are installed in a nuclear power system.

(' A piping subassembly consists of a minimum of two pieces of piping joined by a circumferential weld or mechanical joint.

TvA los3s (oto.s.74) ,

. Attrchment 2 Pcgo 6 cf 14 '

( . .

FIELD FABRICATION, ASSEMBLY EXAMINATION,

. AND TESTS M R PIPE AND DUCT SYSTEMS N2M-865 3.8 Owner - As used in this specification, refers to the organization responsible for the operation, maintenance, safety, and power generation of the nuclear power plant. For the purposes of work in accordance with this specification, the Owner's responsibilities have been delegated to TVA-0EDC.

3.9 Manufacturer - Organization or combination of organizations which construct (see,3.10) any class of component, part, or appurtenance to meet a design specification.

'3.10 Installer - As used in this specification, refers to an organization which installs and joins components, piping subassemblies, and appur-tenances in the field. For purposes of work in accordance with this specification, TVA-DEC is the Installer.

3.11 construction - As used in this specification, is an all-inclusive term comprising materials, design, fabrication, eynmination, testing, inspection, and certification required in the manufacture and installa-tion of components, parts and appurtenances.

3.12 Component boundary - As used in this specification, the boundaries of a component to which piping is attached shall be the boundary not -

closer to the main shell of a vessel, pump, or valve thant 3.12.1 The first circumferential joint in welded connections (i.e. the veld ' -

prep); 'the connr.cting veld shall be considered part of the piping.

3.12.2 The face of the first flange in bolted connections; the bolts shall be considered part of the piping.

3.12.3 The first joint in threaded connections.

4.0 REFERENCES

4.1 ASME Boiler and Pressure Vessel Code .

4.2 ANSI Standards 4.2.1 ANSI B31.1 - Power Piping 4.2.2 ANSI B31.5 - Refrigeration Piping 4.2.3 ANSI B31.7 - Nuclear Power Piping 4.3 SMACNA Righ Velocity Duct Construction Standards 4.4 SMACNA Low Velocity Duct Construction Standards

%.5 Applicable TVA General Construction Specifications 4.5.1 G-29 i

" Process Specifications for Welding, Heat Treatment, Nondestruc-l tive Examination, and Allied Field Fabrication Operations." (_

l l TvA 10535 (DEO 5 74 2-

Attcchment 2 Pcgo 7 of 14

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FIELD FABRICATION, ASSEMBLY EXAMINATION, AND TESTS FOR PIPE AND DUCT SYSTEMS N2M-865 C

4.5.2 G-37 " Testing and Balancing of Heating, Ventilating, and Air Conditioning Systems." .

4.6 TVA Design Criteria 4.6.1 SQN-DC-V-3.0 " General Design Criteria for the Classification of Piping, Pumps, Valves, and Vessels."

4.6.2 SQN-DC-V-3.2 " General Design Criteria for the Classification of Heating, Ventilating, and Air Conditiong Systems."

4.7 ASTM A211 - Specification for Special Welded Steel or Iron Pipe i

5.0 REQUIREMENTS FOR FIELD INSTALLATION OF PkPE AND DUCT SYSTEMS The requirements pertaining to installation, testing, inspection, stamping, and certification shall be in accordance with the rules applicable to the TVA classification and type of component involved.

Paragraph 3.12 defines the boundary of jurisdiction. When joining piping and components of different classifications or components which have been manufactured under different code editions.and addenda, the ,

more restrictive requirements shall govern.

The following codes and standards govern the installation and erection .

'of TVA pipe and duct systems. In some cases design drawings and specifications may contain additional requirements applicable to a specific component or system.

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Attachment 2

" HELD FABRICATION, " ASSEMBLY EXAMINATION, - Pago 8 cf 14 AND TESTS FOR PIPE AND DUC" SYSTEMS N2M-865 Design for (

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TVA Seismic Class Loading Applicable Codes and Standards A Yes 1. ANSI B31.7 (1969) and 1970 Addenda, Class I*

B Yes 2. ANSI B31.7 (1969) and 1970 Addenda, Class II*

C/D*** Yes 3. ANSI B31.7 (1969) and 1970 Addenda, Class III*

G Yes 4. ANSI B31.1.0 (1967) issued July 26, 1967.

H No 5. ANSI B31.1.0 (1967) issued July 26, 1967, witn NDE of butt welds per ANSI B31.1.0C, 1972.**

J No 6. ASME Boiler and Pressure Vessel Code,Section I, 1968 Edition through Winter 1969 Addenda, inclusive.

K/L Yes/No 7. Unclassified, to be specified on applicable drawings.

M/N Yes/No 8. ANSI B31.5 (1967),1968 Addenda.

Q Yes 9. Round Duct, Steel, Spiral, or Longitudinal Welded Seam, ASTM A 211, SMACNA High Velocity Duct Construction Standards, Secona Edition,1969, and ANSI B31.1.0 (1967).

R No 10. Round Duct, Steel, Spiral, or Longitudinal Locked or Welded Seam, SMACNA High Velocity Duct Construction Standards, Second Edition, 1969, and ANSI B31.1.0 (1967).

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S/T Yes/No 11. SMACNA High Velocity Duct Construction Standards, Second Edition, 1969.

U/V Yes/No 12. SMACNA Low Velocity Duct Construct:fon Standards, Fourth Edition, 1569.

General Construction Specification "G-29" contains process specifications which define and shall be used to meet the TVA requirements for fabri-cation in accordance with the ASME, AWS, ANSI, or other codes or standards referenced therein. "G-37" shall be used for testing and balancing heating, ventilating and air conditioning syatems.

All welding used in construction of TVA classes Q, R, S, T, U, and V shall be in accordance with G29M or G29C procedures.

• B31 Case 115 December 1973 - Accepts Rules of Section III of ASME Boiler and Pressure Vessel code as complying with the requirements of B31.7 - 1969 and applicable addenda for the respective class of construction. Use of portions of later edition and addenda of any code or standard listed in section 5.0 or of portions of ASME Section III must be approved by the Nuclear Standards and Materials Section of DED-MEB. Approvals shall be issued as addenda to this specification.

• • Refer to memorandum R. H. Dunham to G. G. Stack dated February 23, 1973, Contract 69C60-64422.

• • • Due to changes in ANS safety classification there is no difference between TVA Class C and TVA Class D.

I TvA 10535 (DED S 74

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Attcchment 2 Pcgo 9 cf 14

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FIELD FABRICATION, ASSEMBLY EXAMINATION, AND TESTS FOR PIPE AND DUCT SYSTEMS N2M-865 6.0 CLASSIFICATION OF SYSTEMS The codes and standards listed in section 5.0 of this specification do not provide guidance in the selection of the class of components fcr a specific system. Such guidance is derived from systems safety criteria applicable to specific types of nuclear power systems as specified in engineering standards or as may be required by regulatory authorities.

6.1 Pipe and Duet Lines Applicable physical piping and duct drawings should be referred to for exact limits of system classification. Refer to SQN-DC-V-3.0 and SQN-DC-V-3.2 for guidance.

6.2 Instrument Sensing, Sampling, and Radiation Monitoring Lines Lines that are part of the reactor coolant pressure boundary, greater than 3/8-inch inside diameter and not isolated from the main process piping by a 3/8-inch or smaller orifice, are to be TVA Class A. All other lines attached to a TVA Class A fluid syster boundary are TVA Class B out to and from (but not including) the associated instrument, and/or to and including the first normally closed valve.

Lines attached to TVA Class B fluid" system boundaries are TVA Class B;

( , lines attached to Class C, D, M, Q, or,S boundaries are TVA Class C ,

to and from (but not including) the associated instrument, and/or to and including the first normally closed valve.

Lines and valves forming a part of primary containment isolation are to be TVA Class B.

Lines other than those described should be TVA Class G within seismic structures and TVA Class H in nonseismic structures.

TVA 10535 (DED 5 74) .$.

N2M-865 Attcchment 2 Pago 10 cf 14 ,

ADDENDUM I ,

Refer to footnote in section 5.0.

4 Site Inquiry:

May the rules of ANSI B31.7c-1971 addenda, paragraph 1-723, regarding materials identification and certification be used in lieu of these cpecified in ANSI B31.7 (1969) and 1970 addenda.

DED-MEB Answer:

It is permissible to use the rules of ANSI B31.7c-1971 addenda, paragraph 1-723, for materials identification and certification at Sequoyah.

PROPOSED C b i .

APPROVED "MW " .

M. N. Bressler Principal Engineer, Nuclear Standards and Materials Section, DED-MEB

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Attcch: nt 2

.. gy ' - PC83 11 Cf 14 FIELD FABRICATION, ASSEMBLY EXAMINATION, AND TESTS FOR PIPE AND DUCT SYSTEMS N2M-865 ADDENDUM II CERTIFICATION REQUIREMENIS'FOR MATERIALS FOR SUPPORTS, ATTACHMENTS, AND RESTRALNTS Refer to footnotes in section 5.0.

Site Inquirv:

May the interpretations noted in the following references be utilized for determination of traceability and documentation requirements ?

1. Memorandum from R. G. Domer to R. H. Dunham, dated August 17, 1976, subject - Sequoyah Nuclear Plant - Traceability of Materials and Examination Requirements for Component Supports.

2. Memoranda from R. G. Domer to R. H. Dunham, dated April 20, 1976, and May 21,1976, subject - Watts Bar and Later Nuclear Plants - Traceability of Material and Examination Requirements for Component Supports.

3. Memorandum from D. R. Patterson to R. M. Pierce, dated September 5, 1975, subject - Sequoyah Nuclear Plant Units 1 and 2 - Certification Requirements for Integral Attachments and Component Standard Supports for TVA Class A,

'(' , , B, C, and D Piping - SQN-68A.

EN DES-MEB Answer:

We agree with application of the requirements discussed in the above documents, as modified and outlined below, to activities at Sequoyah:

A. Materials used for permanent attachmen'ts to Class A and B piping require CMTR's, heat number traceability, and identification. Refer to ASME Section III, 1974 edition through Summer 1976 addenda, paragraphs NA-3766.6, NB-2130, NB-2150, NB-4431, NC-2130, NC-2150, and NC-4431.

B. Materials used for permanent attachments to Class C and D piping require CMTR's and heat number traceability. Heat number traceability and material idenfification shall be in accordance with the requirements of the applicable material specification. Refer to ASME Section III, 1974 edition through Summer 1976 addenda, paragraphs NA-3766.6, ND-4431, ND-2190, and ND-2130.

C. Temporary or minor permanent attachments shall be as specified in ASME Section III,1974 edition through Summer 1976 addenda, paragraphs NB-4435 (TVA Class A), NC-4435 (TVA Class B), and ND-4435 (TVA Class C and D).

Materials used may be of noncertified material providing the requirements of these paragraphs are met. Materials identification shall be in accordance with NB-2150, NC-2150, and ND-2150 as applicable.

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TVA 10535 (OED 5 74) ,7, I

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Pcgs 12 of 14 4- FIELD FABRICATION, ASSEMBLY EXAMINATION, AND TESTS FOR PIPE AND DUCT SYSTEMS N2M-865-ADDENDUM II CERTIFICATION REQUIRDfENIS M)R MATERIALS FOR SUPPORTS, ATTACHMENTS, AND RESTRAINTS Refer to footnotes in section 5.0.

Site Inquiry:

May the interpretations noted in the following references be utilized for determination of traceability and documentation requirements ?

1. Memorandum from R. G. Domer to R. H. Dunham, dated August 17, 1976, subject - Sequoyah Nuclear Plant - Traceability of Materials and Rummination Requirendents for Component Supports.

2. Memoranda f am R. G. Domer to R. H. Dunham, dated April 20,.1976, and May 21,19M, subject - Watts Bar and Later Nuclear Plants - Traceability of Material and Examination Requirements for Component Supports.

3. Memorandum from D. R. Patterson to R. M. Pierce, dated September 5, 1975, subject - Sequoyah Nuclear Plant Units 1 and 2 - Certification Requirements

' for Integral Attachments and Component Standard Supports for TVA' Class A, B, C, and D Piping - SQN-68A.

EN DES-MEB Answer:

We agree with application of the requirements discussed in the above documents, as modified and outlined below, to activities at Sequoyah:

A. Materials used for permanent attachmen'es to Class A and B piping require CNIR's, heat number traceability, and identification. Refer to ASME

- Section III, 1974 edition through Sunsner 1976 addenda, paragraphs NA-3766.6, NB-2130, NB-2150, NB-4431, NC-2130, NC-2150, and NC-4431.

B. Materials used for permanent attachments to Class C and D piping require CNTR's and heat number traceability. Heat number traceability and material idenfification shall be in accordance with the requirements of the applicable material specification. Refer to ASME Section III, 1974 edition through Sununer 1976 addenda, paragraphs NA-3766.6, ND-4431, ND-2190, '

and ND-2130.

C. Temporary or minor permanent attachments shall be as specified in ASME Section III,1974 edition through Summer 1976 addenda, paragraphs NB-4435 (TVA Class A), NC-4435 (TVA Class B), and ND-4435 (TVA Class C and D). -

Materials used may be of noncertified material providing the requirements of these paragraphs are met. Materials identification shall be in accordance with NB-2150, NC-2150, and ND-2150 as applicable.

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TVA 10535 (DED 5 74) ,7,

r-Attcenment 4

• EIELD FABRICATION,' ASSEMBLY EXAMINATION, -

Pego 13 of 14 AND TESIS FOR PIPE AND DUCT SYSTDd.S N2M-865 D. Component Standard Supports as defined in ASME Section III,1974 edition through Susumer 1976 addenda shall require certification of compliance to MSS SP-58 and/or the TVA specification. Require nents for items such as gaskets, seals, springs, compression end plates, bearings, retaining rings, washers, wear shoes, hydraulic fluids, etc. shall be in accordance with ASME Section III, 1974 edition through Sununer 1976 addenda, subparagraphs NF-2121. The component support Manufacturer shall provide a list of such materials. These materials do not require Materials Manufacturer's COC's.

E. Material for pipe rupture restraints and jet impingement sleeves that are not a part of the fluid pressure boundary shall be marked with the specification number and grade in accordance with the requirements of the applicable material specification, or else a control procedure shall be employed and certificate of compliance issued which ensures that the specified materials are used.

4 Proposed 4/e e Approv M. N. Bressler 4r=

Principal Engineer,' Nuclear

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, Standards and Materials Section.

EN DES

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I TVA 10535 (DED 5 74) 8-

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Pcg2 14 cf 14 FIEID FABRICATION, ASSEMBLY EXAMINATION' N2M-865 AND TESTS FOR PIPE AND DUCT SYSTEMS ADDENDUM III CIARIFICATION Of REQUIREMENTS FOR CLASS U AND V DUCTS AND HANGERS AND OPERABLE / INOPERABLE DUCTS Site Inquiry

Please clarify the following:

1. Requirements for installation and documentation of supports on TVA Class U and V ducts.

2. Definition of ducts which are identified on system drawings as " operable" or " inoperable."'

EN DES-MEB Answert ,

I. Examination and documentation for safety related HVAC piping and duct-work and all supports (Seismic Category I and dead load) located in a Seismic Category I building shall be limited to the following A. Field inspection to insure conformance to design drawings which may be accomplished by completa documentation as outlined in_ Sequoyah

(- N.P. Construction Procedure M-27, Attachment A, Revision 0.

B. Certificate of compliance for all structural steel required for fabrication of supports and restraints and compliance with drawings.

Material traceability for fabrication of HVAC piping and ductwork is specifically excluded except when required for TVA Classes A, B, C, or D.

II. All HVAC piping and ductwork designated operable (OPER) is essential co the operation of safety related systems and is supported in accordance to Seismic Category I requirements (horizontal and vertical loads).

Systems in Category I building not indicated to be operable are non- ,

safety related and are provided with dead load supports only. Although these systems are non-essential, the dead load supports (vertical seismic load only) serve a safety function to insure that an essential system is not degraded by failure of a non-essential system.

Proposed Md Approved o l" - r M. N. Bressler Principal Engineer, Nuclear Standards and Materials Section, EN DES Aoril 6, 1977

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Date TVA 10S35 (EN DES 2 77) , 9

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