ML19326B729
| ML19326B729 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/01/1974 |
| From: | Phillips J ARKANSAS POWER & LIGHT CO. |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19326B720 | List: |
| References | |
| NUDOCS 8004170561 | |
| Download: ML19326B729 (5) | |
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A R K A N S A S P O W E R & LI G H T C O f.1 r. A N Y STM AVENUE AF 0 PINE STACET
- PINE BLUFF. AAKANGAS 71601 e (5013 534-1330 February 1,1974 i
Mr. Norman C. Mmeley, Director Directorate of Regulatory Operatione Region II United States Atomic Ene 3y Commission 230 Peachtree Street, N.tl. - Suite 818 Atlanta, Georgia 30303 L
Subject:
Arkansar: i over & Light Compan; Arkansas Nuclear One - Unit 1 Docket No. 50-313 Valve Wr.11 Thickness Verification Addendun 1
Dear Mr. Moseley:
Enclosed c.re two (2) copies each of pages 4, 4a, and Exhibit I which we 3
submit as Addendum 1 to our Valve Wall Thickness Verification Program, j
forwarded to you by our letter of December 7,1973. It is necessary to make this addendum to provide additional information on Core F1ced Valves CV-2415 and CV-2419.
Very truly yours,
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3 J. D. PHILLI?3 Senior Vice President JDP: NAM:mb l
Enclosures as noted l
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- TAX P AYING. INVESTOR OWNED 3 MEMUS A MICOLE SOUTH UTILITIES SYSTEM e
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indicated on the contour dravings.
All the valves'were evaluated in accordance with the Codes and the required tm listed on the large valves list (Exhibit I).
The results I
of the measurements are shown on the ND Inspt tion Reports (Exhibit IV).
l valves DH-14 A, B, and CF-1A, B have 12" bodies with reducers j
i welded on eithr* end to suit 14" diameter pipe.
The connections for all Nucicar Class I valves and reducers wer. anal.=ed and the analysis shows that there connections rect theErequire-j monts of ANSI B31-7 Code.
J Valve body c n:.sur at weld ends is in accordance with ANSI B 16.5.
The only thic, knees restriction relate.. to the 1-1/2 t (t n nominalpipewa'llthicknes7) distance used in describing the weld en'd geometry is that the wall thickncss of the valve should not be'less than 1.15 t at this point.
This is per letters from ANSI Standards Committee B16 to Velan Engineering Ltd. dated June 30, 1971 and February 3, 1972.
(See Exhibit VIII).
The measured t'm (valve body wall at a distance of.
1-1/2 t from end of the valve) was therefore compared to,a i
value equal to 1.15 -(where t = nom. wall of connecting pipe).
1
,h The piping upstream of valves CV-2415 and CV-2419 has been J,
designed at 700 psig and-300*F, whereas the downstrear side is' designed'to 2500 psig and 300*F.
We have s'hown both I
these conditions'and the required t,on Exhibit I.
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ADDENDUM 1
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The' pressurizer ' safety. valve, PSV-1000, which is an cicetruantic relief l
F valve', manufactured by Dresser, was measured in suspect areas wherever l
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_ possibic. There was one particular area shown on the Vendor's drawing, j
l where it was found that there could be an encroachment on minimum wall, i
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- that was not measured, as it was not possible to get a reading l
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ADDENDUM 1
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1 EXilIRIT I ADDENDUM 1 LARGE VALVE LIST Des.
Des.
Press Tt.p Reqd 9ty Size Type Valve No.
System Psig.
- F Code (1) tm 2,
14" Check DilV 14A, B Decay lleat Removal 2500 650 ASME N.P&V 2.10" 2
14" Check CF 1A, B Core Flooding 2500 300
- 1. 5 0" (2) 2 12" Check DilV 13A, B Decay IIeat Removal 2500 300
- 1. 4 6 " (2) 1 10" Gate CV-1400 Decay IIeat Removal 2500 650 ANSI B31.7 1.719"
& B 16.5 1
10" Gate CV-1401 Decay lleat Removal.
2500 300 1.719" 1
12" Gate CV-1050 Decay IIcat Removal 2500 650 2.000" l
12" Cate CV-1410 Decay Heat Removal 2500 300 1.330" (3)
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700 300 0.542" (3)
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Core Flooding ((I; Outlet)2500 300 1.431" (3) 3 2 14" Cate C'l-2415, CV-2419 2
3" x 6" Relief PSV1001, PSV-10.02 R. C. System 2500 670 ASME Sec III, '68 0.625 f
& ANSI B 16.5 21" x 3" Belief PSV 1000 R. C. System.
2500 670 0.500" l'
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8" s, heck DH-17, Dil-18 Decay 1: cat Removal. 2500 650 ASME Sec,III, '71 1,41" (1) Codes:
ASME N.P. & V
- Draft ASME Code for Pumps and Valves for Nuclear Service ASME Sec. III, '68 - ASME P & V Code,Section III, 1968 Edition ASME Sec. III, '71 - ASME P & V Code,Section III, 1971 Edition
- Nuclear Power Piping Code ANSI 5.5
, Steel Pipe Flanges and Flanged Fittings (2) iNon-Standard Rating-See para. II 5 of the Program I
Per MSS-SP-66 Requirements
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Letter from Arkansas Pow-: and Light company, J. D. Phillips, FEB 3 31974 50-313 i
dated February 1, 1974 t
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