ML20212E493

Smud Vent Valve Matl & Hinge Clearances

ML20212E493
Person / Time
Site:	Rancho Seco
Issue date:	12/17/1986
From:	Malone E, Reynolds R BABCOCK & WILCOX CO.
To:
Shared Package
ML20212E483	List: ML20212E476 ML20212E493 ML20212E535
References
51-1167259, 51-1167259-00, TAC-63083, NUDOCS 8703040365
Download: ML20212E493 (8)

Text

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.- ;4 ATTACilMENT 1 B'ANS 20no 3 :s es) -

CCW O MICOX ENGINEERING INFORMATION RECORD a Mcoermott comparty Safety Related:

Document identifier 51 -1167259-00 Yes 00 No O SMUD VENT VALVE MA'rERIAL AND HINGE CLEARANCES Title Prepared by _

Date /2MG/f/

I R.B[ REYNOLDS Revis, ed by A * -- Date /Z//7 !8#

' &~ d. Mhestf f/ l lf 01]f Remarks:

The information contained herein has been prepared to document the material of construction and hinge clearances of the Reactor Vessel Internals Vent Valve.

It should be noted that the values calculated herein differ from those reported in Table 3.2-11 of the USAR. However, it is felt that the calculated results accurately represent the clearances on the reactor vessel vent valve hinge.

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l 8703040365 870220 PDR ADOCK 05000312 P PDR Page / of 8

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I. SCOPE SMUD requested B&W to provide information on the Reactor Vessel Vent Valves. The specific- information is the material for the valve body, valve disc, disc / body shaf t, and shaft bushings; and-the hinge interface clearances.

II. _ INTRODUCTION The Q . 7. . Data Package (B&W ~ Document 23-0745-00) identifies the material and drawings for the .SMUD . Vent Valves.

However, the specific dimensions of interest are not listed for all of the respective parts. The Q.A. Data Package (B&W-Document 23-ll7817-00) for Toledo Edison lists the specific dimensions of interest and the same drawings used . for the design / manufacture of the TED vent valves were the same for the design / manufacture of the SMUD vent valves. Based on this comparison, the vent valve hinge clearances can be determined. The. material specifications will be taken from the SMUD Data Package. The vent valves- were design /

manufactured by Atwood & Morrill Co (A&M), Salem, Mass.

i III. REFERENCES A. B&W Document 23-0745-00 for SMUD Contract 620-0011, Internals Vent Valve Q.A. Data Package.

B. B&W Document 23-1117817-00 for TED. Contract 620-0014, Internals Vent Valve Q.A Data Package.

C. B&W Document 51-1164588-00. TMI and DB-1 Vent Valve Material & Design Comparison.

D. 1983 ASME Code,Section III, Division I Appendices.

'( Value)

E. SMUD USAR, Volume II, Chapter 3.

IV. DISCUSSION The specific materials for the SMUD Vent Valves body, disc, shaft, and bushings are listed in Table 1. The cross reference of the TED and SMUD drawings are listed in Table

2. The specific dimensions for the respective parts are listed in Table 3, and the hinge clearances are tabulated in Table 4. Figure A identifies the respective locations where the clearances are tabulated.

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There are eight (e) vent valve assemblies. They were all designed / fabricated to. the same requirements. ~ Atwood &

Morril assigned.each assembly a serial number which is: 50-547,51-547, 52-547,53-547, 54-547,-55-547,56-547, 57-547.

The data for this document will be taken from serial number 56-547 and 50-547.

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51-1167259-00 TABLE 1 Internal Vent Valve Materials

'(Ref.'III.A.-& Ref. III.E Table 3.2-10)

Valve Part Name A&M Part No. Material Specification Valve' Body, 1- ASTM'A351 Gr-CF8 Valve Disc 4 ' ASTM-A351 Gr-CF8-Disc Shaft 5 ASTM-A276 Type 431 Cond-T Shaft-Bushings 7 Stellite #6 TABLE 2 TED vs. SMUD Drawings

-TED Drawing SMUD Drawing Valve Part Name (Ref. III-B) (Ref. III~A)

Valve Body 20690D-10 20690D-10 Valve Disc 20691D-4 20691D-4 Disc Shaft 22608B-3 22608B-3 4

Shaft' Bushings 23331A-2 23331A-2 4

51-1167259 .

TABLE 3 Specific. Dimensions

.(Reference-III.C)

Design

. Valve'Part Name A&M Part No. Description Dimension (in.)

Valve Body 1 Body. Lug Gap 5.765-5.780

Body Lug Hole'I.D _2.000-2.005=

Valve Disc 4 Disc Hub Width 4.740-4.750 Disc Hub Hole I.D. 2.000-2.005 Disc Shaft 5- Shaft O.D. 1.485-1.490 Shaft Bushing 7 Bushing I.D. 1.500-1.505 Bushing O.D. 1.995-1.997

-Bushing Flange .245- . 248 Thk.

5 f

- w - p--, ,

--,p- --- . , - , , , -

7,, . ...

T ,51-116 72 59-C0 '

TABLE 4 l Vent 1 Valve Hinge Clearances (See Figure A for Locations)

A.. Cold Clearance (at 70-F). in.

. Bushing ID 1.500 to 1.505 Shaft OD 1.490 to 1.485 0.010- to 0.020 Diametral clearance (gaps 1,2,7;and 8)

' Lug / Hub ID 2.000 to- 2.'005 Bushing OD- l'997 to 1.995 '

0.003 to 0.010 Diametral clearance

-(gaps 3,4,5,and 6)

Bushing End Clearance Body Lugs 5.765 to 5.780 Disc-Hub 4.750 to- 4.740 1.015 to 1.040 Bushing Flanga .992 to .980

.023 to .060- End clearance

.245x4=.980' (gaps 9 and 10)

.248x4=.992 .

B. Hot Clearance (differential crowth from 70 to 580 F1-Linear coefficient of thermal expansion of the materials for a temperature change from 70 to 580 F.

Shaft -

A276-TP.431 6.7x10-6 in./in.-F Ref. III C Bushing -

Stellite No. 6 8.1x10-6 in./in.-F Ref. III C Bodies -

CF8 Stainless 9.5x10-6 in. fin.-F Ref. III D delta T = 580 - 70 = 510F Shaft D=D T = 1.5(6.7 x 10-6) 510'= 0.0051 Bushing ID D = 1.5(8.1 x 10-6) 510 = 0.0062 0.0011 Typical diametral

> clearance increase Bushing OD D = 2(8.1 x 10-6) 510 = 0.0083 Lug / Hub ID D = 2(9.5 x 10-6) 510 = 0.0097 0.0014 Typical diametral 4

clearance increase 6

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_ _51-1167259-00=

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. TABLE 4 (Cont'd)

-Bushing Endplay.

. CF8 - Lug / Hub '. L'= 1(9.5.x'10-6)'510 = .O.0048 Stellite.No. 6 bushing L = 1(8.1 x 10-6) 510 = 0.0041 0.0007 Typical end.

clearance increase 7

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• 51-1167259-00.

FIGURE A

. -VENT VALVE HINGE CLEARANCE LOCATIONS N

- s T

• Z* *z-VALVE BODY

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VALVE DISC BODY LUG GAP 9 GAP 10 GAP l GAP 2 GAP 5

{ GAP 6 h6 bb

1 l l lllllllll& ////flll20 h VllllYllll (lllllYllA l MN'" x%%%'NWN' M

.AP , a .AP , i .AP , i L .AP ,

SHAFT

[DISCHUB BUSHING SECTION Z-Z Page a of 8

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