ML20214M309
| ML20214M309 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 08/15/1986 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 2NRC-6-090, 2NRC-6-90, IEB-85-003, IEB-85-3, NUDOCS 8609110053 | |
| Download: ML20214M309 (7) | |
Text
e 2NRC-6-090 h
August 15, 1986 Tf DucluesneLisfit Beaver Valley No. 2 Unit Project Organization Telecopy ( 12 643-Ext.160 S.E.G. Building P.O. Box 328 Shippinport, PA 15077 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION:
Dr. Thomas E. Murley Administrator
SUBJECT:
Beaver Valley Power Station - Unit No. 2 I.E.Bulletin 85-03 Motor Operated Valve Common Mode Failures Gentlemen:
In response to IE Bulletin 85-03, dated November 15, 1985, the attached report is submitted regarding motor-operated valve switch settings.
On June 11, 1986 Region I acknowledged Duquesne Light Company's May 13, 1986 request for an extension of the submittal deadline to August 15, 1986.
If you have any questions regarding this submittal, please contact myself or members of my staff.
DUQUESNE LIGHT COMPANY f
By W. OgCareyVice President [/
RJW/ijr NR/COMM/ MODE Attachment cc: Mr. P. Tam, Project Manager (w/ attachment)
Mr. J. M. Taylor, Director (3) (w/ attachment)
Mr. W. Troskoski, Sr. Resident Inspector (w/ attachment)
Mr. L. Prividy, NRC Resident Inspector (w/ attachment)
INPO Records Center (w/ attachment) 3 NRC Document Control Desk (w/ attachment) i i
A
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8609110053 860815 PDR ADOCK 05000412 Iv O
f United Stat:s Nucicar Regulatory Commission Dr. Thomas E. Murley Motor Operated Valve Common Mode Failures Page 2 COMMONWEALTH OF PENNSYLVANIA )
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SS:
COUNTY OF BEAVER
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On this
/O Y day of FM
,/
, before me, a Notary Public in and for said CoMnwealth and County, personally appeared J. J. Carey, who being duly sworn, deposed and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, and (3) the statenents set forth in the Submittal are true and correct to the best of his knowledge.
&67/ k. W Notary Public SNtilA N. FATTORt. NOTARY PhKiC SHIPPINOPOff 805,BEAVERCOUNff MY CONNIS$10E EIPIRES OCT. 23,1989 Marder, Pennsyleenis Association W NMales
7
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ATTACHMENT BVPS-2 Report On IE Bulletin 85-03 Motor-Operated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings Each of the actions requested by itens "a"
through "e" of IEB 85-03 are addressed below.
This report addresses the information requested for the initial report required by item "e" of the subject bulletin.
a)
A review of the BVPS-2 Auxiliary (emergency) Feedwater Systen verified that no motor-operated valves are used in this systen.
For BVPS-2, therefore, the requirenents of IEB 85-03 apply only to the High Pressure Safety Injection Systen and those parts of the Chenical and Volume Control Systen used for the high pressure injection function.
Table 1 lists the BVPS-2 valves for which IEB 85-03 is applicable (i.e. those valves required to function to initiate high pressure injection).
For each applicable valve, Table 1 includes both the design differential pressure and the maximum differential pressure expected for nonnal or abnonnal events.
The maximum expected differential pressures were conservatively detennined by assuning a single pipe failure downstrean of the valve with pump discharge l.
pressure or volume control tank pressure, as applicable, at the-valve inlet.
l b,c) Tables 1 and 2 identify the torque, torque bypass, and limit I
switch settings.
The torque switch settings in Table 1 were based on valve manufacturer specifications.
Corrective maintenance procedure CMP-2-75M0 VATS-21E will be used to test the valve operators with the Motor Operated Valve Analysis and Test Systen (M0 VATS) equipment.
The valves will be stroke tested, operator paraneters will be measured, documented (as-found) and compared to the previously calculated values or setpoints.
Each valve is analyzed and the signatures retained for history. The valve manufacturers have provided thrust values which ensure proper operation based on design differential pressures.
The referenced procedure will adjust the torque switch settings to the calculated thrust values based on the design dif ferential pressure,and document the final (as-left) settings.
Since the MOVATS procedure is based on the thrust which would be required for the design dif ferential pressure, use of full differential pressure during this test is nat planned.
- However, during preoperational and hot functional testing, proper valve operation under system flow and pressure conditions will be performed to the extent practicable.
7 d)
The established open/close torque switch, torque bypass, position limit, and motor parmeters and stroke-time requirments will be included in the BVPS-2 corrective maintenance procedures.
Recording of these performance parmeters will be required for the "as found" and the "as left" conditions to ensure that the established perfonnance parmeters are achieved for the valves listed in Table 1.
e)~
The completion schedule for confirmation of switch settings is as follows:
Action Completion Date MOVATS testing and switch setting of IEB 85-03 valves 12/1/86 Incorporate changes to maintenance procedures 4/1/87 Submit final report 6/1/87
e
. v,.
TABLE 1 SWITCH MAXIMUM DESIGN BASIS SETTING DIFFERENTIAL DIFFERENTIAL CATEGORY PRESSURE
- PRESSURE, OPERATION TYPE TORQUE SWITCH PSIG VALVE VALVE PSIG ON SAFETY (ALSO SEE SETTINGS PRIOR SAFE VALVE (1)
OPERATOR (1)
FUNCTION OPEN/CLOSE(2) SIGNAL (3)
TABLE 2)
TO ADJUSTMENTS DIRECTION Component ID, NORMAL MAXIMUM W Tag No.,
Manuf acturer, Manufacturer / Type,
- Model, Size / ANSI Rating Motor RPM 1.
2CHS*LCV115C, E Limitorque VCT Isolation 200/200 Close C
3 3
60 4-GM72FB SB-00-15 WNES/ GATE 3600 4"/150 2
2 2.
2CHS*MOV289 Limitorque Normal 2750/2750 Close D
2/1 1.5 2485 3-GM78FN S8-00-15 Charging WNES/ GATE 3600 Line 3"/1500 Isolation 3.
2CHS*M0V310 Limitorque Normal 2750/2750 Close D
2 2
2485 3-GMB8FNH 5B-00-15 Charging WNES/ GATE 3600 Line 3"/1500 Isolation 4.
2CHS*MOV275A, B, C Limitorque Charging 2750/2750 Close C
2.25 3
2485 2-TM78FN SMB-00-10 Pump Velan/ Globe 1700 Mini-Flow 2"/1500 Isolation i
5.
2CHS*M0V373 Limitorque Charging 2750/2750 Close D
2.25 2.25 2485 3-GM78FN SB-00-15 Pump i
WNES/ Gate 3600 Mini-Flow 3"/1500 Isolation
2 TABLE 1 (Con't) f SWITCH MAXIMUM DESIGN BASIS SETTING DIFFERENTIAL
]
DIFFERENTIAL CATEGORY PRESSURE
- PRESSURE, OPERATION TYPE TORQUE SWITCH PSIG i
l VALVE VALVE PSIG ON SAFETY (ALSO SEE SETTINGS PRIOR SAFE VALVE (1)
OPERATOR (1)
FUNCTION OPEN/CLOSE(2.) SIGNAL (3)
TABLE 2)
TO ADJUSTMENTS DIRECTION
=______
l Component ID, NORMAL MAXIMUM W Tag No.,
Manufacturer,
)l Manufacturer / Type,
- Model, Size / ANSI Rating Motor RPM 6.
2CHS*MOV380A, B Limitorque Relief Valve 2750/2750 Open E
1.5 2
2485 2-TM78FNN SMB-00-10 Recirc.
l Velan/ Globe 1700 Path l
2"/1500 Isolation i
l 7.
2CHS*LCV1158, D Limitorque Charging 200/200 Open D
2.5 2.5 60 8-GM72FB SB-00-15 Pump Suction l
WNES/ GATE 3600 From l
8"/150 RWST 3
3 1
8.
2 SIS *MOV867A, B Limitorque Boron 2750/700 Open C
1.5/2 1.5/2 2485 l
3-GM78FN SB-00-15 Inj. Tank 1
WNES/ Gate 3600 Inlet j
3"/1500 Isolation l
9.
2 SIS *MOV867C, D Limitorque Boron 2750/700 Open C
2 2
2485 3-GM78FN SB-00-15 Inj. Tank i
WNES/ Gate 3600 Outlet i
3"/1500 Isolation 1.5 2
i l
i NOTE:
i l
1 - Valve and valve operator information obtained from W drawings and specifications.
2 - Design basis pressure differential obtained from W drawings.
3 - Safety signal operation obtained from System Description 27-15.
l
,~3 TABLE 2 CATEGORY TYPE SUPMARY FOR SAFETY-RELATED MOTOR-OPERATED VALVES Category Type Normal Operation Accident Condition Remarks l
C Limit Open Torque switches and motor overload
- Bypass limit switch setting i
Torque Seated are bypassed in safe direction, based on Westinghouse l
TQS-C bypassed 5%
Valve open and close cutoff by limit Operating Manual i
of valve travel switch set at 951 valve travel i
- TQS-0 bypassed Valve torque seated after limit I
more than 5% of switch cutoff.
valve travel D
Limit Open Torque switches and motor overload TQS-C jumpered out of valve Limit Close are bypassed in safe direction.
close circuit
- TQS-0 bypassed Valve open and close cutoff by limit
- Bypass limit switch setting more than 5% of switch only - set at 95% of travel based on Westinghouse valve travel E
Limit Open Torque switches and motor overload None Limit Close are bypassed in safe direction TQS-C & TQS-0 Valve open and close cutoff by limit l
bypassed 5% of switch only - set at 95% of travel l
l valve travel l