ML20085M566
| ML20085M566 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 06/22/1995 |
| From: | Pelletier J VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| BVY-95-69, GL-89-10, NUDOCS 9506290254 | |
| Download: ML20085M566 (35) | |
Text
_.
YERMONT YANKEE NUCLEAR POWER CORPORATION e
Ferry Road, Brattleboro, VT 05301-7002 REPLY TO ENGINEERING OFFICE 580 MAIN STREET -
BoLToN, MA 01740 (508) 779 4 711 J"m 'u.1995 1W 0560
' U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555
References:
(a)
License No. DPR-28 (Docket No. 50-271)
(b)
Letter, USNRC to All Licensees, Generic Letter 89-10, (NW 89-144), dated June 28, 1989.
(c)
Letter, USNRC to All Licensees, Generic Letter 89-10, Supplement 6, (NW 94-51),
dated March 8,1994.
(d)
Letter, WNPC to USNRC, (BW 94-96), dated September 23,1994.
(e)
Letter, USNRC to WNPC, (NW 94-191), dated November 16,1994.
(f)
Letter, WNPC to USNRC, (BW 95-33), dated March 15,1995.
I (g)
Letter, USNRC to WNPC, (NW 95-33), dated March 17,1995.
(h)
Letter, USNRC to WNPC, inspection Report No. 50-271/95-03, (NW 95-59), dated l
May 4,1995, t
Subject:
Generic Letter 89-10: Revision of Schedule Commitments in Generic Letter 89-10 [ Reference (b)] and its supplements, the NRC requested l'censees to establish a program to ensure the operability of all safety-related, motor-operated valves (MOVs) under design basis conditions. The Generic Letter also recommended that each licensee complete all design basis reviews, analyses, verifications, tests and inspections within 5 years or three refueling outages from the date of the Generic Letter. In Reference (d), Vermont Yankee committed to complete our Generic Letter 89-10 MOV Program by May 1995, following the Spring 1995 Refueling Outage.
Vermont Yankee hereby submits its justification to extend the completion date to December 1,1995.
'l Information to support this revised completion date is provided in Attachment A to this letter and i
the associated Figures and Tables. This information is provided in accordance with Generic Letter 89-l 10, Supplement 6 [ Reference (c)]. In summary, the revised completion date will provide a sufficient period of time for finalization of the required supporting documentation, including collection of industry data. The required design basis reviews, static and dynamic testing, actuator inspections and l
refurbishments, modifications for margin improvements and pressure locking, and procedure l
preparation or revisions have been completed consistent with our previous commitments.
1 Vermont Yankee considers this revised schedule acceptable as functionality has been confirmed for the MOVs within the scope of our Generic Letter 8910 MOV Program through the combination of static and dynamic testing performed to date.
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VERMONT YANKEE NUCLEAR POWER CORPORAlION U.S. Nuclear Regulatory Commission June 22,1995 Page 2 7
i We trust that this information is satisfactory; however, should you have any questions or desire any additional information, please do not hesitate to contact us.
Sincerely, i
VERMONTYANKEE NUCLEAR POWER CORPORATION O
, vnJ James P, Pelletier Vice President - Engineering Attachments cc: (with Attachments)
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USNRC Regional Administrator, Region i USNRC Resident inspector, WNPS USNRC Project Manager, WNPS C
STATE OF VERMONT
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Then personally appeared before me, James P. Pelletier, who, being duly sworn, did state that he is Vice President-Engineering, of Vermont Yankee Nuclear Power Corporation, that he is duly authorized to execute and file the foregoing document in the.same and on the behalf of Vermont Yankee Nuclear Power Corporation, and that the statements therein are true to the best of his knowledge and belief.
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. VERMONT YANKEE NUCLEAR POWER CORPORATION ATTACHMENT A STATUS OF THE VERMONT YANKEE GL 89-10 MOV PROGRAM
1.0 INTRODUCTION
This Attachment provides the status of the Vermont Yankee Generic Letter (GL) 8910 MOV
.i Program as of May 15,1995. A summary of major GL 89-10 activities is presented in Table 1.
Vermont Yankee has a total of 85 motor-operated valves (MOVs) in the GL 89-10 Program.
f Vermont Yankee has completed design basis reviews, actuator inspections and refurbishments, and performed static testing to set up switches for all program MOVs. Twenty-five dynamic l
tests are complete for 24 program valves. Vermont Yankee has developed MOV program
?
documents, established a tracking and trending program, improved maintenance practices and post maintenance testing guidance, and implemented training for the MOV program.
i Additionally, Vermont Yankee has completed its review for susceptibility to pressure locking and i
implemented necessary modifications. Preliminary evaluations for susceptibility to thermal i
binding and liquid entrapment are complete, with no required modifications identified. Vermont Yankee has also implemented a number of modifications to improve MOV margins and testability in the field. These modifications include actuator replacements, disk modifications, installation of Teledyne Smart Stems and Oulck Stem Sensors, and installation of EGS connectors (quick disconnects) to facilitate test equipment installation and periodic actuator i
change outs, i
Vermont Yankee will complete the evaluation of the dynamic test data for recently completed tests, complete justification of design basis assumptions, and establish a periodic verification plan to provide for GL 89-10 closure.
l' The following Figures and Tables are provided with this
Attachment:
l Table 1 Summary of GL 89-10 Activities i
Table 2 GL 89-10 Valve information Table 3 Low Margin MOVs l
Table 4 MOVs Practical To Dynamic Test l
Table 5 Close Dynamic Test Results j
Table 6 Open Dynamic Test Results Figure 1 Close Margin Components l
Figure 2 Open Margin Components 2.0 DESIGN BASIS REVIEWS l
l Design basis reviews have been completed for all program MOVs. These reviews were l
performed in three parts; the System Level Design Basis Reviews, the Electrical Design Basis l
Reviews, and the Component Level Design Basis Reviews. Key results from the design basis reviews are presented in Table 2.
The System Level Design Basis Reviews determine the functional requirements for each MOV i
during each mode of system operation. This includes differential pressure, line pressure, flow Page A-1
VERMONT YANKEE NUCLEAR POWER CORI' ORATION rate, fluid type and temperature, environmental condition, required stroke time, and orientation.
The modes of system operation are those which occur during normal operations, design basis transients, and design basis accidents.
The Electrical Design Basis Reviews confirm that the electrical distribution system transfers sufficient power to the motor actuator during both normal operations and design basis transients and accidents. The reviews consider effects of over voltage and under voltage system conditions as well as the potential decrease of motor torque due to increased temperature. For each MOV, the minimum and maximum motor output torque and the nominal motor speed are determined. The control circuit, thermal overload sizing and breaker settings are also reviewed.
The Component Level Design Basis Reviews determine and confirm that the capabilities and limits of the components that make up each MOV are acceptable and establish the appropriate switch settings to ensure that the MOV will operate under design basis conditions for the life of the plant. For each MOV, the following relationships are reviewed:
1)
Actuator output capability versus minimum required stem thrust.
2)
Maximum developed thrust / torque versus actuator and valve thrust / torque capabilities.
3)
Actuator stall thrust / torque versus actuator and valve survivable thrust / torque.
4)
Design basis dynamic stroke times versus estimated dynamic stroke times.
Evaluation of the effect of degraded voltage and loading on DC MOV stroke times will be completed for GL 89-10 closure.
2.1 Valve Factors:
In the absence of valve specific differential pressure testing data, the following valve factors are used:
Gate Valves:
Walworth 0.5 Parallel Disc 0.5 Other Gate Valves:
0.6 Globe Valves:
1.1 The dynamic testing performed by Vermont Yankee supports the use of these valve factors. Justification of the valve factor for each program MOV will be completed for GL 89-10 closure. The justification will consider the data available, its applicability and quality, the safety significance of the MOV, safety function, and available margin in establishing acceptability. The following precedence of data will be used:
1)
Use of test data from an identical Vermont Yankee valve.
Page A-2
VERMONT YAN%Et NUCLEAR POWER CORI' ORATION 2)
Use of test data from Vermont Yankee valves of similar design characteristics.
Specific justif! cation will be provided for simliarity.-
3)
Application of general Vermont Yankee test results for similar manufacturer and valve types.
4)
Use of test data from en identical or similar valve from another plant.
5)
Use of EPRI test data from an identical or similar valve, or use of the EPRI program to predict valve performance.
2.2 Stem to Stem Nut Coefficient of Friction:
A value of 0.15 is used for the stem to stem nut coefficient of friction. This value is increased by 0.005 for each outage between lubrications to account for potential degradation in lubrication properties. Starting with the recent Spring 1995 Refueling Outage, Vermont Yankee collects as-found thrust and torque data when diagnostically testing MOVs to validate the use of a coefficient of friction of 0.15. No degradations over the outage intervals above that assumed have been detected. Vermont Yankee has noted reduction in the coefficient of friction between lubrication intervals, which may be due to the lubricant reaching ideal film thickness over time. Vermont Yankee has recently switched lubricants (EP-0 to EP-1) in order to provide more consistent performance.
Based on both in-plant and industry testing data to date, Vermont Yankee believes the use of the 0.15 coefficient of friction is conservative. Vermont Yankee believes that the performance of the new lubricant will support use cf the 0.15 and provide better aging performance. Additionalconservatismisaddedbyaccountingforpotentialdegradation in lubrication properties.
The Vermont Yankee tracking and trending program specifically addresses stem to stem nut friction for evaluation of lubricant performance, aging, and relubrication intervals. Vermont Yankee will incorporate the results of its recent diagnostic testing to its current analysis and provide additional justification for its use of a 0.15 coefficient of friction for GL 89-10 closure.
2.3 Rate of Loading:
Vermont Yankee utilizes a value of 10% to account for rate of loading. _ This is not intended to be a bounding value for rate of loading. Rather, when taken in concert with the overall setpoint methodology, the 10% provides assurance that the setpoints are acceptable. Determination of rate of loading from the test data assumes that the variation between the static and dynamic control switch trip (CST) observed is solely due to rate of loading. In actuality, these variations are due to the combination of torque switch repeatability, equipment inaccuracles, lubrication changes, and rate of loading. Once again, Vermont Yankee willincorporate the results of dynamic testing into its current analysis and provide additional justification for its use of 10% to account -
for rate of loading uncertainties for GL 89-10 closure.
Page A-3
-~
r- _
h VERMONT YANKEE NUCLEAR POWER CORPORATION 2.4 Actuator Output Capability:
Actuator output capability is determined consistent with Limitorque guidance. Motor rated starting torque is used in conjunction with an application factor as recommended
' by Limitorque. Pullout efficiencies are _used for opening thrust determinations at reduced voltage for AC motors and opening and closing thrust determinations at reduced voltage for DC motors. Running efficiencies are used for the running thrust determinations and closing thrust determination at reduced voltage for AC motors.
Vermont Yankee will continue to monitor industry progress on actuator efficiency issues.
2.5 Additional 11 ems:
Packing loads are determined consistent with Limitorque guidance, approximately 1000
' lbs of packing load per inch of stem diameter. Based on Vermont Yankee static and dynamic testing to date, this value has proven to be acceptable.
Vermont Yankee does not include stem rejection forces in determining the regulred opening thrusts for gate valves. This results in additional conservatism in determining the required opening thrusts. In addition for globe valves, Vermont Yankee assumes flow under the seat for closing and flow over for opening. This results in a conservative determination of required thrust.
Vermont Yankee utilizes up to 140% of the published actuator thrust rating for selected actuators as endorsed by Limitorque. The existing published torque ratings are utilized. Vermont Yankee has established weak links based on the vendor calculations i
for each MOV. In addition, the motor capability establishes the upper band for valve unwedging and torque switch setting.
3.0 PRESSURE LOCKING / THERMAL BINDING The evaluation for susceptibility to pressure locking is complete. Susceptibility to thermal binding and liquid entrapment are still under review. A preliminary review has been completed which determined that no modifications were anticipated which required implementation during the recently completed Spring 1995 Refueling Outage.
The following actions have been completed by Vermont Yankee in response to these issues:
1)
Modifications have been performed on all four MOVs deemed susceptible to pressure locking due to rapid depressurization, the two normally closed Low Pressure Core Spray injection valves and the HPCI and RCIC pump discharge valves. In addition, the two normally open Low Pressure Core Spray injection valves were modified. These valves are normally open, but may be closed during operation, and thereby be susceptible to pressure locking.
2)
Insulation has been added to five MOVs identified as susceptible to liquid entrapment.
3)
A procedure change has been completed for the normally closed HPCI steam supply valve deemed susceptible to thermal binding.
Page A-4
VERMONT YANKEE NUCLEAR POWER CORPORATION I
4)
A procedure change is in progress for the two normally open LPCI injection gate valves Identified as potentially susceptible to pressure locking during surveillance testing.
Upon completion of the final analysis, Vermont Yankee will identify any additional necessary corrective actions (l. e., procedural changes or installation of additional insulation to limit temperature rise). This analysis will be completed for GL 89-10 closure.
4.0 STATIC TESTING l
Static testing has been completed for all 85 MOVs in the GL 89-10 Program. The results of static testing are presented as a summary of as-left margins in Tables 2 and 3. Table 2 presents the information for all GL 89-10 MOVs. Table 3 focuses on low margin MOVs. Low margin MOVs are defined as those which have less than 50% margin in their safety function direction.
All MOVs were set up using the best available information at the time the static test was completed. Operability assessments have been completed for MOVs identified to be currently set outside of their windows. The setpoints will be restored to their windows at their next regularly scheduled static test (within 2 refueling outages). The schedule for corrective actions was established by Vermont Yankee considering whether the setting was low or high, the magnitude by which the setting was outside the window, potential for failure, and safety significance. Additionally, Vermont Yankee is reviewing the static test results for all Generic Letter 89-10 MOVs to support closure activities. Vermont Yankee also collects torque data, where possible, to assist in evaluation of the actuator.
5.0 DYNAMIC TESTING Dynamic testing has been completed for 24 MOVs in the GL 89-10 Program. Evaluation of the tests performed prior to the Spring 1995 Refueling Outage is complete. Preliminary evaluation of the Spring 1995 Refueling Outage tests is complete. Based on testing to date, all of the MOVs are capable of fulfilling their design basis function. Application of the test data to similar MOVs is in progress and will be completed for program closure.
5.1 Determination of Test Population:
The dynamic testing program was intended to provide a representative sample of the population of MOVs within the scope of the GL 89-10 Program, including diversity of valve types, operator sizes, and design basis conditions; and to provide information on parallel train similarities. A total of 31 MOVs have been identified as testable within the total population of 85 GL 89-10 MOVs. Twenty three MOVs within the testable valve population have been dynamically tested. One valve has been dynamically tested twice. Table 4 presents the safety functions, margins, and risk significance for the testable valves.
Vermont Yankee utilized industry guidance (BWROG) in establishing the valve population which could be tested. Vermont Yankee ain established an additional criterion which excluded 8 MOVs with restricting orifices between the valve and the upstream pressure tap. This is based on potential unreliability of the differential Page A-5 g
r VERMONT YANKEE NUCLEAR POWER CORPORATION pressure data due to the pressure drop across the orifice. One of these 8 MOVs has been dynamically tested to validate this criterion. Engineering evaluation of the test results will be completed for GL 89-10 closure. These MOVs have also been identified as low risk significance MOVs. This brings the total dynamically tested valve population to 24 MOVs.
Of the 31 testable MOVs, Vermont Yankee has chosen to presently address 8 MOVs through grouping. The justifications for these valves will address the similarity with the tested valves and will consider the risk significance, safety function, and margin.
Vermont Yankee is also evaluating testing of the remaining 8 MOVs in subsequent i
refueling outages in order to gain additional test information and to identify any MOV specific performance issues.
5.2 Dynamic Test Results:
A summary of the dynamic test results is provided in Tables 5 and 6. These results are based on preliminary evaluation of the test data.
Vermont Yankee utilizes linear extrapolation of test results to design basis conditions.
Justification of the linear extrapolation method will be completed for closure. Vermont Yankee also collects both torque and thrust for dynamic tests.
To date, performance of all MOVs dynamically tested has been as expected with the exception of LPCI Injection Valves V10-27A and V10-27B. These MOVs exhibited progressively higher thrust losses from test to test. Corrective maintenance was performed, the valves were then retested dynamically and met their acceptance criteria. The problems encountered with these valves are unique to the V10-27A and V10-278 valve design.
Overall, the dynamic testing performed has validated the overall switch setting methodology for the tested MOVs. The detailed engineering evaluation of the dynamic test data will be completed for GL 89-10 closure.
6.0 MAINTENANCE AND MODIFICATIONS FOR MOV PERFORMANCE IMPROVEMENT Vermont Yankee has an aggressive actuator maintenance program. Spare actuators exist for a majority of the Vermont Yankee GL 89-10 population. The actuators are periodically replaced, then refurbished during non-outage periods to maintain the actuators in the best condition possible. The present replacement periodicities are nominally every four and one-half (4-1/2) years for MOVs located within the primary containment or steam tunnel and nominally every nine (9) years for MOVs located outside of the primary containment and steam tunnel.
)
When valves are opened for maintenance, critical dimensions are recorded, and the disc, seat, and guide edges are rounded or chamfered to reduce s!! ding friction.
Vermont Yankee has recently changed the grease used for stem lubrication due to-an unwanted decrease in stem factor over the lubrication period, postulated to be due to the g
lubricant reaching ideal film thickness over time. The lubrication periodicities are nominally every one and one-half (1 1/2) years for MOVs located within the primary conta!nment or steam Page A-6
VERMONT YANKEL NUCLEAR l'OWER CORPORATION tunnel and nominally every four and one-half (4-1/2) years for MOVs located outside of the primary containment and steam tunnel. The new grease should provide more consistent actuator performance over time.
Vermont Yankee has implemented modifications for all of its GL 89-10 MOVs ranging from simple control circuit modifications to complete actuator replacements. These modifications include: 1) installation of 4 rotor limit switches for improved control circuit configuration; 2) modification of control circuits to standardize wiring; 3) disc modifications for pressure locking;
- 4) installation of EGS connectors to facilitate testing: 5) actuator changes; 6) motor changes, and 7) installation of Teledyne Smart Stems and Quick Stem Sensors to suppor1 testing.
7.0 TRACKING AND TRENDING The Vermont Yankee tracking and trending program is defined in the Vermont Yankee Motor Operated Valve Program Plan. The program addresses all MOV failures, malfunctions, testing, inspections, surveillance, and alterations. Required repairs and corrective actions are also monitored. Baselining of the tracking and trending program is planned to occur concurrent with GL 89-10 Program closure. One of the purposes of the tracking and trending program is to evaluate the data collected for periodic verification. The goal is to identify age-related degradations, characterize the rate of age-related degradation (i. e., project potential failure),
and provide feedback to the periodic verification plan regarding activities and scheduling.
Vermont Yankee's commitment to establish a tracking and trending program to satisfy the recommendations of GL 89-10 has been met.
8.0 PERIODIC VERIFICATION Assurance of MOV capability will be established through a combination of static and dynamic diagnostic testing, periodic maintenance activities, and actuator refurbishments. The required activities and periodicities for each MOV will be established based on the MOVs safety significance, margin, operating conditions (i. e. environmental and fluid conditions), and the results of the tracking and trending program. Periodic verification will document that the current MOV set up will fulfill its design basis condition with adequate margin to address any potential degradation over the next periodic verification interval. The data collected is then fed to the tracking and trending program which validates that the margins assigned are acceptable.
As previously discussed, the design basis reviews establish specific margin for lubrication degradation. No specific margin is included for other degradations, such as valve factor degradation due to disc or guide wear, or spring pack relaxation. The results of the Vermont Yankee dynamic testing show that values selected provide some inherent conservatism to account for these changes.
The periodic verification plan will be completed for GL 89-10 closure. The plan will provide guidance for specific periodic verification activities and periodicities. The bases for these activities will be included in the plan.
Page A-7 i
j
TABLE 1 VERMONT YANKEE -
SUMMARY
OF GL 89-10 ACTIVITIES STATIC TESTING (MOV SET UP)
DYNAMIC TESTING TOTAL COMPLETE TOTAL PRACTICAL
. TESTED 85 85 85 31 24*
- 25 Total tests were performed, one MOV was tested twice and one MOV considered not practical to test (due to data concerns) was tested.
DESIGN BASIS REVIEWS COMPLETE SYSTEM 85 ELECTRICAL 85 SMART STEM 11 THRUST 85 OR QSS I
COMPONENT 85 PRESSURE 6
LOCKING PRESSURE 85 LOCKING LIQUID 4
THERMAL In Progress
- BINDING
- This table does not include EQ modifications or spring pack change outs.
LIQUID in Progress
- ENTRAPMENT Major modifications refer to actuator and/or motor changes.
- Revisit of previous study.
ACTUATOR REFURB!SHMENTS TOTAL MOVS COMPLETED 85 85 INTERNAL INSPECTIONS INSPECTED NOTES 10 4 Supplement 3 valves LOW MARGIN MOVS inspected TOTAL
<50% MARGIN CLOSE 76 29 OPEN 61 10 Total close indicates those MOVs having a close safety function.
Total open indicates those MOVs having an open safety function.
i
TABLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER. SIZE. PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close Margins To DP DP Size Actuator Significance Function DP DP Flow Close Open Test Tested Valve ID Description ANCHOR / DARLING,150 8. DOUBLE Disk GATE VALVE V19-220 NORMAL FUEL POOL COOLING 8
SMB-00-7.5 Low Close 14.7 17.56 0
625 %
198 %
No No SUBSYSTEM ISOLATION VALVE V19-221 NORMAL FUEL POOL COOLING 8
SMB-00-5 Low Cloce 14.7 17.56 0
224 % 241 %
No No SUBSYSTEM ISOLATION VALVE ANCHOR / DARLING,300 # DOUBLE Disk GATE VALVE V10-26A RHR TO CONTAINMENT SPRAY 12 SMB-1-40 Medium Both 287.7 295.3 7000 50 %
124 %
No No ISOLATION VALVE V10-31 A RHR TO CONTAINMENT SPRAY 12 SMB-1-40 Medium Both 286.8 294.4 7000 50 %
127%
No No ISOLATION VALVE V10-31B. RHR TO CONTAINMENT SPRAY 12 SMB-1-40 Medium Both 280.4 287.1 7000 71 %
141 %
No -
No ISOLATION VALVE CCl,300 #, GLOBE VALVE V10-898 RHR HX SERVICE WATER OUTLET VALVE 12 SMB-00-25 High Both 128.6 318.2 2700 158 % 430 %
Yes Yes V10-89A RHR HX SERVICE WATER OUTLET VALVE 12 SMB-00-25 High Both 128.7 318.5 2700 92%
481 %
Yes Yes Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation.. Margins are determined based on as-left Settings (accounting for equipment error) in closing and limiting capability in opening.
- 2. Valves shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE S OF 12
TABLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER, SIZE, PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close Margins To DP DP Size Actuator Significance Function DP DP Flow Close Open Test Tested Valve ID Description CRANE-FLOWMATIC,150 #, GLOBE VALVE VG-22A CAD TO SBGT SYSTEM CONTAINMENT 1
SMB-000-2 Low Both -
44 44 20 scfm 3642 % 166567 %
No No ISOLATION VALVE VG-22B CAD TO SBGT SYSTEM CONTAINMENT 1
SMB-000-2 Low Both 27.5 27.5 20 scfm 155 % 412 %
No No ISOLATION VALVE DARLING,800 #. DOUBLE Disk GATE VALVE V10-18 RECIRC SUPPLY TO RHR PUMP SUCTION 20 SB-2-60 Medium Close 166.9 173.4 -
14500 24 %
46 %
No No INBD ISOLATION VALVE I
h Notes
- 1. Margins represent nyerall gross margin to the minimum thrust. The margins do n -
allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for e.pment error) in closing and limiting capability in opening.
s
- 2. Valves shown with negative margins have been evaluated to assess their cperability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 2 OF 12
4 TABLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER. SIZE, PRESSURE CLASS AND TYPE Practical Risk Safety Open Close Close Margins To DP DP.
Valve ID Description Size Actuator Significance Function DP DP Flow CloseOpen Test Tested DARLING,1500 #, DOUBLE Disk GATE VALVE V02-548 RX RECIRC PUMP DISCHARGE 4
SMB-000-5 Low Close 0
0 0
42%
1175 %
No No ISOLATION VALVE V02-54A RX RECIRC PUMP DISCHARGE 4
SMB 000-5 Low Close 0
0 0
93 %
618 %
No No ISOLATION VALVE V02 43B REACTOR RECIRC PUMP SUCTION 28 SB-2-60 Low N/A 43.1 0
0 231 %
566%
No No VALVE V02-S3A RX RECIRC PUMP DISCHARGE 28 SB-2-60 Low Close 6.5 7.6 6674 564 % 1666 %
No No ISOLATION VALVE V02-43A REACTOR RECIRC PUMP SUCTION 28 SB-2-60 Low N/A 43.1 0
0 238 %
971 %
No No VALVE V02-538 RX RECIRC PUMP DISCHARGE 28 SB-2-60 Low Close 6.5 7.6 6674 559 % 1280%
No No ISOLATION VALVE HANCOCK,1500 #, GLOBE VALVE V13-27 RCIC PUMP DISCHARGE MINIMUM FLOW 2
SMS-Oo-15 Low Both 1369.5 1381 SO 104 % 1577%
No No VALVE V13-132 RCIC PUMP DISCHARGE VALVE TO 2
SMB-00-5 High Both 1371.7 0
16 519 % 1854%
No No BAROMETRIC CONDENSER Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
2 Valves shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless othetwise identified.
PAGE 3 OF 12 i
TACLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER, SIZE, PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close Margins To DP DP Valve ID Description Size Actuator Significance Function DP DP Flow CloseOpen Test Tested '
MAsONEILAN,150 #, GLOBE VALVE V70-257B SFPC HX SERVICE WATER OUTLET 4
SMB-000-2 Low Both 88.7 91.1 700 211 % 409%
Yes Yes THROTTLING 1 SOLATION VALVE V70-257A SFPC HX SERVICE WATER OUTLET 4
SMB-000-2 Low Both 90.3 91.1 700 205 % 395 %
Yes Yes THROTTLING / ISOLATION VALVE POWELL,1500 #, FLEX WEDGE GATE VALVE V12-18 REACTOR WATER CLEANUP 4
SMB-0015 Medium Close 100 1166 2147 42 % 13237 %
No No CONTAmMENT ISOLATION VALVE V12-15 REACTOR WATER CLEANUP 4
SMB-00-10 Medium Close 1020 1166 2147 28%
125 %
No No CONTAINMENT ISOLATION VALVE ROCKWELL,600 #, Y PATTERN GLOBE VALVE V10-27B RHR TO RECIRCULATION L.OOP 24 SMB-4T-250 High Both 327.7 305.6 14500 16%
93%
Yes Yes ISOLATION VALVE V10-27A RHR TO REClRCULATION LOOP 24 SMB-4T-250 High Both 344.3 304.8 14200 3%
80%
Yes Yes ISOLATION VALVE Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
- 2. Valves shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 4 OF 12
q TABLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER, SIZE, PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close.
Margins
- To DP DP.
Size Actuator Significance Function DP DP Flow CloseOpen Test Tested Valve ID Description WALWORTH,150 # SOUD WEDGE GATE VALVE V70-117 PRIMARY CONTAINMENT RBCCW 8
SMB-00-5 Low Close 82.3 103.1 1250 82 %
35 %
Yes Yes RETURN VALVE f
U23-17 HPCI PUMP SUCTION VALVE FROM 14 SMB-0-15 Medium Both 31.2 31.7 4250 150 %
195%
No No CONDENSATE STORAGE TANK V70-20 SW SUPPLY VALVE TO TURBINE 20 SMB-1-40 Medium Close 117.16 139.0 23200 19%
32%
Yes Yes BUILDING COOLING LOADS V70-19A SW SUPPLY HEADER CROSEOONNECT 24 SMB-t-60 Medium Both 126.12 129.7 23200 35 %
26 %
Yes-Yes VALVE V70-19B SW SUPPLY HEADER CROSSCONNECT 24 SMB-1-60 Medium Both 126.04 130.4 23200 21 %
24%
Yes
.No VALVE Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error)in closing and limiting capability in opening.
- 2. Valves shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 5 OF 12
TABLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER. SIZE PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close Margins To DP DP Valve ID Description Size Actuator Significance Function DP DP Flow Close Open Test Tested WALWORTH. 300 #, sOUD WEDGE GATE VALVE V14-5B CORE SPRAY PUMP MINIMUM FLOW 3
SMB-000-5 Low Both 312 328 300 111 % 327 %
No No VALVE V14-5A CORE SPRAY PUMP MINIMUM FLOW 3
SMB-0Co-5 Low Both 312 328 300 96%
286 %
No No VALVE V10-16A RHR PUMP DISCHARGE MINI FLOW 4
SMB-00-10 High Both 295.3 299.9 350 194 % 479 %
No No RETURN TO SUPPRESSION POOL V10-57 RHR LOOP CROSSCONNECT TO 4
SMB-00-10 Low Close 297 403 910 219 % 495 %
Yes Yes RADWASTE ISOLATION VALVE V10-66 RHR LOOP CROSSCONNECT TO 4
SMB.000-5 Low Close 297 403 910 21 %
214 %
Yes Yes RADWASTE ISOLATION VALVE V10-168 RHR PUMP DISCHARGE MINI FLOW 4
SMB-00-10 High Both 295.1 302.1 350 76 %
389 %
No No RETURN TO SUPPRESSION POOL V13-18 CONDENSATE SUPPLY TO RCIC PUMP 6
SMBMS Medium Both 31.4 0
0 395 % 670 %
No No SUCTION VALVE V13-39 SUPP POOL SUPPLY TO RCIC PUMP 6
SMB4}o 5 Medium Both 16.3 0
0 668 % 925 %
No No-SUCT INBD ISOL VALVE V13-41 SUPP POOL SUPPLY TO RCIC PUMP 6
SMB-00-5 Medium Both 16.3 0
0 429 % 495 %
No No SUCT INBD ISOL VALVE Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degiadation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
- 2. Valves shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressurer (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 6 OF 12
m TA'ZLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER, SIZE, PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close Margins To DP DP Valve ID Description Size Actuator Significance Function DP DP Flow Close Open Test Tested V10-183 RHRSW TO RHR EMERGENCY FILL 10 SMB-0-25 Medium Open 348.7 0
0 2403 % 38 %
No No ISOLATION VALVE V10-184 RHRSW TO RHR EMERGENCY FILL 10 SMB-0-25 Medium Open 350 0
0 796%
27%
No No ISOLATION VALVE V10-39B RHR CONT SPRAY! SUPPRESSION POOL 12 SMB-0 40 High Both 295 306 14500 21 %
74 %
Yes No COOLING SUPPLY VALVE V10-268 RHR TO CONTAINMENT SPRAY 12 SMB-0-40 Medium Both 285.6 291.4 7000 33 %
92%
No No ISOLATION VALVE V14-78 CORE SPRAY PUMP SUCTION VALVE 12 SMB-0-15 Low Both 20 3.8 75 223 %
348 %
No No V10-39A RHR CONT SPRAY / SUPPRESSION POOL 12 SMB-0-40 High Both 295 307 14200
-10%
67 %
Yes Yes COOLING SUPPLY VALVE V14-7A CORE SPRAY PUMP SUCTION VALVE 12 SMB-0-15 Low Both 20 3.8 75 419 %
575%
No No V23-57 HPCI TORUS SUCTION CONTAINMENT 16 SMB-1-25 Medium Both 29 0
0 647 %
287 %
No No ISOL VALVE. OUTBOARD V23-58 HPCI TORUS SUCTION CONTAINMENT 16 SMB-t-25 Medium Both 29 0
0 701 % 418 %
No No ISOLATION VALVE V10-13A SUPPRESSION POOL RHR PUMP 20 SMB-2-25 Low Both 46 0
0 149 %
84 %
No No SUCTION VALVE Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error)in closing and limiting capability in opening.
- 2. Valves shown with negative margins haVe been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 7 OF 12
TAU [LE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER, SIZE, PRESSURE CLASS, AND TYPE Practical Risk '
Safety Open Close Close Marg. ins To DP DP Valve ID Description Size Actuator Significance Function DP DP Flow Close Open Test Tested -
V10-15B RECIRC LOOP SUPPLY VALVE TO RHR 20 SMB-2-25 Low Both 14 0
0 2249 % 423 %
No
. No PUMP SUCTION V10-15C RECIRC LOOP SUPPLY VALVE TO RHR 20 SMB-2-25 Low Both 14 0
0 420 %
123%
No No PUMP SUCTION V10-15D RECIRC LOOP SUPPLY VALVE TO RHR 20 SMB-2-25 Low Both 14 0
0 133 % 334 %
No No PUMP SUCTION V10-13B SUPPRESSION POOL RHR PUMP 20 SMB-2-25 Low Both 46 0
0 1153 % 89%
No No SUCTION VALVE V10-15A RECIRC LOOP SUPPLY VALVE TO RHR 20 SMB-2-25 Low Both 14 0
0 209 %
346 %
No No PUMP SUCTION V10-13D SUPPRESSION POOL RHR PUMP 20 SMB-2-25 Low Both 46 0
0 142 %
87%
No No SUCTION VALVE V10-13C SUPPRESSION POOL RHR PUMP 20 SMB-2-25 Low Both 46 0
0 655 %
60%
No No.
SUCTION VALVE Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
- 2. Valves shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 8 OF 12
. =
TABLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER, SIZE, PRESSURE CLASS. AND TYPE Practical Risk Safety Open Close Close Margins To DP DP Valve ID Description Size Actuator Significance Function DP DP Flow Close Open Test Tested WALWORTH,900 #, SOLID WEDGE GATE VALVE V13-15 RCIC STEAM SUPPLY INBOARD 3
SMB-000-5 Low Close 1112.4 1112 164000 Itmhr 9%
59%
No No L
CONTAINMENT ISOLATION VALVE V13-16 RCIC STEAM SUPPLY OUTBOARD 3
SMB-000-5 Low Closa 1112.4 1112 164000 Itmhr 39%
91 %
No No CONTAINMENT ISOLATION VALVE V02-77 MAIN STEAM LINE DRAIN CONTAIN ISO 3
SMB M S Low Close 1018.5 1080 o Itmhr 50%
145 %
No No VALVE VD2-74 MAIN STEAM LINE DRAIN CONTAIN ISO 3
SMB M 5 Low Close 1018.5 1080 o Itmhr
-5%
58 %
No No VALVE V13-20 RCIC PUMP DISCHARGE ISOLATION 4
SMB-00-10 Low Open 211.2 0
0 785 %
377 %
No No VALVE V13-21 RCIC INJECTION ISOLATION VALVE 4
SMB-00-10 High Open 211.2 O
o 586 % 457 %
No No V14-12A CORE SPRAY INJECTION ISOLATION 8
SB-2-60 High Both 304 403 4300 141 %
318 %
Yes No VALVE V14-11B CORE SPRAY INJECTION VALVE 8
SB-2-60 Medium Both 280 360 3000 125 %
316 %
Yes Yes V14-11 A CORE SPRAY INJECTION VALVE 8
SB-2-60 Medium Both 280 360 3000 169 % 337 %
Yes Yes 1
Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
- 2. Valves shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 9 OF 12
y TABLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER, SIZE, PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close Margins To DP DP Valve ID Description Size Actuator Significance Function DP DP Fiow CloseOpen---__ -
Test Tested V14-128 CORE SPRAY INJECTION ISOLATION 8
SB-2-60 High Both 304 389.5 4300 48 %
229 %
Yes Yes VALVE V23-14 HPCI STEAM SUPPLY VALVE 10 SMB-3-80 High Open 1112.4 1005 122000 lbm/hr 70%
67 %
Yes Yes V23-16 HPCI STEAM SUPPLY INBOARD 10 SMB-1-60 Low Both 1112.4 1112 173000 lbm/hr 35%
43%
No No CONTAINMENT ISOLATION VALVE V23-15 HPCI STEAM SUPPLY OUTBOARD 10 SMB-160 Low Both 1112.4 1112 173000 Itmhr 16%
25 %
No No CONTAINMENT ISOLATION VALVE V23-20 HPCI PUMP DISCHARGE VALVE 14 SMB-4T-200 Low Open 1236.6 0
0 1148 % 37 %
Yes Yes V23-19 HPCI DISCHARGE TO FEEDWATER 14
' SMB-4-200 High Open 1214 1235 3800
-36%
36 %
No No ISOLATION VALVE V10-17 RECIRC SUPPLY TO RHR PUMP SUCT 20 SMB-4-100 Medium Close 122.8 181.9 14500 10%
142%
No No OUTBD ISOLATION VALVE V10-25A RHR TO RECIRCULATION LOOP 24 SB-3-100 Low Both 344.2 0
0 2916 %
6%
Yes Yes ISOLATION VALVE V10-258 RHR TO RECIRCULATION LOOP 24 SB-3-100 Low Both 289.8 0
0 194 %
12%
Yes Yes ISOLATION VALVE Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
l
- 2. Valves shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 10 OF 12
TA[i'LE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER, SIZE. PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close Margins To DP DP.
Valve ID Description Size Actuator Significance Function DP DP Flow Close Open Test Tested WALWORTH.300 #, GLOBE VALVE U10-38A SUPPRESSION CHAMBER RHR SPRAY 4
SMB M7.5 Low Both 295 9 298.1 350 153 %
298 %
Yes No RING SUPPLY VALVE V10-38B SUPPRESSION CHAMBER RHR SPRAY 4
SMB-00-7.5 Low Bcth 295.8 297.4 350 144 % 468 %
Yes No RING SUPPLY VALVE V14-26A CORE SPRAY PUMP TEST LINE 8
SMB-1-25 Low Close 334 343 4300 45 %
106%
Yes Yes ISOLATION VALVE V14-26B CORE SPRAY PUMP TEST LINE 8
SMB-1-25 Low Close 334 343 4300 56%
108%
Yes Yes ISOLATION VALVE V10 348 RHR SUPPRESSION POOL COOLING 10 SMB-2-40 High Both 295 314 14500 34%
92%
Yes No SUPPLY VALVE V10-34A RHR SUPPRESSION POOL COOLING 10 SMB-2-40 High Both 295 314 14200 36 %
91 %
Yes Yes SUPPLY VALVE V10-65B RHR HX BYPASS VALVE 20 SMB-4-200 High Both 10 10 7550 913 % 9272 %
Yes No V10L65A RHR HX BYPASS VALVE 20 SMB-4-200 High Both 10 10 7400 1896 % 83093 %
Yes No Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances fOr rate of loading or stem friction degradation. Margins are determined based on as-left Settings (accounting for equipment error) in closing and limiting Capability in opening.
- 2. Valves Shown with negative margins have been evaluated to assess their operability.
- 3. Differential Pressures (DP) are given in ps?d. Flows provided are in gpm unless otherwise identified.
PAGE 11 OF 12
~
TABLE 2 VERMONT YANKEE - GL 89-10 VALVE INFORMATION SORTED BY MANUFACTURER SIZE, PRESSURE CLASS, AND TYPE Practical Risk Safety Open Close Close -
Margins To DP DP Valve ID Description Size. Actuator Significance Function DP DP Flow Close Open Test Tested WALWORTH.900 #, GLOBE VALVE V13-131 RCIC STEAM SUPPLY VALVE 3
SMEM)0-10 High Both 1112.4 o
oItmtr 903% 228 %
Yes Yes V13-30 RCIC PUMP DISCHARGE RETURN TO 4
SMB-o-1s Low Close o
1344 400 20 % 2127 %
No No CONDENSATE STORAGE TANK V23-25 HPCI PUMP MINIMUM RECtRCULATION 4
SMB-140 Low Both 1333.2 1358 450 21 %
201 %
No No VALVE V23-21 HPCI PUMP TEST RETURN VALVE TO CST 10 SMB-3-80 Low Close 130s 1315 3800
-2%
41 %
No Yes l
1 1
1
{
\\
l Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
- 2. Valves shown with negative margins have been evaluated to assess Mieir operability.
- 3. Differential Pressures (DP) are given in psid. Flows provided are in gpm unless otherwise identified.
PAGE 12 OF 12 l
_____a
9 TABLE 3
^
VERMONT YANKEE - LOW MARGIN MOVS savety Cios.
Open Risk Prated DP Vatve ID Description Function Margin Margin significance To DP Test Tested Comments V02-548 DARLING 4 inch 1500 # DOUBLE DISK GATE VALVE Close 42 %
1175 %
Low No No RX RECIRC PUMP DISCHARGE ISOLATION VALVE U02-74 WALW')RTH 3 inch 900 # SOLID WEDGE GATE VALVE Close
-5%
58 %
Low No No mal'; e "Ea r. ;y:E DRAIN CONTAIN ISO VALVE V02-77 WALWORTH 31nen 900 # SOLID WEDGE GATE VALVE Close 50%
145 %
' Low No No MAIN STEAM LINE DRAIN CONTAIN ISO VALVE V10-17 WALWORTH 20 inch 900 # FLEX WEDGE GATE VALVE Close 10%
142 %
Medium No No RECIRC SUPPLY TO RHR PUMP SUCT OUTBD ISOLATION VALVE V10-18 DARLING 20 inch 600 # DOUBLE DISK GATE VALVE Close 24%
46 %
Medium No No RECIRC SUPPLY TO RHR PUMP SUCTION INBD ISOLATION VALVE U10-183 WALWORTH 10 inch 300 # SOLID WEDGE GATE VALVE Open 2403 %
38%
Medium No No RHRSW T O RHR EMERGENCY FILL ISOLATION VALVE V10-184 WALWORTH 10 inch 300 # SOLID WEDGE GATE VALVE Open 796 %
27%
Medium No No RHRSW TO RHR EMERGENCY FILL ISOLATION VALVE V10-25A WALWORTH 24 inch 900 # FLEX WEDGE GATE VALVE Both 2916 %
6%
Low Yes Yes RHR TO RECIRCULATION LOOP ISOLATION VALVE Notes
- 1. Low margin is defined as less than 50% margin in the safety function direction.
- 2. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in Closing and limiting Capability in opening.
- 3. Valves shown with negative margins have been evaluated to assess their operability.
PAGE 1 OF 5
_. - ~. - - - -., - _ -..,..
_ _ _ _. -. _. ~. _ -. - - - _.., _ _ _
TABLE 3 VERMONT YANKEE - LOW MARGIN MOVS Safety Close Open Risk Practical DP Valve ID Description Function Manpin Margin Significance To DP Test Tested Comments V90-25B WALWORTH 24 inch 900 # FLEX WEDGE GATE VALVE Both 194%
12%
Low Yes Yes RHR TO RECIRCULATION LOOP ISOLATION VALVE V10-26A ANCHOR / DARLING 12 inch 300 # DOUBLE DISK GATE VALVE Both 50%
124 %
Medium No No RHR TO CONTAINMENT SPRAY ISOLATION VALVE V10-26B WALWORTH 12 inch 300 # SOUD WEDGE GATE VALVE Both 33%
92%
Medium No No -
RHR TO CONTAINMENT SPRAY ISOLATION VALVE V10-27A ROCKWELL 24 inch 600 # Y-PATTERN GLOBE VALVE Both 3%
80 %
Hgh Yes Yes RHR TO RECIRCULATION LOOP ISOLATION VALVE V10-27B ROCKWELL 24 inch 600 # Y-PATTERN GLOBE VALVE Both 16 %
93 %
High Yes Yes RHR TO RECIRCULATION LOOP SOLATION VALVE V10-31 A ANCHOR / DARLING 12 inch 300 # DOUBLE DISK GATE VALVE Both 50%
127 %
Medium No No RHR TO CONTAINMENT SPRAY ISOLATION VALVE V10-34A WALWORTH 10 inch 300 # GLOBE VALVE Both 36%
91 %
High Yes Yes RHR SUPPRESSION POOL COOLING SUPPLYVALVE V10-348 WALWORTH 10 inch 300 # GLOBE VALVE Both 34%
E2%
Hgh Yes No V10 34A dynamicatty tested RHR SUPPRESSION POOL COOUNG SUPPLY VALVE (N3W Notes
- 1. Low margin is defined as less than 50% margin in the safety function direClion.
- 2. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in Closing and limiting Capability in opening.
- 3. Valves shown with negative margins have been evaluated to assess their operability.
PAGE 2 OF 5
a TABLE 3 VERMONT YANKEE - LOW MARGIN MOVS -
sawy Ckne Open Risk Prachcal DP Valve ID Description Function Maryn Margin segnincance To DP Test Tested Comments V10-39A WALWORTH 12 inch 300 # SOUD WEDGE GATE VALVE Both
-10%
-67%
High Yes.
Yes RHR CONT SPRAY / SUPPRESSION POOL COOUNG SUPPLY VALVE U10-39B WALWORTH 12 inch 300 # SOUD WEDGE GATE VALVE Both 21 %
74%
High Yes No V1039A dynarmeellytested -
RHR CONT SPRAYISUPPRESSION POOL COOUNG SUPPLY (W W Cable W dh N *
. VALVE of 4160Vcabie.
V90-66 WALWORTH 4 inch 300 # SOUD WEDGE GATE VALVE Close 21 %
214 %
Low Yes Yes RHR LOOP CROSSCONNECT TO RADWASTE ISOLATION VALVE l
U1215 POWELL 4 inch 1500 # FLEX WEDGE GATE VALVE Close 28 %
125 %
Medium No
.No R EACTOR WATER CLEANUP CONTAINMENT ISOLATION VALVE U12-18 POWELL 4 inch 1500 # FLEX WEDGE GATE VALVE Close 42%
13237%
Medrurn No No REACTOR WATER CLEANUP CONTAINMENT ISOLATION t
VALVE V13-15 WALWORTH 3 inch 900 # SOLID WEDGE GATE VALVE Close 9%
59%
Low No No l
RCIC STEAM SUPPLY INBOARD CONTAINMENT ISOLATION VALW V1316 WALWORTH 3 inch 900 # SOLID WEDGE GATE VALVE Close 39 %
91 %
Low No No RCIC STEAM SUPPLY OUTBOARD CONTAINMENT ISOLATION VALVE U13-30 WALWORTH 4 inch 900 # GLOBE VALVE Close 20%
2127%
tow No No RCIC PUMP DISCHARGE RETURN TO CONDENSATE STORAGE TANK Notes
- 1. Low margin is defined as less than 50% margin in the safety function direction.
l l
- 2. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction I
degradation. Margins are determined based on as-left settings (accounting for equipment error) in Closing and limiting capability in opening.
- 3. Valves shown with negative margins have been evaluated to assess their operability.
PAGE 3 OF 5
ac TABLE 3 VERMONT YANKEE - LOW MARGIN MOVS Safety
- Close Open Risk Practical DP Valve ID Description Function Maripn Margin 4 7==,
TO DP Test Tested '
Comments V1612B WALWORTH 8 inch 900 # FLEX WEDGE GATE VALVE Both 48 %
229 %
High Yes Yes CORE SPRAY INJECTION ISOI.ATION VALVE V1626A WALWORTH 8 inch 300 # GLOBE VALVE Close 45 %
106 %
Low Yes Yes CORE SPRAY PUMP TEST UNE ISOLATION VALVE V23-15 WALWORTH 10 inch 900 # FLEX WEDGE GATE VALVE Both 16%
25 %
Low No No V23-14 dynamecally tested (N *h HPCI STEAM SUPPLY OUTBOARD CONTAINMENT ISOLATION VALVE V23-16 WALWORTH 10 inch 900 # FLEX WEDGE GATE VALVE Both 35 %
43 %
Low No No V23-14 dynamcally tested Odenteel WL HPCI STEAM SUPPLY INBOARD CONTAINMENT ISOLATION VALVE V23-19 WALWORTH 14 inch 900 # FLEX WEDGE GATE VALVE Open
-36%
36%
High No No V23-20 4.
.m4, tested (W *h HPCI DISCHARGE TO FEEDWATER ISOLATION VALVE M 20 WALWORTH 14 inch 900 # FLEX WEDGE GATE VALVE Open 1148 %
37%
Low Yes Yes HPCI PUMP DISCHARGE VALVE
]
V23-21 WALWORTH 10 inch 900 # GLOBE VALVE Close
-2%
41 %
Low No Yes HPCI PUMP TEST RETURN VALVE TO CST V23-25 WALWORTH 4 inch 900 # GLOBE VALVE Both 21 %
201 %
Low No No HPCI PUMP MINIMUM RECIRCULATION VALVE Notes
- 1. Low margin is defined as less than 50% margin in the safety function direction.
- 2. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
- 3. Valves shown with negative margins have been evaluated to assess their operability.
PAGE 4 OF s 1
TABLE 3 -
VERMONT YANKEE - LOW MARGIN MOVS safety Close Open Risk Practical DP Valve ID Description Function Margin Margin sgnificance To DP TW Tested Comments V70-19A WALWORTH 24 inch 150 # SOLID WEDGE GATE VALVE Both 35%
26 %
Medium Yes Yes SW SUPPLY HEADER CROSSCONNECT VALVE V7019B WALWORTH 24 inch 150 # SOLID WEDGE GATE VALVE Both 21 %
24%
Mednan Yes No V70-19A dynamcelly tested OdentcaW.
SW SUPPLY HEADER CROSSCONNECT VALVE V70-20 WALWORTH 20 inch 150 # SOUD WEDGE GATE VALVE Close 19%
32%
Medium Yes Yes SW SUPPLY VALVE TO TURBINE ButLDING COOUNG LOADS Notes
- 1. Low margin is defined as less than 50% margin in the safety function direction.
- 2. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
- 3. Valves shown with negative margins have been evaluated to assess their operability.
PAGE 5 OF 5
... _..., _.... _..... _.... - _.... ~.... _ _, _.....,
TABLE 4 VERMONT YANKEE - MOVS PRACTICAL TO DYNAMIC TEST Safety Close Open Risk DP Valve 10 Description Functon Margin Margin Signeticance Tested Comments
=
V10-25A WALWORTH 24 inch 900 # FLEX WEDGE GATE VALVE Both 2916 %
6%
Low Yes RHR TO RECTRCULATION LOOP ISOLATION VALVE V10-258 WALWORTH 24 inch 900 # FLEX WEDGE GATE VALVE Both 194 %
12%
Low Yes RHR TO RECIRCULATION LOOP ISOLATION VALVE V10-27A ROCKWELL 24 inch 600 # Y PATTERN GLOBE VALVE Both 3%
80%
High Yes RHR TO RECIRCULATION LOOP ISOLATION VALVE V10-278 ROCKWELL 24 inch 600 # Y-PATTERN GLOBE VALVE Both 16%
93 %
High Yes RHR TO RECIRCULATION LOOP ISOLATION VALVE V10 34A WALWORTH 10 inch 300 # GLOBE VALVE Both 36%
91 %
High Yes RHR SUPPRESS!ON POOL COOLING SUPPLY VALVE V10-34B WALWORTH 10 inch 300 # GLOBE VALVE Both 34 %
92%
High No V10-34A dinon-i.;;p tested (dentice W-RHR SUPPRESSION POOL COOLING SUPPLY VALVE V10-38A WALWORTH 4 inch 300 # GLOBE VALVE Both 153 %
298%
Low No High margin globe vane.
SUPPRESSION CHAMBER RHR SPRAY RING SUPPLY VALVE V10-38B WALWORTH 4 inch 300 # GLOBE VALVE Both 144 %
468%
Low No High margin globe vane.
SUPPRESSION CHAMBER RHR SPRAY RING SUPPLY VALVE V10-39A WALWORTH 12 inch 300 # SOLID WEDGE GATE VALVE Both
-10%
67%
High Yes i
RHR CONT SPRAY / SUPPRESSION POOL COOLING SUPPLY VALVE Notss
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
i t
PAGE 10F 4
TABLE 4 VERMONT YANKEE - MOVS PRACTICAL TO DYNAMIC TEST safety Close Open Risk DP i
ValveIO.
Description Function Margin Margin significance Tested Comments V10-398 WALWORTH 12 inch 300 # SOLID WEDGE GATE VALVE Both
. 21%
74%
High No V10-39A dynamically tested (idenhcal vaM). Cable tray interference requires RHR CONT SPRAYlSUPPRESSION POOL COCUNG removalof 4160Vcable.
SUPPLY VALVE V10-57 WALWORTH 4 inch 300 # SOLID WEDGE GATE VALVE Close 219 %
495 %
Lmy Yes RHR LOOP CROSSCONNECT TO RADWASTE ISOLATION VALVE l
V10-65A WALWORTH 20 inch 300 # GLOBE VALVE Both 1496 %
83093 %
High No High margin globe.
RHR HX BYPASS VALVE V1045B WALWORTH 20 inch 300 # GLOBE VALVE Both 913 %
9272 %
High No High margin globe.
RHR HX BYPASS VALVE V10-66 WALWORTH 4 inch 300 # SOLID WEDGE GATE VALVE Close 21 %
214 %
Low Yes l
RHR LOOP CROSSCONNECT TO RADWASTE ISOLATION VALVE V10-89A CCI 12 inch 300 # GLOBE VALVE Both 92%
481 %
High Yes RHR HX SERVICE WATER OUTLET VALVE V10-898 CCI 12 inch 300 # GLOBE VALVE Both 158 %
430 %
Hgh Yes RhR HX SERVICE WATER OUTLET VALVE V13-131 WALWORTH 3 inch 900 # GLOBE VALVE Both 903 %
228 %
High Yes RCIC STEAM SUPPLY VALVE V14-11 A WALWORTH 8 inch 900 # FLEX WEDGE GATE VALVE Both 169 %
337%
Medium Yes CORE SPRAY INJECTION VALVE Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are detemlined based on as-left settings (accounting for equipment error) in Closing and limiting Capability in opening.
PAGE 2 OF 4
TAILE 4 VERMONT YANKEE - MOVS PRACTICAL TO DYNAMIC TEST Safety Close Open Risk DP Valve ID Desenption Function Magin Mergr Significance Tested Comments V14-11B WALWORTH 8 inch 900 # FLEX WEDGE GATE VALVE Both 125 %
316 %
Medrum Yes CORE SPRAY INJECTION VALVE V14-12A WALWORTH 8 inch 900 # FLEX WEDGE GATE VALVE Both 141 %
318 %
High No V14-11 A, V14-11 B, & V14-128 CORE SPRAY INJECTION ISOLATION VALVE dpamicah tested (idenbcalva!ve).
V14-128 WALWORTH 8 inch 900 # FLEX WEDGE GATE VALVE Both -
48 %
229 %
High Yes CORE SPRAY INJECTION ISOLATION VALVE V14-26A WALWORTH 8 inch 300 # GLOBE VALVE Close 45 %
106 %
Low Yes CORE SPRAY PUMP TEST LINE ISOLATION VALVE V14-26B WALWORTH 8 inch 300 # GLOBE VALVE Close 56 %
108%
Low Yes CORE SPRAY PUMP TEST LINE ISOLATION VALVE V23-14 WALWORTH 10 inch 900 # FLEX WEDGE GATE VALVE Open 70 %
67%
High Yes HPCI STEAM SUPPLY VALVE V23-20 WALWORTH 14 inch 900 # FLEX WEDGE GATE VALVE Open 1148 %
37%
Low Yes HPCI PUMP DISCHARGE VALVE V70-117 WALWORTH 8 inch 150 # SOLID WEDGE GATE VALVE Close 82 %
35 %
Low Yes PRIMARY CONTAINMENT RBCCW RETURN VALVE V70-19A WALWORTH 24 inch 150 # SOLID WEDGE GATE VALVE Both 35%
26 %
Medium Yes SW SUPPLY HEADER CROSSCONNECT VALVE Notes
- 1. Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction degradation. Margins are determined based on as-left settings (accounting for equipment error) in Closing and limiting capability in opening.
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TABLE 4 VERMONT YANKEE - MOVS PRACTICAL TO DYNAMIC TEST sesety Ciose open Risk DP Valve ID Description Function Margin Margin significance Tested Comments V70-198 WALWORTH 24 inch 150 # SOUD WEDGE GATE VALVE Both 21 %
24%
Medium No V70-19A dynamica8y tested (identical W-SW SUPPLY HEADER CROSSCONNECT VALVE VFO-20 WALWORTH 20 inch 150 # SOUD WEDGE GATE VALVE Close 19%
32%
Medium Yes SW SUPPLY VALVE TO TURBINE BUILDING COOLING LOADS V70-257A MASONEILAN 4 inch 150 # GLOBE VALVE Both 205 %
395 %
Low Yes SFPC HX SERVICE WATER OUTLET THROTTUNG/ ISOLATION VALVE V70-2578 MASONEILAN 4 inch 150 # GLOBE VALVE Both 211 %
409%
Low Yes SFPC HX SERVICE WATER OUTLET THROTTUNG/ ISOLATION VALVE Notes 1 Margins represent overall gross margin to the minimum thrust. The margins do not include allowances for rate of loading or stem friction -
degradation. Margins are determined based on as-left settings (accounting for equipment error) in closing and limiting capability in opening.
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TABLE 5-VERMONT YANKEE - CLOSE DYNAMIC TEST RESULTS-Extrapolated l
Valve ID Design DP Test DP As-Left Setting Test Thrust DP Test Margin j
V1027A 304.8 376 102234 101627 0.60%
V10-27B 305.6 325 117040 82393 42.05 %
V10-34A 314 313 36542 27107 34 81 %
1 V10-39A 307 303.6 18765 12394.1 51.40 %
j i
V10-57 403 302.7 11820 2814 320.03 %
l V10-66 403 297.5 4474 2125.4 110.50 %
V14-11 A 360 325.4 23994 7876.7 204.61 %
V14-11 B 360 357 20943 8929 134.55 %
V14-128 389.5 360 17004 8331 104.11 %
I V14-26A 343 302.2 27103 15186 78.47 %
V14-26B 343 301.2 29358 15708 86.90 %
V23-21 1315 1240 83137 37828 119.78 %
V70-117 103.1 85.2 8837 2281.5 287.31 %
V70-19A 129.73 85.2 43542 19118.9 127.74 %
V70-20 139.01 122.22 27702 9982.3 177.51 %
V70-257A 91.1 75 5168 283 1726.29%
VTO-257B 91.1 73 5106 171 2885.89 %
Notes
- 1. As-Left Settings are corrected for equipment inaccuracies and are based on the as-left static test.
- 2. Extrapolated Test Thrusts are based on linear extrapolation and do not include equipment error.
- 3. Flow Loop Testing of valves V10-89A and V10-89B was also performed. Data cornpilation is in progress.
- 4. In-Situ Dynamic Testing of valve V13-131 was also performed under IEB 85-03.
Data Compilation is in progress.
- 5. DP Test Margin:
As-Left Settina - Extrapolated Test Thrust
- 100%
Extrapolated Test Thrust PAGE 1 OF 1
TABLE 6 VERMONT YANKEE - OPEN DYNAMIC TEST RESULTS Minimum Extrapolated Available Valve ID Design DP Test DP Calculated Thrust Test Thrust Thrust Available Margm.
V10-25A 344 2 352.8 51118.6 43229 53948 24.80%
V10-25B 289 8 315.8 48290.2 44804 53948 20.41 %
V10-27A 344.3 376 96948.6 41384 174941 322.73 %
V10-27B 327.7 303 90431.9 69966 174941 150.04%
V10-34A 295 251 22741.8 0
43325 INFINITE V10-39A 295 253.3 18491 12490.2 30963 147.90 %
V1411 A 280 274.9 6060.3 8663 26564 206 64%
V14-11B 280 267 6488.3 5740 27017 370.68 %
V14-128 304 289 8170.8 6136 26868 337.87 %
V23-14 1112.4 1020 31042.7 39322 51813 31.77 %
V23-20 1236.6 1250 58397.3 78529 79957 1.82%
V70-257A 90.3 72 1628.2 260 8056 2998.46%
V70-257B 88.7 69 1548.8 270 7887 2821.11 %
Notes:
- 1. Available Thrust is the limiting of the valve open thrust limit, operator open thrust limit, or reduced voltage thrust limit.
- 2. Extrapolated Test Thrusts are based on linear extrapolation and do not include equipment error.
- 3. Flow Loop Testing of valves V10-89A and V10-89B was also performed. Data compilation is in progress.
- 4. In-Situ Dynamic Testing of valve V13-131 was also performed under IEB 85-03.
Data Compilation is in progress.
- 5. V10-34A is a flow under the seat globe valie.
Available Thrust - Extrapolated Test Thrust
- 6. Available Margin:
. 100 %
Equipment erroris not included Extrapolated Test Thrust in this margin calculation.
PAGE 1 OF 1
FIGURE 1 - CLOSE MARGIN COMPONENTS j
Limiting Parameter As-Left Switch Setting a
m n
1.
- 1. Close Margin Minimum Thrust Setpoint Tables 2,3, and 4 m
2.
Minimum Thrust
- 2. DP Test Margin Table 5 DP Test Extrapolated Thrust Zero Thrust Notes: 1. The limiting parameter is the lesser of the valve thrust limit, operator rating, or reduced voltage limit.
- 2. As-left switch settings include allowance for equipment inaccuracies.
- 3. Minimum thrust setpoint is based on the valve factors in section 2.1 and includes allowances for rate ofloading (section 2.3) and lubrication degradation (section 2.2).
- 4. Minimum thrust is the calculated thrust without allowances for rate ofloading (section 2.3) and lubrication degradation (section 2.2).
- 5. DP test extrapolated thrust does not include allowances for equipment inaccuracy and is based on linear extrapolation.
- 6. Close margin demonstrates the margia available to overcome uncertainties in the MOV setpoint or degradations in performance. It is based on the as-left setting.
- 7. DP test margin demonstrates the margin available to overcome uncenainties in the MOV setpoint or degradations in performance. It is also based on the as-left setting.
m FIGURE 2 - OPEN MARGIN COMPONENTS Available Thrust
- 1. Open Margin i.
2.
Tables 2,3, and 4 Minimum Calculated Thrust
=
=
Minimum Thrust
- 2. Available Margin Table 6 DP Test Extrapolated Thrust Zero Thrust Notes: 1. The available thrust is the lesser of the valve thrust limit, operator rating, or reduced voltage limit.
- 2. The minimum calculated thrust is based on the valve factors in section 2.1, does not include stem rejection (section 2.5), and includes allowances for rate ofloading (section 2.3) and lubrication degradation (section 2.2).
- 3. Minimum thmst is the expected thrust calculated including stem rejection without allowances for rate ofloading (section 2.3) and lubrication degradation (section 2.2).
- 4. DP test extrapolated thrust does not include allowances for equipment inaccuracy and is based on linear extrapolation.
- 5. Open margin demonstrates the margin available to overcome uncertainties or degradations in performance. It is based on the available thrust.
- 6. DP test margin demonstrates the margin available to overcome uncertainties or degradations in performance. It is also based on the available thmst.
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