ML18047A447

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Justification Rept of EPRI Testing of Crosby Style HB-BP-86 Pressurizer Safety Valves, Revision 1
ML18047A447
Person / Time
Site: Palisades Entergy icon.png
Issue date: 10/13/1981
From: Taylor D, Thibault D, Zahorsky J
CROSBY VALVE & GAGE CO.
To:
Shared Package
ML18047A442 List:
References
3920, 3920-R01, 3920-R1, NUDOCS 8207160341
Download: ML18047A447 (36)
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.CROSBY REPORT NO. 3920 REVISION 1 JUSTIFICATION REPORT OF EPRI TESTING OF CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVES APPROVED BY* ~yt!l('-c!./~C,_- () / I

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\\J:,..~IEF ENGINESK-SAFE':Y VALVES DATE: OCTOBER 13, 1981 1-a2of16o341 -e2o4o1_____ --' I PDR ADOCK 05000255 P . PDR COW?AN'f

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~ ".. _,.......J,l_,, ) f trSa&ilAW'__, C~039'f VAl..'Jt:: GAQE w.qEl'fT11AW, MASS .:est Report ~o. 3920*Revision l Pa~;e 2 1.. Scope l.l The purpose of this report is to provide within a single document the informa-tion listed below: l.l.l A summary of the Crosby models and the quantity of such models used in or intended for use in domestic PWR Nuclear Power Plants as pressurizer safety valves. l.l.2 A concise listing of all Crosby Safety Valves usen in or intended for use in PWR Plants for pressurizer safety valves. The listing includes the utilityp station, valve size, !il.Odel number, Crosby Order Number, quantity per plant>> reactor manufacturer, drawing number, body con-struction, flange :-acings~ seat material and internal material varia~ tions within valve orifice size. l.l.3 A brief description of valve performance including a description of the main internal parts. A drawing of the generic 7alve model is also included. l.l.4 A listing of the valves selected far the EPRI tests which includes the valves origin and data $heet drawings. l.l.5 A listing of all design vari.:itions bet'~een selected test valve$ and valves used in or intended for use in ?WR Plants as pressurizer safety valves. An e.~planation o.f effects on performance due to each specific design variatiOLl is included. l.l.6 An explanation of validity of selected test valves to represent all er a specific portion of all Crosby Valves used as pressurizer safety valves.

Test Report Xo. 3920.Revision 1

2.

Introduction C~OSSY VALVE a GAG~ W~ENTHAM, M..\\SS 2.1 Tabulated below is the quantity of each valve model provided as pressurizer safety valves. The complete valve listing of this repor: tabulates the specific design variations of each Crosby Asseobly ~umber denotes the model number. All valves the Crosby Style HB-BP-86 Safety Valve. K Orif.ice. K2 Orifice Ml Orifice M Orifice Quan. Quan. Quan. Quan. Ass em. of Ass em. of Assem. of Ass em. of No. Plants No. Plants No. Plants No. Plants 50646-1 1 47469-1 1 52137 3 51250-1 l and N51185-2 N54495 1 51249 6 N54891 1 51688

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N60582 2 h N61894 2 2.2 The following tabulation is a detailed breakout by orifice ~ize of all models of Crosby Style HB-BP-86 Safety Valves supplied for use on or intended use on PWR Nuclear Power Plants as pressurizer safety valves.

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CROSBY Test Report No. 3920 Revision 1

3.

Description of Valve 3.1 Valve Construction CROSBY VALVE a GAGE COMPANY WRENTHAM, MASS Page 17 3.1.1 Figure 1 is a generic illustration of the Crosby Style HB-BP-86 Safety valve. Use part numbers noted in following description to locate parts in Figure l. 3.1. 2 Inside the body (1) is housed the upper portion of the nozzle (2), nozzle ring (3), disc ring (7), adjusting ring (12), eductor (11), and the bellows assembly consisting of the bellows (8) to w~ich is welded the disc holder (5). The disc insert (9) is held in place in the disc holder (5) by insert pin (10). 3.1.3 The eductor (11), bellows assembly and the bonnet adapter (15) are retained between the valve body (1) and the bonnet (18) by bonnet studs (38) and bonnet stud nuts (39). 3.1.4 Housed in the bonnet (18) is the spring (19) 1 and spring uashers (20) carried by the spindle assembly (14), the lower end of ~hich is posi-tioned on the bushing (6) in the disc holder (5). 3.1. 5 Adjusting bolt (29) is locked in place by the *adjusting bolt nut (30) at the top of the bonnet (18), within the cap (21). 3.1.6 Manual lifting means is provided by lever (28), dog shaft (23), dog (22) and spindle nut (16) and spindle nut cotter (17). 3.1.i Cap plug (31) is screwed into the top of cap (21) or cap top (43) when

gagging screw is not in use.

3.2 Valve Operation 3.2.1 A typical valve operating cycle on steam is as follows: As pressure in the pressurizer vessel increases to the safety valve set point, the valve will open to a lifted position. After the valve o?e~s, steam passes through the annular openings between the nozzle rin; (3) and adjusting ring (12) and 3. series of annular :flow passages :.etween t~e disc ring (7) and :he adjusting ring (12) and the educto-r (11) and' :he adjusting ring (12). Tnis Elow of steam ~hrou;h these annular ?assages and the exhaust tbrough t::-ie o?enings in c:--,e ad_:;.::= ting r:.:,g (12), *:o::.- t-rols the ;:i-ressure i.:1. the chamber above the disc ::"ing (7) :ind_ be:w=:en the educt:or (11) and bello~s (S). As pressure in the p-r~ssurizer ?essal decays, the ~~~aci: ~occes ~n the la~er ~ace of :~e dis~ -ri~g

:-: -= : :.- :.

CROSBY Test Report No. 3920 Revision l c R 0 say v Al.VE a GA GE c 0.. PAN y WRENTHAM, MASS Page 18 J. Description of Valve (Continued) 3.2 Valve Operation (Continued)

3. 2. 2 The primary purpose of the nozzle ring (3) is to control the popping action of the valve.

This ring is factory set Eor a minimum warn and sharp popping action and is seldom field adjusted. The primary func-tion of the adjusting ring (12) is co control the valve blowdo~. Raising the adjusting ring (12) decreases the blowdown and c.onver3ely lo'=Jering this ring increases the blowdown. \\._

'rest Report No. 3920 Revision 1 ALTERNATE CONSTRUCTION WITHOUT CAP TOP FIG. lb STYLE HB (WITHOUT PISTON) FIG. le WELCED !Nl.ET CONSTRUCTION FIG. Id FIG. le STYLE HB-BP (WITH PISTON) FIG. la Page 19

Test Report No. 392C Revision l Page 20 Piece No. l 2 3

  • 6
  • 1
  • 8
  • 9
  • lO*

ll 12 13 14 l4A l4B l.5 16 17 18 19 20 u 22 23 24

  • 2S 26 27 28 29 30 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37 38 Crosby Valve & Gage Com~any Wrentham, Massachusetts Part ~fame Body Nozzle Nozzle Ring Nozzle Ring Set Screw Disc:: Holder Disc Bushing Oise Ring Bellows Oise Insert Disc Insert Pin Educ tor Adjusting Ring Ad.justing Ring Set Screw Spindle Assembly Spindle Point S pi.ncU.e Rod Bonnee Adapter Spindle Nut Spindle Nut Cotter Bonnet Spring Spring Washer Cap Dog Dog Shaft Dog Sha.ft Bearing Dog Shafe 110" Ring Dog Lever Nut Dog Lever Lockwasher Lever Adjusting Bolt Adju$ting Bolt Nut Cap Plug Cap Plug Gasket Bonnet Adapter Gasket Eductor Gaske.:

~J~zle Ring and Adjusting Ring See Screw Gasket Dog Shafe Bea.ring Gasket Ca~ Gasket Bonnet Stud

'i~*.:re 1

Test Report No. 3920 Revision 1 Piece No. 38A 39 39A 40 41 42 43

  • 44 45 46 47 48 49 Crosby Valve & Gage Company Wrentham, Massachusetts Part Name Cap Stud Bonnet Stud Nut Cap Stud Nut Piston Piston.Lockclip Gag Screw Gag Top Cap Top Gasket Canopy Ring Gasket (Special)

Nameplate and Identification Plate Caution Plate Drive Screws Page 21

  • Parts not~d with an asterisk (*) are manufacturer's recommended spare parts.

Kcte Pieces No. 5, 6, 7 and 8 are purchased as an assembly

  • CROSBY Test Report ~o. 3920 Revision 1
4.

Selected Test Valves CROSBY VALVE a GAGE COMPANY W-R E N T H A M, M A S S Page Z2 4.l Tabulated c3low are the Crosby Style HB-BP-86 Safety Valves selected for the EPRI testing at Combustion Engineering-KDL Labs. Also included in this ~ection are data sheet drawings for each of the selected test valves. Selected Test Valve Valve Origin Valve Drawing ~o. 3xIU:6 HB~BP-86 Crosby Test Valve SK.-3658~V' 6x.."fx6 HB-BP-86 Crosby Factory Ord~~ os~c-56964 Crosby Assembly No. No. N303167 N56964 Shearon Harris Unit ~o. 4 6xNx8 RB-BP-86 Crosby Factory Order DS-C-61894 Crosby Assembly No. Nos. N80518 or X80520 N61894 TVA Yellow' Creek l and 2

Test Report N o. 3920 Revision.1 A AFFRJC. OJERALL. HCit I '* B @~----:---* ll \\l \\I I ii !i I 'I !1 \\1i I

I

\\! i: 11 r ~ HB WITH BELLOWS Page 23 CROSBY VALVE & GAGE CO ~ Wrentham, Mass. Style Drawing I HB-BP-86 TYPE C I SK-3658-V I

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I. RECOllJMENOEO SPARE PIECE

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l'llES~URE RUAINING Pll!:C[ I 1 *' 1* *

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VAlllf ACCESSORIES Fl.lllNISllEO ONLY Ii.

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5.

Design Variations and Effects On Operability 5.1 Included in this section is a justificatj1;n report sheet for each valve orifice size of the Crosby Style HB-BP-86 Safety Valve. The purpose of these justi-fication sheets is to outline the reasoning involved in selecting a particular valve model to represent each valve size. ~ote from the previous section chat a valve for each orifice size was not selected for the EPRI tescing. Refer to Section 6 of this report for justification of chosen test valves across orifice sizes. 5.2 The left most column of each justification sheet groups into arrays all valve assemblies with identical significant design features. Each remaining ~olumn identifies and selects the specific design features chosen for testing. The reasoning for selection which includes effects of design parameters on valve operability is included in the notes at the lower end of each justification sheet. Each sheet is separated into non-loop seal and loop seal installations

  • Test Report No. 3920 Revision 1 Page 28 JUSTIFICIATON OF TEST VALVE DESIGN CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVE K ORIFICE CROSBY VALVE & GAGE COMPANY WRENTHAM, MASSACHUSETTS Complete Listing of Design Arrays Note 1 Assembly Nos. 50646 and N54495 Cast Body-Flanged Inlet Flange-3" 2500 Lbs.

Outlet Flange-6" 300 Lbs. Seating Material - 19-9DL SST Type 1 Disc Holder Quantity: 2 Plants Assembly No. N59336 Cast Body-Flanged Inlet Flange - 3" 2500 Lbs. Outlet Flange - 6" 300 Lbs. Seating Material - 19-9DL SST Type 3 Disc Holder --~:~:::_~-=-~=:~:---~ Crosby R&D Test Valve Cast Body-Flanged Inlet Flange - 3" 1500 Lbs. Outlet Flange - 611 600 Lbs. Seating Material - Stellite 6B Type 1 or 3 Disc Holder uantit : 0 Plants NOTES: Justification Note'for Selection of Inlet Flange Ratin Remaining Design Arrays Considered for Test Selec-tion Cast Body-Flanged Inlet Flange-3" 1500 Lbs. Outlet Flange-6" 600 Lbs. e 1 Disc Holder Cast Body-Flanged Inlet Flange - 3" 1500 Lbs. Outlet Flange - 6" 600 Lbs. Seating Material - Cast Body-Flanged Inlet Flange - 3" 1500 Lbs. Outlet Flange - 6" 600 Lbs. Seating Material - Stellite 6B Type 1 or 3 Disc Holder Justification Note for Selection of

  • Outlet Flange Ratin Remaining Design Arrays Con.sidered for Test Selec-tion NON-LOOP SEAL Cast Body-Flanged Inlet Flange-3" 1500 Lbs.

Outlet Flange-6" 600 Lbs. Seating Material 19-9DL T e 1 Disc Holder Cast Body-Flanged Inlet Flange - 3" 1500 Lbs. Outlet Flange - 6' 600 Lbs. Seating Mater.ial 19-9DL T e 3 Disc Holde LOOP SEAL Cast Body-Flanged Inlet Flange - 3" 1500 Lbs. \\.----1-1 Outlet Flange - 6" 600 Lbs, Seating Material - Stellite 6B Type 1 or 3 Disc Holder Justification Note for Selection of Disc Holder Construction Final Design Arrays Considered for Test Selec-tion >----+ Cast Body-Flanged Inlet Flange - 3" 1500 Lbs. Outlet Flange - 6 11 600 Lbs. Seating Material 19-9DL e 1 Disc Holde I Selected Test Valve Cast Body-Flanged Inlet Flange - 3" 1500 Lbs. Outlet Flange - 6 11 600 Lbs. Seating Material Stellite 6B T e 1 Disc Holder 1 - This listing groups into arrays all assemblies which are identical in all significant design parameters. The quantity of domestic plants having each array are included in the listing. See the attached Crosby listing of all Crosby Style HB Safety Valves installed in domestic PWR Nuclear Power Plants. 2 - The 1500 lb. inlet flange rating has been selected. Use of a 1500 lb. rating as compared to a 2500 lb. rating would be the most rigorous test on the valve design based on possible effects on valve performance during possible applications of external loads to the valve. 3 - The 600 lb. outlet flange rating has been selected for test. The rating of the outlet flange (600 lbs. versus 300 lbs.) will have negligible effect on valve performance. The 600 lb. outlet flange rating is the only rating presently available with the 1500 lb. inlet flange rating. 4 - The Type 1 disc holder construction has been selected for test since this construction is installed in two (2) of the three (3) domestic plants having K Orifice Valves. 5 - The selected test valve for non-loop seal applications is the Crosby R&D Test Valve purchased by EPRI. The valves flange ratings, seating mater-ial and disc holder construction are as listed in the final design array column for non-loop seal eesting. For loop seal testing the. same valve will be utilized with the nozzle, disc insert and disc holder assembly replaced with.the material and construction listed under the final design array column for loop seal testing. There are some dissimilarities in design between the selected test valve and the K Orifice Valves installed in the field. The design differences are as follows: 5.1 The test valve has an open bonnet and cap construction whereas the K Orifice Valves installed in the field have closed bonnet and cap assemblies. The differences in bonnet construction will have minimal effect on valve performance. 5.2 The contours of the valve body for the test valve are dissimilar to the K Orifice Valves installed in the field. The radii ma~ing up the shape of the test valve body are somewhat sharper. The difference in body shape will not effect valve performance except possibly during application of nozzle loads to the valve with the test valve body being the most stringent test. 5.3 The valve body is constructed of cast carbon steel versus cast stainless steel used in valves installed in the field. DISC HOLDER CONSTRUCTION TYPES: Type 1 - 347 Stainless Steel With Stellite Lands and Stellite Disc Bushing. Type 2 - SA637 Grade 718 Without Bushing. Type 3 - SA637 Grade 718 With Stellite Disc Bushing.

Test Report No. 3920 Revision 1 Complete Listing of Justification Note Design Arrays For Selection Of f--~N..::;o..::t..::;e_::;l _______ 1.,....;:;.Inl C't Flan. C' Size fl~N-~~u;G-fy- -i~~;-;-;-~47479:..T, I I 51185 and N51185-2 tast Body - Flanged Inlet Flange-3" 1500 I I Lbs. !Outlet Flange-6" 600 Lbs. JUSTIFICATION OF TEST VALVE DESIGN CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVE K2 ORIFICE Final Design Array Considered for Page 29 CROSBY VALVE & GAGE COMPANY WRENTHAM, MASSACHUSETTS TcA t Sd(~~c~t~i~o~1c'..1 _____ _:L--!::S~e:.:!:l~e~c~t~e~d-1T.:!:.e=:s~t!:...-V::.:a::..:l~v~e::!s::___ _____________________ --l NON-LOOP SEAL I 47469-1, Cast Body - Flanged Either Assembly No. Inlet Flange-3" 51185 or N51185-2 1500 Lbs. r Cus t Body - 1l:mgl'll Outlet Flange-6" -l Inlet Fl:mge-3" 1500 Lbs. -{ Note i_ ) l t-----------~--------~--t---~-~~-~~--~-~---,---------i-----------~:::-::::t-~-~-----~---------------------------~-~-~---~------~--~--- 1 I I I 600 Lbs. Outlet Flange-6" 600 Lbs. !Seating Material - Seating Material - I Seating Material 9DL 19-9DL ~ype 1 Disc Holder I 19-9DL Tvoe 1 Disc Holder Tvoe 1 Disc Holder

  • Quantity: 2 Plants Assembly No. 51249 Cast Body - Flanged Inlet Flange-4" 1500 Lbs.

Outlet Flange-6" 600 Lbs. Seating Material - Stellite 6B Type'l Disc Holder Quantity: 6 Plants Assembly No. 51689 Cast Body - Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material - Stellite 6B Type 1 Disc Holder uantit : 2 Plants NOTES: I I Cast Body - Flanged Inlet Flange-4" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material - Stellite 6B T e 1 Disc Holder Assembly No. 51249' Cast Body -*Flanged Inlet Flange-4" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material - Stellite 6B T e 1 Disc Holder 1 - This column groups into arrays all assemblies which are identical in all significant design parameters. The quantity of domestic plants having each design array are included in the ~isting. For further details see the attached Crosby listing of all Crosby Style HB Safety Valves installed in domestic PWR Nuclear Power Plants. 2 - The three (3) listed assembly numbers are all identical in design and materials and are the only K2 Orifice Valves installed on non-loop seal installations. Therefore, any one of the three (3) assemblies can be selected for test. 3 - The only dissimilar parameter between the two (2) designs is the valve inlet size. The valves have equal nozzle bore diameters and the ratio of nozzle bore to inlet size are maintained within a given value to assure chocked flow at the nozzle bore section. Therefore, the flow coefficient, and valve operation will not be effected by the different inlet sizes. The smaller in'let size (4") would be the most stringent test on the valve design. Also, the 4" valve design is found in greater amounts in the field. Therefore, the design the the 4" inlet has been selected for test. DISC HOLDER CONSTRUCTION TYPES: Type 1 - 347 Stainless Steel with Stellite Lands and Stellite Disc Bushing.

T~st Report No. 3920 Revision 1 Page 30 JUSTIFICATION OF !EST VALVE DESIGN CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVB Ml ORIFICE CROSBY VALVE & GAGE COMPANY WRENTHAM, MASSACHUSETTS Complete Listing of Justification Note for Selection of Body Con-Remaining Design Arrays Considered for Test Selec-Final Design Arrays Considered for Test Selec-Selected Design Arrays Note 1 Justification Note for Selection of Inlet Flange Ra tin Remaining Design Arrays Considered for Test Selec-tion struction tion Justification Note for Selection of Disc Holder Construction tion Test Valve Assembly No. N54891 Cast Body-Flanged Inlet Flange-4" 2500 Lbs. Outlet Flange-6" 600 Lbs. Seat Material - See Note 2 Type 1 Disc Holder uantit : 1 Plant Assembly No. N59303 Cast Body-Flanged Inlet Flange-4" 2500 Lbs. Outlet Flange-6" 600 Lbs. NON-LOOP SEAL Cast Body - Flanged >-~~--1 Inlet Flange-4" 2500 Lbs. Outlet Flange-6" 600 Lbs. I I I Seating Material I 19-9DL Type 2 Disc I I ~~** I I ~~,r::::: 1 I I I I I I I Inlet Flange-6" 1500 Lbs. I* Outlet Flange-6" 600 I:.bs. l Seating Material-Stellite Type 1 Disc Holder Plants Assembly No. N56264 Cast Body-Flanged Inlet Flange-4" 2500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite Type 2 Disc Holder Quantit : 3 Plants Assembly. Nos. N56963 and N56963-l Forged Body-Studded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite Type 2 Disc Holder Quantit : 3 Plants NOTES: Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6" I 600 Lbs. Seating Material Stellite 1 Disc Holder Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material - Stellite T e 2 Disc Holder Forged Body-Studde Inlet Flange-6" 1500 Lbs. Outlet Flange-6 11 600 Lbs. Seating Material - Stellite T e 2 Disc Holder Cast Body-Flanged Inlet Flange-6 11* 1500 Lt.s. Outlet Flange-6" 600 Lbs. e 1 Disc Holder Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material Stellite T e 2 Disc Holder I r -I I Assembly No. N57872 Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite Type 2 Disc Holder 1 - This colum groups into arrays all assemblies which are identical in all significant design parameters. The *q~~ntity of domestic plants having each design array are included in the listing, For further details see the attached Crosby listing of all Crosby Style HB Safety Valves installed in domestic PWR Nuclear Power Plants. 2 - Assembly Nos. N54591 and N59303 (spare valve) are installed only at Toledo Edison-Davis Besse I. The valves are presently installed on loop seals with Stellite seating material. Toledo Edison has considered removing the valve from the loop seal and replacing the seating material with 19-9DL Stainless Steel material. Therefore, these two (2) assemblies will be considered for non-loop seal testing with 19-9DL seating material. 3 - The Type 2 Disc Holder has been selected for Ml Orifice non-loop seal testing since the Type 1 Disc Holder was selected for non-loop seal testing for both the K and K2 Orifice. 4 - Either assembly may be used for test providing the nozzle and disc insert are of 19-9DL Stainless Steel material. 5 - The 1500 lb. inlet flange rating has been selected for test. Use of a 1500 lb. rating as compared to a 2500 lb. rating would be the most rigorous test on the valve design based on possible effects on valve performance during possible applications of external loads to the valve. 6 - The cast body construction has been selected for test based on the following reasoning: 6.1 The greater quantity of cast body Ml Orifice Valves installed in the field. 6.2 The cast body design would be the most rigorous test on the valve style based on possible effects on valve performance during application of nozzle loads to the valve. 7 - The Type 2 Disc Holder construction has been selected for test due to the greater quantity in the field. been selected for loop seal tests on the K and.K2 Orifice Valves respectively. Also, the Type 1 Disc Holder types have 8 - Assembly No. N57872 possesses all the selected design parameters and therefore is the selected test valve for Ml Orifice loop seal testing. DISC HOLDER CONSTRUCTION TYPES: 1 - 347 Stainless Steel with Stellite iands and Stellite Disc Bushing. SA637 Grade 718 without bushing. - SA637 Grade 718 with Stellite Disc Bushing.

l'est Report No. 3920 Revision 1 Complete Listing of Design Arrays Note 1 Assembly No. 51250-1 Cast Body-Flanged Inlet Flange-4" 1500 Lbs. Outlet Fiange-6" 600 Lbs. Seating Material-19-9DL Type 1 Disc Holder uantit : 1 Plant Assembly No. N55605 Cast Body-Flanged Inlet Flange-6 11 2500 Lbs. Outlet Flange-6" 600 Lbs. Justification Note for Selec-tion of Inlet Flange Rating and Size / JUSTIFICATION OF TEST VALVE DESIGN CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVE M ORIFICE Remaining Design Arrays Considered for Test Selec-tion Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-19-9DL Type 1 Disc Holder Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Justification Note for Selection of Body Con-Remaining Design Arrays Considered for Test Selec-struction tion NON-LOOP SEAL Forged Body-Studded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material 19-9DL Type 1 Disc Holder Forged Body-S tudded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Justification J'.lote for Selection of Disc Holder Construction Page 31 CROSBY VALVE & GAGE COMPANY WRENTHAM, MASSACHUSETTS !final Design Arrays Considered for Test Selec-tion Forged Body - Studded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-19-9DL Type 2 Disc Holder Selected Test Valve Seating Material-19-9DL Type 2 Disc Holder Seating Material-19-9DL Type 2 Disc Holder ., s~;~~~~ Material 1 1 Type 2 Disc

~~~;-!;:~~=~~~---- -----t--------------i--------------------i---

'--~t--~~=--=--=c==-~~~~-" --~~~~~~-~-=-~=~~~---1----------------~--------------------i-Assembly Nos. 51688 and 51688-1 Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6 11 600 Lbs. Seating Material-Stellite Type 1 Disc Holder uantit : 11 Plant Assembly Nos. N55366, N56925 and N56499 Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite Type 2 Disc Holder uantit : 5 Plants Assembly No. N56964 Forged Body-Studded Inlet Flange-6" 150Q Lbs. Outlet Flange-6" 60q_ Lbs. Seating Material-Stellite Type 2 Disc Holder uantit : 21 Plants Assembly No. N60446 Forged Body-Studde Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite Type 3 Disc Holder uantit : 5 Plants NOTES: Forge.d Body-S tudded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite Type 1 Disc Holder Forged Body-S tudded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite Type 2 Disc Holder Forged Body-Studded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material Stellite Type 3 Disc Holder I I .I Assembly No. N56964 Forged Body-S tudded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite Type 2 Disc Holder 1 - This column groups into arrays all assefublies which are identical in all significant design parameters. The quantity of domestic plants having each design array are included in the listing. For further details see the attached Crosby listing of all Crosby Style HB Safety Valves installed in domestic PWR Nuclear Power Plants. 2 - The 1500 lb. inlet flange rating has been selected for test. Use of a 1500 lb. rating as compared to a 2500 lb. rating would be the most rigorous test on the valve design based on possible effects on valve performance during possible application of external loads to the valve. The valves have equal nozzle bore diameters and the ratio of nozzle bore to inlet size are maintained within a given value to assure choked flow at the nozzle bore. Therefore, the flow coefficient and valve operation will not be effected by the different inlet flange sizes. The 611 size was selected for test based on the greater amount installed in the field. 3 - The cast body construction has been selected for K, K2, Ml and N Orifice testing. body construction has been selected for M Orifice testing. 4 - The Type 2 disc holder construction has been selected for test based on a larger use of the Type 2 design material combination the most stringent test selection. for test for other orifice sizes. Therefore, to assure testing of both body designs, the forged quantity installed in the field and also Crosby considers the In addition, the Type 1 disc holder designs have been selected 5 - The valve design per Crosby Assembly No. N56964 possesses all the selected design parameters and will be used for test. nozzle will be removed and replaced with parts of 19-9DL material for non-loop seal testing

  • The disc insert and DISC HOLDER CONSTRUCTION TYPES:

Type 1 - 347 Stainless Steel with Stellite Lands and Stellite Disc Bushing. Type 2 - SA637 Grade 718 without bushing. Type 3 - SA637 Grade 718 with Stel.lite Disc Bushing.

Test Report No. 3920 Revision 1 Complete Listing of Design Arrays Note 1 Assembly No. N60582 Cast Body-Flanged Inlet Flange-6" 2500 Lbs. Outlet Flange-8" 600 Lbs. Seating Material-19-9DL Guiding-Stellite on Stellite uantit : 2 Plants Assembly No. N61894 Justification Note for Selection of Body Con-struct ion JUSTIFICATION OF TEST VALVE DESIGN CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVE N ORIFICE Remaining Design Arrays Considered for Tesc Selec-tion Justification Note for Selec-tion of Inlet Flange Rating Remaining Design Arrays Considered for Test Selec-and Size tion NON-LOOP SEAL Justification Note for Selection of Seating Materials Cast Body-Flanged !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!~ Inlet Flange-6" 2500 Lbs. Outlet Flange-8" 600 Lbs. Seating Design-Flexi-Disc Disc Insert-SA637 Grade 718 Nozzle-SA182 Grad 316 I Page 32* CROSBY VALVE & "GAGE COMPANY WRENTHAM, MASSACHUSETTS Final Design Arrays Considered for Test Selec-tion Assembly No. N61894 Cast Body-Flange Inlet Flange-6" 2500 Lbs. Outlet Flange-8" 600 Lbs. Seating Design-Flexi-Disc Disc Insert-SA637 Grade 718 Nozzle-SA182 Grade 316 Guiding-Stellite on Stellite Selected Test Valve Guiding-Stellite on Stellite I uantit : 2 Plants 1 I I I I l l t t I

~-----------1 I

I LOOPI SEAL I I Assembly No. N60491 Forged Body-Studded Inlet Flange-6" 1500 Lbs. Outlet Flange-8" 600 Lbs. Seating Material-Stellite Guiding-Stellite on Stellite uantit : 2 Plants NOTES: I Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Outlet Flange-8" 600 Lbs. Seating Material-Stellite Guiding-Stellite on Stellite I I Cast Body-Flanged Cast Body-Flange Inlet Flange-6" Tnlet Flange-6" 2500 Lbs. 2500 Lbs. Outlet Flange-8" Outlet Flange-8" ' 600 Lbs. 600 Lbs. Seating Material-Seating Material Stellite Stellite Guiding-Stellite Guiding-Stellite on Stellite on Stellite 1 - This column groups into arrays all assemblies which are identical in all significant design parameters. The quantity of domestic plants having each design array are included in the listing. For further details see the attached Crosby listing of all Crosby Style RB Safety Valves installed in domestic PWR Nuclear Power Plants. 2 - The two (2) designs for non-loop seal installations are identical except for seating designs. The 19-9DL material has been selected for tests for all other orifice sizes. Therefore, the Flexi-disc design has been selected for the N Orifice testing. 3 - Assembly No. N61894 possesses all the selected design parameters and will be used as the test valve. 4 - The cast body design would be the most rigorous test on the valve style based on possible effects on valve performance during application of nozzle loads to the valve. 5 - Crosby has never manufactured a cast body N Orifice RB Pressurizer Safety Valve with a 1500 lb. inlet flange rating. Therefore, the 2500 lb; inlet flange rating has been selected. 6 - Assembly No. N61894 shall be used as *the test valve with the nozzle and disc insert removed and replaced with parts having Stellite seats. DISC HOLDER CONSTRUCTION TYPES: Type 1 - 347 Stainless Steel with Stellite L~ds and Stellite Disc Bushing. Type 2 - SA637 Grade 718 without _.bushing. Type 3 - SA637*Grade 718 with Stellite Disc Bushing,

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.:r.=i.. :J r.::- ;:*=,_./ ....__.__:~ u CRCSS'l' V;tLVC: a GAGE co~~F=ANV .r !' t FWA1KdtN1ZU... aiS:.:2¥4wd WREl'4"!"MAM, MASS Report ~o. 3920 Revision 1 Page 33

6.

Conclusion 6.1 Summary of Design Differences Listed below is a summary of the design differences delineated in the justi-fication sheets of Section S of this report. 6.1.1 Valve Size Listed below are all the sizes of Crosby Pressurizer Safety Valves presently installed or to be installed in domestic PWR Plants. Letter Designation K K2 Ml M N Nozzle Bore Diameter (Inch) 1.531 1.800 1.952 2.154 2.362 6.1. 2 Seat }faterial Tne following list of seal material combinations are used in Crosby Pressurizer Safety Valves installed in or to be installed in domestic PWR Plants. 6.1.2.1 Valves Installed On Loop Seals Stellite 6B disc insert against hard faced Stellite 6 nozzle. 6.1. 2. 2 Valves Installed Without Loop Seal 6.1.2.2.1 uisc insert and nozzle constructed of 19-9DL Stain-less Steel, ASTM A458 Grade 651 or AST.*1 A477 Grade 651. 6.1.2.2.2 Flexi-disc design (N Orifice only) - disc insert of ASHE SA63i Grade 718 against nozzle of ASHE SA182 Grade F316. 6.1.3 Disc Holder Construction Tile following disc holder constructions are used in the Crosby Pres-surizer Safety Valves installed in or to be installed in domestic FWR Plants.

Test Report ~o. 3920 Revision l Page 34

6.

Conclusion (Continued) 6.1 Summar.* of Design Differences (Continued) 6.1.3 Disc Holder Construction (Continued) Type l (~sed in K, K2, Ml and M Orifice Valves) ~ 347 Stainless Steel disc holder with Stellite lands and disc bushing. !ype 2 (Used 'in Ml and M Orifice) - ASME SA617 Grade 718 disc holder without disc bushing. Type 3 (Used in K and M Orifice Valved) = ASME SA637 Grade 718 disc bushing with Stallite disc bushing. 6.1.3.l All N Orifice Valves have an identical disc holder construc-tion which is a different design from those listed above. Guiding surfaces are constructed of Stellite. See Drawing No. DS~C-61894 on Page 25 for detail of construction. 6.l.4 Valve Bod~ Construction The following body constructions are used in the Crosby Pressurizer Safeey Valves installed in or to be installad in domestic: PWR Plants. 6.1.4.l Cast Body Construction All valve sizes integral cast inlet and outlet flanges. s~e justification sheets in Section 3 of this report for detail breakout of flange ratings. 6.1.4.2 Forged Bodv Construction (Ml, M, and N Orifice) Studded inlet and outlet flange coT1nectivns. See justifica-tion sheet'~ in Section 5 of this ro:port for detail breakout of flange ratings. 6.2 ~elected Desisn Paramet~ 6.2.1 !he following three (3) valve sizes have been selected for test. K Orifice - Represents smallest valve size. ~ Orifice - Represents the inter!!iediate size ~ith the greatest popula ti on. N Orifice - 0Repr*esents largest valve size.

~-~~~~ C :; Ll SB Y CROSBY VALVE a GAGE co;_;PANY .,-=-r+et' IWNN' f 'lllRENTliAM,.,.ASS 'Test Report ~o. 39ZO Revision 1 Page 35

6.

Conclusion (Continued) 6.2 Selected Design Parameters {Continuec) 6.2.2 Selected Disc Holder Constructions The Type 1 disc holder construction was selected for the K Orifice testing. The Type 2 disc holder construction was selected for the M Orifice testing. Therefore, both materials will undergo testing. The Type 3 disc holder construction will not undergo testing since it is identical to the Type 2 except for the addition of a disc bushing. Crosby recommends tests with the Type 2 rather than the Type 3 since the Type 1 construction which has a disc bushing has been selected for test in the K Orifice Valve. The N Orifice Valve disc holder construc-tion is unique to the other valve disc holder constructions and will undergo tests with the N Orifice Valve. 6.2.3 Seating ~faterials All seating material combinations will undergo testing as delineated in the just;.fication sheets of Section 5 to this report. A brief summary is listed belov. K Orifice _ Loop Seal - Stellite Seats Non-loop Seal 9DL Stainless Steel Seats M Orifice _ Loop Seal - Stellite Seats Non-loop Seal 9DL Seats N 0 if" Loop Seal - Stellite Seats r ice - Non-loop Seal - Flexi-disc construction 6.2o4 The Kand N*Orifice Valves will be tested with the cast body construc-tion. The M Orifice Valve will be tested with the forged body con-struction. Therefore, both body designs will undergo testing. 6.3 The selected test valves represent the Crosby Valves installed on or to be installed in P~*:R Plants and the EPRI test results are f11lly applicable to the Crosby Valves installed or to be installed in PWR Plants.

A2 - DRESSER INDUSTRIES

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