ML17277B220: Difference between revisions
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| issue date = 12/11/1983 | | issue date = 12/11/1983 | ||
| title = Qualification of Purge & Vent Valves at WPPSS-2, Vols 1 & 2 | | title = Qualification of Purge & Vent Valves at WPPSS-2, Vols 1 & 2 | ||
| author name = | | author name = Armstrong D, Meyer M, Scott M | ||
| author affiliation = CYGNA ENERGY SERVICES | | author affiliation = CYGNA ENERGY SERVICES | ||
| addressee name = | | addressee name = | ||
Revision as of 00:23, 19 June 2019
| ML17277B220 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 12/11/1983 |
| From: | Armstrong D, Matthew Meyer, Michael Scott CYGNA ENERGY SERVICES |
| To: | |
| Shared Package | |
| ML17277B221 | List: |
| References | |
| NUDOCS 8312300157 | |
| Download: ML17277B220 (167) | |
Text
REGULA TO 1%&ORNATION DISTRIBUTION
>i (RIDE)ACCESSION NBR:8312300157 DOC~DATE: 83/12/11 NOTARIZED:
NO DOCKET FACIL'0 397 WPPSS Nuclear Projects Unit 2E Washington Public Powe 05000397 AUTH.NAME'AUTHOR AFFII IATION MEYEREM~Cygna Energy Services SCOTTpM, Cygna Energy Services ARMSTRONGiD, Cygna Energy Services RECIP~NAME RECIPIENT AFFILIATION
SUBJECT:
"Qualification of Purge L Vent Valves at WPPSS<<2E" Vols 1 L 2." DISTRIBUTION CODE: S001S COPIES RECEIVED:LTR IC ENCL g~SIZE:(~g2 g~g TITLE: Licensing Submittal:
PSAR/FSAR Amdts L Related Correspondence
'OTES: L ePVle gEPg RECIPIENT ID CODE/NAME NRR/DL/ADL NRR LB2 LA COPIES RECIPIENT LTTR ENCL ID CODE/NAME 1 0 NRR LB2 BC 1 0 AULUCKER, 01 COPIES LTTR ENCL 1 0 1 1'NTERNAL:
ELD/HDS2 IE/DEPER/EPB 36 IE/DEQA/QAB 2$NRR/DE/CEB ii NRR/DE/EQB 13 NRR/DE/MEB 18 NRR/DE/SAB 24 NRR/DHFS/HFEB40 NRR/DHFS/PSRB NRR/DS I/AEB 26 NRR/DS I/CPB 10 NRR/DSI/I CSB 16 NRR/DSI/PSB 19 NRR/DSI/RSB 2K RGN5 EXTERNAL: ACRS 41 DMB/DSS (AMDTS)LPDR 03 NSIC 05 1 3 1 1 2 1 1 1 1 1 1'1 1 3 IE FILE IE/DEPER/IRB 35 NRR/DE/AEAB NRR/DE/EHEB NRR/DE/GB 28 NRR/DE/MTEB 17 NRR/DE/SGEB 25 NRR/DHFS/LQB 32 NRR/DL/SSPB NRR/DS I/ASB NRR/DSI/CSB 09 NRR/DS I/METB 12 N/RAB 22 REG F IL 04/MIB BNL(AMDTS ONLY)FEMA-REP DIV 39 NRC PDR 02 NTIS 1 1 1 1 2 1'1 1 1 1 1 1 1 1 1 1 1 i-]a 0 1 c 0 TOTAL NUMBER OF COPIES REQUIRED: LTTR 53 ENCL 46 4t,>t%5 I>>II il li II l I VOLUME I-ATTACHMENT A'1 QJALIFICATION OF PURGE AND VENT VALVES PREPARED FOR: WASHINGTON PUBLIC POWER SUPPLY SYSTEM WNP-2 SITE VALVE SIZES: 24" AND 30" VALVE MANUFACTURER:
BIF A UNIT OF GENERAL SIGNAL OPERATOR MANUFACTURER:
MILLER AIR PRODUCTS REPORT DATE: DECEMBER 11, 1983 PREPARED BY: ilon Meyer and Mark Scott REVIEWED BY: Dennis Armstron APPROVED BY: 3.E.Rhoads 8+f+300157 00gg7 PDP@DOCK 050 PDR A VOLUME I TABLE OF CONTENTS~Pa e l.Introduction 2.Synopsis 3.Functional Description and Application 4.Limiting Condition for Operation 5.Response to NRC Concerns (Summary)5.1 Installation Information 5.2 Dynamic Torques for Worse Case Geometry 5.3 Valve Pressure Ratings 5.4 Discussion of LOCA Curves 6.Discussion of Operability 7.Summary of Structural Analysis 8.Summary of Flow Calculations 9.Qualification Summary 10.References VOLUME II Additional Attachments Attachment 8-Draft Copy of WNP-2, SER, Outstanding Issue No.26 Attachment C-Limiting Condition for Operation (LCO)Attachment D-WPPSS Letter to NRC Attachment E-Supplemental Calculations Including Final As-Built Review VOLUME III Attachment F-Structural Analysis of 30" Valves QID 361104 VOLUME IV Attachment G-Structural Analysis of 24" Valves QID 361106 VOLUME V Attachment H-In-Situ Test Results Attachment I-WPPSS Flow Calculations 21 21 28 28 29 TABLE OF CONTENTS (Contd.)Attachment J-Vendor (BIF)Flow Test and Results l)Torque Load Tests For Straight Pipe 2)Torque Load Tests With Connected Elbow Attachment K-Field Modifications, PED h Startup Work Requests Attachment L-Drawings l)2)3)4)5)6)Debris Screen Photograph Flow Diagram M543 Piping Isometrics Valve Drawings Operator Drawings Valve Data Sheets
QJAI IFICATION OF PURGE AND VENT VALVES AT WNP-2 1.0 Introduction The Nuclear Regulatory Commission is concerned about operability of the WNP-2 purge and vent valves when subjected to a postulated LOCA in combination with seismic plus hydrodynamic conditions.
Specifically, their concern is the ability of these valves to close in the time re-quired to prevent discharge of radioactive gases to the outside environ-ment.The valves identified as the containment isolation valves in the purge and vent system are as follows: Valve Number Valve Size (in)Use Location 2.0 CSP-V-1 CSP-V-2 CSP-V-3 CSP-V-4 CEP-V-1A CEP-V-2A CEP-V-3A CEP-V-4A~Sno sis 30 30 24 24 30 30 24 24 Supply Supply Supply Supply Exhaust Exhaust Exhaust Exhaust Outside Containment Outside Containment Outside Containment Outside Containment Outside Containment Outside Containment Outside Containment Outside Containment 3.0 Qualification of WNP-2 purge and vent valves for a postulated LOCA condition superimposed with a seismic/hydrodynamic event is exhibited by analysis utilizing dynamic flow calculations, detailed structural integrity studies, dynamic flow tests and investigation of actual on site configurations.
Operability was addressed by in-situ testing (equivalent static load)of the operator, dynamic flow testing of a similar valve (12")and subsequent calculations to account for dynamic air/steam flow conditions.
Final As-built qualification has been demonstrated on the WNP-2 purge and vent valves by the use of appropriate dynamic torque coefficients for associated installation configurations coupled with a restricted valve opening angle to 70 degress.Functional Descri tion and A lication The containment purge and vent valves are butterfly valves manufactured by BIF, a unit of General Signal Corporation and are identified as model numbers A-206765 (24")and model number A-206763 (30").Both sizes use Miller Air Products air cylinder operators (air to open and spring to close in the fail-safe mode).
CSP-V-l CSP-V-2 are 30" butterfly valves which are normally closed, and are open only for drywell purge, and drywell inerting.During drywell purge air is supplied by the reactor building ventilation system through these valves into containment.
During drywell inerting, nitrogen from the containment inerting system is introduced to the drywell through these valves.Valves fail closed on loss of air or power and close on F,A,Z signal regardless of operating switch position.Figure l provides a schematic flow diagram for all eight valves.Also, Attachment L Sec-tion 3 provides Flow Diagram M543 with the valve locations identified.
CEP-V-lA CEP-V-2A are 30" butterfly valves which are normally closed, and are operated only for drywell purge and drywell inerting.During drywell purge or inerting operations, the exhaust gas exits containment through these valves and is routed to either the elevated exhaust stack or to the Standby Gas Treatment System.Used in conjunction with CSP-V-l and CSP-V-2 these valves fail closed on loss of air or power and close on F,A,Z signal regardless of operating position.CSP-V-3 CSP-V-4 are 24" butterfly valves which are normally closed, and are opened only for wetwell purge, or wetwell inerting.During wetwell purge, air is supplied by the reactor ventilation system through these valves to the wetwell volume.During wetwell inerting, nitrogen from the containment inerting system is introduced through these valves.Valves used in conjunction with CEP-V-3A and CEP-V-4A fail closed on loss of air or power and close on F,A,Z signal regardless of the operating switch position.CEP-V-3A CEP-V-4A are 24" butterfly valves which are normally closed, and are opened only for wetwell purge and wetwell inerting.During wet-well purge or inerting operations, the exhaust gas exits containment through these valves and is routed to either the elevated exhaust stack or to the Standby Gas Treatment System.Used in conjunction with CSP-V-3 and CSP-V-4, these valves fail closed on loss of air or power and close on F,A,Z signal regardless of the operating position.The purge system is desicped to purge either the drywell or the wetwell.Only one entrance and one exhaust line will be open at any given time.
I SCHEMATIC FLOW DIAGRAM FOR PURGE AND VELDT VALVES fO cKVAYs'p~RAN t CCi%<5M%ho AO CONTAINMENT VESSEL cKP-Q I g CGP-V ZA 30'e(w-LS cap-v-zs 2,'<PASs@tlat!5 h<R+a~~~u~i l.A<ict ttt3 DRYWELL FRO&Ctd~a~csp-v-z cd v.l ALL~KG..QP CA~Ver<~0 csP v.~Act VACUA~asL.YAC~ZS LlE.F e m-aP l4 CQ&(@KB PIGUQE 1 g L/~ERAL'I V COMTPIMN"=MT ISOLN30N'0": I.CEP-V-IA 2.CEP-Y-2A.3.GSF'-V-I'I.C.'P-V-Z----I.UP~II I REF.Dh/&2/O.EOb7~o 7 Flow"for CSP Valves due to LOCA , 70 OP F.'ESTRIC ION Flow for CEP Valves due to LOCA Normal Flow for both CEP and CSP Valves., FIGURE 2 4.0 Limitin Condition for 0 eration The Purge and Vent System at WNP-2 for normal operation, is controlled with 2" bypass lines (two pairs)for inerting, de-inerting and pressure control.The large 24" and 30" purge and vent valves will be used only during off-power operation in accordance with the limiting conditions for operation (LCO)as shown below.Each 24" and 30" purge and exhaust isolation valve shall be normally closed during the time period: 1.Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after Thermal Power is greater than 15%of Rated Thermal Power, following start-up to within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> prior to reducing Thermal Power to less than 15K of Rated Thermal Power, preliminary to a scheduled reactor shutdown.2.The valve opening angle will be limited to 70 degrees and will be implemented prior to 5X Rated Thermal Power.Each 2" purge valve may be open for purge system operation for in-erting, de-inerting and pressure control.A complete copy of this LCO is provided in Attachment C.I r'g 5.0 Res onse to NRC Concerns (Summar)5.1 NRC Concern No.1-Valve Installations Detailed valve installation information was not provided for each valve such as: Item 1.Item 2.Item 3.Item 4.Item 5.Item 6.Direction of flow.Disc closure direction.
Curved side of disc, upstream or downstream (asymmetric discs).Orientation and distance of elbows, tees, bends, etc.within 20 pipe diameters of valve.Shaft orientation.
Distance between valves.Su 1 S stem Res onse-Valve Installations Complete details of the valve installations are provided.Figure 3 Figure 4 Figure 5 Figure 6 CEP-V-1A and CEP-V-2A CEP-V-3A and CEP-V-4A CSP-V-1 and CSP-V-2 CSP-V-3 and CSP-V-4 Item 1-Direction of Flow For normal flow considerations at WNP-2, the valves are installed in the manufacturer's preferred orientation.
Therefore, the exhaust valves (CEP)are installed in the preferred direction of flow for both venting containment and flow which is a result of LOCA.However, the supply valves (CSP)are installed for preferred flow toward containment and will be subjected to non-preferred flow direction during postulated LOCA condition (see figure 2).These CSP valves are potentially subject to reversed torque due to flow out of containment.
To assure that only positive closure torque occurs, all valve openings will be limited to 70'nd therefore precluding the negative flow induced torque.Item 2-Disc Closure Direction Disc closure directions are provided in Figures 1 through 4.For installations downstream from an elbow, LOCA induced flow tends to help close the valve.Item 3-Curved Side of Disc Installation The BIF valves used at WNP-2 do not have a curved side and the air foil lifting characteristics associated with this type of configura-tion will not exist on WNP-2 valves.The location of the seal ring is shown in figures 3 thru 6.
Item 4-Orientation and Distance of Elbows Tees Bends Etc.Detailed valve installation information for piping configuration is provided in Figures 3 through 6.Item 5-Shaft Orientation Detailed valve installation information for shaft orientations is provided in Figures 3 through 6.Item 6-Distance Between Valves 5.2 Detailed valve installation information for the distance between valves is provided in Figures 3 through 6.NRC Concern No.2-Flow Torque vs Seating Torque The worst case geometry at large angles of valve openings can pro-duce very high torques that would be considerably larger than seat-ing torque.These dynamic torques should be used in the structural analysis instead of seating torques.Su 1 S stem Res onse No.2 5.3 The qualification analysis used the larger of either seating torque or flow induced dynamic torques.NRC Concern No.3-Valve Pressure Ratings Valve pressure ratings and a static pressure analysis are not ad-dressed in the submittals.
The applicant is to provide this infor-mation for each of the valves.Su 1 S stem Res onse No.3 5.4 Valve pressure rating of 150 lbs is provided by the Vendor Data Sheets (Attachment L Section 6).Analysis for pressure loading is provided by BIF vendor calculations:
24" Valves-Attachment G, Section 7.0 Sheet B-61 30" Valves-Attachment F, Section 7.4 Sheet 7.4.61 NRC Concern No.4-LOCA Curves Included were plots of flow rate versus time from LOCA initiation for the 24 inch and 30 inch valves maintained in a full open closure from 90'o 0'hich should be deleted.However, the analysis is not affected.Su 1 S stem Res onse No.4 The LOCA curves present have two abscissa labels.Supply System agrees that the valve angle information should be deleted and that the analysis is not affected.
I.CE'P-V-IA Z.CEP-V-2A PIPE OW.30 BIF BU ITER.F LY VALVES v<oV>"~~(p I~8 EEl AIL 1~pit>(~S<>~gptll>>>II iC 0 4 IL~l~l~+T~l)
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~N~'90'.R.ELL PCOu 6UaIM6.~p"I: r//CS.an.S CSp-V-5~lhhl"h A FLOhl)I JPI BREAICEIK C~TODPEN SECT'A-A P gJ h-18 h h'h
WASHINGTON PUBLIC PNKR SUPPLY SYSTEN lNP-2 PURGE NS VBlT VALVES F PICTURE m, 1 cN To.opw PICTURE NO.3 C5LYM HASHIf'JGTON PUBLIC POi'KR SUPPLY SYSTPI MlP-2 PURGE AfS VBH VALYES A j o PICll!8E~6, 5-20 6.0 Discussion of 0 erabilit Operator operability was demonstrated by a stress integrity calculation and a static deflection test.The static deflection test consisted of applying a load at the outboard end of the air/spring cylinder equivalent to the SRSS actuator assembly CG acceleration loads.Determined from the piping analysis, in the two axes of the cylinder this load would cause the most adverse operability effect.This acceleration level times the cylinder weight, acting at the cylinder CG, was equated by an equal mo-ments approach to an equivalent force acting at the outboard end of the cylinder assembly.Flith the load applied, the air supply was removed and the spring loaded cylinder was allowed to move to its fail-safe (de-ener-gized)position.Acceptable operation of the air cylinder was its abil-ity to move from its energized position to the fail-safe position with the load applied at the outboard end.This static load method of demonstrating operability is deemed very conservative because of the following reasons: 1)Time duration of a peak seismic/hydrodynamic acceleration is very small compared to a steady (static)load.2)Static friction is greater than dynamic friction.3)Square root sum of squares of two orthogonal directional accelera-tions is conservatively applied to the worst case direction.
Conditions and results for the valve stroke tests with and without statically applied loads is provided in Attachment 3.An enveloping test was successfully performed on both the 10" bore cylinder (part of the 30" butterfly valve assembly)and the 8" bore cylinder (part of the 24" butterfly valve assembly).
Summar of Structural Anal sis Detailed structural analysis was performed on the valve and air/spring actuator.The following is a summary of the analysis performed.
Com anent Descri tion QID No.Attachment NPPSS Supplemental Calculations (Review of As-built conditions) 30" BIF Butterfly Valves 24" BIF Butterfly Valves 361104 361106 30" Valve Vendor (BIF)Calcuations 361104 24" Valve Vendor (BIF)Calcuations 361106 F Section 7.4 G Section 7.0 ll 0 A summary of critical valve components is provided in Table ZIfor 24" size and Table I for 30" size.To assure a very high confidence level, normal condition allowables (including 0.4 Sy for shear)were used as criterion for the combined postulated LOCA and seismic/hydrodynamic conditions.
Since the valve opening angle will be limited, the operational torques (LOCA)were used in-lue-of the design seating torques, thereby, providing a higher margin of safety on loading deemed less predictable while still maintaining standard margins of safety on design seating loads.
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Summar of D namic Tor ues and Available S rin Closure Tor ues The purge system valves (CSP-V-1 thru CSP-V-4)are installed with the flat side of the disc upstream.When these valves are in the full open position (90 degrees), the dynamic torque coefficient becomes negative (tends to open the valve).Based on the test results provided in the BIF report (Attachment J Report No.2)the worst case negative torque coefficient (CT=-.34)is less than the bounding torque coefficient (Cy=+.56)used in the BIF calculations.
For comparison purposes both the full open valve dynamic torques and the 70'pen dynamic torques are compared to the available air operator spring closure torque.Butterf1 Valve with Disc U stream Flow at 1 sec.and disc angle 90'Full Open Valve Size 24" 30 II Dynamic (1)Tor ue (0 enin)6,830 In.Lb.13,640 In.Lb.Actuator Spring Tor ue Available (Closure)11,900 In.Lb.23,470 In.Lb.Margin of Safet 1.7 1.7 Flow at 1 sec.and disc angle 70'pen Valve Size Dynamic Tor ue (Closure)Actuator Spring I Margin of Tor ue Available (Closure)I Safet 24" 30 ll 1,200 In.Lb.2,400 In.Lb.18,600 In.Lb.33,700 In.Lb.Not 1 Applicable IBoth Loads IProvide I Closure I Figures 7 and-8 show torques for both valve sizes at all angular positions.
(1)Torques conservatively include 1.3 factor for an elbow located directly upstream.
FIGURE//7 3~~: j6Pg=FS>-QNfii=.LBTilR-gw=:Z.mt~~4~>t tCEP2J,O.RQ,.I I.D&~owA~aFPM3 1~t~~--~'Ri'CD~B1+KPT=N(g2,'.-S-, g~t.=OF%.raew.0 EAU'-~0'5~=)EA'LV.E 0-26-j I~~!!!Ii Ii)j 5'.)Ol/i xt'I@I a!I~>>)I i~It I!,1 I!)I(gt'f j if" 11 I:(ii 1~qt(I.'jj',: 1 I (I~1 I ct)I~!i~ii el zl oj;I II z<'!X!1 ul,t oii))-~tll gl!(i.'i':: lq:!ji~1:~I);fiji~~itj ijl.: (lf~il.i~~il s ll I::ji It}I!~I!1 ('I 1 I'I I!if!I I'~ili!IIII':3 ti!I:t(i f(i(i!1 I!i jfi I 1 j Ili I!I)I~II I~:I~~!!>>" fi ,1 Ij~jim!i'lit s~i!::I!'i'I~Il flij iii::II'!I'tis lit~i)ittj tfi~!!lf ,ii!!111!j!I ji):: Q>>I jiff~(!I ti)'el)sit)!':i I I I, I~~~a!!j~~I!!I!!" ij!1:lil!g9 set tjji'.i!l ljif si f~I I jij!!ij'l!I i)"l i++)!L..I>>ilj(if!i ll!!I;~,~~I IL)1 I~tisi i~I ('>>tf:.is i!ii':I!iii fels>>~j Iiii:.!.g2'44 i/0 I!j;j!'I it)li'I!,':iii i!I!!i'!I!i.
!'I'~tf I!I:)j,i"" i(j't~~~~II~I!(i Ljl(t)t: j'@@e~I i~il s sI s I>>'It s}if lI!!i.lii It'(jsett!!II fiji i!1)sit I!!I~~I s,)it;1>>(I js!1)1.I lii.l 3 I I!l I EEI'!I I"li Iji tf'I II iifi jj I:!i~aa~tt.!ll Ljlt (Its~I,'~~I!I Il I(tl LLti e!1 ijj (Iit it a;si 1!'A lilt fljl I!.i II Uf It(I;j!(f set I~tete>>>>1~I)II SS VV~ii: I t I~It i.~I t~I li)J}ltl1>>'t I~!ljj~1~(I I~(te+jil)I I)I 5 il!iii!T&W(It!i I I itt i'I!i i tie~'V.I~~i!I">>'II~!I!I~II I~i~if j'iij i!4I iii!I Il!I Ts~s ii tii: et'ttt Ij}:,'jH s~at}!I!i I~It!I I li I Iff ttj(I iE!i!lt'I I (I t iD Liii I>>!)at!,E'.), lii!'i Qii'ILt iifi lj!(jj!,!If I:II I, I, jji;:!.0 I>>Sj f~f jjii 0.il II It ii!i iii!III)It)I iet>>ii I)ft (11()tee f447.1!I!fi,!,'i:~:!!I 1'I~I~~I!Il I~!I!i!g)ill~)I I!I iii I,'I ti~Ie I I tt'j I((if(1}TI}ll.j tts~lil!',1st P.~!I I'~~'fi I~I jli~1st~'1 Ii~~!I (eft I~jil iti II~1!A i:;i if~!i it i)~I.I I Is j!ij jtij jit;!!!I Irl i!i.I~}It~IIIll!ll 1!!~jjjj I D:U.}~te~~I!a~It 1, K~I ii!I I iii sl~ii t~I I I,~I ji!"!~I II lilt j('t!jj li tl ji 4'li: lll!i!I!it,i I)11 I!11 I)t I)PISC%~K~~~(ttlematam) lj jj yi]jij j!I'I I!IIII I I il P(SC I i Ul sTlccw iii'l'!I!!!!!l(j l ijil j!',gf'it I~\t II~II I 8.0 Summar of Flow Calculations The shortest purge line with the lowest flow resistance was analyzed to determine the Mach number of the fluid flowing through the butterfly iso-lation valve as a function of valve opening angle.Based on this analy-sis, it was determined that valve angle positions of 70'r less will assure that the Mach number through both the inner and outer isolation valve remains below Mach number 0.3 following a postulated LOCA.The containment pressure and temperature used as a forcing function for this analysis were obtained from the WNP-2 FSAR (figures 6.2.2 and 6.2.3)for a postulated DBA.Containment pressure obtained from these figures was based on the assumption that there was no fluid leaving containment. If the purge valves were open the containment pressure would be slightly less than that used in this analysis.Flow calculations are provided in Attachment K.9.0 Qualification Summar 9.1 The 30" and 24" diameter purge and supply valves are closed for normal plant operation since the small 2" lines will be used for inerting, de-inerting and pressure make-up.9.2 NRC has recommended the disc opening be limited.Prior to 5X power, WNP-2 will install a mechanical device which limits the opening to 70 degrees.This restriction on valve opening coupled with appropriate dynamic torque coefficients resolves safety and qualification concerns for LOCA conditions. 9.3 Due to the pipe length and associated line loss coefficients; the maximum flow velocity for full open valves was calculated to be 0.33 Mach number, thereby assuring that correlation methods used with compressible fluid calculations as previously presented is valid.With a restriction on valve opening, the Mach number will be less than 0.3 for all conditions. Additional conservation is introduced because the LOCA pressure and temperature curves did not take credit for flow through these valves during closure time.Also, the pressure excursion assumes a very conservative double ended pipe break.9.4 As-built configuration of the valves (especially with the 70 degree angle restriction) precludes the possibility of flow induced opening torque.Therefore, the air operator spring and flow will combine to assure valve closure in less than the required 5.0 seconds.9.5 Structural integrity of these purge and vent valves has been at-tained by combining two faulted conditions (SSE/Hydrodynamic plus LOCA)using normal allowables. This includes shear allowables of 0.6 Sm for pressure boundary ASME components and 0.4 Sy for AISC components. A table which summarizes the calculated stresses and allowables is provided in Attachment I. NOTE Field modifications to strengthen the support brackets and replacement of bolts have been performed. Documentation is provided in Attachment K.9.6 Since the valves are normally closed, there is a low probability that LOCA conditions will occur with the valves open.Furthermore, a very low probability of all three conditions (valves open, LOCA and seismic/hydrodynamic) will occur simultaneously. Therefore, this very conservative approach of combining all three unlikely con-ditions and comparing to Normal/Upset condition allowables exhibit large confidence levels.9.7 Operability was demonstrated by analysis and in-situ (static load)testing.9.8 In conclusion the purge and vent valves satisfy all the Equipment Qualification criteria implemented at WNP-2 for'even 90'full open)valves.Limiting the disc angle to 70'rovides additional margin to address the following NRC concerns.Therefore, our WNP-2 design: 1)Assures dynamic torque due LOCA conditions will always be a positive closure torque.2)Assures Mach Number will be less than 0.3, and 3)Limits magnitude of dynamic flow induced torque.10.0 References 10.1 NUREG-0892, WNP-2 SER Outstanding Issue No.26,"Operability of Purge Valves" 10.2 NRC Standard Review Plan 6.2.4,"Containment Isolation System" Containment Systems Branch (CSB)10.3 Branch Technical Position CSB 6-4,"Containment Purging During Normal Plant Operations" Supplement to SRP Section 6.2.4 10.4 Letter, A.Schwencer (hRC)to R.L.Ferguson (SS),"Request for Addi-tional Information", dated September 16, 1982, Docket No.50-39 10.5 WPPSS Letter, February 24, 1983, G.D.Bouchey to A.Schwencer (hRC)with Attachments 10.6 WPPSS Letter, June 22, 1983, G.D.Bouchey to A.Schwencer (hRC)with Attachments VOLE%II 1'PPSS'JALIFICATION OF PURGE ANO YENT VALVES AT lOP-2 ATtAC8'HA' -DRAFT COFY OF lOP-2, SER, OUTSTANDING ISSUE NO.26 ATTACHMENT C-LINITII'6 CONOITIPS FOP, OPERATION (LCO)A1TAHBIT D-, I'FPSS UTIER TO NRC" ATTAQK'6 E-SUPPLEMENTAL CALCULATION INCLUDING FINAL AS-BUILT REVIBt g~HIi";Os 'NUCLEC.R PROJECT 2 DOCXET NO.50-397 tiOP P,', 0~NSTRATION OF CONTAINMENT PURGE ANO VENT VALVE OPERABILITY/ 1.0 Requirement D~nstratfon of operability of the contafanent purge and vent valves, par-ticularly the ability of these valves to close during a design basis accident, is necessary to assure contairnent isolatfon. This d~nstration of operabfl-fty is required by BTP CSB 6-4 and SRP,3.IO for containrant purge and vent yalves~fch are not sealed closed during ooeratfCCWcondftfons I, 2.3, and 2.0 Descrf tion of Purge and Vent Valves The valves fdentfffed as the contafnrent isolation valves in the purge and vent system are, as follms: Yal ve Nunber inches Use Location CSP-VA CSP-Y-2 CSP-Y-3 CSP-Y-4 CEP-Y-IA CEP-Y-2A CEP-Y 3A CEP-Y-4A 30 30 24 24 30 30 24 24 Vent.Vent.Yent.Vent.Vent.Vent Vent Vent.~Supply Supply Supply Supply Exhaust Exhaust Exhaust Exhaust Outside Contafrgqent Outside Contafnrznt Outside Contafrnent Outside Containrent Outside Contafrwent Outs ide Conta f nnant Outside Contairaent Outside Conta'fnrent 1.The conta$rnent purge and vent valves are butterfly valves manufactured by 8IF, a mft of General Signal Corporation and are listed as BIF Model Hurdler A 2M765 (24" valves}and 8IF Hodel Nunber A-206763 (30 valves}.%lier Air Products Corporation Model A-83 cylinders (afr open-spring closed)are used for valve actuation The 24-inch valves use 8" cylinders and the 30'alves use 10'ylinders. p)gal 3.'0 Geaanstratf on of erabil it.3.I Vhshfnqton Pub'lic Pomr Supply System (MPPSS)has provided operability d~nstratfon fnformatfon for the containment purge and vent system isolation valves used at their Mashington Nuclear Prospect 2 (MHP 2)in the following. sutmf ttal s: Reference A MppSS letter, F'ebruary 24, 1983, G.G.Bouchey to A.Sch~encer (NRC). 2 FA Reference 8 p>1 jt[t c t'-'ihhC Ee.VPPSS letter, June 22,)983, G.D.Bouchey to A.Schxencer (%C).3,2~termination of dynamic torques durfno valve closure against the bufldup of containment pressure during a LKA is based on dynamic torque coefffcfents CT obtained fry BlF tests performed using different types of disc geometry and disc and shaft orientation xith respect to direction of flow.The test~i~fs mter and no air.testing xas performed. One of the test conffgura-included a directly connected short radius elbox upstream to study the qffect of flox non-uniformity on dynamic torque.Several tests xere a so per-t ons inc r 1 fo~fifth the valve shaft vertical and horfzontal, counter clockxise opening and clockxfse opening, xith flatside upstream and flatsfde doxnstream. Frcn these tests, the most severe case xas determined.to be a vertical shaft orfen-tatfon ($.e.perpendicular to the plane of the elbow)with the flatsfde of the disc d~stream and xfth a clockxise rotation of the disc.Thfs orfentatfon results in an approximately 30K increase in maximum dynamic torque coefffcfent over the straight pipe inlet configuration. Torque coefficients used to de-temfne dynanfc loads for VÃP-2 purge and vent valves are based on this.xorst case configuration. The dfffereetial pressure 5 p across the valve is calculated fron the data on vol~trf c fl ox rate under LOCA conditions, and using the equat io P)2-PZ2 g 963 Cv xhere g~6as f1ox in$CFH P P)Valve upstrean pressure (psfa)P2 Valve downstream pressure (psfa)6~Specffic gravfty T~Upstream temperature in oRankine)2 C Ye1ve coefficient 29.9 D Y Xv.D Valve Port diameter ()n.)Kz-"Coefficfent of floor go load closure tfme for the valves ranged from)1/2 to 4 seconds based on tests performed at BIF The maximum no load closure tine af 4 seconds fs used for the analysis xith a one second instrumentation tive delay for a total of 5 3'lij li r g":I~-L3 econds frcxn LOCA fnftf ation-to-valve closure..As an addi tional conservatisn, the d~ll pressure and temperature rise during a LOCA is used for a11 vol ves.Dynmfc torques are calculated for both saturated stean and air as the flow~fa.The calculations are summarized and shorn belo~in Tables I, 2, 3, and 4 (Reference 8)for both the 24-inch and 30-inch vaIves and for steam and air fl ec.The peak dynadnfc torqaes during closure and the seating and bearing friction torques at oo are ccapared to the design torques usedD~he~ei~eic analy-sis rcport and indicate posftive margins;SUHHARY OF RESULTS Table 1.30-inch Valve, Airflow, (TNET 2217i in-lb)-1.0 1.5 2.0 2.5 3.0 3,5 4.0 4.5 5.0 Angl e s deg, 90{Full Open)78.75 , 67.50 56.25 45.00 33 75 22.50 11 25 9.0 (Full c1osed)Dynam)c Torque in-lb.II020 2309S X813S 14747 12428 10780 8014 3972 0.0<<Qg JEST<<At full closed position, the dynamic torque is zero and the net torque is due to seating and bearing friction.v~g Note: The design torque used in the seismic analysis report No.Ill-74-B byM~A'~t 1 t 27m in-lb.. $~SueSRT 0-.RESULTS gable 2.30-Inch Valve, Stean fl~, (TgET 22l74 in-lb}Tithe Angledeg~Dynamic Torque in-lb.E.o 1.5 2.0 2.5 3.0 3 5 4 0 4 5 5.0 90{Full Open)78.75 67.50 56.25 45-00 33.75 22.50 11.25 9.0 (Full closed)11032 23175 18142 14668 l2424~"~"-c g;~i'0580 7809 3867 0'.0+"At full closed position, the dynariic torque is zero and the net torque is due to seating and bearing friction.SUNDRY OF RESULTS Table 3.24-ln'ch Valve, Airflx, (TgET 13808$n-lb)Angle a deg.Dynamic Torque in lb'.0 1.5 2.0 2.5'.0 3.5 4.0 4.5 5.0 90 (Full Open)78;75 67.50 56.25 45 OD 33 75 22.50 11 25 9.0 (Full closed)5525 11692 5430 4043 2020 0 pe At full closed position, the dynamic torque ts zero and the net torque is due to seating and bearing friction.ate: The design torque used in the seismic analysis report No.TR-74-8 by HcPherson-Assoc!atesDo~this valve is}7000 SU~RY OF RESULTS f"ran(f" i.j(/i//Table 4-24-Inch Valve, Steamflo~, (TgET.1380B in-lb)Ti)2)e (s)Angle o dege Dynamic Torque in-lb.l.0 1 5 R.Q Z.5 3.0 3.5 4.0 4.5 5.0 90 (Ful>Open)78.75 6?.50 56.25 45,00 33.75 22.SD Il.25 9.0 (Full closed)5425 11394 p.B92l 6109 5202 3S42'902 0.0++At full c1osed position, the dynamic torque is zero and-the..net torque is due to seating and bearing friction.3.3 D~nstration of actuator torque margin is based on the mini(((~spring force developed which 5s equal to the spring pre-load.24-inch valve 8 c linder)>6,890 fn-lhs (preload)>13,80S'.n-lbs (seating torque).30-fnch Valve 10-inch c finder)32,422 in-1bs (preIoad)>22.174 in-1bs (seating torque)g///.d4 3.4 gppSS provides a structural analysis for the puraewnd vent valves and their operators in Reference B.This consists of ((3)Seismic/Hydrodynamic Requalification Reports for the 30-inch valves, 24-inch valves, and the operators. The requalification certificates far both the 24 and 30 valves are contingent upon ear bolt modifications and the addition of shear plates.*Acceptance criteria for the structural analysis are taken fro())Section III of the ASHE Boiler and Pressure Vessel Code or the AISC Constructin Hanual, whict)ever $s applicable. Load used in the analysis are the valve operating load crab-;ned eth the dynamic loads vhich would result frcm seismic and h+rodyna=ic events as det.eminc=- by the piping analys',s for the plant. h ~p Ao SR$S onalysfs ms set uj tn a caepUter prop ea for each valve assembly fn fts specfffc orfenAt'fed@ The SOS fs~en'at the maxfain stress lese)~to sefsirfc, 9-)oadfng. Qperatfag. loads de to seatfng torque force and de-d~fight are cceMaed H&the sefsefc stress by absolute sm..Ba~on tte results of the structural analysfs.the valves 41)reefs fac-'t)oaal through f'orth'ears af postulated hydrodyn~c events, ffve operating basf s earthquakesand one safe shuteye.earthcpake. 4.D-Kva1oatfon 4.l The detemfnatfoa of dynaafc torques Kr.MPPSS pe'ge'and vent valves ader I.XA condftfons fs tesed on the testfng by the valve supp)e'er (SIF)of I aodel valve using mter as the test medfum.Tests conducted Hth a short el-dfrectly upstream, valve shatt at%P to the p)aine of the e)bee, and flatsfde of dfsc deestre~fndfcitid i 3'.fncrease fe maxfmw, dyneafc tor-que coefffcfeC for tMs erst case geaaetry.Vsfng data froo Node)tests performed by other valve aanufacturers wftb afr as the test aedfea, tMs erst case geometry prodtmes 0 3'ncrease fn aaxfmm dynarnfc torque coefffrfent The-large'.dffference (3'.}ater versus 300j'.afr)fn aaxfeen dynaefc torque.coefffcfent f s due to the hfgher (above%ch-.3j velocftfes at large angles of openfng%ere the cbmwfc torque coefffcfents peak;Oyaanfc torque coefff-'fests frit Nocfel tests usfng fnc~xmsfhle flufds correlate reasonably cell Hth data free tests usfsg afr f f the vHocftfes are helm a Kacb nveber of 0.3).Ccesfderfng the.ana1ysf's results tabulated fn Table 1 of Reference A, the peak 4ynaafc torq~for the K-fnch valve occurred at?8.75'M was 23,098'fa-)bs.The desfw torque fs 2'7,800 fn-)bs ns noted fn the same table.Qp'lying a 30gf.increase to the 23098 fn-Ebs peak dynesfc torque&feb al reefy has a'3%erst case conffguratfon factor;the peak dynaxfc torque usfag the factor froa afr tests mrks mt to 48,505 fn-lbs, wll@bere the 27,NO fn-lhs des f go torque Aa acceptable approach to the staff fnstead of.the coeservatfm erst case conffguratfoa used Q the lfcensee seal@be the use at'pproprfate ~enfc torque coefffcfeats for each valves fnsta3)atfoa cosffguratfen coupled Qth a restrfctfoa oa valve openfeg Deaf laf valve fnstallatfen fnfoeratfon ms not provfdeci for each valve shah i!$'.Nrectfoa of flm.2.Nsc closure dfrectfon. 3.Curved sfde of 4fsc, upstr'earn or 4oenstrean (asya~etrfc dfscs).4.Orfentatfoo and df stance ot elboee, tees, beefs, etc Hthfe RO pfpe df aNIRters of viil ve.S.Shaft orfentatfon. 6.Nstance bet~val ver.~~I~~~~~~~~~~~-~~~~~~~~~~~~ ~E'"..-".'.4.2 As deaestrated $n 4,1 of this report, the terst case geanetry at lative a~'les of va'l~opes1ags can price wry h0gh torques that~)d be con-sidf rab>y larger than the seating to~..5~se dynamic torques shogld be.used fn.the structvral analysis (Ref'erence 8)insteH K the seat'5ng torques.4.3 Y'alve'presses e rat$rgs ed a static press'-e analysis are'et addressed.$n the suberttta'ls. --provide this$nfonat$aa for each of the va1ves<<4.4 Reference R fncludus plots of floe rata versus tine fran LX.A initiation for the 24-fnch and 3n-inch valves veintainod fn a full open po'sition.The I-*--abscissa incorrect)y includes vail c1asure f'rm~to Oo, Rich Auld be deleted Hecever, the analysis fs tet affected-5.0 Suwarg Nh trave caarpleted our rerum of the infnmat$ie submttid'ta date, concerning the operabfli of the H-$nch ed 30-inch valves used fa the carrbtiemnt ptn'ge and vent cyst~for Qhshiagtan nuclear PH)act 2'.lk find ttet the informatics'sube)t~ for tha 24-inch and 30-inch valves cHd not deaenstrata that these valves have the ab$7fty to clos4.against the M1dup crf press~<n the eh'erat of a 9BQLXh fron the ful1 apeh position.Paragraphs 4.2, 4.2, and are the bases for these findings.For this reasce, the 24-inch and 30-inch va1ves sold'be sea1ed c$asaf in accordance Htb SRP Sectfce 6.2.4 and-2~TlI 5.f.FMrthe~re, these valves should be verified to be closet at'teist ofhce cvog'da)$+v CONTAINMENT SYSTEMS DRYWELL AND SUPPRESSION CHAMBER PURGE SYSTEM LIMITING CONDITION FOR OPERATION 3.6.1.8 The drywell and suppression chamber 2-inch exhaust isolation valves shall be OPERABLE and: '.Each 24-and 30-inch purge supply and-exhauae-iaaiaaien-vabre-shall be closed during the time period: 1.Within 24 hours after THERMAL POWER is grehter than 15~of RATED THERMAL POWER, following startup, to 2.Within 24 hours prior to r educing THERMAL POWER to less than 15'f RATED THERMAL POWER, preliminary to a scheduled reactor shutdown.b.Each 2-inch purge valve may be open for purge system operation for inerting, deinerting and pressure control.c.Each 24-and 30-inch purge supply and exhaust isolation valve shall be limited to open no more than 70 degrees.APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, and 3.ACTION: a.With a 24-and/or 30-inch drywell and suppression chamber purge supply and/or exhaust islation valve(s)not closed, close and/or seal the 24-and 30-inch valve(s)or otherwise isolate the pene-.tration within 4 hours or be in at least HOT SHUTDOWN within the next 12 hours and in COLD SHUTDOWN within the following 24 hours except as provided for in 3.6.1.8.a. b.With a 2-inch drywell and suppression chamber exhaust isolation ralve inoperable or open for other than inerting, deinerting, or pressure control, close the, open 2-inch valve(s)or otherwise isolate the penetration(s) within 4 hours or be in at least HOT SHUTDOWN within the next 12 hours and in COLD SHUTDOWN within the following 24 hours.c'ith a drywell and suppression chamber purge supply and/or exhaust isolation valve(s)with resilient material seals having a measured leakage rate exceeding the limit of Surveillance Requirements 4.5.1.8.2, restore the inoperable valve(s)to OPERABLE status within 24 hours or be in at least HOT SHUTDOWN within the next 12 hours and in COLD SHUTDOWN within the following 24 hours.WASHINGTON NUCLEAR-UNIT 2 3/4 6-11 CONTAINMENT SYSTEMS 4.6.1.8.1 Each 24 and 30-inch drywell and suppresion chamber purge supply, and exhaust isolation valve shall be verified to be closed at least once per 31 days.**4.6.1.8.2 At least once per 92 days each group shown below of drywell and suppression chamber purge supply and exhaust isolation valve with resilient material seals shall be demonstrated OPERABLE by verifying that the measured leakage rate is less than or equal to.05 L when pressurized to P..a a Valve Grou a.CEP-V-1A and 1B CEP-V-2A and 2B Maximum Leaka e Rate.05 L*b.CEP-V-3A and 3B CEP-V-4A and 4B;05 L*a c.CSP-V-1 CSP-V-2..05 L*d.CSP-V-3 CSP-V-4 4.6.1.8.3 Each 24-and 30-inch purge supply and exhaust isolation valve 70 degree open limiting device shall be functionally tested at least once every 18 months.*These valves are tested in parallel with the maximum leakage allowed for a single valve applied to the group.**Valve operation as provided for in 3.6.1.8.a shall be under administrative con rol only. Internal Distribution T Harrold-982A Martin-927M Powell-956B PK Shen (JMY)-580 SI Stevens-956B WW Waddel-9670 JE Rhoads-9670 Docket Fi1 e-956B kt/file-994E PL2/LB-956B JDM/LB-927M GCS/LB-340 sf (2)WNP-2 Files bcc: WG Conn B&R RO NS Reynolds-D&L Docket No.50-397 Director of Nuclear Reactor Regulation Attention: Mr.A.Schwencer, Chief Licensing Branch No.2 Division of Licensing U.S.Nuclear Regulatory Commission Washington, D.C.20555 December 8, 1983 G02-83-1129
Dear Mr.Schwencer:
Subject:
References:
NUCLEAR PROJECT NO.-2 QUALIFICATION AND OPERATION OF WNP-2 CONTAINMENT VENT&PURGE VALVES a)Letter, A.Schwencer (NRC)to R.L'.Ferguson (SS),"Request for Additional Information", dated September 16, 1982 b)NUREG-0892, WNP-2 Safety Evaluation Report, Out-standing Issue No.26,"Operability of Purge Valves" c)Letter, G02-83-170, G.D.Bouch'ey (SS)to A.Schwencer (NRC),"Vent 8 Purge Valves", dated February 24, 1983 d)Letter,'02-83-550, G.D.Bouchey (SS)to A.Schwencer~(NRC),"gualification of WNP-2 Containment Vent and Purge Valves", dated June 22, 1983 References a and b contain NRC.requests.for information regarding the WNP-2 containment vent and purge valves and References c and d are the Supply System's responses.'to the requests.",:These concerns have resulted in a proposed Technical Specification Limiting Condition for Operation (LCO), for WNP-2 (Attachment A)., This LCO would seriously impact the WNP-2 plant's ability to properly carry out initial power ascension testing and operation. The purpose of this letter is to bring to the NRC's attention, additional infor-mation concerning the Supply Systems action to resolve this issue and to propose an alternate Technical Specification LCO (Attachment B).This LCO'is consistent with the LCO that provides for the drywell and suppression chamber atmosphere inerting (Reference Technical Specification 3.6.6.2)and will allow compliance capability. AUTHOR: SECTION FOR APPROVAL OF APPROVED/P DATE'd FOR SIGNATURE OF: A.Schwencer Page Two December 8, 1983 QUALIFICATION AND OPERATION OF WNP-2 CONTAINMENT VENT 8 PURGE VALVES The Supply System is aware of NRC concerns which resulted from the staff's review of references c and d.These concerns have been discussed with the Equipment gualification Branch and their consultant. The result of these discussions is the Supply Systems commitment to limit the valve opening angle to a point that provides a maximum air velocity equal to or below a Mach number of.3.This corresponds to a maximum valve opening of no more than 70 degrees (with full open equal to 90 degrees).Appropriate valve limiting devices will be installed prior to exceeding 5'A power.A revised package detailing the field modification to limit valve opening and demonstrate that the information provided in references c and d is appropriate with this valve opening limit will be provided by December 16, 1983.Based on the Supply System commitment to limit valve opening, it is understood that the LCO which now requires that they be 1'ocked sealed closed may be relaxed.Provided in Attachm nt B is the Supply System recomnendation to a revised LCO that would allow Safe Operation of WNP-2 with the subject valves appropriately modified.The Supply System's planned December 16 submittal will provide the appropriate data to address the concerns now in place.Should you have any further questions, please contact Mr.P.L.Powell, Manager, WNP-2 Licensing. Very truly yours, G.C.Sorensen, Manager-Regulatory Programs JER/tmh ,.Attachments-4 cc: R Auluck--NRC WS Chin-BPA AD Toth-NRC Site R Wright-NRC D Hoffman-NRC F Eltawila-NRC ATTACHMENT A CC Cu.rri.OV CGNTA<.'i.'.<chT SYST=MS DRYWELL">O SU'7PRE":: ./CHi4~/BE&7"RGE"hh~y.s"fiU~Jf'r PPg'ir.'f!j ~a~.I LIHITIHQ CONDITION FOR OPERATION 3.6.1.8 The drywell and suppression chamber 2-inch purge supply and"exnaus:"----- isolaticn valves shai'.be OPERABLE and: a.Each 24-and 30-inch purge supply and exhaust isola icn valve snail be sealed closed.Each 2-inch purge valve may be open for ourge sys em coerat.on for inerting, deirer ing zna pressure con rol.APPLICABILITY: OPERATIONAL CCNOITICHS 1, 2, and 3.ACTION: a.With a 24-and/or 30-inch dr~e11 and suppression chamber purge supply and/or exhaust isolation valve(s)open or not seaIed closed, close and/or seal the 24-and 30-inch valve(s)or otherwise isolate tPe penetration within 4 hcurs or be in at leas HOT SHIJTOQ'i'd% within the next 12 hours and in COLO SHUTOBr'H within the fol cw ng 24 ho rs.With a 2-inch drywell and suppression chamber purge suppTy and/or exhaust isolation valve(s)inoperable or open or other than inerting, aeinerting, or pressure control, close the open 2-inch valve(s)or otherwise'.solz-e the penetration(s) within 4 hours or be in a least HOT SHUTDOWN'wi Din the nex.~D hours and in COLD SHUTDO'~H wi nin the following 24 hours.c.Nth a drywe11 and suppr ss',on chamber purge supply and/or exhaus isolation valve(s)wi h resilient material seals having a measured leakage rate exceedir g the iimit of Surveillance Requirements 4.6.1.8.3 and/or 4.6.1.&.4, restore+he inoperable valve(s)to OP&ABLE status within 24.hours or be in at least HOT SHROOM within.Ne next 12 hours and in COLO SHUTDOlA wi Din the.ollcwing 24 hours.t SURVEILLANCE RE UIR~EHTS 4.6.1.8.1Each 24-and 30-inch drywell and suppression chamber purge supply and exhaust isolation valve shall be veri ied m be sealed closed at least once per 31 days.4.6.1.8.2 At leas."nce per 6 closea 2~-and 30-incn dwell isolation valve with r silient by veri ying.hat the measured when pressurized to P.months on z STAGGEREO TEST BASIS each sealed and suppression chamber purge supply anc exhaust mater'.al seals shall be demonstrated OPERABI~leakaoe ram is less than or equal w 0.05 L'rlASH!ia<i"N NUC~+R-IJNIT 2~/4 6"' C NTAINMEHT SYSTBtS JRVEIL&NCE REQUIRED".EHTS Continued) 4.6.1.8.3 At least once per 92 days each 2"inch~r..~el'--ana s'-ppv ssion chanber purge su"ply and-exhaust iso'a ion valve witn resilien-m.er al s alshall be demonstrated GPERABI c by ver.'fying tha--he"easured leax ge rate is less han or eaual to 0.01 L linen pressuri ed to P.a'7=,.Vyl+~-.~~8"k~~'ASHINGTON NUCLEAR" UNIT 2 3/4 6-32 'l~~ATTACHMENT B"DRAFT LCO" CONTAINMENT SYSTEMS DRYWELL AND SUPPRESSION CHAMBER PURGE SYSTEM LIMITING CONDITION FOR OPERATION~~3.6.1.8 The drywell and suppression chamber 2-inch exhaust isolation valves shall be OPERABLE and: a.Each 24-and 30-inch purge supply and exhaust isolation valve shall be closed dyring the time period:~>g~~l.Within 24 hours after THERMAL POWER is greater than 15>of RATED THERMAL POWER, following startup, to.2.Within 24 hours.prior to reducing THERMAL POWER to less than 15%of RATED THERMAL POWER, preliminary to a scheduled reactor shutdown.b.Each 2-inch purge valve may be open for purge system operation for inerting, deinerting and pressure, control;c.Each 24-and 30-inch purge supply and exhaust isolation valve shall be limited.to open no more.than 70 degrees.APPLICABILITY:,OPERATIONAL;CONDITIONS,l, 2, and 3.ACTION: a.With a 24-and/or 30-inch drywell and suppression chamber purge supply and/or exhaust islation valve(s)not closed, close and/or'.seal the 24-and 30-inch valve(s)or otherwise isolate the pene-tration within 4 hours or be in at least HOT SHUTDOWN within the next 12 hours and in COLD SHUTDOWN within the following 24 hours-.except as provided for in'3.6.1.8.a; C~b.With a'2-inch-drywell and suppression chamber exhaust isolation ,.valve inoperable or.open.for.other than inerting, deinerting,or'pressure control,"'close the open 2-inch valve(s)or otherwise isolate the penetrati'on(s) within 4 hours or be in at least HOT-,.SHUTDOWN within the next 12.hours and in COLD SHUTDOWN within the fo11owing 24 hours.4~o~FO C~With a drywell and suppression chamber purge supply and/or exhaust'solation valve(s)with resilient material seals having a measured leakage rate exceeding the limit of Surveillance Requirements 4.5.1.8.2, restore the inoperable valve(s)to OPERABLE status within 24 hours or be in at least HOT SHUTDOWN within the next l2 hours and in COLD SHUTDOWN within the following.24 hours.WASHINGTON NUCLEAR-UNIT 2 3/4 6-11
CONTAINMENT SYSTEMS SURYEIl LANCE RE UIREMENTS 4.6.1.8.1 Each 24-and 30-inch drywell and suppresion chamber purge supply and exhaust isolation valve shall be verified to be closed at least once per 3l days.~4.6.1.8.2 At least once per 92 days each group shown below of drywell and suppression chamber purge supply and exhaust isolation valve with resilient material seals shall be demonstrated OPERABLE by verifying that the measured leakage rate is less than or equal to.05 L when pressurized to P.Valve Grou Maximum Leaka e Rate a.CEP-V-1A and 1B CEP-Y-2A and 2B.05 L*b.CEP-Y-3A and 3B CEP-Y-4A and 4B.05 L*a c.CSP-V-I CSP-Y-2.05 L" d.CSP-V-3 CSP-V-4.05 L+4.6.1.8.3 Each 24-and 30-inch purge supply and exhaust isolation valve 70 degree ope'n limiting device shall be functionally tested at least once every-18 months.t.*These valves are tested in parallel with the maximum leakage allowed for a single valve applied to the group.Valve operation as provided for in 3.6.l.8.a shall be under administrative control only.
4A r7ASIG'iGTON PUBIC PO4 ER SUPPLY SYS'I'd lit g)I't 7 T~~~1+5 (~'~P~fONEHT HO, CSP-V-l COMPONENT DESCRIPTIOXi t CSP-V-2 CEP-V-lA, CEP-V-2A 30" Cylinder Operated Butterfly Valves/ID 361104 BIF MANUFACTURER EGUIPMEHT CLA~SIFIC*TION1 Q ACTIVE UPAS IVF.A-206763 MODEL NO1 SEISMIC QUALIFICATION REPORT REFERENCE1 1.Ci na Ener v Services Re ort No.0.01.F Rev.2 dated 6/15/83."30" Cvlinder 0 crated Butterfl Valves", 2.'WPPSS Su lemental'alculations, EO-02-83-11"Final As-built Review of Pur e and Vent Valves (BIF)" EN V I RON M KNTAL ClUALIF I CATION REPORT REFEREN CKz Certificate of qualification is.for seismic/hydrodynamic and postulated LOCA conditions. THE ABOVE SEISMIC AND ENVIRONMENTAL QUALIFICATIOH REPORTS HAVE BEEN REEVALUATED IN ACCORDANCE WITH TNE CURRENT HRC SEIS'MIC AND ENVIRONMENTAL CRITERIA1-~l I EEE STANDARDS S44 (I S7S).USNRC REGULATORY GUIDES l>Z, 7.100 STANDARD REVIEW PLA 5DNt S lOt ell 4 NURKG<SSS THE ABOVE COMPONENT HAS BEEN FOUHD ACCEPTABLE FOR PERFORMING ITS INTENDED SAFETY RELATED FUNCTION WH-H SUK'EC i ED TO THE PLANT SPECIFIC-VjBRATORY AND ENVIRON)4ENTAL LOADS, REVIEWED BY Hark Scott Dennis Armstrong 12/14/83*12/14/83 c"T'2/14/83 I~jf~~~~0 KASHL4GTON PUBLIC FO>>r R SUPI LY ST PiI:QC:(LIr lC.'.I i0 C".'.TJHC.:: C: D 361106 CSP-V-3 CSP-V-4 CSP-V-5 CSP-V-6, CSP-V-9, CEP-V-3A, GEP-V-4A COMPONENT Hot t 24" Cylinder Operated Butterfly Valves COMPONENT DESCRIFTIONt I.IANUFACTURER'QUIPMENT CLASSIFICATIONt Q ACTIVC Q tASSIVC)(DDEL NO, A-206765 SEISMIC QtfALIFICATIbN REPORT RKFKRENCdt 1.C na Ener Services Re ort No.OT;01".F,"24" Cylinder Operated"Butterf3P'a3wes",- Rev.4, dated 11/'ll/83. 2.MPPSS Supplemental Calculations EQ-02-83-11,"Final As-built Revie" of Purge and Vent Valves (BIF)" ENVIRONMENTAL QUALIFICATION REPORT REFKRENCKt ated LOCA-THE ABOVE SEISMIC AHD ENVIRONMENTAL QUALIFICATION REPORTS HAVE BEEN REEVALUATED IN ACCORDANCE WITH THE CURRENT NRC SEISMIC AND ENVIRONMENTAl CRITERIAt~1.IEEE STANDARDS 544 (ISTS)~Z.USNRC REGULATORY GUIDES 1A2, 1 100 S.STANDARD REVIEW PLAN SD>, S.la S.11 4 NUREGASSS THE ABOVE COMPONENT HAS BEEN FOUND ACCEPTABLE FOR PERFORMING ITS INTENDED SAFETY RELATED FUhCTION'HEN SUBJECTED TO THE PLANT SPECI F IC VIBRATORY AHD ENVIRONMENTAL LOADS PREPARED BY Mark Scott X~rf REVIEWED BY p Milon Mever'I r, Af'PROVED BY Dennis Armstrong I*" i2(i~ist i 12/14/83 I 12/14/83 WASHINGTON PUBLIC POWER SUPPLY SYSTEM CALCULATION COVER SIIEET SHEET OF PROJECT CONTRACT DISCIPLINE MCOI W~Y'3dA.L.>miC.AmO< SPECIFICATION 2&o8-8 CALC.NO.EQ-oz-a3-t I QUALITY CLASS STEM NO CKP~C5'P SUB C EQ IP E P EC CBP-'V-/A,ZA)>~)~) +&V'-I-I)2)3,4)%,6)QI CO<i~)0 V5KhJ II P-E<W R~I zvv P<w Su&nAmw p Fi Aa~ASm OIL.~LO+X'RWI tM ACTION REQUIRED@SAR CHA~GE Q SPEC.CHANGE@OTHER tIDENTIFY BELOW)-e~mam k)R'c.m adI~..M~V R)cc 4=.UBMl AM~ATTACHMENTS O HER N@COMPUTER PRINTOUT CIVERIFICATION HE KLIST VERIFICATION REQUIREMENT TYPE OF CALCULATION NO REASON REMARKS APPROV EDIDATE UPERSEDES 0 PRELIMINARY g FINAL SUPERSEDED BY REV.NO.RFVISION DESCRIPTION CALCULATION BY DATE CHECKED DATE APPROVED D TE Hlzlc (M~WP SOS R4 0 Calculation Sheet Project Subject System Wa-r3 1 Prepared By: Checked By: gr~File No.Date Date)~-Ib-g Analysis No.Rev.No.~-ow-a--I l Sheet No.//yt Q4;LC BLAT-l~S 8tp 730TrERa(Y V~deK l Mm or-Ccc~~s f P Zmz~~s~~i ES At Lou3P'B~K~KSGE'~ptO 1005.00 l Calculation Sheet/Project a-4~P T7dd~ixz~c Date (a Checked By: JQ)g Date I+Syste Job No.otic~l/ceufs" File No.Analysis No.Rev.No.Sheet No.-n>-a~-Il~He Co~~<4M~~U~w pc~Pdgrm 5MQa/GOAL<i~oATlo4~a~oR~)(Z~l p 7)~l~~Pc)K'~i+Co~7 L I~CE TC cRQ~F 04s~~Ag~&4~w~(wM~~, d~T AHm~O~gP t d~.~QG~"rjaaS~~L<dt.A~DWZ u3~w&~I Rvlc=-u 8-nJ'to Ncaa tw(~tA-H4w~L.~u3jw P WP 4 Y'g tS~-5owc-L REMA<~KSS CoWSGZUATl5fA ~At OA~W(PAt~BQ(L-i~A~lpJr'CCEL~- AmnAs.~he'u~~/44 awe%~u)i~~-W t oIQWAR~W tM~E REQQLRE~gRC At-Mu3At50, C+GQC.L'cP5 l od~ULwlWc>~~S~Xod~~~~~4/ALVB~~kt>~.g.~dEs Pros Dl5E TR~A~MW&~~E~~B~~it~d~~~Un lmarJS.~pe-K~Qt~rJ4~Zc Ga~YOU~LOC.A.~w j O'Dd c~~was AL t CAS~SWz.S~e~a Qog.Mr L Cod'D (~o<5 AS i&'po'SKAG, Eg ME'J+C ~w!Calculation Sheet'project td)QP-Z Subject t'6~i.a--~-r.JI~~~Q~Cent3-Checked By:~,~\""I Ii/sr"")~-)s-~Syst m I j Job No.'jSoLmma3'4aM~C,Fp~CSp File No, Analysis No.Rev.No.QQ 7-9.-I(0 Sheet No.Ki~~.rI LM)4~AAzo~~Mt+.~WE.C'RtS, t-Y t I WFR'P'M AN~"BQTTPK-'P4"(V A,i-ttS Are M MS I)5 f R, EfF~-v+-7)WW4e~ap A~&W r!~~S,.)(~C., ,I r,.I rf'P8 I-rl PY<A~t.C~DR.a Jr.-CAI C QL-amber~P~l t-I-'f fYf-~WC<<V af JC, fbi F~~-Z 72-3W~P(2-Z 7235,WM~>eA K,DI a.Il WSOI Va~~+V rC Ma P<<~~ON<<'fJy~ff, II PBZPOA~)F I r AV704 a7=M CY'D(4~~~;;.GRAN>"-A~a 130'T..rl~R Y,.t~fJ~T=sR, C5P-'fI-3I4I5,Co ~'q~IJr r EF-'V-3I-t ~4Af~7",o(,F, 4I+<pc/IQQ)<<c<+FQeV-C'r 5~WV IC E:-S'.%)WA~A~a>it w Ace.~~W~od'S iaIJ H.G OP'F I~W E~7~j F l EST'~t-T~V IJ~tC (,Oa4dci LOSS~~~G nW MaW l~~~L,)IJZ 6~gc9evzsusW>~tc~~ vw=%~=re'Psc.Wcft-~~~klo.f~-octo-+3~rf~w S-ZII-BZ AY~'DYIJIIMIC hA'0~mt OSS%68T cd 12'-)5o~EmM.ec t'A~Qt=-.u)vH Dt z~ett=r 6 DrJV~~HWPl-PHD)LK ELF~bA&S~~.r 1000 00
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