ML20073J725

Rev 1 to Core Design Spec 25A5580, Shroud Stabilizers

ML20073J725
Person / Time
Site:	Peach Bottom
Issue date:	09/24/1994
From:	Ahmann R, Lenz M, Trovato J GENERAL ELECTRIC CO.
To:
Shared Package
ML19304C598	List: ML20073J699 ML20073J717 ML20073J725 ML20073J731 ML20073J741 ML20073J750 ML20073J770
References
25A5580, NUDOCS 9410070097
Download: ML20073J725 (7)

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GENudarEmyy 25A5580 SH NO.1 REV.1 I

EIS IDENT: SHROUD STABILIZERS REVISION STATUS SHEET DOC TITLE SHROUD STABILIZERS LEGEND OR DESCRIPTION OF GROUPS TYPE: CODE DESIGN SPECIFICATION FMF: PEACH BOTTOM 2 AND 3 MPL NO: PRODUCT

SUMMARY

SEC. 7 THIS ITEM IS OR CONTAINS A SAFETY RELATED ITEM YES3 NO r'l EQUIP CLASS CODE P_

REVISION C

A RM-01386 9/12/94 l

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JTROVATO SEP 2 41994 RJA f

CONTROL ISSUE RM-01502 CHK BY: J TROVATO t

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6 PRINTS TO MADE BY APPROVALS GENERAL ELECTRIC COMPANY 175 CURTNER AVENUE J.L. TROVATO 8-22-94 M.O. LENZ 9 12-94 SAN JOSE, CALIFORNIA 95125 CHK BY ISSUED 9-12-94 J.L. TROVATO 9-12-94 R.J. AHMANN CONT ON SHEET 2 MS-WORD 9410070097 940926 PDR ADOCK 05000277 P

PDR

N 25A5580 SH NO. 2 REV.1

1. SCOPE 3

1.1 This document defines the ASME Code design requirements for the shroud repair for welds H1 through H7.

2. APPLICABLE DOCUMENTS 2.1 General Electric Documents. The following documents form a part of this sp c'fication to the extent specified herein.

i 2.1.1 Supponine Documents a.

Reactor Vessel - Power Rerate 25A5341 Rev. 0 b.

Reactor Pressure Vessel, Purchase Specification 21 A1111 Rev. 9 c.

Reactor Vessel, Purchase Part 886D499 P2 Sheet No.

Revision No.

I 11 2

8 3

3 4

6 5

3 6

4 l

7 6

8 0

i I

l d.

Reactor Thermal Cycles 729E762 Rev. O

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e.

Nozzle Thermal Cycles 135B9990 l

Sheet No.

Revision No.

1 1

2-8 0

i l

f.

Vessel Flange Bolting 885D911 Rev.2 g.

Nozzle End Preparation 107C5305 Rev.2 h.

Standard Requirements For Core Stmeture 21A3319 Rev.1 l

2.1.2 Supplemental Documents. Documents under the following identities are to be used with this i

specification:

a.

Shroud Stabilizer Hardware Design Specification 25A5579 l

Y GENuckarEnergy 25A5580 s,, no. 3 REV. I 2.2 Codes and Standards. The following documents of the specified issue fonn a part of this specification to the extent specified herein.

2.2.1 American Society of Mechanical Encineers (ASME) Boiler and Pressure Vessel Code Section III,1965 Edition and Addenda through Winter 1965 a.

b.

Section XI,1980 Edition and Addenda through Winter 1981 2.2.2 Other Documents

a. UFSAR, Peach Bottom 2 and 3

b. Shroud Support VPF 1896-064-7

c. Design Certification VPF 1896-142-1

d. Design Stress Repon VPF 1896-146-1

e. Final Design Report VPF 1896-148-2

3. GENERAL DEFINITION 3.1 The purpose of the shroud stabilizers is to structurally replace all of the horizontal welds (H1 through H7) in the shroud. These welds were required to both horizontally and vertically support the core top guide, core suppon plate, and shroud head, and to prevent core bypass flow io the downcomer region. The core top guide and core support plate horizontally support the fuel assemblies and maintain the correct fuel channel spacing to permit control rod insertion, as well as having other structural functions.

3.2 All of the non ASME Code requirements for the shroud stabilizers are defined in the Document of Paragraph 2.1.2.a. The ASME Code requirements are defined herein.

4. REQUIREMENTS 4.1 The shroud stabilizer construction shall be performed in accordance with a Section XI Replacement Program per the requirements of Article IWA-7000. The core shroud was not supplied as a ASME Code component. However,Section XI requires In Service Inspection (ISI) of the Core Support Stmetures.

The required Replacement Program is different than most Replacement Programs, because the stabilizers are not a direct replacement. Instead, the structural functions of the shroud horizontal welds are replaced by new components. Any defects found in the shroud horizontal welds are acceptable after the installation of the stabilizers.

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'Y GENudearEnergy 25A558o su no. s l'

REV.1 4.2 The shroud stabilizers shall be constructed to the original Owners Requirements (document of

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Paragraph 2.1.1.h) for the shroud, as there was na Code of Construction.

4.3 The shroud stabilizers change the points of application of the forces applied to the reactor l

pressure vessel from the core shroud. These new forces shall be analyzed in accordance with the

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original Code of Construction (document in Paragraph 2.2.1.a).

4 4.4 The new forces and their points of application are defined in Figure 1, and in Table 1. The j

values given in Figure 1, and in Table 1 shall be combined with the forces defined in the Design 1

j Specification (documents of Paragraphs 2.1.1.a through 2.1.1.e).

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4.5 The original purchase specification for the reactor pressure vessel (document of Paragraph j

2.1.1.b) specified that the boundary of jurisdiction of Section III of the ASME Code (document of Paragraph 2.2.1.a) shall include all attachments to the pressure boundary parts, but does not include the components that are welded to the attachments. Thus, the jurisdiction of the original Code of Construction included all weld build up pads used to attach internal components to the reactor pressure vessel, but did not include the shroud support within the boundary of Code jurisdiction. The boundary of ASME Code jurisdiction is shown in Figure 2.

4.6 The analysis required by this Design Specification shall be Certified.

5.0 PROFESSIONAL ENGINEER CERTIFICATION To the best of my knowledge and belief, this Design Specification satisfies the requirements of the ASME Boiler and Pressure Vessel Code 1965 Edition with Addenda through Winter 1965.

ate: 8M 26 /994 i

Signature:

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License Number.

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NNb 25A5580 SH NO. 5 REV.1 ADDITIONAL DESIGN MECHANICAL LOADS Force DBE + Normal Pressure MCE + LOCA F1 33,400 lbs 89,600 lbs F2 16,800 lbs 31,200 lbs F3 168,600 lbs 448,770 lbs F, F, and F are discrete loads applied over a small area. At any one point in time, F and F2 1

2 3

1 3 s applied to 4 locations 90* apan are each applied to one location. At any one point in time, F i

for the installation of four shroud stabilizer assemblies. DBE is a Design Basis Eanhquake (OBE).

MCE is a Maximum Credible Earthquake (SSE).

For a Main Steam Line LOCA without seismic loads, F3 = 321,933 lbs.

The stress intensities shall meet the stress allowables of the ASME Code,Section III, for the load combinations defined by the Peach Bottom UFSAR. The original Code of Construction did not include Faulted load combinations. Faulted load combinations shall meet the stress allowables as defined by the Peach Bottom UFSAR for the reactor pressure vessel.

TABLE 1 l

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- - + - -

W

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N 25A5580 SH NO. 6 REV.1 i

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F, 244 in. ---

J' F3 72 in.

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4.25 m.

FIGURE 2 J

l APPLICATION OF DESIGN MECHANICAL LOADS FIGURE 1

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25A5580 SH NO. 7 REV.1 FINAL I

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8 SECTION ill

' NON-CODE INTERNALLY CLASS A SUPPORTED STRUCTURE f

'I RPV REQUIRED BOUNDARY I

i OF JURISDICTION i

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SHROUD SUPPORT j

CYUNDER k

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SHROUD SUPPORT' f

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PLATE I.

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SEE DOCUMENT IN PARAGRAPH 2.2.2.B FOR DIMENSIONS 1

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BOUNDARY OF ASME CODE JURISDICTION FIGURE 2

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B

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