ML20116H457
| ML20116H457 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/27/1995 |
| From: | Higgins P NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20116H438 | List: |
| References | |
| 89-078-1206M2, 89-078-1206M2-R00, 89-78-1206M2, 89-78-1206M2-R, NUDOCS 9608120095 | |
| Download: ML20116H457 (10) | |
Text
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NORTHEAST NUCLEAR ENERGY COMPANY susster Bonnet Pressure of the Containment
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1ndeoendent Review of CCN-2 to 89-078-873ES rev. 0) g u, go, SHEER No.
1 or _ g QA Category 1 Calculation: 89-078-1206M2 rev. 0
Title:
Millstone Unit nc 2 Bonnet Pressure of Containment Sump Recirculation Valves (2-CS-16.lA/B) t l
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Date:
Phill W Higgins
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Method of Review:
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NORTHEAST NUCLEAR ENERGY COMPANY Bonnet Pressure of the Containment my
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Sheer No.
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Purpose This calculation detennines the the required thrust to open the sump recirculation valves (2-CS-16.lA/B) based upon expected design basis accident conditions seen by the valves. The calculation provides an independent review of the referenced cale using the EPRI Performance Prediction Program Methodology for evaluating Parallel disc gate valve (EPRI TR-103244) 1 II.
Results Four scerious were reviewed for the valve with most limiting conditions ("CS-16. lA). The four cases were: 1) pre-accident conditions; 2)large break loca, 44 minutes into the accident; 3)small break loca 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> into the accident w/presssurized bonnet; 1
4)small break loca 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> into accident w/ bonnet pressure equal to down stream piping, t
i Using the " double drag" method which applies forces to both discs on the seat ring, the valves are able to open using design basis limits.
III.
References (1) Crane Technical Paper # 410 (2) A. Nusco dwg 25203-26015 sh.
(3) EPRI TR-103244, "EPRI Performance Prediction Program" j
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I IV.
Conditions & Assumptions See section 1.0, Purpose s
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,,,,,,3 Bonnct Pressure of the Containment sun ter Sump Recirculation Valves ( 2-CS-16.1 A/B) en,c>, sy 31, indeoendent Review of CCN-2 to 89-078-873ES rev. 0) m, yo,
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3 or 8 i
V.
Method 1.
The sealing force is determined using EPRI PPP guideline for A/D Double Disc valve and info from the as-left static test.
This sealing force is compared to force required for the valve to make the valve leak tight.
2.
The force required to open the valves during: 1) pre-accident conditions; 2)large break loca, 44 minutes into the accident; 31small break loca bonnet pressurization; 4)small break loca with bonnet pressure equalized to the downstream pressure.
i l
VI.
ANALYSIS VI.1 Determine the Sealing Force i,
step 1: Determine Disk Assembly and Stem Weight Fw.= 0 lbf
... net needed (included in packing / running load) step 2: Determine Packing Friction Stem Thrust I
Fpack = 4634 lbf packing load from cs-16.1A is bounding and used for both valves (see memo MOV-95-391, dated 7/27/95) step 3: Determine Piston Effect Stem Thrust Dstem := 2.25 in P := 37-psi Fp : P. "
Fp = 147 lbf 4
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step 4: Determine Torque Reactic... ractor B2 := 24.021.in
... seat ring OD B3 = 23.387 in
.... seat ring ID Rt = 0.5 B2 + B3 2
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Rt = 0.988 A i
FS :=0.0226 A pt := 0.54 f FSI N *I %
TRF = 0.988 l
step 5: Determine Actual sealing Force f
2
. B2 + B3 i
2 Adp :=
Adp = 441 in 4
Rstatic = 29225 lbf
... latest as-left static test TT 5
&close.= 0 psi
... assumed for static test clesure i
Ra := 0.5 Rstatic + 0.6 Adp &close Ra = 14613 lbf Contact Force vs. DP Force 2
Acontact = 23.606 in Acontact.=
4 Ra Pcontact :=
Peontact = 619 psi Acontact Contact stress required for leak tightness is 4000 psi, thus valve is not considered leak tight.
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se.ner Bonnat Prnssura Of th7 Containm7nt er
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Sump Recirculation Valves ( 2-CS-16.1 A/B) cao. av m,
l undeoendent Review of CCN-2 to 09-078-873ES rev. 0) cA1.c. No.
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ssEEr No.
5 or 8
step 6: Determine Differential Pressure stem Thrust (Fdp)
Case 1: Large Break Loca (Time = 0 minutes)
Pbonnet := 37 psi Pdnstream := 37 psi Pupstream :=2 psi APupstrearn :Pbonnet-Pupstream APdnstream :: Pbonnet - Pdnstream Fbn :: 1
...bernoulli force correction factor (assumed negligible) 1 Fdp_ upstream : Adp APupstream ps Fbn Fdp_ upstream = 8341 lbf Fdp_dnstream := Adp APdnstream ps Fbn Fdp_dnstream = 0 lbf i
Fdp = Fdp_ upstream + Fdp_dnstream Fdp = 8341 lbf step 7:
Determine Required Thrust for opening the Valve (Fr) l Fr : Fw + Fpack + Fp + Fdp
...where Fw = 0 !bf
... included.in packing load Fpack =4634 lbf Fp = 147 lbf Fdp = 8341 lbf Fr = 13286 lbf Tlimit = 18025 lbf Thus, satisfactory l
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l step 6: Determine Differential Pressure stem Thrust (Fdp) case 2: Large Break Loca (Time = 44 minutes) l Pbonnet := 37 psi 1
Pdnstream := 20 psi Pupstream := 15 psi i
APupstream :Pbonnet-Pupstream APdnstream :: Pbonnet - Pdnstream i
Fbn::1
.'..bernoulli force correction factor (assumed negligible)
Fdp_ upstream ::Adp APupstream s Fbn Fdp_ upstream =5243 lbf Fdp_dnstream := Adpfdnstream s Fbn Fdp_dnstream = 4051 lbf Fdp = Fdp_ upstream + Fdp_dnstream Fdp = 9294 lbf step 7: Determine Required Thrust for opening the Valve (Fr)
Fr Fw+ Fpack + Fp + Fdp TRF i
...where Fw = 0 lbf
... included in packing load Fpack =4634 lbf Fp = 147 lbf Fdp = 9294 lbf Fr = 14251 !bf Tlimit := 18025 lbf Thus, Satisf aetory 4
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NORTHEAST NUCLEAR ENERGY COMPANY Bonnet Pressure of the Containment my
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nov.
SHEER No.
1 or 9
i step 6: Determine Differential Pressure stem Thrust (Fdp) s case 3: Small Break Loca (Time = 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, bonnet pressurized \\
j Pbonnet := 37 psi Pdastream := 20 psi r
Pupstream := 10 psi APupstream : Pbonnet - Pupstream APdnstream :Pbonnet-Pdnstream Fbn :: 1
...bernoulli force correction factor (assumed negligible)
Fdp_ upstream ::Adp APupstream ps Fbn Fdp_ upstream =6434 lbf Fdp_dnstream ~: Adp APdnstream ps Fbn Fdp_dnstream = 4051 lbf Fdp :Fdp_ upstream + Fdp_dnstream Fdp = 10485 lbf step 7: Determine Required Thrust for opening the Valve (Fr)
Fr := Fw + Fpack + Fp + Fdp TRF
...where Fw = 0 lbf
... included in packing load Fpack =4634 Ibf Fp = 147 Ibf Fdp = 10485 Ibf Fr =15457 lbf Tlimit '= 18025 lbf Thus, satisfactory e
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Bonnet Pressure of the Containment er
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l Step 6 Determine Differential Pressure Stem Thrust (Fdp) j l
case 4: Small Break Loca (Time = 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, bonnet pressure = downstream pressure) l Pbonnet := 20 psi Pdnstream := 20-psi Pupstream := 10 psi l
/fupstream := Pbonnet - Pupstream APdnstream :=Pbonnet - Pdnstream i
t Fbn::1
...bernoulli force correction factor (assumed negligible)
Fdp_ upstream := Adp APupstream ps Fbn Fdp_ upstream = 2383 Ibf Fdp_dnstream := Adp APdnstream s Fbn Fdp_dnstream =0 lbf Fdp := Fdp_ upstream + Fdp_dnstream Fdp = 2383 Ibf l
l Step 7: Determine Required Thrust for opening the Valve (Fr) 1 l
l Fr _ Fw + Fpack + Fp + Fdp TRF l
...where Fw = 0 lbf
... included in packing load Fpack =4634 lbf f
Fp = 147 lbf Fdp =2383 lbf 4
Fr =7254 lbf Tlimit := 18025 lbf Thus, Satisfactory 4
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$ 5 I
l MP-2 Portions from SP 21136, Rev. 9 i
Procedure to monitor and fill containment sump piping to prevent l
pressure locking of 2-CS-16.1 A/B i
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SP 21136'
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Page 3 Rev. 9 t
TABLE OF CONTENTS PROCEDURE SECTION SECTION TITLE PAGE NO.
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7.0 Tdha Med; T;#=;;fVdc; 2 SI 312
("r;. F:r 21125 IC) 42--
p 7.14 Full Stroke Testing and Stroke Tune Testing of Valve 2-CS-13.1B (Eng. Form 21136-1G) 43 7.15 Full Stroke Testing (OPEN) the "A" LPSI Pump Minimum Flow Recirculation Line Check Valve 2-SI-448 (Eng. Form 21136-1H) 45 7.16 Full Stroke and Stroke Tune Testing of Valves 2-SI-615,2-SI-625, and Stroke Testing of 2-SI-400 (Eng. Form 21136-1H) 45 7.17 Full Stroke Testing (OPEN) the "B" LPSI Pump Minimum Flow Recirculation Line Check Valve 2-SI-451 (Eng. Form 21136-1D) 48 7.18 Full Stroke and Stroke Time Testing ofValves 2-SI-635 and 2-SI-645 (Eng. Form 21136-1D).
49 4
7.19
'F 11 Sinh: T:: ting 'OPEM the "S' Cen9 cr!
Spre.; ";;p "L;hr.;;; Chuk V:.h; 2 CS 2A sd x
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Part Stroke Testing (OPEN) the Containment h'
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Sump Outlet Check Valve 2-CS-15A a iP%@c de
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(Eng. Form 21136-1E) 5" 53 7.21 Part Stroke Testing (OPEN) the Containment i
Sump Outlet Check Valve 2-CS-15B eMt(hin CTMT %
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(Eng. Form 21136-1E) 5"*m P1't$ 6 55 p
7.22 Full Stroke and Stroke Tune Testing of Valve 2-CS-4.1A (Eng. Form 21136-1E) 57 7.23 Full Stroke and Stroke Time Testing of Valve 2-CS-16.1A (Eng. Fonn 21136-1E) 59 7.24 Td! S:nh: T:f ; (OPD') the """ Cer" rt g
Sp=y P:=p Ob:hr;; Ch::kYe.; 2 CS 2I;esa s
S: "P." C::S=:: Spry P:=p MinInt: Fkr P.::in ! den Lin: Chuk VO;; ?. - CS SIl
'Eng.Fr a 21120 W 61 4-4 e