ML18054B465
| ML18054B465 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 02/23/1990 |
| From: | Smedley R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TAC-72889, NUDOCS 9003020169 | |
| Download: ML18054B465 (47) | |
Text
I consumers Power PDWERINli M.ICHlliAN'S PRDliRESS General Offices: 1945 West Parnall Road, Jackson,' Ml 49201 * (517) 788-0550 February 23, 1990 Nuclear Regulatory Connnission Document Control Desk Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT -
PRELIMINARY RESPONSE TO STAFF CONCERNS RELATED TO PORV/BLOCK VALVE MODIFICATION (TAC 72889)
NRC letter dated January 4, 1990 contains nine specific items of staff concern relating to the recently installed PORVs and Block Valves at the Palisades Plant.
NRC letter dated February 9, 1990 requests CPCo to respond to those nine specific items not later than February 23, 1990 and states that a "Draft" response will be acceptable. to this letter contains our draft response.
It is our understanding that this response will be discussed at a detailed technical meeting scheduled for March 8, 1990 which will be attended by technical staff from both -the NRC and Consumers Power Company with their consultants and management representatives.
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Richard W Smedley
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Staff Licensing Engineer CC Administrator, Region III, USNRC NRC Resident Inspector - Palisades Attachment
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OC0290-0014-NL02 ENCLOSURE 1 Consumers Power Company Palisades Plant Docket 50-255 RESPONSE TO STAFF CONCERNS RELATED TO PROV/BLOCK VALVE MODIFICATION February 23, 1990
1 Item 1 "CPCo's evaluation leading to the determination that the use of the Target Rock PORV in concert with certain operating procedures-meets the requirements of General Design Criterion 14 (Appendix A to 10 CFR Part 50) even though there likely will be a tendency for the PORV to open whenever the plant is taken to cold shutdown."
Draft Response 10 CFR 50 Appendix A, GDC 14 states, "The reactor coolant pressure boundary shall be designed, fabricated, erected and tested so as to have extremely low probability of abnormal leakage, of propagating failure, and of gross rupture".
System Operating Procedure SOP-1, Attachment 8 (Attachment 1) guides the operator through the process of opening the Isolation Valve approximately 5%
and ensuring the PORV is shut prior to fully opening the MOV.
This procedure*
recognizes that minor PCS leakage will occur if the PORV opens by pressure differential after the Isolation Valve is opened by informing the operator how to mitigate the situation.
Momentary lifting of the PORV during initial opening of the motor operated block valve with a significant differential pressure across the MOV is not unexpected (Reference 1) and is not considered abnormal leakage.
Item 2 "CPCo's Evaluation of the significance of the use of the Target Rock PORV in concert with certain operating procedures with respect to compliance with NUREG 0737, Item II.K.3. regarding actions to decrease the probability of a LOCA."
Draft Response The requirements of NUREG 0737, Item II.k.3 are met because the Palisades plant operates with the PORV Isolation valves closed.
Since the PORVs*are not used to mitigate the effects of design basis transients, use of Target Rock PORVs will not change Palisades compliance with II.K.3 from its previously approved condition.
Reference 1:
"Evaluation of PORV Response on Noyember 21, 1_989, Palisades Nuclear Plant", MPR Associates Inc. Report MPR-1166, January 1990.
OC0290~0014-NL02
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Item 3 "Thrust and torque traces from tests numbers 1, 13, 14 and 15 and CPCo's characterization of block valve operation during the tests."*
Draft Response 2
The maximum differential pressures that M0-1042A and M0-1043A will have to open and close against are:
(1) to CLOSE against is 2,100 psid, and (2) to OPEN against is 2,500 psid.
CPCo did not use the data from test #1 because data from test #10 is more representative of MOV stem condition prior to tests #13, 14, and 15.
Referring to figure 5, it can be seen that the pressure transient that occurred on 11/21/89 is very similar to test #15 (100% open test).
The details of test
- 15 are shown on figure 13.
After approximately 23 seconds, both tests indicate a final pressure of about 1,800 psi.
This assumes that M0-1042A was actually given a close signal as soon as the PORV opened.
In the plant event, M0-1042A was required to travel open for 19 seconds before a close signal could be given.
With this in mind, the actual system pressure during the event was less than the pressure seen by M0-1042A during Wyle test #15.
CPCo has evaluated the maximum differential pressure that M0-1042A and M0-1043A will have to close against.
The worst case condition is enveloped in Wyle test
- 13 (60% open test).
During test #13 (figure 6) the final differential pressure measured was approximately 2,100 psid and positive closure was seen, heard and measured.
A margin also existed.
A VOTES report of test #13 is included as attachment 2.
Wyle test #14 also proved that M0-1042A can close with a differential pressure as high as 2,450 psid with a small margin.
There are however, some test results sponsored by the USNRC (NUREG/CR-5406) that may indicate that maximum dynamic forces may not have time to build up when valve closure is initiated when the valve is less than or equal to the choke position (where the valve is controlling the pressure drop in the system) of the valve.
Therefore, the results of test #14 may not be representative of requirements to close the valve in one attempt at 2500 psid.
OC0290-0014-NL02
Item 4 "Thrust delivered by each block valve motor operator, and the required thrust for all differential pressure conditions for which the block valves are to be qualified."
Draft Response The thrust delivered for M0-1042A and M0-1043A at torque switch (T/S) trip measured on 12/15/89 are:
M0-1042A M0-1043A T/S Setting
- 1. 75 2.00 Thrust 15, 787 lbs 15,532 lbs Static test #10 performed just prior to the 60% open dP test yielded a torque switch trip thrust of 15,797 lbs. at a T/S setting of 2.00.
3 The Wyle tests show that the thrust required to close the valve at 2100 psid is 11,706 lbs, (Wyle Test* No. 13) and the thrust required to open the valve at 2500 psid is 7500 lbs (Wyle Test No. 7).
Therefore, thrust required to open at 2100 psid would be less than 11,706 lbs.
If the valve would be used for once-through-cooling at 2500 psid it would not have to be to closed until the pressure had dropped below 2100 psia.
Absolute thrust values measured by both test systems are suspect and will only be used for trending and relative margins because of the following reasons.
- a.
Lack of adequate piping supports at Wyle's test facility allowed for excessive vibration which is believed to contribute to the difficulty in locating a reference point of zero load on the stem.
This type of thrust signature has not been encountered by B&W during any of their previous in situ plant differential pressure testing. NOTE:
B&W is Liberty's sole contractor for performing testing with VOTES MOV diagnostic test system.
- b.
CPCo did not re-check the calibration of the VOTES sensor after maintenance-on the MOV (ex. operator removal, spring pack removal, valve disassembly).
Since the calibration of the VOTES sensor relies on the entire valve/operator to act as a large complex spring, anything that affects the rigidity of this spring may affect the sensor calibration.
NOTE:
A calibration check is scheduled for both block valves during this spring's maintenance outage.
OC0290-0014-NL02
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4 Item 5 "The margin between delivered and required thrust and the program for assuring that this margin is maintained."
Draft Response Using test #13 (attachment 2) thrust measurements only for reference values, the margin between required thrust and the delivered thrust can be calculated by two methods as follows:
- 1.
Torque switch actuation occurred at 11,706 lbs. and hard seat contact occurred at 8,637 lbs.
Subtracting the two yields a margin of 3,069 lbs.
above what was required to completely close the valve against 2,100 psid.
- 2.
Looking at spring pack displacement (Spare Channel) as measured by a MOVATS TMD in attachment 5 and figure 11:
Initial TMD voltage Voltage at T/S trip Voltage at hard seat contact 4.80 volts 6.552 volts
= 5.795 volts Using figures 7, 8, 9 & 10 the difference in measured spring pack displacement can be converted into a torque output from the operator as follows:
T/S trip = 6.552 volts Initial = 4.800 volts 1.75 volts Hard seat= 5.795 volts
- Initial = 4.800 volts
.995 volts Using the TMD calibration curves in figures 7 & 8 a spring pack displacement of:
0.170 inches is measured for T/S trip.
and 0.098 inches is measured for Hard seat contact.
Using the Limitorque spring pack displacement vs torque curves in figures 9
& 10 a torque of:
144 ft-lbs is measured at T/S trip.
and 124 ft-lbs is measured at Hard seat contact.
OC0290-0014-NL02 i
J The torque margin between the required torque (hard seat contact) and the actual torque (T/S trip) is:
144 ft-lbs 124 ft-lbs 20 ft-lbs Assuming a poorly lubricated stem (.2 friction factor) the valve stem factor would be.01022.
Converting *torque into thrust would yield a thrust margin of:
20 ft-lbs. I.01022 = 1,957 lbs margin Assuming a properly maintained stem (.15 friction factor) the valve stem factor would be 0.0082.
Converting torque into thrust would yield a thrust margin of:
20 ft-lbs. I. 0082 = 2,439 lbs. margin 5
Based upon the maintenance performed to M0-1042A and M0-1043A on 12/15/89, 2,439 lbs is the margin as calculated using spring pack displacement.
It should also be noted that figure 11 reveals that only one half of the spring pack margin.is required to provide enough torque to*fully seat M0-1042A during test #14 (2,450 psid test).
In preparation of responding to NRC Generic Letter 89-10 the following preventive maintenance activities are planned to be used to ensure long term operability of M0-1042A and M0-1043A.
- 1.
A 24 month inspection that will include all electrical components inside the limit switch compartment and back to the power supply breaker.
- 2.
A 24 month inspection that will include all mechanical aspects of the valve and operator including; grease condition, valve leakage, fastener tightness and stem lubrication.
- 3.
A 48 month inspection that would include those items in Item #1 plus determining the condition of limit switch grease and completing diagnostic testing of the valve and operator.
OC0290-0014-NL02
Item 6 "The accuracy of the Wyle test thrust values, including consideration of instrument calibration uncertainties."
Draft Response 6
Two (2) test systems were used during the Wyle testing.
Each system independently monitored stem thrust and switr.h settings and one system measured spring pack movement (torque).
One system (termed the B&W system) was supplied by Babcock and Wilcox (B&W) and was being used on site when the 11/21/89 event occurred. It was calibrated on 10/20/89 with a calibration due date of 4/20/90.
The second system was supplied by Liberty Technology (termed Liberty system) for the sole purpose of providing a backup Motor Operated Valve (MOV) test system in case a malfunction occurred during testing.
This system was calibrated on 12/01/89 with a calibration due date of 6/1/90.
Upon completion of all testing on M0-1042A and M0-1043A both systems were returned to their owners.
Palisades has since purchased our own VOTES test system to be used for future.,'
Company test;ing.
Liberty Technology Inc. (Liberty) has concluded, after review of the available data from both systems, that both systems produced results within 10% of each other.
The Liberty system was chosen to base our operability decisions on because of the following reasons:
- a.
The Liberty system had the most recent calibration.
- b.
Due to a faulty cable only one system could monitor all test parameters.
- c.
Only one LVDT (to measure spring pack displacement) was available.
- d.
Acquisition of data from the 100% full stroke test was missed with the B&W system due to personnel coordination difficulties.
- e.
During disassembly of the.test setup, shipment of the valves back to Palisades _and/or re-installation of the valve back into the plant system the thrust sensor that was monitored by the B&W system was damaged and could not be used for future trending of MOV performance.
Absolute thrust values measured by both test systems are suspect and will only be used for trending and relative margins because of the following reasons.
- a.
Lack of adequate piping supports at Wyle's test facility allowed for excessive vibration which is believed to contribute.to the difficulty in locating a reference point of zero load on the stem.
This type of thrust signature had not been encountered by B&W during any of their previous in situ plant differential pressure testing.
NOTE:
B&W is Liberty's sole
- contractor for performing testing with VOTES MOV diagnostic test system.
OC0290~0014-NL02
7
- b.
CPCo did not re-check the calibration of the VOTES sensor after maintenance o*n the MOVCoperator removal, spring pack removal, valve disassembly).
Since the calibration of the VOTES sensor relies on the entire valve/operator to act as a large complex spring anything that affects the rigidity of this spring may affect the sensor calibration. NOTE:
A calibration check is scheduled for both block valves during this spring's maintenance outage.
While CPCo does not believe that the test data acquired at Wyle (system and MOV parameters) is accurate enough to produce research quality results, we do believe that the data acquired is more thorough than most data that has or would be acquired during actual plant in situ dP testing performed by most utilities and that it is adequate to qualify the valves for their present use.
OC0290-0014-NL02
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Item 7 "Changes necessary to design documents, particularly with respect to actuator sizing calculations."
Draft Response 8
CPCo recognizes that the PORV Block Valve Actuator thrust margin needs to be increased.
Several alternatives are being considered.
These include the Edward/Limitorque reevaluation of the actuator and a minor re-design of the valve stem.
CPCo recognizes that some change is necessary to ensure long term operability and is evaluating various options with the assistance of the vendors.
oco290;..0014-N102
Item *a "Documentation of valve vendor approval for the use of.the valve actuator to deliver the reported thrust."
Draft Response 9
Edward Valve, Inc. has provided, as a part of the documentation furnished with the replacement PORV block valves, the following documents which substantiate the use of the furnished limitorque SMB-00-25 actuator for the Edwards gate valve:
PAL-2119 PAL-4131 PAL-7127 Design Report Actuator Sizing Calculations Summary Qualification Reports The documents listed above give the sizing criteria for the actuator versus the Consumers Power Company design requirements as stipulated in the purchase specification, the resultant actuator sizing and thrust/torque requirements, the stress levels versus ASME code requirements for the valve pressure boundary and stem, and the overall environmental and seismic qualification of the valve/actuator assembly.
They show that the design meets the original Consumers Power Company requirements and this has been substantiated by testing and by an independent, third part review.
However,- subsequent testing has shown that vendor calculated thrusts do not provide enough margin to ensure operability.
At the present time, the valves are being operated at thrust values which are above the vendor recommended values.
oco290~0014-N102
10 Item 9 "Ability of the PORV to close electrically."
Draft Response A Technical Specification Surveillance program has been developed to monitor the condition of the Target Rock PORV's.
Detailed testing will be performed under the IS! program to verify the status of the pilot, spring, and low drag forces.
It is important to understand the postulated cause for the extended opening due to pressure forces.
The PORV is closed by pressurizing the control chamber above the disc when the solenoid is de-energized, the control chamber is pressurized by the inlet piping through the inlet ports.
When the solenoid is energized, the pilot valve lifts. This isolates the inlet piping from the control chamber and allows the control chamber to depressurize through the outlet piping.
Target Rock uses differential areas and pressures to assure that the PORV will remain closed.
The differential areas are such that the PORV will remain
. *-~ *_.:
closed if the control chamber pressure is greater than 35% of the inlet pressure.
The PORV will remain open if the control chamber pressure remains below 35% of the inlet pressure.
The Palisades PORV's are used to provide LTOP protection during startup and shutdown.
The control chamber may fill with water due to steam condensation or by the PCS when solid.
Testing at Wyle indicated the water in the control chamber will not drain out with the pilot closed.
Thus the control chamber will remain full of water unless the PORV is electrically actuated.
After a period of time, this liquid will become subcooled.
Introducing steam to the bottom of the control chamber will not pressurize the control chamber (and close the PORV) until the liquid reaches saturation temperature.
We believe this is why the PORV remains open for so~e period of time when the inlet pressure is rapidly increased with steam.
Inlet pressure rises and control chamber pressure will remain low until reaching saturation temperature.
This helps understand why cycling the PORV prior to opening the MOV helps reduce the time the PORV is held open by inlet pressure. Electrically opening the PORV squeezes some of the water out of the control chamber as incorporated in SOP-1.
It is important to note that the Target Rock position indication correctly identifies valve position. Dresser PORV position indication identifies the position of the solenoid, not the PORV.
Making actual valve position indication available to the operators is a big asset in promptly mitigating LOCA.
- OC0290-0014-NL02
Testing performed at Wyle provided an improved understanding of Target Rock PORV perfo~ance characteristics. If the MOV were improperly opened to 100%
11 without allowing PORV inlet pressure to stabilize, electrical actuation (open and then closed) of the PORV will result in prompt closure of the PORV.
The Target Rock PORV has. performed properly in all cases when electrically actuated.
The PORV was electrically energized and de-energized numerous times at Wyle, with no indication of problems.
OC0290--0014-NL02
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..:l60
.2ao
.300
.J2a SPRING PACK DISPLACEMENT ~:inches}
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SMB-00 MEDIUM SPRING PACK DISPLACEMENT VS TORQUE CURVE Limitorque Spring Pack Part Number 0301-112 SP-PACK
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w140-1--~-f-~~-+-~~-1--~-+~~-+-~~A--.-~~~-1-~~~
- > a fr:
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.100
.120
.140
.* 160
.160
..200
.220 SPRING PACK DISPLACEMENT {inches)
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.M*-*--o<****--*---** ____..... imJ_1.,
M0-1042A SPRING PACK COMPRESSION PRIOR TO TORQUE SWITCH TRIP (42ATMD) t-TORQUE SWITCH TRI>>
~ 0.50....................................... -.............. -......................... -....
~
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- 0. 00--+-------"!'-. ____ _,,
-:-*--1.*. -....... *..... -... *:-....... - --:.
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- ~~------~~--~--*----*
~ ~o.so......... ;... *...... :......... ;.... -~**~*;,....... :_.\\ ___ -l *.. _..... :.. -
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- - - 25 % 0 PEN g:.
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- : - - STATIC 12/8 o
FLOY( CUT OFF :t*)
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-:; ~ 1.50... -..... ~... ---.... :.......... :.... --... *'......... -*......... *i* -...... -.;.......... :
(/)
__J 2 00 0
.------------1--*-------,-----1~-
.6 l.2 10'!
1.6 1.8 TIME (seconds).,,,
2.0 2.2 6:
111 Q
v GI N.
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~-
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M0-1042A THRUST 2 SECONDS PRIOR TO TORQUE SWITCH TRIP (TESTTHRU) 5,000 TORQUE SWITCH TllP
...,....... I' I.............. -
~
- l.
-6 I
~~-** ~**-.....
Ii
- * *
- 60% OPEN.(# 13)
... ** ** ** ~~........-::fl'......... *.,..
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- - -... :. -........ *........... '....... -... _ -.. ~
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- :':~:
r.. -.. 25% OPEN (#14)
(/)
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z
-15,000*
- -20,000 I 1-.--.---- ------1
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- * * ** :.... ***:*.-:::;~*:: * * <* * * * **'. * * * * *: * * * *.. ;-.~.:. * *.. -'.* * * * *
- j * **... STATIC 12/6 ( # 1)
~~"*.
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1.1 12 1.l 1.4 1.5 1.6 1.7 1,6 1.9 2.0 2.l 2.2 2.3 TIME (seconds)'i* ;.,..
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II 110-1042A 1001 OPEN DYNAMIC FLOW TEST.AT 2,500 pal INITIAL PRESSURE, 818,450 lbm/hr (100-TEST1
- T/STRP.
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I OC0290-0014-NL02 ATTACHMENT 1 TO ENCLOSURE 1 Consumers Power Company Palisades Plant Docket 50-255 SOP-1, ATTACHMENT 8 February 23, 1990 3 Pages
1.0 OP!liI~'or* PORV' ISOLATIOH VALVES
,** - ~
- Ii:
.r;_*:-:*.*
&, POW= open. during~ performance of Step* 2.0.c AND' the applicable PCS pressure action limit is exceeded (refer to table belo'!"), 1!!!f-the* following-actions shall be takenl *
- 1.
Clos_.. affected POW' Isoiation Valve.
- 2.
Restore PCS pressure* as directed by Shifr Supervisor.
- 3.
When directed* by* Shift Supervisor,* repeat Section 2.0 to open PORV Isolation Valve one additional time (ie, Total of TWO attempts. per.. channel are allowed).....
Procedure Currently
.-i~
In-Use PCS Pressure Action. Limitt~
SOP l 1800 DSia, EOPs 200 psi a Decrease
~-
OR Below Minimum PCP Operation Curve OR Below 25°F Subcooling Curve
- b. If a PORV does open during performance of this attachment, it should close in approximately 10 to 20 seconds.
- c.
PORV Isolation Valves (M0-1042A and M0-1043A) only have a seal--in feature for closing. Opening circuit does not have seal-in feature.
- d. this attachment shall be performed one channel at a time.
~-;:~.i._:*
e~ !lacing PORV handswitches to AUTO is specifically covered by
- another step in procedure currently in-use.
f~:-:
~
ij'....
~
~:(
u;;
~.....
- .~
pa0679-0284j-89~93
2.0
~=
OPENING OF PORV*ISOLATIOH VALVES:
are listed in parenthesis.
- a. Verify or establish.the following conditions:
- 1.
PRV-1042B (PRV-10438) handswitch in CLOSE position.
- 2.
M0-1042A (M0-1043A) closed *.
- 3.
PCS pressure control established:
Procedure Currently In-Use SOP 1 PCS Pressure Limit 2000 to 210(), sia.
Ai:t'a Re*dsioa:*2~:
- Page ? oi* 1':~ *
- EOPs As directed by Shift Supervisor" (preferable to be at least 200 psia above 25°1" Subcooling:
Curve)
- b. *open and then close PRV-10428 (PRV-10438).
Leave handswitch in CLOSE position when complete.
CAUTIOll The following step may result in opening PRV-10428 (PRV-10438).
- c. Operate handswitch for M0-1042A (M0-1043A) intermittently to the OPEN position until either of the following conditions is observed:
- 1.
M0-1042A (M0-1043A) red position indication lamp lights (indicates valve i's 5% open, green position indication lamp
- -- is also lighted at. this point).
2 *. *:: PRV-1042Jl (PRV-10438) opens.
- d. IF PRV-10428 (PRV-10438) opens AND then reseats, ~
repeat Step c.
pa0679-0284j-89-93
- .j
OPEBIHG OF POB.V ISOLATIOll VALVES;
~L2:1;
...,.. ~,would not be performecl if Step 1.0.a actions wer:e*
- ,*.. -t....,.
- e. WHO: the followins conditions exist, ~
fully open M0-1042A (M0-1043A).
- 1.
- M0-1042A (M0-1043A) is 5% open (red position indication lamp lit).
- 2.
PRV-1042B (PR.V-10438) is closed.
- ~
£. Repeat this attachment for remaining POR.V Channel.Isolation Valve..
pa0679-0284j-89-93
- ~
OC0290-0014-NL02 ATTACHMENT 2 TO ENCLOSURE 1 Consumers Power Company Palisades Plant Docket 50-255 VOTES REPORT ON TEST NO. 13 February 23, 1990 13 Pages
PLAN)~ PA~ISADES Test 8u1 ts Summa*ry
-1',f.C/;~ £#V,-
UNIT: 1 Valve Tag NumbeT: M0-1042A Test Num5eT:
13 Test Date:
12/8/89 Test Conditions Full Open Full Closed Flow <GPMJ 1126 0
Upst*ream P*ressu*re <PSI->
0 2100 DownstTeam PTessuTe <PSI) 0 0
MotoT Voltage 460.00 Volts AC
~---------------------------------------------------------------
Switch Settings Open ToTque Switcfi Setting 2.000 Close ToTque Switch Setting E.000 DuTations <seconds)
Closing StToke Time 11.582 Open IndicatoT Light Off seconds 11.064
% stToke 95.53 Seating Time -
0.125 ContactoT DTopout Time
-0.001 FoTces (lbs)
Closing Max Running FoTce
-6933 Avg Running FoTce
-1961
- ThTust When Disc Motion Stops
-8637 SpTing Pack PTeload
-6137 ThTust at £ST
-11706 ThTust at ContactoT DTopout
-12956 IneTtial ThTust 341 Maximum Thrust
-12615 Available ThTust MaTgin At CST
-3068
~--
Moto*r CLrr*rents Inrush CurTent Camps Tms)
Closing AveTage Running CuTTent Current at Contactor Dropout General Comments:
23.7 0.0 6.0 2~00 DSi closin~ test at full flo~
MOU initial position 1t 60 ~ ooen.
Flow l.n1tiated *Oy opening 1-*0RV.
1-low ~ sec a'tter sta*rt = -:i62,650 lb/h*r.
Voltage maintained 480 vac+/- 2vac throughout the t~st.
Didn't start data collecti6n prior to PORV opening. 0 hard ta define.*
Final upstream press was app~ox. 2100psi. Second attempt, first test missed.
,.J:.~*
.,~.'{~~!
r* P-"c.1
'i~!l
~
. Test Ill
'1218/89 1s:z4:43 lbs aJRROO OOELOPE allps l'llS
'1 20...:::i 10
-o Test of Valve >>M0-1042A 5001 10001 5*)01 10001 T iMe in Hi 11 iseconds Test >> 13 Test Date 12/8/89 Test Time 15:24:43 Valve Calib~ation -3.726E-00~3 µv/v/lb
~*
Test of Valve #M0-1042A Test #
13 Test Date 12/8/89 Test Time 15:24:43 Valve CalibTation -3.726E-0003 pv/v/lb Label Time Fo*rce
<lbs)
CL1*r*rent Descdption
<msecs)
<Unco*r*rected)
<am~s rms)
C4 3
796
- 1 Closing Running Condition <Necn Be~inning>
C5
%~~*
-ll05 0.0 Closin~ Running Condition <Necw En >
C0
-1591 0.1 Moto*r t.nt C1 439
-1705
- 23. -,
I lYrUSh CLl'r*rent C2 59'3
-2159 3.5 AfteT Current Restabilizes C13 11444
-6137 4.4 S~Tin8 Pack Starts to Compress C10 11476
-6251 4.3 F ow utoff C8 11477
-6251 c.*
Open IndicatoT Light Off <Red)
'f.;J C11 11911
-8637 5.1 Disc Motion Stopped By Seat C15 11'394
-12956 6.0 Motor Current Peak at Cutoff C14 11 '3'35
-11706 5.9 Close TorRue Switch Opens <o*r CST>
C16
.12036
-12615 0.1 Maximum THrust Value C17 12097
-12274 0.0 Final Thn1st Value
.. *~Test 113
- 1218189
- - 15:24:43 SPARE OWltEL Volts = -5.834
-s.0
-6.0 Time in Seconds 11. 914 T9rque s,itch Setting.Open/Close ***************
L1m1t Switch Rotor AaJustment <YIN> ************
Flow ( g pm) Start/Fini?h ******** ~. ~ *****.*******
Upstream Pressure <psi> _Start/F1n~s~ ***********
Do~nstream Pressure <psi> Start/F1n1sh *********
2.000/2.000 N 1126/
0 0/ 2100 0/
0 G~1lEnal.Cornments:t t t f 11 fl MDV* *t* *1
- t*
t c.0 o/
~~***~
2~~~ psi closing es a
u ow.
in1 ia pos1 ion a o
~ open.
Flow initiated 5y o~ening PORV.
Flow 2 sec after start = 562,650 lb/hr.
Voltage maintained 480 vac+/- 2vac throughout the test.
Didn't start data collection prior to PORV opening. 0 hard to define.
Final upstream press was approx. 2100psi. Second attempt, first test missed.
Valve Information Valve Actuator Actuator Motor Plant
.PALISADES Unit 1
Tag Number M0-1042A T).'pe GATE Size 4"
Target Thrust 12600 lbs O*rientation VERT Location WYLE LAB-NORCO Stem Material A564-630 Stem Diameter 1.000 inches Threads per in.
6.00 Elasticity(10E6) 28.400.psi Poissons Ratio 0.291 Lead 1
VOTES Serial ij A3371 Valve Calibration -3.726E-0003 µv/v/lb Actuator Type LIMITORQ Size SMB-00 Max Th*rust Rate.
14000 lbs Serial ij
- . L412163 Order ff 145155-0 ij Worm Gear Teeth Gear Ratio 23.1 Spring Pack ij 0301-112 Voltage <AC/DC> AC Volts 460 Amp rating 6.00 amps Nominal Speed 1700.00 rpm Start torque 25.00 ft-lb Run Torque 5.00 ft-lb Horse Power 1.60 h.p.
Signal Conditioner Calibration Due Date 6/1/90 Vo~es Force Offset: -53~17 lbs
Test 11.~
"1218189 e
"'"TT/f'&tf ec,.,.,-_ _,.;
/?'1/"4r:... s->,;~
15:24:43 SPARE CHAtltEL Volts = -4. 786
-s.0
-6.0
-7. o---..-r-.-~..--r--r-T-r-.-~..--..-.-T-,.--.-..,-.....-,.....,-T-r--.-..,-..-
suui iu*iu i Time in Seconds 8. 827 Torque Switch Setting Open/Close ***************
Limit Switch Roto~_Aijjustment CY/N)...*......**
Flow (gpm~ St.:1:rt/Fin1~h*!.******~*~*************
Upstream Pressure <psi) btart/Finish **.**.*.*.*
Downstream Pressure (psi) Start/Finish ******.**
General Comments:
2.000/2.000 N 112£./
0 0/ 2100 0/
0 2500 psi closing test at full flow.
MDV initial position at t.0 % open.
Flow initiated By opening PORV.
Flow 2 sec after start = 562,650 lb/hr.
Voltage maintained 480 vac+/- 2vac throughout the test.
D~dn't start data collection prior to PQRV opening. 0 hard to define *.
Final upstream press was approx. 2100psi. Second attempt, first test missed.
Valve Information Plant PALISADES Unit 1
Tag Number M0-1042~
Type GATE Size 4"
Target Thrust 12600 lbs 0-rientation VERT Location WYLE LAB-NORCO Stem Material A564-630 Stem Diameter 1.000 inches Threads oer in.
6.00 Elasticity (10E6)
- 28. 400 psi Poissons Ratio 0.291 Lead 1
VOTES Serial #
A3371 Valve Calibration ~3.726E-0003 µv/v/lb Valve Actuator Actuator Type LIMITORQ Size SMB-00 Max Thrust Rate.
14000 lbs Serial #
L412163 Order #
145155-0
>> Worm Gear Teeth Gear Ratio 23.1 Spring Pack # 0301-112 Actuator Motor Voltage CAC/DC> AC Volts 460 Amp rating 6.00 amps Nominal Speed 1700~00 rpm Start torque 25.00 ft-lb Run Torque 5.00 ft-lb Horse Power 1.60 h.p.
Signal Conditioner Calibration Due Date 6/1/90 Votes Force Offset: -53017 lbs
.~
- Test 113.
.,.>~~,-..
~-~
.c 1218189
- -15:24:43 SPARE aWllEL Volts= -4.759
. -5.0
-6.0 Time in Seconds 8.194 T9*rqtte S~itch.,Setting,Open/Clos~.,* ************* :- 2.000/2.000 L1m1t Sw1t~h RotoT.AQJUStment ((;N) ************ : N Flow (gpm~ Stci:rt/F1m?h*;-...******~*~****~********= 1126/,
0 UpstTeam PTessuTe <ps1).~taTt/F1n~s~ *********** :
0/ 2100 Downstream PTessuTe <psi> Start/F1n1sh ********* :
0/
0 GeneTal Comments:
- ).
~500 ps~ 9losing test *t ful! flow.
MOV initial position a~ 6~ % open.
Flow in1t1ated 5y ogen1ng PORV.
Flow 2 sec afteT start = 5b2,b50 lb/hT.
Voltage maintained ~80 vac+/- 2vac throughout the test.
Didn't staTt data collection pTioT to PORV opening. 0 haTd to define.
Final upstTeam press was approx. 2100psi. Second attempt, fiTst test missed.
Valve Information Valve ActuatoT Actuator MotoT Plant PALISADES Unit 1
Tag NumbeT M0-1042A-IYPe GATE 01ze 4"
TaTget Thrust 12600 lbs 0-rientation VERT Location WYLE LAB-NORCO Stem Material -
A564-630 Stem Diameter 1.000 inches Threads peT in.
6.00 Elasticity< 10E6)
- 28. 400 psi
. Poissons Ratio
- 0. 291 Lead 1
VOTES SeTial >>
A3371 Valve CalibTation -3.726E-0003 ~v/v/lb Actuator Type LIMITORQ Size SMB-00 Max ThTust Rate.
14000 lbs SeTial "
L412163 OTdeT "
145155-0
" WoTm GeaT Teeth GeaT Ratio 23.1 SpTing Pack " 0301-112 Voltage <AC/DC> AC Volts 460 Amp Tating*
6.00 arnpi Nominal Speed 1700.00 Tpm StaTt toTque 25.00 ft-lb Run ToTque 5~00 ft-lb Horse Power 1.60 h.p.
Signal Conditioner Calibration Due Date 6/1/90 Votes Force Offset: -53017 lbs
p e
/1-77**'-rf' 1/ ~'t; 7-- ---:,j
.Test 113
'* 12/8189 15:24:43 OOl'ES SDtSOR lbs aJRRDn' DtJELOPE
~
nlS 20 10 7995 3995 9995 10995 12'95
-0~....................................................................................................ll.-........+1............. ~~
7995 8995 9995 10995 12395 Time in Milliseconds Test of Valve ttM0-1042A Test tt 13 Test Date 12/8/89 Test Time 15:24:43 Valve Calibration -3.726E-0~03 µv/v/lb Label C13 E!0 C11 C15 C14 El~
Time (msecs) 11444 11476 11477 11'H1 11994 11'395 H~~~
Fo*rce
<lbs)
( Unco*r*rected)
-6137
-6251
-6251
-8637
-12956
-11"706
=l~~~~
Clrr*rent (amP.s *rms) 1+. 4 4.3 4.5 5.1 6.0 5.9 0.1*
0.0 Description Spring Pack Starts to Compress Flow Cutoff Open Indicator Light Off <Red)
Disc Motion Stopped By Seat Motor Current Peak at Cutoff Close Tor~ue Switch Opens Cor CST>
M*xiIDum TMrust Value Final rhrust Value
~
.'/
Test 113
'17/8189
-1s:z4:43 IJOl'!S SOOOR lbs
-10000
-15000
-20000 7995 8995 10995 11995 12995 30 CURROO OOELOPE amps l'll1S 20 10
-~
Time in Mi II iseconds.
Test of Valve >>M0-1042A Test tt 13 Test Date 12/8/89 Test Time 15:24:43 Valve Calibration -3.726E-0003 µv/v/lb
e
- lT*lf-t:~*,-,fl.. ?'Hai~~
, Test i13
~.c.:
CLOSE LIOO Time in Milliseconds Test of Valve MM0-1042A Test ~
13 Test Date 12/8/89 Test Time 15:24:43 Valve Calibration Label C4 C"'"
c0 Cl C2 C13 C10 CB Cl!
C15 C14 C16 C17 Time
<msecs) 3 402 413 439 599 11444 11476 11477 11911 11 '~94 11995 12036 12097
-3.726E-0003 µv/v/lb Force (lbs)
Current
<Uncorrected)
(amps rms) 796 0.1
-1705 0.0
-1591 0.1
-1705 23.7
-2159 3.5
-6137 4.4
-6251 4.3
-6251 4.5
-8637 5.1
-12956 6.0
-11706 5.9
-12615 0.1
-12274 0.0 Description Closing Running Condition <Near Beginning)
Closing Running Condition <Near Ena>
Motor Start Inrush Current After Current Restabilizes Spring Pack Starts to Compress Flow Cutoff Open Indicator Light Off <Red)
Disc Motion Stopped By Seat Motor Current Peak at Cutoff Close Torque Switch Opens (or CST>
Maximum Thrust Value Final Thrust Value
P~E. /~'l}i~
Test 113 "1218189
. 15:24:43 IJOI'ES SOOOR lbs 5001 10001 CLOSE TIS OPDt LI 00 OPEtt LIS CLOSE LHm' 5001 10001 Time in Milliseconds Test of Valve >>M0-1042A Test f:t 13 Test Date 12/8/83 Test Time 15:24:43 Valve Calib~ation -3.726£-0003 µv/v/lb
-Test 113
<*1218/89 1s:z4:43 OOl'ES SOOOR lbs
- 10000 CLOSE TIS OPD1 LIOO OPFJt LIS CLOSE LI Gm' 8395 Test of Valve ~M0-1042A 99'5 10995 in Millisea:mds Test tt 13 Test Date 12/8/8'3 Test Time 15:24:43 Valve Calibration -3.726E-0003 µv/v/lb Label C13 C10 CB Cl!
C15 C14 Ei9 Time (msecs) 11444
- 1147E, 11477 11'311 11 '3'34 11 '3':35 rn~~~
Fo*rce (lbs)
<Unco*r*rected)
-6137
-6251
-6251
-.%37
-12'356
-11706
=rn~?~
Cu*r*rent
<amP.s rms)
- t+.4 4.3 4.5 5.1 6.0
- 5. '3
~:~
Desc*ri ption Spring Pack Starts to Compress Flow Cutoff Open Indicator Light Off <Red)
Disc Motion Stopped By Seat Motor Current Peak at Cutoff Close Tor~ue Switch Opens (or CST>
Df~1Tufh~n~~s~a~~~ue
Test ~
1216189 19:3:7 lJOO'ES SOOOH Wlv = 58.78
v' c..
~7ir---*-- IF;* rrii&~~
vam Cp.iolts/v)
- 0
- 50 Force( lbs) rsq = 8.996 19:3:7 1216189 slope = -3;726E--8883 wlvllh Meter gf = -2. 88674
- 188'1. =
14888 lbs C-Clamp Calibrator Calibration Device Serial Number A1006 Calibration Device Cal Date 11/30/89 Calibration Device Sensitiviti 0.504 pv/v/uin Effective Stem Diameter 0.87~0 in St~m Elastic~ty 28~400 X 10E6 PSI Po1ssons kat10 0.291 Calibration Device Force Sensitivity 0.00751 pv/v/lb Valve Information Plant PALISADES Unit 1
Tag Number M0-1042A T).'pe GATE Size 4"
- Ta*rget Tlnust 12600; lbs LAB-NORCO A564-630 1.000 inches E..00 Valve Actuato*r Actuator Type LIMITORQ Size SMB-00 Max Thrust Rate.
14000 lbs Serial N L412163 Order #
145155-0
- Worm Gear Teeth Gear Ratio 23.1 Spring Pack # 0301-112 Actuato*r Moto*r
- Voltage <AC/DC> AC Volts 460 Amp rating 6.00 amps Nominal Speed 1700.00 rpm Start torque 25.00 ft-lb Run Torque 5.00 ft-lb Horse Power 1.60 h.p.
Odentation v'ERT Loc.~tion WYLE Stem Mate*rial Stem Diamete*r Th*reads pe*r in.
Elasticity(10E6)
Poissons Ratio Lead 28.400 psi 0.291 1
Signal Conditioner Calibration Due Date 6/1/90 VOTES Se-rial tt 1::.3371.
v f,
LI OC0290-0014-NL02 ATTACHMENT 3 TO ENCLOSURE 1 Consumers Power Company Palisades Plant Docket 50-255 EDWARD VALVES LETTER DATED FEBRUARY 9, 1990 February 23, 1990 2 Pages
' ( -
)
- -~
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I.
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EdwardValv~s inc a BTR company February 9, 1990 Consumers Power 1945 West Parnall Road Jackson, MI 49201 Attn: James L. Topper Project Engineer
Subject:
Thrust Rating Upgrade on the PORV Block Valves JLT Correspondence 303~89 dated 12/22/89 Ref. PORV Isolation Valve Replacement Project Edward Order No. S.O. E36-05624 Consumers Power P.O. 2003-4153-Q GWO 8304 FC 791 Gentlemen:
Limitorque has verbally informed us that there is no hardware changes required for upgrading the rated thrust to 16000 lbs. They do require that a special test be performed on the actuator and valve stem to verify that the equipment can be rerated. This test is performed at Lynchburg. We are trying to obtain specific details from Limitorque on this item.
Using the Code allowable.stresses, the present stems can sustain a maximum thrust of 13900 lbs. If the allowable stress intensity is based on the actual material properties, the maximum allowable thrust can be increased to 16000 lbs. However, we do not recommend this approach for the following reasons:
- The design specification will have to be revised because it requires the stem be designed in accordance with NB-3500 of Section III. The stem stress intensities must be less than those contained in Table I-1.1 of Section III.
- If a replacement stem is purchased at a future date, its material properties will have to be equal to or greater than those of the present stems. This is a key point which will be very difficult to flag over the service life of the equipment.
A better approach would be to eliminate the thread undercut on the current stem design. This will allow a maximum thrust of 15000 lbs P.O. Box 1961. Ral~!gh. N.C. 27602
- 1900 Sou1h Sall1ders street. Raleigh. N.C. 27603
- 919-832-0525
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Thrust Rating Upgrade on the PORV Block Valves JLT Correspondence 303-89 dated 12/22/89 Page 2 *.-
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L using Code allowable stress intensities. If a different material is used (SA564 Grade 660 H1075), the allowable stem thrust can be increased to 15500 lbs.
Sincerely; copy: J.A. Davis R.W. Spivey File: CP18.Doc