ML20195E130

Forwards Addl Info on Safety Classification of Instruments Air Tubing & Components for Safety Related Valve Top Works, Re Requesting Exception to RG 01.026

ML20195E130
Person / Time
Site:	Waterford
Issue date:	11/13/1998
From:	Ewing E ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RTR-NUREG-0800, RTR-NUREG-800, RTR-REGGD-01.026, RTR-REGGD-1.026 W3F1-98-0166, W3F1-98-166, NUDOCS 9811180244
Download: ML20195E130 (6)

Text

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Ente gy Operations,Inc.

KiHona. LA 70006 Tel 504 739 6242 E

C. Ewing, ll1 Nugear hfety & Regulatory Affairs W3F1-98-0166 A4.05 PR November 13,1998 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Subject:

Waterford 3 SES Docket No. 50-382 License No. NPF-38 AdditionalInformation on Safety Classification ofinstrument Air Tubing and Components for Safety Related Valve Top Works Gentlemen:

By Letter W3F1-97-0175, dated July 3,1997, Waterford 3 requested an exception to Regulatory Guide (RG) 1.26, " Quality Group Classifications and Standards for Water, Steam, and Radioactive-Waste-Containing Components of Nuclear Power Plants," as stipulated in Standard Review Plan (SRP), NUREG-0800 The SRP states exceptions to the specified quality group classifications of RG 1.26 are 4

acceptable if justification can be demonstrated by alternate design rules based on the use of a more conservative design.

Per conversation with C.P. Patel of your Staff, a comparison of the B31.1 design and Regulatory Guide 1.26 was requested. Attached is a comparison of ANSI B31.1, ASME Section lll Subsection ND, the as-built requirements, and an evaluation of the as-built requirements. This comparison is not article by article, but was performed on the critical characteristics used in the design and installation of the Instrument Air System, included in this comparison is an evaluation of how the actual design and installation compares with ASME Section Ill, Subsection ND requirements. Based on this evaluation, Waterford's alternate design, with lower stress allowables from

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ANSI B31.1 and the increased quality control of materials from ASME, is considered a more conservative design than required by the SRP and RG 1.26.

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- Additional Information on Safety Classification of Instrument Air Tubing and Components for Safety Related Valve Top Works W3F1-98-0166

. Page 2 November 13,1998 p

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. Should you have any questions or comments concerning this request, please contact

- me at (504) 739-6242.

i Very truly yours,

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N E.C. Ewing I

Director Nuclear Safety & Regulatory Affairs ECE/ CWT /rtk Attachment -

cc:

E.W. Merschoff, NRC Region IV C.P. Patel,' NRC-NRR J. Smith N.S. Reynolds NRC Resident inspectors Office F

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l W3F1-98-0166 ATTACHMENT A l

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Comparison of ANSI B31.1 1977 Edition,1977 Winter Addenda cnd ASME Section lil, Subsection ND,1974 Edition, 1976 Summer Addenda for installation and ANSI B31.1 1977 Edition and ASME Section 111, Subsection ND,1977 Edition with Summer 77 Addenda for design Requirement -

ANSI B31.1 ASME Section ll1 Asbuilt Requirements.

' Asbuilt Evaluation -

A!!owable Vary, dependant on material.

Vary, dependant on material.

Used ANSI B31.1 allowable More conservative than Stresses stresses.

ASME Section Ill.

For materials used as part of Design Specification LOU 1564-407A, at the system operating temperatures, the B31.1 allowable stresses are more conservative than the ASME Section 111 allowable stresses.

Design Use equations based on Use equations based on Use equations based on Equivalent to ASME Requirements application.

application application.

Section 111.

ASME Section !!! follows ANSI B31.1 almost verbatim. Equations used in the design process are the same.

Matenals ANSI B31.1 approved ASTM ASME Section 111 Class 3 ASME Section lit Class 2 tubing Use of ASME Section 111, or ASME Section 11 materials tubir

was utilized.

Class 2 tubing was equivalent to or more conservative than ASME Section 111, Class 3 requirements.

Filler Metal Filler metals comply with Filler metals comply with filler Design specifications required Equivalent to ASME filler metal specifications metal specification and ASME compliance with material Section ill approved by ANSI B31.1.

Section ill, ND-2400 specification and ASME Section lli (Chemical Analysis and Delta requirements.

Ferrite Determination on each heat) l l

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Requirement

- ANSI B31.1 ASME Section 111 Asbuilt Requirements Asbuilt Evaluation:

Welding Qualified per ASME Section Qualified per ASME Section Design specifications and vendor Equivalent to ASME Procedurcs IX.

IX.

installation procedures required Section til l

welding procedure quali5 cation per ASME Section IX Welders Qualified per ASME Section Qualified per ASME Section Design specifications and ~ endor Equivalent to ASME v

IX.

IX.

installation procedures required Section 111 welder qualification per ASME Section IX.

Each welder assigned an Each welder assigned an Vendorinstallation procedures Equivalent to ASME identification symbolto identification symbol to required that each welder be Section 111 identify work performed by identify work performed by assigned an identification symbol to the welder.

the welder.

identify work performed by the welder.

Socket Welds 1/16* (approx.) pull back 1/16" (approx.) pull back Design specifications and vendor Equivalent to ASME required before welding.

required before welding.

installation procedures required a Section 111 1/16"(approx.) pull back before welding.

Socket Weld Size = 1.09 x Socket Weld Size = 1.09 x Vendor installation procedures Equivalent to ASME pipe wall or thickness of the Pipe Wall but notless than required a Socket Weld Size = 1.09 Section til socket wall, whicheveris 1/8".

x Pipe Wall but not less than 1/8'.

less.

Visual Allwelds require a visual None Design specifications required that Superior to ASME Examinations examination.

all welds receive a visual Section lit examination.

Nondestructive Nondestructiva examination Nondestructive examination Nondestructive examination of Equivalent to ASME Examinations of socket welds is not of socket welds is not tubing socket welds was not Section ill (Other Than required.

required.

performed.

Visual) 2

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. Ty ANSI B31.1 ASME Secton 111.

Asbudt Requwements 9. -

Asbudt Evaluston Requirement 7-e

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Pressure Testing Initial Service Leak Testing Hydrostatic +x+pance test Vendorinstallaton procedures This is not equivalent to (ISLT) indicate thatinservice leak tests ;

ASME Sechon 111.,

were perforrned Mc ;;;.,it does prove pressure boundary integrity. Furthermore,if we replaced the entire system today under ASME Secton XI, pressure testing would not be required.

ANil Review None Work available for ANil ANil was not involved in instrument

.This is not equivalent to review tubing fabncaton.

ASME Secten Ill.

However, under current ASME Sechon XI requirements, any repairl replis.,r.ent performed on tubing would not include ANIlinvolvement.

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