ML18047A449
| ML18047A449 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 10/09/1981 |
| From: | Taylor D, Thibault D, Zahorsky J CROSBY VALVE & GAGE CO. |
| To: | |
| Shared Package | |
| ML18047A442 | List: |
| References | |
| 3921, 3921-R01, 3921-R1, NUDOCS 8207160344 | |
| Download: ML18047A449 (14) | |
Text
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TEST REPORT NO. 3921 REVISION l JUSTIFICATION REPORT OF EPRI TESTING OF CROSBY STYLE HPv-S~
POWER OPERATED RELIEF VALVES PREPARED BY: __
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SENIOR PROJECT ENGINEER APPROVED
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/? *J. *R./ZAHORSKY
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- J CHirt ::~mn;EER-S *.\\FID VALVES DATE:
OCTOBER 9, 1981
- 8207160344 820401
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PDR ADOCK 05000255 P
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VAi.VE a GA G it CROSS'!'
CR::JS.8Y WlllENT1'4AM, MASS
- =st Report ~c. 392~ Revision l Page 2 l.l This report provides within a single document the information listed below:
l.l.l A swmi:ary of the Crosby models and the quantity of such models used in or intended for use in domestic PWR Nuclear Power Plants as power operated relief valves.
l.l.2 A listing of all Crosby Safety Valves used in or intended for use in PWR Plants for power operated relief valves.
The listing includes the utility, station, valve size, Crosby Order Number, quantity per plant and drawing number.
l.l.3 A brief description of valve perfo1:'1118nce including a description of the main internal parts. A drawing ot the generic valve model is also included.
l.l.4 A listing of the valves selected for the EPRI tests which includes the valve origin and data sheet drawings*.
l.1.5 A listing of all de.sign variations between selected test valves and valves used in or intended for use in PW1t Plants as power operated relief valves.
An explanadon of effects on perfor::a.nce due eo each specific design variation is included.
l.l.6. An explanation cf validity of selected test valves to represent all or a specific portion of all Crosby Valves used as puwer operated relief valves.
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R 2&
J CROSSY VALVE a GAGE C0).4?.ANY CROSBY WR.ENTi1AM, MASS I Test Report ~o. 3921 Revision 1 Page 3
- 2.
Introduction 2.1 Tabulated below is the quantity of each valve model provided by Crosby for use as power operated relief valves.
The complete valve listing of Paragraph 2.2 of this report tabulates the specific design variations of each model.
The Crosby Assembly Number denotes the model number.
All valves listed below are the Crosby Style HPV-SN Pressure Relief Valve.
Assembly No.
54890 N56969 Quantity of Plants 1
2 2.2 The following tabulatioq is a detailed breakout of all models of Crosby Style HPV-SN Pressure Relief Valves supplied for use on or intended use on PWR Nuclear Power Plants as power operated relief valves.
Drawings H-54890 and DS-C-56969 are included as part of this report on Pages 9 through 11.
Crosby Factory Order No.
Nl01711 N300828 N300829 Utility Toledo Edison Virginia Electric Power Co.
Virginia Electric Power Co.
Station Davis Besse Unit No. 1 North Anna No. 3 North Anna No. 4 Quan.
Crosby Crosby of Assembly Drawing Valve Valves No.
No.
Size 1
54890 H-54890 2-1/2 x 4 1
N56969 os-c-56969 2-1/2 x 4 1
N56969 DS-C-56969 2-1/2 x 4
I l
CF10S;BY J
r CROSSY VAL.Vi! a GAGE WR ENTliAM I MASS CON PAN Y
!es: Report No. 3921 Revision l Page 4
- 3. Descrintion of Valve 3.l Valve Construction 3.1.l Figure l is a generic illustration of the Crosby Style HPV-SN Pressure Relief Valve at Virginia Electric & Power, North Anna 3 and 4.
Part numbers in parent~esis in the following ref er to parts in Figure l.
3.1.Z Inside the main valve body (l) is housed the lower portion of the nozzle (5), disc (4), guide (3) and spring (6).
3.1.3 The pilot valve body (2) is welded to the main valve. body (l).
- The
.nozzle (15) is retained between the pilot valve body (2) and the b~nnet (ZO) by the bonnet studs (12) and nuts (13).
3.1.4 Housed in the noz;le (15) and bonnet (20) is the disc (14), spring (21), spring wash~r (23) and retaining ring (22).
Also contained within the bonnet by the bellows top adapter (18) is the bellows (17) and the disc actuator (19).
3.l.5 Attached to the main valve body (1) by the bracket studs (27) and nuts (26) is the solenoid bracket (28)p to ~hich the solenoid {35) and solenoid cover (41) is*attached.
3.l.6 The adjusting bolt (31) is threaded into the lever (33) a.nd held in place by the adju~!:ing bolt lock nut (32).
The link (29) connects the lever (33) and solenoid (35).
3.2 Valve Operation (See Figure l) 3.2.l Under normal operating conditions, the Inlet Port "A", the Cavities "B" and ncn 9 and the Pilot: Valve Connecting Cavity "D" are at the same fluid. pressure.
The disc (main valve) (L:-) seats against the nozzle (5) seat since the p'l:'essure in Cavicy "C" is greater* :han the pressure in Discharge Port "E".
The disc (pilot valve)(l4) >'eats against the nozzle (pilot valve)(l3) seat since the pressure in the Connecting Cavity "D" is greater than the pressure in th'! Pilot Valve Discharge Port "'F".
3.2.1.1 When the solenoid (35) is energized, the solanoid plunger actuates ~he lever (solenoid)(33) causing the adjusting bolt (31) to strike the end of the disc actuator (pilot valve)(l9).
This action unseats the disc (pilot valve)(l~) and allows steam to pass through the vent holes in :he nozzle (pilot valve) (13) to the Pilot Valve Discharge Port "F".
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a G A G E W~ENT~AM, MASS COMPANY Test Report ~o. 392I Revision 1 Page 5
- 3.
Descriotion of Valve (Continued) 3.2 Valve Ooeration (See Figure l)(Continued) 3.2.1 (Continued) 3.2.1.2 When the pilot v.alve opens, pressure in Cavity "C" is reduced and the greater pressure in Cavity "B" cao.:.ses the disc (main valve)(4) to open.
3.2.1.3 When the solenoid (35) is de-energized the solenoid plunger returns to the original free position.
The pilot valve closes causing pressure to again build up in Cavities "D" and "C",
thereby closing the disc (main valve)(4) *
- ~st ~epcr: ~o. 392! ievision l
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FIG. I ASSEMBLY OF PRESSURMATIC VAiYE STYLE HPV-SN Page 6 I ct
c OSBY
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I CROSBY VALVE: a GAGE WRENTHAM, MASS COMPANY I Test ::.eport No. 3921 Revision 1 Page /
Pc.
No.
1 2
3 4
3 6
7 8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Name of Part Body (Main Valve)
Body (Pilot Valve)
Guide (Main Valve)
Disc (Main Valve)
Nozzle (~lain Valve)
Spring (?fain Valve)
Seal Ring (Nozzle)
Outlet Flange Nuts Outlet Flange Studs (Outlet)
Stud (Pilot Valve)
Nut (Pilot Valve)
Disc (Pilot Valve)
Nozzle (Pilot Valve)
Seal Ring (Pilot Valve)
Bellows (Pilot Valve)
Bellows Top Adapter Disc Actuator Bonnet (Pilot Valve)
Spring (Pilot Valve)
Retaining Ring Spring Washer Gasket (Pilot Valve Bonnet)
Gasket (Pilot Valve Nozzle)
Pc.
No.
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 FIGURE 2 LIST OF XATERIALS STYLE HPV-SN
!fame of Part Nut (Bracket)
.Stud (Bracket)
Bracket (Solenoid)
Link (Solenoid)
Link Pins (Solenoid)
Adjusting Bolt Adjusting Bolt Lock Nut Lever Lever Pin Solenoid Bolt (Foot Extension)
Bolt (Solenoid Mtg.)
Lock Washers Foot Extension Cotter Pins Cover (Solenoid)
Cover Screws Data Plate Identification Plate Drive Screw Inlet Stud Inlet Gasket Outlet Gasket Nameplate
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Test Report No. 392! Revision l Page 8
- 4.
Selected Test Valves 4.l !he Crosby Style HPV-SN Pressure Relief Valves selected for the EPR! testing at Yiarshall Station and ~yle Laboratories are tabulated below.
~!arshall Station, Terrell. North Carolina Selected. !est Valve:
Valve Origin:
Valve Drawing No.:
2-l/2 x 4 HPV-SN Crosby Assembly No. N56969-0002 Crosby Faceory Order ~300829 North Amla No. 4 DS-C-56969 Yyle Laboratories, Norco, Califo-rnia Selected Test. Valve:
Valve Origin:
Valve Drawing No.:
2-1/2 x 4 HPV-SN Crosby Assembly No. NS6969-000l Crosby Factory Order N300823 No~th Anna No. 3 DS-C-56969
ISSUED 12-23-71 RGW REV. A 6-22-71 REv. B il-9-71 REV C
.WAS 16*1/2
.WAS?.6112
- .WAS 17*112
. 9*9-71 2*112~-2500 LB.
ANSI STD. B-16 5 RAISED FACE
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OUTLET THRUST-4400 LBS.
NOTES:
---.:;;m_L OUTLET FLANGE (PC. NO. IOI AS SHOWN PRIOR TO INSTALLING ON VALVE.
JOlt NO._li'Llll!l t.L* :-l*tl **-. -* -**-*... ---
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CROSClf vr,1 VE u G:.;.:.r cu i-----Wfi~~J!*t.M, ~\\<;~>. -*** *--*-*---
SOU:NOID PLOJ Oi1cRAIW l<(UH
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SIZE 2*112 X 4 DRAWING NO M::V.
STYLE HPV-SN H*54890 c
WEIGHT
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VEPCO B6W MARK NO MARK NO J-RC-PS\\2
- S RC-PSV2 4*RC*PS\\/i 4 RC-PSV2
- s*r<<;*PSVZ l>> RC*PSV2 4*fl:*PSV2 4 _!'IC*PSVZ PC N044-IDENTlflCATIOJ\\I PLATE GE~ERAt INF9R~AT1Qr-!
BflW PO.NO VALVES IN ACCORDANCE WITll TH: fOLLOWING SPECIFICATIONS,COOES,ANO STAN[).\\ROS CllOS6Y FO ~Q 86WSPfC NO oo-To/~000001 I0* 109500000I oo* 1106000001 09* 1152000001 ASME SECT. m CODE 6 ADDENDA PER ABO\\/E TABUUITION ANSI 816 5-1968 ISSUE CLEANLINESS CLASS "8" PER 86W SPEC. I0-109"...000001.
QA. LEVEL I PfR saw SPEC. 09-1152000001.
'CROSBY 10 SUPPLY MFG. SP.EC. SHEET ON SOLENOID.
PC. NQ 49 - NAME: PLATE WEIGHT
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!est Report No. 3921 Revision l CROSBY
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VAl.V! a G.l.GE WRENTHAM, MASS
- 5.
Design Variations and Effects On Operability COM PA.~i' Page 1.2 5.l Listed below are the design variations between the selected test valves (North Anna 3 and 4) and the onl~ other Crosby RPV-SN Power Operated Relief Valve installed on Toledo Edison Davis Besse ~o. 1.
Main Body Design
}1ain Valve ~ozzle Bore Size Solenoid Voltage
~1ain Valve Guide Design Toledo Edison Davis ~ass&
Unit No. l Crosby Assembly No. 54890 Round eccentric body design with integral inlet flange and pilot assembly h\\lused within main valve body and solenoid bracket on top of valve.
l.546/l.541" dia.
bore 125 VDC Press rit and Staked Design Vepco North Anna 3 and 4 Crosby Assembly No. Y56969 Square shaped body with studded inlet connection. Pilot assembly has separate body hous-ing which is welded to the main valve body and solenoid bracket attached to side of valve body.
1.300/1.320" dia.
bore 120 VAC Threaded and Stake~
(Crimped)
Comments The square shaped body ~onstruction with separate pilot valve body (Crosby Assembly No. N56969) was developed for ease in manufacture.
Bore sizes, pel:'
customer's specifica eion requirements for required flow.
Voltage re~uiremenes per customer speci-fication requirement
- Both solenoids are GE Style CR 9503.
The threaded and I
crimped design I
(Crosby Assembly
~56969) was de:*relcpeq ftr ease in rnanufac-I e*u*ing and i:iprove I
valve guide retentio,.
The design differences for the* two (2) valve designs noted above ~ill result in no significant differences in valve operation on saturated steam service per 5.2 customer spec if ica ti on req*.iiremen ts.
CROSBY r
I d
Test Report ~o. 3921 Revision 1
- 6.
Conclusion CROS3'f VALVE a GAGE CO~PA~~y WRENTioiAM, MASS Page 13 6.1 Both the design installed at Toledo Edison and the selected test valve possess the same principle of operation and except for the design differences noted in Section 5 of this report, the pilot which is installed in the valve and the main valve internals are basically identical in material and geometry.
The selected test valves (North Anna 3 and 4, Crosby Assembly ~o. :{56969) are generally representative to the Crosby Style HPV-SN Powa~ Operated Relief Valve installed at Toledo Edison, Davis Besse Unit No. 1, as a pressurizer power operated relief valve *
'.. 1 B4 - DRESSER INDUSTRIES