ML052650219
| ML052650219 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 09/13/2005 |
| From: | MPR Associates |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 0108-0236-01 | |
| Download: ML052650219 (8) | |
Text
USER RESPONSIBLE FOR VERIFYING REVISION, STATUS AND CHANGES VTD 327928 001 1 PRINTED 20050810 MPR Associates, Inc.
- MLPR 320 King Street Alexandria, VA 22314 RECORD OF REVISIONS Calculation No.
Prepared By l
ecked By Page: 2 01RA8-0236-01 Page Description Revision IAffected Pages Description 0
All Initial Issue
- Note: The revision numberfound on each individualpage of the calculation caries the revision level of the calculation in effect at the time that page was last revised.
MPR OA Form OA-3.1 -Z Rev. 0
USER RESPONSIBLE FOR VERIFYING REVISION, STATUS AND CHANGES VTD 327928 001 1 PRINTED 20050810 MPR Associates, Inc.
-F 320 King Street Alexandria, VA 22314 Calculation No.
Prepared By Checked By Page: 3 01080236-01 Revision: 0 Table of Contents 1.0 2.0 3.0 4.0 5.0 Purpose......
Summary....
Inputs........ I A
a.....................................
.........................................4 od....................................................................
w Calculation.
.6 4.1 Minimum Wall Tickness.
6 4.2 Reinforcement of Opening............................................................
6 4.3 Required Area of Reinforcement.
6 4.4 Limits of Reinforcement.
7 4.5 Metal Available for Reinforcement......................................................
7 References......................................................................................................... 9 MPR OAFormn: QA-3.13, Rev. 0
USER RESPONSIBLE FOR VERIFYING REVISION, STATUS AND CHANGES VTD 327928 001 1 PRINTED 20050810 Calculation No.:
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1.0 PURPOSE This calculation documents the size hole that can be tolerated in the Salem Unit I ITT 4-inch Nuclear Diaphragm Valve.
The analysis is conducted in accordance with the 1971 ASME Code,Section II, Subsection NB, with addenda through Winter 1971. Allowable stresses are for a Class 3 component.
2.0
SUMMARY
If reinforcement available in the valve body wall is considered due to a wal thickness thicker than required to meet minimum wall thickness requirements, then a postulated hole as large as:
dhole = 0.75 In is permissible.
The margin, which is defined as the available reinforcement divided by the required reinforcement is:
Mcinf a = 6.4 Maeif b = 9.3 The two margins are for the two requirements of the code, i.e., that 100% of the required reinforcement is to be within the distance L4ar, from the axis of the opening, and that 2/3 of the required reinforcement is to be within the distance lvu2 from the axis of the opening.
For information, the minimum size opening in the valve body adjacent to the valve body flange that does not require reinforcement is:
dopen-min = 0.15 in
USER RESPONSIBLE FOR VERIFYING REVISION, STATUS AND CHANGES VTD 327928 001 1 PRINTED 20050810 Calculation No.:
WMPR X
-IOB-0236-01 MPR Associates, Prepared By:
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3.0 Inputs P : 200puig Design pressure (Ref. 2. Note 3)
Tdes-160F S = 0.8.16.5ksi twal := 0.2Sin S e 13.2 ksi Design temperature (Ref. 2, Note 3)
Design stress intensity for SA-351, Grade CF8M at 200F, which bounds the design temperature; a casting factor of 0.8 Is applied, which Is the lowest value in Ref. 1, Table l-7.2 Note 4 (Ref. 1, Table 1-7.2 for design stress intensity and Ref. 2 for material)
Minimum thickness of valve body (Ref. 2. Note 6)
Approximate outside diameter of valve; based on OD of 4 sch. 40 pipe (Ref. 3) do-= 4.5in do -
twall rm 2
rm = 2.l 3 in Mean radius of valve body dholc := 0.75-in Postulated hole diameter in valve body at the approximate location of the valve flange
USER RESPONSIBLE FOR VERIFYING REVISION, STATUS AND CHANGES VTD 3279"28 001 1 PRINTED 20050810 Calculation No.:
EaMPRu 0108-0236-01 MPR Associates, Inc.
Prepared By:
Revision No.: 0 32D King Street By: Po A 4Pg o
Alexandria VA 22314
'Checked By
.~d~A-~Page No.: 6 4.0 Calculation 4.1 Minimum Wall Thickness Per NB-3332.2, the required area of reinforcement is based on the required thickness of the valve body at the location in the absence of an opening. Per NB-3324. 1, these required thickness is:
Pjdo t:
2(5 + 0.5 P) where P = 200 psi do = 4.5 In S = 13.2 ksi 4.2 Reinforcement of Opening tr = 0.0338 in Openings meeting the requirements of NB-3332.1 do not require reinforcement. The maximum opening diameter not requiring reinforcement is:
dopenzmin m
0.2-V;r; ia dopeninin = 0.146in where rm = 213 in twall = 0.25in 4.3 Required Area of Reinforcement The required area of reinforcement for an opening is defined by NB-3332.2:
Areinf req ` dhole-r where dholO
= 0.75 in A4renfn req _ 0.0254in ir = 0.0338 in
USER RESPONSIBLE FOR VERIFYING REVISION, STATUS AND CHANGES VTD 327928 001 1 PRINTED 20050810 Calculation No.:
Prepared.
,,0108236-01 MPR Associates, Inc.
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j Revision No.: 0 320 King Street Alexandria VA 22314 Checked By: &dN#Jitti Page No.: 7 4.4 Limits of Reinforcement NB-3334.1 provides the distance from an opening within which 100% of the required reinforcement is to be located parallel to the vessel wall. NB-3334.1 also provides the distance from an opening within which 2/3 of the required reinforcement is to be located parallel to the vessel wall. These parallel distances (Lapq, and Lpar2, respectively) are calculated below. A corrosion allowance is not included in these calculations since the material is stainless steel.
Lparl :=max(dhlc,, dl twan where dhole = 0 75 in twal1 = 0.25 in Lparl - 0.750 in Lpar2 2dhole +
t.5.r, a
where do = 4.5 in rm = 213 in 4.5 Metal Available for Reinforcement Lpar2 0.739 in Per NB-3335, valve body metal available for reinforcement is that which is in excess of the minimum required wall thickness. The metal parallel to the vessel wall that is available for reinforcement based on NB-3334.1 is:
Apard i'
(2Lpari - dhole)-(twall - tr)
Apar2 := (2Lpaj.2 - dhole)-(twali -
tr)
Apart = 0.162in2 Apa,2 = 0.158in2 NB-3334.1 states that 100% of the required reinforcement is to be within the distancedLpa from the axis of the opening and that 2/3 of the required reinforcement is to be within the distanceLpar2 from the axis of the opening. The required reinforcement area is:
Areinf req = 0.0254 in
- USER RESPONSIBLE FOR VERIFYING REVISION, STATUS AND CHANGES VTD 327928 001 1 PRINTED 20050810 Calculation No.:
RIMRPeae y 0108-0236-01 MPR Associates, Inc.
Revision No.: 0 320 King Street Alxadra A 234Checked By: po"odv-""'
41-Page No.: 8 Alexndri VA2231
.a 7s-in at(i2 The margins of the actual to required reinforcements areas are:
Mreinf a Arl 6reinf re9 Mceinf a = 6.39 mrenfb
- 2Apar2 3Areinf req 31 Mrjfp=9.31
- USER RESeONSIBLE FOR VERIFYING REVISION, STATUS AND CHANGES VTD 327928 001 1 PRINTED 20050810 Calculation No.:
M I
M -R--0108.0236-01 MPR Associates, Inc.
Prepared By:
Revision No.: 0 320 King Street Checked By. r-V~
Apr Pg N.
Alexandria VA 22314 Page No.: 9 5.0 References
- 1.
1971 ASME Code, Section HII, Nuclear Power Plant Components, with addenda through Winterof 1971.
- 2.
ITT Engineered Valves Drawing No. SD-C-101869, 14" Nuclear Diaphragm Valve, H.
W. O., Revision G.
- 3.
Crane Technical Paper No. 410, "Flow of Fluids through Valves, Fittings, and Pipe, 1991.