Text

Justification Rept of EPRI Testing of Crosby Style HB-BP-86 Pressurizer Safety Valves, Revision 1
	ML18047A447
Person / Time
Site:	Palisades
Issue date:	10/13/1981
From:	Taylor D, Thibault D, Zahorsky J; CROSBY VALVE & GAGE CO.
To:	;
Shared Package
ML18047A442	List: ML18047A440; ML18047A443; ML18047A445; ML18047A446; ML18047A447; ML18047A448; ML18047A449; ML18047A450; ML18047A451; ML18047A452; ML18047A453; ML18047A454; ML18047A455; ML18047A456; ML18047A457; ML18047A458; ML18047A459; ML18047A460; ML18047A461; ML18047A462;
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 I

I APPROVED BY* ~yt!l('-c!./~C,_-

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J .. R. ZAHORST9i'/

                                                 \J:,..~IEF ENGINESK-SAFE':Y VALVES

() DATE: OCTOBER 13, 1981 1-a2of16o341 -e2o4o1_____ --' I PDR ADOCK 05000255 P . PDR

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w.qEl'fT11AW, MASS trSa&ilAW'__, f .: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.

C~OSSY VALVE a GAG~ COY?ANY W~ENTHAM, M..\SS Test Report Xo. 3920.Revision 1 Page 3. i

2. Introduction lI 2.1 Tabulated below is the quantity of each valve model provided as pressurizer safety valves. The complete valve listing of by Crosby for use Paragraph 2.2 of II this repor: tabulates the specific design variations of each model. The I Crosby Asseobly ~umber denotes the model number. All valves listed *below are !

the Crosby Style HB-BP-86 Safety Valve. K Orif.ice . K2 Orifice Ml Orifice M Orifice N Orifice Quan. Quan. Quan. Quan. Quan. Ass em. of Ass em. of Assem. of Ass em. of Ass em. of No. Plants No. Plants No. Plants No. Plants No. Plants

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~~CROSBY VALVE a GAGE COMPANY CROSBY WRENTHAM, MASS~~
~~Test Report No. 3920 Revision 1 Page 17~~
3. Description of Valve 3.1 Valve Construction 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). 1 3.1.4 Housed in the bonnet (18) is the spring (19) 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~~
~~:-: -= : : .- :.~~
c R 0 say v Al.VE a GA GE c0 .. PAN y CROSBY WRENTHAM, MASS Test Report No. 3920 Revision l 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 Page 19 FIG. le ALTERNATE CONSTRUCTION WITHOUT CAP TOP FIG. lb STYLE HB (WITHOUT PISTON)~~
FIG. le STYLE HB-BP (WITH PISTON) FIG. la WELCED !Nl.ET CONSTRUCTION FIG. Id
Test Report No. 392C Revision l Page 20 Crosby Valve & Gage Com~any Wrentham, Massachusetts Piece No. Part ~fame
~~l Body 2 Nozzle 3 Nozzle Ring Nozzle Ring Set Screw Disc:: Holder~~
*6 Disc Bushing *1 Oise Ring *8 Bellows *9 Oise Insert *lO* Disc Insert Pin ll Educ tor 12 Adjusting Ring 13 Ad.justing Ring Set Screw 14 Spindle Assembly l4A Spindle Point l4B S pi.ncU.e Rod l.5 Bonnee Adapter 16 Spindle Nut 17 Spindle Nut Cotter 18 Bonnet 19 Spring 20 Spring Washer u Cap 22 Dog 23 Dog Shaft 24 Dog Sha.ft Bearing *2S Dog Shafe 11 0" Ring 26 Dog Lever Nut 27 Dog Lever Lockwasher 28 Lever 29 Adjusting Bolt 30 Adju$ting Bolt Nut 31 Cap Plug *32 Cap Plug Gasket *33 Bonnet Adapter Gasket *34 Eductor Gaske.: *35 ~J~zle Ring and Adjusting Ring See Screw Gasket *36 Dog Shafe Bea.ring Gasket *37 Ca~ Gasket 38 Bonnet Stud
~~'i~*.:re 1~~
~~Test Report No. 3920 Revision 1 Page 21 Crosby Valve & Gage Company Wrentham, Massachusetts~~
~~Piece No.~~
~~38A 39 39A 40 Part Name Cap Stud Bonnet Stud Nut Cap Stud Nut Piston 41 Piston.Lockclip 42 Gag Screw 43 Gag Top~~
*44 Cap Top Gasket 45 Canopy Ring 46 Gasket (Special) 47 Nameplate and Identification Plate 48 Caution Plate 49 Drive Screws *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
a CROSBY VALVE GAGE COMPANY CROSBY W- R E N T H A M , M ASS Test Report ~o. 3920 Revision 1 Page Z2
4. Selected Test Valves 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 No. 3920 Revision.1 Page 23
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~~~T-e_s__t--Re_p_o_r__t--No--.--39_2_0__R--ev--is--io-n---l-----------------------------------------------P-a_g_e__2_7__......i~~
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 CROSBY VALVE & GAGE COMPANY K ORIFICE WRENTHAM, MASSACHUSETTS Justification Justification Justification Complete Listing Note'for Remaining Design Note for Remaining Design Note for Final Design of Selection of Arrays Considered Selection of Arrays Con.sidered Selection of Arrays Considered Design Arrays Inlet Flange for Test Selec- *Outlet Flange for Test Selec- Disc Holder for Test Selec- Selected Note 1 Ratin tion Ratin tion Construction tion Test Valve NON-LOOP SEAL Assembly Nos. 50646 Cast Body-Flanged Cast Body-Flanged and N54495 Inlet Flange-3" Inlet Flange-3" Cast Body-Flanged 1500 Lbs. 1500 Lbs.
Inlet Flange-3" Outlet Flange-6" Outlet Flange-6" 2500 Lbs. 600 Lbs. 600 Lbs. Outlet Flange-6" Seating Material 300 Lbs. 19-9DL Seating Material - e 1 Disc Holder T e 1 Disc Holder 19-9DL SST Type 1 Disc Holder Quantity: 2 Plants >----+ Cast Body-Flanged Inlet Flange - 3" 1500 Lbs. Outlet Flange - 611 Assembly No. N59336 600 Lbs. Cast Body-Flanged Cast Body-Flanged Cast Body-Flanged Inlet Flange - 3" Seating Material Inlet Flange - 3" Inlet Flange - 3" 19-9DL 2500 Lbs. 1500 Lbs. 1500 Lbs. e 1 Disc Holde Outlet Flange - 6" Outlet Flange - 6" Outlet Flange - 6' 300 Lbs. 600 Lbs. 600 Lbs. Seating Material - Seating Material - Seating Mater.ial 19-9DL SST 19-9DL Type 3 Disc Holder
~~--~:~:::_~-=-~=:~:---~~~
T e 3 Disc Holde I Crosby R&D Test LOOP SEAL Valve Cast Body-Flanged Cast Body-Flanged Cast Body-Flanged Cast Body-Flanged Inlet Flange - 3" Inlet Flange - 3" Inlet Flange - 3" Inlet Flange - 3" 1500 Lbs. 1500 Lbs. 1500 Lbs. 1500 Lbs. Outlet Flange - 611 Outlet Flange - 6" \.----1-1 Outlet Flange - 6" Outlet Flange - 611 600 Lbs. 600 Lbs, 600 Lbs. 600 Lbs. Seating Material - Seating Material - Seating Material - Seating Material Stellite 6B Stellite 6B Stellite 6B Stellite 6B Type 1 or 3 Disc Type 1 or 3 Disc Type 1 or 3 Disc T e 1 Disc Holder Holder Holder Holder uantit : 0 Plants NOTES: 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 Page 29 JUSTIFICATION OF TEST VALVE DESIGN
Complete Listing Design Arrays of Justification Note For Selection Of f--~N..::;o..::t..::;e_::;l_ _ _ _ _ _ _1.,....;:;.Inl C't Flan . C' Size CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVE Final Design Array Considered for K2 ORIFICE 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 fl~N-~~u;G-fy- -i~~;-;-;-~47479:..T, 51185 and N51185-2 tast Body - Flanged I I Cast Body - Flanged I Either Assembly No. 47469-1, Inlet Flange-3" 1500 Inlet Flange-3" 51185 or N51185-2 Lbs.
~~!Outlet Flange-6" 600 I I 1500 Lbs.~~
~~Outlet Flange-6" r~~
~~-l Cus t Body - 1l:mgl'll Inlet Fl:mge-3" 1500 Lbs. -{ Note i_ )~~
~~Lbs. l~~
~~!Seating Material -~~
~~I I 600 Lbs. Seating Material - Outlet Flange-6" 600 Lbs. Seating Material 9DL 19-9DL~~
~ype 1 Disc Holder 19-9DL I Tvoe 1 Disc Holder t-----------~--------~--t---~-~~-~~--~-~---,---------i-----------~:::-::::t-~-~-----~---------------------------~-~-~---~------~--~---
I
*Quantity: 2 Plants Tvoe 1 Disc Holder Assembly No. 51249 1 I Cast Body - Flanged I I Inlet Flange-4" 1500 Lbs.
Outlet Flange-6" 600 Lbs. Seating Material - Cast Body - Flanged Assembly No. 51249' Stellite 6B Inlet Flange-4" Cast Body -*Flanged Type'l Disc Holder 1500 Lbs. Inlet Flange-4" 1500 Lbs. Quantity: 6 Plants Outlet Flange-6" Outlet Flange-6" 600 Lbs. 600 Lbs. Seating Material - Stellite 6B Assembly No. 51689 Seating Material - T e 1 Disc Holder Cast Body - Flanged Stellite 6B Inlet Flange-6" T e 1 Disc Holder 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material - Stellite 6B Type 1 Disc Holder uantit : 2 Plants NOTES: 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 CROSBY VALVE & GAGE COMPANY Ml ORIFICE WRENTHAM, MASSACHUSETTS Justification Justification Justification Complete Listing Note for Remaining Design Note for Remaining Design Note for Final Design of Selection of Arrays Considered Selection of Arrays Considered Selection of Arrays Considered Design Arrays Inlet Flange for Test Selec- Body Con- for Test Selec- Disc Holder for Test Selec- Selected Note 1 Ra tin tion struction tion Construction tion Test Valve NON-LOOP SEAL Assembly No. N54891 Cast Body-Flanged Inlet Flange-4" 2500 Lbs. Outlet Flange-6" 600 Lbs. Seat Material - See Note 2 I Type 1 Disc Cast Body - Holder uantit : 1 Plant >-~~--1 Flanged Inlet Flange-I 4" 2500 Lbs. Assembly No. N59303 Outlet Flange-6" 600 Lbs. I Cast Body-Flanged Inlet Flange-4" Seating Material I 19-9DL 2500 Lbs. Type 2 Disc Outlet Flange-6" 600 Lbs. I I ~~** I
~~~~,r:::::~~
1 I - I I I I I I I Inlet Flange-6" 1500 Lbs. I* Outlet Flange-6" 600 I:.bs. Seating Material-l Stellite Type 1 Disc Holder Plants Cast Body-Flanged Inlet Flange-6" 1500 Lbs. Cast Body-Flanged Outlet Flange-6" Inlet Flange-6 11
~~I 600 Lbs. 1500 Lt.s.~~
Seating Material Outlet Flange-6" Stellite 600 Lbs. 1 Disc Holder Assembly No. Cast Body-Flanged e 1 Disc Holder N57872 Inlet Flange-6" Cast Body-Flanged 1500 Lbs. Cast Body-Flanged Inlet Flange-6" Outlet Flange-6" Inlet Flange-6" 1500 Lbs. 600 Lbs. 1500 Lbs. Outlet Flange-6" Assembly No. Seating Material - Outlet Flange-6" 600 Lbs. N56264 Stellite 600 Lbs. Seating Material-Cast Body-Flanged T e 2 Disc Holder Seating Material Stellite Inlet Flange-4" Stellite Type 2 Disc 2500 Lbs. Forged Body-Studde T e 2 Disc Holder Holder Outlet Flange-6" Inlet Flange-6" 600 Lbs. 1500 Lbs. Seating Material- Outlet Flange-6 11 Stellite 600 Lbs. Type 2 Disc Holder Seating Material - Stellite I Quantit : 3 Plants T e 2 Disc Holder Assembly. Nos. N56963 and N56963-l Forged Body-Studded Inlet Flange-6" 1500 Lbs. Outlet Flange-6" r 600 Lbs. Seating Material-Stellite
~~-I Type 2 Disc Holder Quantit : 3 Plants NOTES:~~
I 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. Also, the Type 1 Disc Holder types have been selected for loop seal tests on the K and.K2 Orifice Valves respectively. 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 Page 31 JUSTIFICATION OF TEST VALVE DESIGN CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVE CROSBY VALVE & GAGE COMPANY M ORIFICE WRENTHAM, MASSACHUSETTS Justification Justification Justification Complete Listing Note for Selec- Remaining Design Note for Remaining Design J'.lote for !final Design of tion of Inlet Arrays Considered Selection of Arrays Considered Selection of Arrays Considered Design Arrays Flange Rating for Test Selec- Body Con- for Test Selec- Disc Holder for Test Selec- Selected Note 1 and Size tion struction tion Construction tion Test Valve NON-LOOP SEAL Assembly No. 51250-1 Cast Body-Flanged Cast Body-Flanged Forged Body-Inlet Flange-4" Inlet Flange-6" Studded 1500 Lbs. 1500 Lbs. Inlet Flange-6" Outlet Fiange-6" Outlet Flange-6" 1500 Lbs. 600 Lbs. 600 Lbs. Outlet Flange-6" Seating Material- Seating Material- 600 Lbs. 19-9DL 19-9DL Seating Material Type 1 Disc Type 1 Disc 19-9DL Holder Holder Type 1 Disc uantit : 1 Plant Holder Forged Body - Studded Assembly No. Inlet Flange-6" N55605 1500 Lbs. Cast Body-Flanged Cast Body-Flanged Forged Body- Outlet Flange-6" Inlet Flange-6 11 Inlet Flange-6" Studded 600 Lbs. 2500 Lbs. 1500 Lbs. Inlet Flange-6" Seating Material-Outlet Flange-6" Outlet Flange-6" 1500 Lbs. 19-9DL 600 Lbs. 600 Lbs. Outlet Flange-6" Type 2 Disc Seating Material- Seating Material- 600 Lbs. Holder 19-9DL Type 2 Disc 19-9DL Type 2 Disc
., s~;~~~~ Material Holder Holder Type 2 Disc 1 1 --~~~~~~-~-=-~=~~~---1----------------~--------------------i- ------~~~;-!;:~~=~~~---- -----t--------------i--------------------i--- '--~t--~~=--=--=c==-~~~~-"
Assembly Nos. 51688 and 51688-1 Cast Body-Flanged Forge.d Body-I I Inlet Flange-6" Studded 1500 Lbs. Inlet Flange-6" Outlet Flange-6 11 1500 Lbs. 600 Lbs. Outlet Flange-6" Seating Material- 600 Lbs. Stellite Seating Material-Type 1 Disc Holder Stellite uantit : 11 Plant Type 1 Disc Holder Assembly Nos. N55366, N56925 and N56499 Forged Body-Cast Body-Flanged Studded Inlet Flange-6" Inlet Flange-6" 1500 Lbs. 1500 Lbs. Outlet Flange-6" Outlet Flange-6" 600 Lbs. 600 Lbs. Seating Material- Seating Material-Stellite Stellite Assembly No. Type 2 Disc Holder Type 2 Disc N56964 uantit : 5 Plants Holder Forged Body-Studded Assembly No. N56964 Inlet Flange-6" Forged Body-Studded Forged Body- 1500 Lbs. Inlet Flange-6" Studded Outlet Flange-6" 150Q Lbs. Inlet Flange-6" 600 Lbs. Outlet Flange-6" 1500 Lbs. Seating Material-60q_ Lbs. Outlet Flange-6" Stellite Seating Material- 600 Lbs. Type 2 Disc Stellite Seating Material Holder Type 2 Disc Holder Stellite uantit : 21 Plants Type 3 Disc Holder Assembly No. N60446 Forged Body-Studde Inlet Flange-6" 1500 Lbs. Outlet Flange-6" 600 Lbs. Seating Material-Stellite
~~.I Type 3 Disc Holder uantit : 5 Plants NOTES:~~
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. Therefore, to assure testing of both body designs, the forged 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 quantity installed in the field and also Crosby considers the use of the Type 2 design material combination the most stringent test selection. In addition, the Type 1 disc holder designs have been selected for test for other orifice sizes. 5 - The valve design per Crosby Assembly No. N56964 possesses all the selected design parameters and will be used for test. The disc insert and nozzle will be removed and replaced with parts of 19-9DL material for non-loop seal testing * ..* 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 Page 32* JUSTIFICATION OF TEST VALVE DESIGN CROSBY STYLE HB-BP-86 PRESSURIZER SAFETY VALVE CROSBY VALVE & "GAGE COMPANY N ORIFICE WRENTHAM, MASSACHUSETTS Justification Justification Justification Complete Listing Note for Remaining Design Note for Selec- Remaining Design Note for Final Design of Selection of Arrays Considered tion of Inlet Arrays Considered Selection of Arrays Considered Design Arrays Body Con- for Tesc Selec- Flange Rating for Test Selec- Seating for Test Selec- Selected Note 1 struct ion tion and Size tion Materials tion Test Valve NON-LOOP SEAL Assembly No. N60582 Cast Body-Flanged Inlet Flange-6" 2500 Lbs. Outlet Flange-8" 600 Lbs. Seating Material-19-9DL Assembly No. Guiding-Stellite N61894 on Stellite Cast Body-Flange uantit : 2 Plants Inlet Flange-6" 2500 Lbs. Assembly No. Outlet Flange-8" N61894 600 Lbs. Cast Inlet Body-Flanged Flange-6" !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!~ Seating Design-Flexi-Disc 2500 Lbs. Disc Insert-Outlet Flange-8" SA637 Grade 718 600 Lbs. Nozzle-SA182 Seating Design- Grade 316 Flexi-Disc Guiding-Stellite Disc Insert-SA637 on Stellite ' Grade 718 Nozzle-SA182 Grad 316 I Guiding-Stellite on Stellite I I I I ! uantit : 2 Plants 1 I lI l t I
------------------------- ----------------------- --------- ----------------- -------------,---------------------t------------------ ------~-----------1 ! ! I LOOPI SEAL I I Assembly No.
N60491 I I I Forged Body- Cast Body-Flanged Cast Body-Flanged Cast Body-Flange Studded Inlet Flange-6" Inlet Flange-6" Tnlet Flange-6" Inlet Flange-6" 1500 Lbs. 2500 Lbs. 2500 Lbs. 1500 Lbs. Outlet Flange-8" Outlet Flange-8" Outlet Flange-8" ' Outlet Flange-8" 600 Lbs. 600 Lbs. 600 Lbs. 600 Lbs. Seating Material- Seating Material- Seating Material Seating Material- Stellite Stellite Stellite Stellite Guiding-Stellite Guiding-Stellite Guiding-Stellite Guiding-Stellite on Stellite on Stellite on Stellite on Stellite uantit : 2 Plants NOTES: 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,
~~i**t¢,Q?N.'5i£2EQ:i'n;;.7.:.Ac~~~
~~.:r .=i . :J r.::- ;:*= ,_./~~
~~CRCSS'l' V;tLVC: a GAGE co~~F=ANV~~
~~............... ....__.__:~ u .r !' t FWA 1KdtN1ZU...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 Nozzle Bore Diameter Designation (Inch) K 1.531 K2 1.800 Ml 1.952 M 2.154 N 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.~~
~~0 N Orifice - Repr*esents largest valve size.~~
~~~-~~~~~~
~~CROSBY VALVE a GAGE co;_;PANY C :; Ll SB Y 'lllRENTliAM, .,.ASS~~
~~.,-=-r+et' IWNN' f~~
~~'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 if" Loop Seal - Stellite Seats 0r 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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ML18047A447

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