ML18047A452
| ML18047A452 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 12/02/1981 |
| From: | Beck J, Bolger F, Huffman R DRESSER INDUSTRIES, INC. |
| To: | |
| Shared Package | |
| ML18047A442 | List: |
| References | |
| SV-178, SV-178-R01, SV-178-R1, NUDOCS 8207160347 | |
| Download: ML18047A452 (47) | |
Text
{{#Wiki_filter:* CR ESSER INCUSTRIES SV-178 Rev. 1 Page 1 of 29 INCUSTRIALVA.LVE & INSTRUMENT CIVISICN Cl sex 1430 D ALEXANCRIA, L.CUISIANA 71301 TEL.. 31B/64C*225C CJ TWX: 510-976*57:33 0 TEL.EX: SB-642:3 0 CABL.E: CIVIC PRESSURIZER SAFETY VALVES (PSV) PRESSURIZED WATER REACTORS SAFETY AND RELIEF VALVE TEST PROGRAM JUSTIFICATION REPORT SV-178 Prepared For Electric Power Research Institute Safety and Analysis Department Nuclear Power Division Prepared By: ~ R. S. Huffman Sr. Product Engineer Reviewed Approved By: J. D. Beck Manager, Product Engineering ASHCRCF'T CJ HANCOCK 0 CCNSCL.IOATEC CJ HEISE CUICaSl:A INCIU!ITIUES, INC. 8207160347 820401 PDR ADOCK 05000255 P PDR* Date i "2. * "7.. ':t I Date Date
Paragraph 1.0 Paragraph 2.0 Paragraph 3 ob Paragraph 4.0 Paragraph SoO TABLE OF CONTENTS Introduction SV-178 Rev. 1 Page 2 of 29 Description of the Basic Valve Model Selected Test Valves Design ~Tariations Between PWR Plant Valves & Selected Test Valves Conclusion
- 1. 0 INTRODUCTION SV-178 Rev. 1 Page 3 of 29 1.1 The Pressurizer Safety Valve (PSV), made and supplied by the Industrial Valve Operations o.f Dresser Industries, Incorpora-ted, for use in Pressurized Water Reactors (PWR), is sold under the trademark "Consolidated Closed Bonnet Maxiflow Safety Valve" (Model 31700).
These valves are designed and certified under Section III of the ASME B&PV Code for applica-tion in Nuclear.Power Systems. The PSV is a spring loaded safety valve with a bellows and is actuated by a rise of internal steam pressure in excess of a specified value. The principles of design are the same for all PSV's in service or intended for service in domestic PWR's. For participating utilities, Dresser has supplied PSV's for twenty-nine (29) nuclear PWR plants. A total of ninety-four (94) valves, including spares, have been supplied for these plants. Table 2 lists PSV's by utilitY, plant, valve model number, size and description. The basic valve model number is 31700. For those valves listed in Table 2, the model number has the form 317X9YA-Z, where X, Y and Z are variables. The variables X and Y in-dicate the valve orifice size. Valve orifice sizes are identified either by a number or a letter. Table 1 lists the
SV-178 Rev. l Page 4 of 29 different orifices and their designations. If the orifice size designation is a number, then X is that number and Y has no value. If the orifice size designat')on is a letter, then X is zero and Y is that letter. The dash variable z is a design interchangeability number. There are two interchange-ability numbers: -1 and -2. Within any one valve model, the variable features are: (1) Inlet size, pressure rating, and facing; (2) Outlet size, pressure rating, and facing; Variable features are listed in the description column of Table 2.
TABLE 1 Orifice Sizes Orifice Designation Bore K 1.531 in. . 3
- l. 800 in.
5 2.062 in. 4 2.250 in. N 2.351 in. Size
- 1. 841 2.545 3.341 3.976 4.340 SV-178 Rev. 1 Page 5 of 29 Area sq. in.
sq. in. sq. in. sq. in. sq. in. Note: Orifice sizes are not necessarily in numerical sequence
- T.l\\RLE 2 IoTST rn** FWR ~JrU.* J*rJEs, PIA't'll'$ 6 AtID PP.ESSURIZ.RR SM!'E'.l"l Vl\\I.'JES IDHESSER lODEL 31'700 CIOOED W.l'Jliffl' UAXIFUM Sl\\F'E'J.~ VA£.VE m*n.rn PU\\NT DRAWING Q'IY.
MJDEL SIZE & DESCRIPI'ION Arizona Public Service Coopany Palo Verde 1 6 2a&3 3NC045 12 31709NA-1 Inlet: 61125001 ANSI Large 'lbngue Flange Oltlet; 810 6001 ANSI Raised Face Flange Arkansas PCMer & Light Coo Nuclear One Unit :R. 3CP1878 2 31759A-1 Inlet; 3" 2500# ANSI Raised Face Flange Outlet; 811 6001 ANSI Raised Face Flange Baltinore Gas & Electric Cailvert Cliffs 3CP1355 3l739A-l Inlet: 2~" 2500# ANSI OJopany l ' 2 3CP2030 Small 'lbngue Flange 3NC016 outlet: 6 11 300# ANSI 30Cll0 Raised Face Flange Consumer Power Conpany Palisades 3-31739A 3 31739A-l Inlet; 3 11 2500i ANSI -l-X6-XFA1 &nall 'lbngue Flange -XOS122 OUtletg 611 6001 ANSI Raised Face Flange Consumer PcMer Coopany Midland l & 2 4CP2432 1 31739A-1 Inlet:2J.:!112500i ANSI 3NC098 Small 'lbngue Flange 3tell5 Outlet: 6 11 600# ANSI tcJ ~ C/l Raised Face Flange Pl fD <: IQ <: I fD
- t-'
()Jke Pa,..rer ~any Ocx>nee 1 0 2,&3 3CP10BO 8 31739A-1 Inlet; 2!..i" 25001# ANSI ~ Small 'lbngue Flange O"I t-' 00 0 Outlet: 6'0 600# ANSI Ha Raised Face Flange I\\.) U>
- TABIB 2 I.IST OF PWR IJTILITIES I PIAN'I'S, A:.'ID PRFSSUR:ZER SA~ VALVES DRESSER ~DDEL 31700 CIDSED BO\\i"'NET l.IAXIFT..£W SAFETY VAGVE I I.
Ui':tLI'IY PY.... ~"T DRAWING <]r'i. .~EI.. SIZE & DF.. SC.RIPTION Duke P<:Mer Coolpany Catawba 1-2 3NC019 8 31749A-2 Inlet: 6 11 2500# ANSI Large 'lbngue Flange Outlet: 6 11 600# ANSI Raised Face Flange Duke Paver Conpany Cherokee 1,2,3 and On Hold 24 31709NA On Hol*} Perkins 1,2,3 Florida Paver Corporation Crystal River 3 3CP1877 4 31739A-l Inlet: 2~" 2500# ANSI 3NC081 Small 'lbngue Flange Outlet: 6 11 300# ANSI Raised Face Flange U:>uisiana PCk/er & Light Waterforo 3 4CP2108 3 31749A-l Inlet: 3" 2500# ANSI Conpany 3NC109 Large 'lbngue Flange outlet: 8 11 300# ANSI Raised Face Flange Maine Yankee Atomic Maine Yankee 3CP1354 3 31709KA-l Inlet: 3" 2500# ANSI Paver Canpany Large 'lbngue Flange outlet: 6 11 300# ANSI Raised Face Flange '1:1 ~ Ul Pl fl) < ~ <: I ~tropolitan Edison Three Mile 2CP1074 4 31739A-l Inl~t: 2~" 2500# ANSI fl)
- I-'
Corrpany Islarrl. 1 3NC006 Srnall 'lbngue Flange -...I I-' CXI Outlet: 6 11 600# ANSI 0 Raised Face Flange Hl N \\0
'J'Pbill 2 LIS'!' OF P1JR ffi'ILITIES 0 PUJ.fi'S6 Al-ID IP.RES.500.IZER Sl.FE'l'il VAI... VF.B D~~f-~b'R f/i..lf.iti:I. '."jJ.700 CLJ).~EJJ BONi:lli.""'T MAXIFU:lW Sll..FEI'"ll ~IAJ.NE lf.!'lLI'l~ i:>I.:1.Nl' DHAWINIJ (]lTf o !4>DET.. SIZE & D&SCRIP'I'ICN ~tropolitan &Uson 'lbree Mile Island 2 3CP1571 3 ll759A-l Inleb 311 25001 ANSI Conpany 3tc003 Raised Face Flange Outlet: 6 11 6001 ANSI Raised Face Flange Northeast Utilities Millstone 2 3CP1719 3 31739A-l Inlet: 2~' 8 2500# ANSI 4CP2427 Large 'lbngue Flange Outlet: 611 600# ANSI Raised Face Flange Portland General Pebble Springs 4CP2332 3l709NA-l Inlet; 6" 2500# ANSI Electric Conpany Unit-
- 1.
Raised Face Flange outlet; 8 11 600# ANSI Raised Face Flange Scramento Municipal Rancho Seen l 3'l.'PJ41 31759A-l Inlet: 3" 2500# ANSI Utility District 4CP2395 Raised Face Flange outlet: 6 11 600# ANSI Raised Face Flange Southern califomia San Ooofre 2 & J 30C007 6 31709NA-l Inlet: 6 11 2500# ANSI tO ~ Ul &Uson Conpany 3NC096 large 'lbngue Flange Pl ID <: lQ <: I Outlet: 8 11 600ti ANSI
- 11)
- I-'
Raised Face Flange 00 I-' CX> 0 Hi Tennessee Valley Bellefonte 4CP2216 5 31709NA-l Inlet: 6 11 25008 ANSI N Authority l & 2 31'1:!097 ~ised Face Flange IJ) Outlet: 8 11 600#.llllJSI Raised Face Flar
- TABLE 2 LIST OF FWR urILITIFS, PI.ANI'S, AND PRESSURIZER SAFETY VALVES DRESSER IDIEL 31700 CIDSED BONNET MAXIFIDW SAFIDY VALVES urILIT'l
. Virginia Electric and Power Company Washington Public Power Supply System PU\\NT North Anna 1 & 2 Projects 1 & 4 DRAWING MJDEL 2CP1000 6 31759A-l 4CP2216 6 31709NA-l SIZE & DESCRIPTION Inlet: 6 11 1500# Special Flange Outlet: 6" 600# ANSI Raised Face Flange Inlet: 6 11 2500# ANSI Raised Face Flange Outlet: B" 600# ANSI Raised Face Flange 0 Hi
C* i-------*- -* 1 e SV-178 Rev. 1 Page 10 of 29 42 31 37 I~ ~- ~ Hr ~ fti_ 41 30 32 33 HI 31 1 -- ~ IB Vhl~*- A 9C !IA Ill 2 IA 18 11 II 1'
- ~a I e
- l:~~->-*
~:t 12 11 2~ & 29 23 BA 21 & 29 25 21l & 29 5 27 IA 1e 10 FIGURE 1, n'PE B-3l149A*2 lo3J7S9A-2 6-3J109NA*l nP£ 31749A*2 31759A*2 3ll09N*l A IN MM IJISMANTLING HEIGHT IN MM
SV-178 TYPE 6
- 31749A*2 Rev. 1 6
- 31759A-2 Page 11 of 29 6
- 31709NA*l REF. NO.
QTY. NOMENCLATURE lA 1 lB 1 BASE ASSEMBLY BASE (F316 Stainless Steel) OUTLET FLANGE (F316 Stainless Steel) lC 1 NOZZLE (FJ47 Stainless Steel) 10 1 C SEAL (Inconel) lE 4 WEB ( 316 Stainless Steel) 2 1 BONNET (Al05 Carbon Steel) 3
- 12 BONNET STUD (Al93 B7 Alloy Steel) 4 12 BONNETSTUDNUT (Al94 2H Alloy Steel) 5 1
DISC (A637 Gr. 688 Stainless Steel) 6 BELLOWS ASS EMBLY 6A 1 BELLOWS ( Inconel). 6B 1 DISC NUT ( 316L Stainless Steel) 6D 1 FLANGE (316L Stainless Steel) 60 1 FLANGE ADAPTOR (316L Stainless Steel) 7 1 SPINDLE (347 Stainless Steel) 8 SPRING & WASHER ASSEMBLY 8A
- 1.
SPRING (Tungsten) 8B BOTTOM SPRING WASHER (Al05 Carbon Steel) 8C 1 TOP SPRING WASHER. (Al05 Carbon Steel) 8D 1 PIN (.414 Stainless Steel) 8E 1 ARM (Al05 Carbon Steel) 9 1 COMPRESSION SCREW (SB164 Class A NI-CU Alloy) 9A 1 THRUST BEARING 9B 1 ADAPTOR (A565 Gr. 616 Stainless Steel) 9C 1 SPACER (A565 Gr. 616 Stainless Steel) 10 1 COMPRESSION SCREW NUT (Alloy 875 Silicon Brass) 11 1 DISCHOLDER (Monel 505) 12 1 GUIDE (.Monel 505) 13 2 GUIDE GASKET (.Asbestos/304 Stainless Steel) 14 1 SUPPORT PLATE l316 Stainless Steel) 15 2 SUPPORT PLATE GASKET (.Asbestos/304 Stainless 16 1 WASHER RETAINER (.316 Stainless Steel) Steel) 17 1 FLOATING WASHER (Bl64 Alloy A Ni-Cu Alloy) 18 1 RETAINER CAP SCREW (Al93 B 7 Alloy Steel) 19 1 LIFT STOP (Monel 5 0 5) 20 1 LIFTSTOPCOTTERPIN (Stainless Steel) 21 1 DISC COLLAR (.513 164 Class A Ni-Cu Alloy) 22 1 DISC COLLAR COTTER PlN (Stainless Steel) 23 1 UPPER ADJUSTING RING (CA15 Stainless Steel)
REF NO QTY NOMENCLATURE SV-178 Rev. 1 n.. -- 29 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 ~ l UPPER ADJUSTING RING PIN- ( 414 Stainless S.teel) l MIDDLE ADJUSTING RING (CAlS Stainless Steel) l MIDDLE ADJUSTING RING PIN ( 414 Stainless Steel) l LOWER ADJUSTING RING (CAlS Stainless Steel) 1 LOWER ADJUSTING RING PIN ( 414 Stainless Steel) 4 PIN GASKET (Asbestos/304 Stainless Steel) l CAP (A216 Gr. WCB Carbon Steel) l CAPGASKET (Ashestos/304 Stainless Steel) 6 CAP STUD (Al93 B7 Alloy Steel) 6 CAPSTUONUT (Al94 2H Alloy Steel) l LEVER (Malleable Iron) 1 LIFTING FORK (Malleable Iron) 1 LEVER NUT (Carbon Steel) l LEVER SHAFT ( 414 Stainless Steel) 1 PACKING (Asbestos) 1 PACKING NUT (414 Stainless Steel) 1 COLLAR (414 Stainless Steel) 41 l RETAINfNG RING (Stainless Steel ) 42 l RELEASE NUT (Carbon Steel) 43 1 RELEASE NUT COTTER PIN (Stainless Steel) 44 45 46 1 GAG (Al93 B7 Alloy Steel) 1 GAG PLUG (Al93 B7 Alloy Steel) l GAG PLUG GASKET (Soft Iron)
NOZZLE DISC UNDERCUT DISC THIN INNER DISC LIP SV-178 Rev. l Page 13 of 29 GUIDE COMPENSATOR FLOW PORTS i----~ ~::s;::~.+--+-D I SC HOLDER __..,~., i~~~~~Jjt:t=BELLOWS SPINDLE ~Ek~~~~1--==~7~: VALVE OUTLET DISC COLLAR (f--t:~~~~~-4----+-- SPRING FORCE FIGURE 2 VAL VE CLOSED / '----+-LOW SPINDLE BEARING, MIN. DISTANCE TO SEAT LINE NOZZLE-BASE GU I DE DI A METER
- ide '"='per Port Holes Guide Lower Port Holes NOZZLE-DISC SEAT INTERFACE HUDDLE CHAMBER SV-178 Rev. l Page 14 of 29 I-!-_,..~--~"'"- SECONDARY OR IF I CE
- LDWER ADJ.RING -.Z~~-"4~~"'11' POINT DIAMETER SECTION A-A FIGURE 3 VALVE CLOSED LIFT STOP Support Plate Opper uide/Disc Holder-Inter~
face DISC HOLDER UPPER ADJ. RING Lower Guid Disc Holder vI&ter ace OUTLET MIDDLE ADJ.RING VALVE BODY BOWL LOWER ADJ. RING NOZZLE
LOWER ADJ. RING MIDDLE ADJ.RING GU IDE GUIDE & DISC HOLDER SLIDING INTERFACE & GAP TO BONNET & BONNET VENT SV-178 Rev. 1 Page 15 of 29 LI FT STOP BACK PRESSURE BALANCING PISTON s;J~~~-r71-FLOATING WASHER .._....,__ SUPPORT PLATE i=::::::;:!::;:;::::;::::;:;:::~- PISTON-WASHER GAP DIRECTION OF VALVE LI FT BELLOWS Bellows Disc & Nut ADJ. RING FLOW AREA GAP ~~~--z-- Curtain Area i----o!-->"~~------+-- NOZZLE FIGUBE 4 VALVE OPEN ORIFICE BORE
2.0 DESCRIPTION
OF THE BASIC V~.LVE MODEL 2ol Operation SV-178 Rev. l Page 16 of 29 Valve operation is similar for all 31700 model valves. A cross-section of a basic valve model is shown in Figure 1. The valve consists of a nozzle that is internally contained by an external body structure and a disc that.is held against the nozz*le seat by a mechanical force that is develop-ed by compressing a helical spring. The valve opens on an inlet overpressure transient that generates sufficient up~ ward force against the disc to overcome the resisting spring force. The valve closes when the overpressure decays to a point where the spring force is able to reseat the disc. Review Figures l, 2, 3 and 4. As shown in Section A-A of Figure 3, the valve seat is the nozzle/disc interface. The valve is held in the closed position by the spring force acting through the spindle to the disc a~ shown in Figure 2o This force maintains the nozzle/disc in~ terface thus trapping inlet steam within the inner chamber of the nozzle and disc. When the inlet steam pressure (P 9 ) reaches a predetermined point (set pressure), a vertical force is generated that counterbalances the spring force and slight leakage of steam
SV-178 Rev. l' Page 17 of 29 across the valve seat develops. This leakage is directed into the huddle chamber (Figure 3). Pressure builds up rapidly in the huddle chamber developing an addition vertical force on the disc and disc holder. This additional force in conjunction with the expansive characteristics of steam causes the valve to "pop" open to al:1!1ost full lift. Simultaneously, the steam is directed through the secondary orifice and the adjusting ring flow gap. Steam momentum and the exposure of the entire area of the disc holder to steam pressure causes the valve to continue into full lift allowing the lift stop to come in contact with the support plate. Also, steam bleeds through the clearance at the lower guide/disc holder inter-face generating an addition lifting force on the upper portion of the disc holder. When the valve is open and flowing, static and dynamic forces act as shown in Figure 4. Force F1. This vertical upward force exists due to steam flow against the disc. Force F2. This vertical upward force exists due to dif-ferent pressure forces acting on an annular area defined by the inside diameter of the disc seat and by the lower outside diameter of the disc holder. The Force F2 is controlled by the position of the lower and middle adiusting rings.
SV-178 Rev. l Page 18 of 29 Force F3* This vertical downward force exists due to spring force which is defined by set pressure times seat area plus an additional force of valve lift times spring rate. Force F4. This vertical downward force exists due to steam bleeding through the clearances between various parts (the guide/disc holder interfaces: the disc/disc holder interface: the bellows disc nut/disc holder thread interface). Force F4 is also influenced by the body bowl pressure near the upper and lower port holes in the guide. Force Fs. This vertical upward force exists due to steam bleeding through the lower guide/disc holder interface and expending into the chamber under the upper portion of the disc holder. Steam flow out of this chamber is affected by the position of the upper adjusting, by body bowl pressure near the lower port holes in the guide, and by the upper guide/disc holder interface. When the overpressure condition is relieved,.the inlet pressure in the nozzle decreases (F1, F2, Fs) allowing the spring force (F3) plus the pressure builtup at the top of the disc holder (F4) to reseat the disc thereby closing the valve.
SV-178 Rev. 1 Page 19 of 29 Adjusting rings are mechanical devices incorporated in the valve to change the distribution of forces on the disc and disc holder affect valve opening pressure, valve lift, and valve closing pressure. 2.2 Opening Pressure Opening pressure (also called set pressure or popping pressure) is that pressure where the valve disc begins to lift due to an inlet overpressure transient. Lift begins when inlet steam pressure has increased to the point where the force generated is equal to spring load. The spring load is adjusted by turning the compression screw (Figure 1, Ref. No. 9). In accordance with the ASME Section III Code, the valve opening pressure can be adjusted to be within plus or minus one percent of the required opening pressure. Opening pressure is affected by seat leakage, by the position of the lower ring, and.ambie~t temperatures. Excessive seat leakage caus~ng a* steam pressure build-up in the huddle chamber may cause erratic set pressure or a premature "pop". The huddle chamber and the secondary orifice size are defined by position of the lower adjusting ring. The lower adjusting ring eliminates simmer just prior to the valve popping to insure a sharp and distinct popping pressure. Ambient tempera-tures affect the valve normal temperature profile. Large ambient temperature transients may cause the valve to open outside the normal plus or minus one percent set pressure tel-erance because rraterial relaxation or growth affect spring force.
SV-178 Rev. l Page 20 of 29 The bellows is designed to provide the maximum huddle chamber efficiency. Reduced huddle chamber efficiency occurs only at high back pressure conditions. This could cause* the opera-tion of the valve to become sluggish if the bellows was not designed to allow the valve to be fully open at 3% accumulation. Due to its design, a bellows is a highly stressed component, and can be damaged if subjected. to very extreme adverse con-ditions or severe cycling. Since the bellows performs such a .necessary function in the valve and is not readily accessible for inspection, a backup system is provided. This is shown in Figure 4 as the back pressure balancing piston. In case of a bellows rupture, the area internal to the bellows will be~ come pressurized, however, the piston li.ft stop being attached to the valve spindle (which carries spring force) is now subject to high pressure on its bottom side and approximately atmos-pheric pressure on its top side. This unbalance force assists the valve to open or remain open thereby accomplishing the same function as the bellows except for leak tightn~~s be~ween the outlet and bo~net. Flow will vent into the valve bonnet through the clearance between the piston and floating washer and this will be vented out of the valve bonnet. It is necessary that the valve bonnet vent connection always be left open to atmospheric pressure because the lift stop is designed to act as a piston with the floating washer as a cylinder. Since the effective area of the bellows and the lift stop are designed to be equal, a ruptured bellows will have little affect on _valve operation IF THE BONNET IS PROPERLY VENTED.
2.3 Closing Pressure SV-178 Rev. 1 Page 21 of 29 Closing pressure is that pressure at which the valve will reseat. *This is generally specified as percent blowdown and is expressed by the following equation. Percent Blowdown = popping pressure minus closing pressure popping pressure x 100 When the overpressure condition is relieved, the inlet pressure in the nozzle decreases allowing the spring force plus the pressure buildup at the top of the disc holder to force the disc back on its seat, thereby closing the valve as shown in Figure 3. The force F4 acts as a closing force because back pressure cannot be eliminated. For low back pressure applications, F4 can usually be ignored. At high back pressures, the effect of F4 is significant since it would affect valve lift and capacity. In order to provide total system relieving capa-bility under high back pressure conditions, the 31700 Safety Valve is designed with a patented back pressure compensator piston (part of disc holder), which utilizes and controls Force F5. Force F5 acts on the piston in the annular area outside of the guide diameter. This flow is regulated by the compensator flow ports. The upper adjusting ring is set at the
SV-178 Rev. l Page 22 of 29 factory to insure valve lift and capacity even with high back pressures expected in serviceo 2.4 Capacity Orifice size, valve lift, and inlet pressure affects valve capacity. The basic valve model is certified in accordance with the AS.ME Section III Code to relieveo A rated capacity at a three percent overpressure at rated lift at a steady state con-ditiono Valve capacity is calculated in according with AS.ME Section III Code with the formula W = 5lo5A(l.03P + 14.i) (.975) (0.9) W = saturated steam, lb/hr A = orifice area, sqo in. P = set pressure, psig Lift is the actual travel of the disc upward along the valve centerline when the valve is relieving. Rated lift is that minimum lift at which a valve attains its rated capacity at a three percent (3%) overpressure (accumula-tion). By design, the rated* lift for the basic valve model is the lift that provides a certain area (Figure 4) equal to the area of orifice bore (Table 1). Rated lift is calculated by dividing the orifice bore by four.
SV-178 Rev. 1 Page 23 of 29 The basic valve model has an adjustable lift stop as shown in Figures 3 and 4. The valve lift can be restricted below rated lift to restrict valve capacity. The relationship between valve lift and capacity is conservatively assumed to be linear. 2.5 Material of Construction Figure 1 Nomenclature provides typical Material of Construction for the basic valve model. ~1a terial of Construction for all PSV's are the same (i.e., same material grade). However, the material specifications, to which materials were procured, varies (i.e. AISI versus ASTM versus ASME). Also material form varies (i.e. castings versus forging versus bar stock). 2.6 Design Conditions The basic valve model has a design pressure of 2500 psig and a design temperature of 7QQOF. The valve is designed specifi-cally for saturated steam service. The valve is not designed for, nor tested by Dresser on any other flow media.
3.0 SELECTED TEST VALVES SV-178 Rev. 1 Page 24 of 29 3.1 Two valve sizes are selected for the EPRI Test Program. These are: (1) Model: 31739A-l tJtility: Consumer Power Company Plant: Midland 2 Drawing: 3NC-081 (Note 1) (2) Model: 3l709NA-l Utility: Portland General Electric Plant: Pebble Springs l Drawing: 3NC-045 (Note 2) Note 1. The original drawing for Midland 2 is not readable when reduced to a 11" x 17" format. For that reason, Drawing 3NC-081 has been used in this report. Drawing 3NC-081 is for the Crystal River spare valve. The Midland valve and the Crystal River spare valve are identical. Note 2. The original drawing for the Pebble Springs is not readable when reduced to an 11" x 17" format. For that reason, Drawing 3NC-045 is provided in this report. Drawing 3NC~045 is for the Palo Verde valves. The Palo Verde valves are identical to the Pebble Spring valve except that: (1) The inlet face is a large tongue, and (2) The body drain is a socket weld connection.
4.0 4.1 SV-178 Rev. 1 Page 25 of 29 DESIGN VARIATION BETTl'7EEN PWR PLANT VALVES AND SELECTED TEST VALVES Valve Models A review of Table 2 will show that there are five valve models. These are: ( 1)
- 31709KA, K orifice (2)
- 31739A, 3 orifice
( 3)
- 31759A, 5 or if ice
( 4)
- 31749A, 4 orifice
( 5)
- 31709NA, N or if ice 4.2 Comparison of Valve Models Each larger size valve is a scaled-up version of the smaller valves.
All valves are similar in configuration and based on the same design philosophy. Within each valve model, there are some critical variations. These are:
- l.
Bonnet Material Form
- 2.
Body (Base) Material Form
- 3.
Inlet Size and Rating
- 4.
Outlet Size and Rating
- 5.
Lift 4.3 Bonnet Material Form Bonnet were originally manufactured from a casting. Cast bonnets were replaced with a bonnet fabricated from a solid forged billet. The casting were ASTM A217 Grade WCB. The forgings were ASTM Al05 Grade II Carbon Steel or ASME SA105 Carbon Steel depending on the applicable ASME Section III Code. The two bonnets, cast or forged type, are very similar in con-figuration and considered structurally equivalent.
SV-178 Rev. 1 Page 26 of 29 The original valves (Model 31739A-l) for Palisades, Oconee l and 2, and Three Mile Island 1 Nuclear Plants have bonnets of the cast type. Spare valves for TMI #1 have bonnets of the forged type. All other valves have bonnets of the forged type. 4.4 Body Material Form Bodies were originally manufactured from a casting. Material was ASTM A35l Grade 316 stainless steel. Later in valves of the same model number, a body made from a solid forged billet was used. Material was ASTM -~~~1~ ~rade F3l6 or ASME SA182 Grade F3l6 stainless steel. More recent valves, models 31749A~2 and 31709NA-l, have bodies made from a closed die forging. Material was ASME SA182 Grade F316 stainless steel. The original valves for (l) Calvert Cliffs 1 (Model 31739A-l) ( 2) Palisades (Model 317 39A-l) (.3) Oconee 1 & 2 (Model 317 39A-l) ( 4) Main Yankee (Model 31709KA=l) ( 5) Three Mile Island 1 (Model 31739A-l) and ( 6) North Anna 1 & 2 (Model 31759A-l). Have valves of the cast type. The two original valves for Calvert Cliff 2 (Model 31739A-ll were cast and forged types (one of each). Spare valves for Calvert Cliffs l and 2 and Three Mile Island 1 have bodies of the forged type. All other valves have bodies of the forged type.
SV-178 Rev. 1 Page 27 of 29 The bodies of the cast type and the forge type are similar in configuration. However, the body bowl wall thickness of the cast type is thinner than the wall of the forged type. Thus the cast type is structurally weaker. 4.5 Inlet Size and Pressure Rating See Table 2. 4.6 Outlet Size and Pressure Rating 4.7 See Table 2. Valve Lift The following valves were shipped from Dresser with valve lift restricted below rated: (1) Palisades Model 31739A-l; full lift is.45; restricted lifts of 0.339, 0.344 and 0.350 were provided. (2) Catawba, Model 31749A-2; full lift is.563; restricted lift of.531 was provided. (3) Three Mile Island 2, Model 31759A-l; full lift is.516; restricted lift of.439 was provided. (4) Nuclear One, Model 31759; full lift is.516; restricted lift of.385 was provided. According to our records, the valves for TMI-2 were adjusted on site at a later date to remove the li~t restriction.
5.0 CONCLUSION
SV-178 Rev. l Page 28 of 29 Although there is a possible argument for selectinq for the tests valves which have been installed and in use for a number of years as opposed to newly manufactured valves, it would be difficult to achieve this in practice. There is first the problem of obtaining valves for prolonged testing which are at present used by utilities. There are also the handling and control difficulties which will be presented by a valve which is highly radioactive. Any attempt to decontaminate the valve would tend to nullify the tests. In fact, it is believed that there is no real need to become involved in such a poten-tially troublesome test program. The affect of radiation aging of the materials used in valve construction is well known and has been defined by many reliable authorities which it is unnecessary to quote here. The total radiation dosage is comparatively small and those operating components which may be the most affected are replaced under normal maintenance procedures at regular intervals-.. -This, also applies in the c~se of we.ar or. f*atigue: There is very little wear experi-enced in the valve in general because of the limited number of operating cvcles and certainly, in the case of PWR's there is no possibility of fatigue failure from vibration. The 3l739A-1 and the 31709NA-l valves selected for the EPRI testing program are representative of valves in service or intended for service in the PWR plants listed in Table 2.
SV-178 Rev. 1 Page 29of 29 The first of these valves, the 3 orifice is the most common and has the longest service history. The N orifice is the newest and largest and is expected to be the valve used in new plants. Unfortunately, the two variations of the 3 size, cast or forged body, may present a problem. For normal opera-tion on saturated steam the valves are the same, but it is possible that under extreme conditions of compressed flashing water there may be some difference because of body configuration.
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15 PULL SPA'C1:: d-r-. I' ..... Ai:.K ~qc,..ooo - s2'-.... .JStN e, v1eG?.O-LOOL "'~~ "8 __________________________ __,,* I 3 PULL SPACE 1-------------------------22~- F~ 1!,200 LBS. EST1MATED DYNAMIC REAC/ION FORCE ON VALVE e b"-1soo#ANSl r MODIFIEO FLANti-E ---~~ _,,: 'oo* ~111s1 ~~..f......!!:+/-*.g_' / EB 2.4 2.3
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- as 8E. s1:@
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- ~ SC.REN 611'1(1(( 110.
SALLLCC.I(,..IN I 5,Z_ I.JAME Pl...'°'TE I 95 5PAC£-",SPl!l"1G ii tJOTES: 1, VALVE FLOW C.ONFIC.UR:ATIOtJS DE51G.t>JAT/0/IJ "'9C Mlt.J.. VALVE FLO...,. '°'!<:.EA., 3.51:;! ttJl. '"'II tJ LI FT OVE~ SEAT DIA. itATIO" 0.3~i<. ,; 2., SET PRE.S~UR:E TESTER SUl"'PLIED, OtJE P~ POWER PLAN r. ~. I.JON,- DESTi;:UCTIVE. EXAMINATIO/..J A"IC !i!EPA!~ Of" C.ASTING-NUMBER !000048 PER PARAGRAPH N-32..;> A':.ME BOIL.ER. AND PRESSURE VESSEL C.DDE 5E.C.r10N Ill. 4-. RAl'J MATER.JAL FOi'<'. ITEMS '4, 7 (~"EN MADE FR.OM BAI?. STOCK) 8, 9, 13,IG,AND f,fu ULTRASONICALLY
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- ~ A5ME BOILE~ AND PRESSURE VESSEL CODE A5 A "llt.JIMUM.
ITEMS OTHE..'i: TH""N C.l\\Sil/.J(, 600048 l<:EG,UIRIN(, '-F! PE.ii.' T>.: 1004 SHALL. BE PER.FORMED IN ACCORDANCE AilTfl TR llbB AND MEET THE. ACC.EPTANC.E STANOAADS
- ~ TR 1004 7
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Ol"NOIES rTEMS 70 BE U.S0,11.S ,,S.PANE PARTS. C/UAN7'TlS I Al....TEC:NAr:E I i s-.. ~.S"-5,...... I LIST OF MATERIAL QUANTITIES FOR ONE. UNIT 'T'ill "'ST'>-'1-,.,-'1..7" ,,.... ~.. ~.... 22 WA5HER.*TA8 I 23 F/LTi!R Ass'r I 2.003l51.:.0U3l5 25 SEAT-PILOT I 5rl. Sr. '"~'.tt.ii.1. 100500 oosoo-* 2'1 DI.SC-PILOT I ST'L.sr.~i;;,"*J;J;/J Z.00l4Z tu 32 5~//JG I "~!,u- ~0453 OMSl; 33 5PALEK f'RELOAO I ST'L ST. 1"'~7.;'.fu. ~ iijo 34 NUT->NJLDDOW/IJ I. ~NEL l~T;i'64 iOObl3~!.u.:Ji 35 RING--'D.JUSTIU'- I Cjf,/J;_°>J ~~'1-,.:.:.f~ 00450MI\\&~ 3t. KEY-618 JIEAO I CRES ~0;'11;'"* IOQ.4.5~ ~5'- 37 ~<f.t-<<:'f!"o~ ( C.OMM'L n~:i;,.,_.."9-----+-1-----t"-'-'--*-*---~-~--'--1' 41 6AGGING DEVICE ( "fl 57 GASKET 4 .'~.'.;!'!~ Co*,..*L. ~ - lilrr.All-C /?.~-/SJ ~~.l4... 0.D.><.l!'i'Till: Z '5P'41e'E::S ,,. 58 GA5KET 2 +' +' -i-t*-+- '---t-r---t--f---+-f--lt'~'~-l~>=Nt;;\\~~-:C>'c'='<~~-L~*='='=~t-------j-=I ='~P~"=-"=E;---j ,._ 5, GAS<Er Z. I j I R-f-/Sf' "iii.c>.>.2.~o.~.Lt!.&1111 I :SP~J<:E ".f. 60 GASKEET 2 I J"!_.'!,_:.::; ~ ~rrr...u l<'.4*15( 1\\_a.tl:l:..Qll..t.1t!i'!ll I 5PARl! fl 61 0-!:.ING 2 .'H"'CSr: ""f~."J'~ f SPAEE 1'162 PAC.KING 2 ~~~ti.:i~ C.ICAN1i't.-'19Sl~.xno.1d<t*- 6 SPARES 65 CANCJ.c>Y 66 CAP 1'"167 D-tf:IA/6 '00 WASHE~ z I sr'L. sr. Co.<1M-. ,}~*J I I 11;;'"" COMJtf'l. 100'-'ll I~ ~~ I
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- IFICI l*I HISTORY '
ULYE CODE: 2.545 .... llCllfl ... -.. ~:-~u~;~1~~:;.~~¥fiv**:~~- 2-112-31139A-1-xs-XFc1.:.xos120 mn SEllAL NO: BL-08899(TAG. No:* 1 RCY-9F) BL-08900(TAG NO.. IRCV-Bf)
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C&LCUL&TIONS, REP1lRTS, INSTRUCTIONS IND PRDCEDUP.ES REQUIRED FOR YERIFICITIDN OF IESl;ii, IUUFACTURE, TESTING IND QUALITY &SS~RAMCE REQUIREMENTS. CISTDllU lPPIOY&L IEOUllED NOTE NOTE NQTE I NOH.L NOTE I' NOTE I .llllIE J NOTE 2 NOTE 2 APPROVAL SEQUElltE CDOE DDCIJllfMT ND. SP-23 RG-507 -- __, ---- DfSCtlmDM LIOU ID PENETRANT INSPECT I ON PROCEDURE RAO I OGRAPH IC I ~SPECT I ON PROCEDURE SP-20 . l., *,
- ULTRASONIC INSPECT I ON PROCEDURE
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- 10. a IWTE I SHEET 5 I
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- 3. TORQUE VALUES ARE BASED ON 6000 PS I BOLT STRESS PER ROUND.
... __ -*.. _!-,. TDRQUE VALUES APPLY ONLY TD SPIRAL WOUNIJ SUI NLESS STEEL GASKETS 111 TH ASBESTOS F tLLER ANO WI TH COMPf;ESS I ON GAUGE RI NG.
- 5. TORQUE VALUES ARE SUITABLE FOR ORDINARY WRENCHING.
- 6. TORQUE VALUES ARE PURELY THAT VALUE REOUIRrn TO MAKE A TIGHT FLANGE JOINT-ND CONSIDERATION HAD BEEN GIVEN TO LOADING IHI CH MAY BE REQUIRED TO ALI 6N PIP I NG OR A CC OM DOA TE THERMAL PIPING STRAINS.
"\\i~*;! ;i.. i**~ -n*...,
- :. ~:i~'
AUXILIARY* VIEWS ii
- 1'*....
REF. NO. 33 .;* ~ * .. \\.. * :'L..
- 1:**..
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- ND INST*UMINT IMVIStOM Alf.U"IDRU
- .cusri.1SPCCIFICAT10111 142J~p(,;fit.
.. ~ROJECr S~EC. FOR mm VALVES : ..A_* . :;j *. QENERAL ENGINEERING SPEC. FOR* '.* SAFETY VALVES . *.. '..,.:;'.~:,:: J PROGRAM SPEC *. . CLEANING & PAINTING SPEC. IUIEI UGI. DITE a.A. DAT[ ~f,IJ-f':i..;7~ ~~~ t°'3o/J' p'u1,, ~~~ ~ ~h" \\° &'m -~ r-~1~ ~,~- f(~~ DI CUSTOMER SPECIFICITIDN CHANGES REY IEIED BY REY ENG. REYIEIED BY REY. ENG * -.-.:~ '..::~ llOTES: -I DOCUMENTS TO BE SUBMITTED FOR REVIEW AND INFORMATION. THESE DOCUMENTS SHALL BE CONSIDERED APPROVED IF NOT RETURNED TO DRESSER WITHIN 45 WORKING
- DAYS AFTER RE~El?T BY Ctn!BUSTION EllGINEERING.
l* 2.*oocuMENTS SHALL NOT BE SUBMITTED BUT AVAILABLE FOR REVIEt AT DRESSER. . *~
- '~.
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~ t~ ~*.* COYERMING DESIGN REOUIREIENTS
- ' OESCI IPY IOI EDl*IOM Ol:iEY.
AOOENOUI LEYEL GI CUSS ASME B r. PV COO~* SECT~~~ ill ANSI 816. 5 STEE~ PIPE FLANGES AND FLANGED FITTINGS. 1974 1968 UllMER 75 CLASS I SOD'I& 2500# CASES OF ASME BOILER AND PRESSURIZER VESm CODE. CAS£. llll CAlCliLl*IONS', REPORTS, INSTRUCTIONS AND PROCEDURES REQUIRED FOR YERIFICUIOI Of DESIGN, MANUfACTURE, TEHING UD QUALITY ASSURANCE REQUIREMENTS. CUSTOMER APPROVAL REQUIRED NO*.*.*.... :. NO NO -~ - ' APPROVAL SEQUENCE
- CODE, B (NOTE I)
B (NOTE I) DOC Ullf NT llO
- YA-016 QMT-1 B.(NOTE I)
QPT-l-NC045/046
- B (NOTE I)
QRT-1 -9:*cNorr-n --ouT:.:r-.---. -- NOTE 2 . NOT£ 1z NOTE 2 QHT-3 IS-JU IS-305 IUCllPllDI VALVE APPLICATION REPORT MAGNETIC PARTICLE EXAM. LIQUID PENETRANT EXAM. RADIOGRAPHIC EXAM. TRASONIC' EXAI:- - HEAT TREATMENT PROCEDURE WEllllN;,ROCEDUllE (l'I TD l'I) IELDING PROCEDURE(PB TP PB)
- f
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YES YES YES:. YES: YES. CL-I 2-NC045 HY-24-NC045 FC-60-NC045 CLEANING INSTRUCTION HYDROSTATIC TESTING INSTRUCTION PAINTING SPECIFICATION PACKA~IN6 SPECIFICATION FUNCTI GNAL STEAM TESTING INSTRUCTIONS AIR BACKPRESSURE TEST INSTRUCTIONS MINIMUI IALL VERIFICATION ~- ~
- 1
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- PT-33-NC045 75S-317-14 HOT SEAT LEAKAGE TEST STRESS REPORT
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lliTERllL EXANlllHIOHS° AH!! TESTING IElD ~EIT ~IK!:NSIDNlL CUSTOMER
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- O II IELD ADD CERT.
I
- aELLlllS CERT.
n HIRDFlCING ROD CERT. AUTHOR11.ID~C2!1!:.!l!. RAI g_ INSPECTOR llATERllL ~ WITNESS i ~ "' CERT- ~~ INDICATED ~ IFICITID! !;;; BY COL. ! ffi S :;;; COOE g:~ MO. c.o>
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- I I
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- 9.
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- I
- 39 2
I SUI-FINISH BASE IOZZLE C SEIL FINISH MACHINE BASE & NOZZLE BASE FACING
- DISC a I SC BAR STD CK ROUGH llCH INE FINISH MACHINE BELLOWS ASSEMBLY BELLOWS IUSC NUT STOCK CODE I - STOCI ISSUE FDR FINAL ASSEMBLY c - FLODR srou t - nmtu m*
542285 251510 5151009 542295 342205 422D5D3NC045 45 I 35B 5135801NCD45 ll-IDO. 220023 D4DD 451358 451359 45136D 5136001 451360 5136001 451360 I - ISSUE FH SUI ISSEllBLT e11 INCDNEL X-750 , -(SILVER PLATED) ASTM A637 GR. 6B8 HDT FINISHED ASME SB16B I NC OH EL 600 DR SB443 INt~~EL 625 i lSME SAIB2 F316L ST.ST. QUT-1 QPT-l-MCD45 P HY-24 NCD45 HY-H HC045 RC35 M IH. QUALITY CONTROL PLAN CONTROLLED COMPONENT PARTS OHT-2 OHT-3 8 LISTING p SP-64 p HCD45 SP-64 NCD45 SP--64 NC045. p 14 I X I 14 I I 2, B 8, 2,4 1,9 2,4, 5.8 -~ \\ PT IACHINE AREA DNLY NDTE 2,4 SHEET - !MITE 9. SHEET 7 IDTE 8, SHEET 7 NOTE 4, SHEET 1 ~. " .r' CONSOL! I 0
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- 11 12
. *x FLANGE FLANGE ADAPTOR ASSEllSLE BnLOWS SPINDLE SP iNDLE BAR STOCK WELD ROD(HARDSURFACING) HARDSURFACE llACH 1.~E ~mo LE SPRING & IASHER ASSEI. PO~CIUSED SPRIN& TOP SPRING llSHER ISSEllBLY t BIRST&CA IACI! llE IASHEA BIRSTQO AR; RQD IH~* ARit TU HST!Ell NOE OF WELD BOTTOI SPA I ~G WASHER BARSTDCK
- llCH 1ME BOTTOI SPRING WISHER MACHI NE ~!SHERS TD FIT SPRING BONNET ISSY.
BONNET FORGING llCHIME BON~ET I*- I COIPRESSI Ill SCftEI CDllP. SCREI BARSTOCl CDIP. SCR El IA CH INE 12 BONNET STUDS 451360 5136001 . 451360 5136001 451360 451370 5137DDIMC045 It *100 220010-21 396 3961116 451310 41369131C045 SD-119 Q-735EUMCD45 35137 3 5137301NCD45 11-108 220003-20 351373 IJ-IDD 22DDO:l-.2D 242311 4231101 398 3962608 11-1 DO 220003-20 251430 5143DDIKCD45 451375 51375DINC045 251314 5131401NCD54 451315 351312 51312QINC045 U-IDD 220009-20 351312 319 3890102 NC045 12 BONNET STUDSC PURCHASED) 389 3890102. 12 lZ BONNET STUD NUTS BONNET STUD llUTS (PURCHASED) STDCl CllOE 390 3901417NCD45 380 3901412 I - STOCI ISSUE Fiil F llllL ISSEIBLY I - ISSll Fiii SUI ASSEHU C - FLDOtl ST llCI D - UPEISE ITE* 8 UTERllL ASllE smo *316L ST. ST. ASIE SAIB2 FolSL ST.ST. l'llRCHASED AS FINISH ASSEMBLY ASIE SW 9 TYPE 341 SulllliDN ANHllfll lllTERllL EXUINITIDNS ANO TESTIN& IUI
- IT DllHSIDMAL CUSTOllEI_, IUTHOllliED TRICEIBILITT If llllYIDUIL COllPDNENT FARTS SPEC.
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42.
QUALITY CONTROL PLAN CONTROLLED COMPONENT PARTS QHT---11 P QHT---11 a LISTING DlllEllSIOMAL CUSTOllEI AUTHORIZED TRACEABILITY CHECK llTllESS INSPECTOR.. lllO IClTED llTNESS - a IT COL. IND IClTED NO. Bf COL. = ~ § INST. 10. S (NOTE I) NO. IAI i.,. UTEl IAL CEil-IFICATION ~ CODEg ~ I 7' 9 5, _9 IPPLI Clll! IOTES PURCHASED ITEI (109' llllEJUIOI CHECK) NOTE I 0, SHEET NOTE: 10, SHEET 7 ft.... ~ ,*t',* . i CON:,QLIOATEO PRESSURjLER SAFETY VALVE I "'DUSTOIAL VALVEI p~~* AMD INST*UMUIT E~~,,.. DfVISIOM 1 ll'EUNDllll !lDUISllNI ORDER CONTROL 016. ~0. - I SHE£T I m.ao. Ei6. SEIV ICES CMECIEI 11: llTE: 8-2! *7tf,
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- *.*.. tn* !:!
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uumu CLEUll& Alll ULYE TESTING CllSTU.I llTllUS (MOTE I AUTHDllZED ll1SP£CT!Ja II TRESS DAU. PACKAGE DOCUIEIT IESCI ll'TIDI YALVE ASSEMBLY lNSTR. CLEANING SPECIFICATION FUNCTIONAL TESTI N6 A IR BACK PRESSURE TEST HOT SEU LEAK TEST PACKAGING llOCEUlllE TES H TES lio TES MD AS-59-NCD45 I I Cl-12-NCD*5 I.* I PT-69-llCD45 II I PT-43-flCD45 I X PT-33-flCD*5 - H I PC.:.5*-NCD*5
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.. *:-:*:::-:.:::-:::::.'::--:':;:.:. ~*.: A PPL I CADLE NOTES ). CERTIFICATION OF CDriPLIANCE --****.. * ~-* ---+----~--.;:..-M * ***.-*"** ** ' * *** - --~ ----~- -***~- CERTIFICATION OF COMPLIANCE
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SEISMIC TEST SPEC. REVIEI OF RADIOGRAPHIC FILll. ANO EJNAL OOCUMENTATIO . ~.-. .H. BEFORE SHI PMEl!T . ~-
- ~.
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SPECIAL *OTES ." 1.-;:: * ._*... *'.. '~":~.I ~-*~~ I. llTNESS POINTS: llTNESS POINTS SHALL BE 0£SIGNATED BY THE LETTER II FOLLOWED BY THE COLUMN NUMBER OF THE TEST OR EXAlllNATIDN TD BE llTNESSED: (EXAMPLE 12) CUSTOMER. SHALL BE GIVEN 4B HOURS NOTICE EXCLUDING SATUR!rAYS, SUNDAYS AND HOLIDAYS. PRIOR
- --~* ~. -*----
TO PERFORMING TESTS DR EXAMINATIONS. IN THE EVENT THE CUSTOMER REPRESENTATIVE HAS NOT ARRIVED. AT DRESSER.WITHIN THIS.
- &HOURS, WITNESS WILL BE CONSIDERED WAIVED. DRESSER IS REQUIRED TD SHOWN EVIDENCE OF NOTIFICATION.
I --:*.*** ~*.... *-:*.... **:****.-**...
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-:-~---**--::-**,,~**:-* . HOLD POINTS: HOLD PD I NTS SHALL BE DES I GNA TED BY THE LETTER H FOLLOWED BY THE COLUMN NUMBE~ OF THE TEST OR EXAM I NA Tl ON TO BE HELD FDR WITNESS (EXAMPLE H2) CUSTOMER SHALL BE GIVEN 72 HOURS NOTICE EXCLUDING SATURDAYS, SUNDAYS.AND HOLIDAYS, PRIOR TD PERFORMING TESTS OR EXAMTNATIDHS. *THE-TESY-&R HAMINATfON Sl:HL BE HELD *FoR*cusroME.U!JNESS, UNLESS SPECIFICALLY IAIVED IN WRITING. i.. -*2:*JllMENSI DHAL EXAMINE l!F. BASE MUST QE PERFORM PRI DR TD INSElffiNGNOZZL"Elt(N !!~SE. ---------**-:-::..::~::.:~_::::.:,~:..:.::,._:;. ~~ '**~*~ '.*,..
- 3. llATERIAL TO BE TESTED PER ASTll A262-70 PRACTICE E.
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~. i -'-- --- ** PRESSURE CONTAINING PARTS llLL BE HELD FDR DHE llALF llOUR AT HYDRO TEST PRESSURE,. ~..... ~ :** .... ~--* :..-;*-~- -* -::- . : 5: MEASUREMENT OF DELTA FERRITE IS REQUIRED AFTER WELDING ANO PRIOR TD FINAL MAC~INING DF BASE ASSEMBLY. MEASUREMENTS SHALL BE TAKEN ALONG THE WELD CENTERLINE AT FOUR EQUALLY SPACED POSITIONS WITH A CALIBRATED HISTRUMENT. EACH MEASUREMENT SHALL BE ND LESS THAN IS BY VOLUME (1FN) AND THE AVERAGE OF FOUR MEASUREMENTS SHALL BE ND LESS THAN 3% BY VOLUME (3FN).
- 8. MAX I MU!t CARBON CONTENT SHALL BE
- 065%.
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- 1.
~ *~ ..-.:**1. DOUBLE FILM RADIOGRAPHY REQUIRED. DNE SET FILMS REQUIRED FDR CUSTOMERS RECORDS: ~-.
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It TEST SPECIMENS SHALL BE PREPAllED "FROln:mnEAT 1lf"l!ATERIAL FROM.IHICH THE*PARTS ARE 11ACH1tlED, Sl'£CiMENS**AilE* Ta BHlEAT ____ _:_ __ _'_ TREATEll TO QltT-3 SPECIMENS AND MECHANICAl TEST ING (-TENSI ON-AUO.-HARDNESS-TESTS.} SHALL !IE.flt ACCORD~NCE WI Tll.ASTli Al7 L--*------ THE. YIELD STRENGTlt SHALL BE DETERMINED BY THE OFFSET METHOD AS DESCRIBED IN ASHI A370. THE MECHANICAL PROPERTIES SHALL NOT
- - **-** BE LESS THAN THOSE SPECIFIEO IN*TABLE 3 FOR ASME SA637 GRADE 6BB TYPE 2 EXCEPT HARONE,SS TO BE RC35 MINIMUM.
- 9. THE FOLLOWING NOTE IS TD APPEAR ON THE PURCHASE ORDER F.DR MATERIAL:
MATERIAL SHALL BE CAPABLE OF BEING HEAT TREATED TD OBTAIN GRADE SB~. TYPE 2 MATERIAL EXCEPT HARDNESS TD BE* RC35 MIN
- i'o. TEST SPECIMENS SHALL B~ PREPARED FilDM EACH HEAT OF MATERIAL FRf*~ WHICH THE PARTS ARE MACHI.NED. SPECIMENS ARE TD BE HEAT TREATED TD QHT-lL SPECIMENS AND MECHANICAL TESTING (TENSION AND HARDNESS TESTS) S~ALL BE IN ACCORDANCE WITlt ASTlfA°37iJ.
- -_.. *. THE YIELD STRENGTH SHALL BE DETERMINED BY THE OFFSET METHOD AS OESCRIBEO IN ASTM A37D.* THE MECHANICAL PROPERTIES SHALL NOT BE LESS*
,:* '.X' THAN THOSE SPECIFIED IN TABLE 3 FOR ASTM A565, GRADE 616,COND.ITIDN HT, EXCEPT HARDNESS SHALL BE RC 36-*2.. . '~' :. '
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- -*QUALITY CONTROL.
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SHEET REY. NO. 8 EK.SEU ICES CllEC~I St;
REY, NO. RElflS~ NO. EHB25 3/2177 .* 1.., .. * ~ ! .. ~ -REJIS I ON RE CORO ouca IP! 1 OH RELEASED FOR SUBMITTAL TO CUSTOMER REL EASED FOR MATER I AL PROCUREMENT ANO MAHU FACTUR lHS. ON SHEET I: ~ IPPROYllS ENG I NEER I HG .... ~ ~ ~- ON SHEET 6: 1.REf.H0.11 DELETED PIN SUFFIX -NC045.
- 2.REF.ND.11 EVENT 1 DELETED UT.
. i1 ~- I :.*,. ! ' ;. -~ .. *..,~. ~~SHEET 7:; 1.BEF.Nll.16 QTY IAS 3 ANO PIN GASKET IAS RING PIN. 6A~ET. ~ 2.ADDED N0.. 48 & REY.NO!S.. 49 THRU.59..
- 3.REF.N0.49 PAINT WAS 1235939,PAINT WAS CARBO.ZINC 11~*
- 4. PC-68-NC045 WAS PC-60-NC045,-ADOEO PT-70 5-HOTE B, REWRITTEN.
. '6.AS-59-NC045 WAS AS-24-NC045. .. ~,* 7.AODED WITNESS & HOLD POINTS TO PT-57-NC045.PT-43-NC04
- AND PT-33-NC045.
8.ADDED:REVIEW OF RAOIOGRAPHJC FILM & FINAL DOCUMcNTAT I ON BEFOR( SH I PMENT. 9.AODED DRESSER JS REQUIRED NOTIFICATION TO NOTE I. 1 O.ADDED NOTE 1 TO CUSTOMER WITNESS COLUMN HEAD I NG
- 11 *.IOOED NEW ITEMS 60 12.WPS-B WAS WPS-5B.PT-69-NC045 WAS PT-57-NC045.
13.ADOED NO WITNESS TO AS-59-NC054,CL-12-NCC45 PC-54-HCG45 & PC-6B-NC045. ~: ~LTUSSURINCE REW. NO. . RELEASE HO *. -~* -'1..EH1'0Ri~ ii... ~1~:~_... *:;;*.?;' .:. ~ : *':'
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